/* ========== CHRONOCAST UNIFIED DESIGN SYSTEM ========== */

/* -----------------------------
   COMPREHENSIVE CSS VARIABLE SYSTEM
   -----------------------------
   Strict usage of CSS variables - NO hardcoded colors
*/

:root {
    /* ================================
       SAAS-LEVEL COLOR PALETTE
       ================================
       Professional enterprise color system
    */
    
    /* PRIMARY BRAND COLOR - Strong, professional blue */
    --primary: #4F46E5;
    --primary-50: #EEF2FF;
    --primary-100: #E0E7FF;
    --primary-200: #C7D2FE;
    --primary-300: #A5B4FC;
    --primary-400: #818CF8;
    --primary-500: #6366F1;
    --primary-600: #4F46E5;
    --primary-700: #4338CA;
    --primary-800: #3730A3;
    --primary-900: #312E81;
    
    /* NEUTRAL BACKGROUND SYSTEM - Clean layers */
    --bg-primary: #FAFAFA;      /* Main background - very light grey */
    --bg-secondary: #FFFFFF;     /* Card backgrounds - pure white */
    --bg-tertiary: #F9FAFB;     /* Subtle section backgrounds */
    --bg-quaternary: #F3F4F6;    /* Hover states */
    
    /* TEXT HIERARCHY - High contrast readability */
    --text-primary: #111827;     /* Main text - very dark grey */
    --text-secondary: #6B7280;   /* Secondary text - medium grey */
    --text-tertiary: #9CA3AF;    /* Muted text - light grey */
    --text-inverse: #FFFFFF;      /* White text on colored backgrounds */
    
    /* CARD SYSTEM - Subtle, professional */
    --card-bg: #FFFFFF;
    --card-border: #E5E7EB;
    --card-shadow: rgba(0, 0, 0, 0.04);
    --card-hover-shadow: rgba(0, 0, 0, 0.08);
    
    /* BORDER SYSTEM - Clean separation */
    --border-color: #E5E7EB;
    --border-light: #F3F4F6;
    --border-strong: #D1D5DB;
    
    /* ACCENT COLORS - For charts and highlights only */
    --accent-blue: #0EA5E9;
    --accent-green: #10B981;
    --accent-amber: #F59E0B;
    --accent-red: #EF4444;
    --accent-purple: #8B5CF6;
    --accent-pink: #EC4899;
    
    /* STATUS COLORS - Semantic meaning */
    --success: #059669;
    --success-light: #D1FAE5;
    --warning: #D97706;
    --warning-light: #FEF3C7;
    --danger: #DC2626;
    --danger-light: #FEE2E2;
    --info: #0891B2;
    --info-light: #CFFAFE;
    
    /* GRAYSCALE SYSTEM - Complete neutral palette */
    --gray-50: #FAFAFA;
    --gray-100: #F5F5F5;
    --gray-200: #E5E7EB;
    --gray-300: #D1D5DB;
    --gray-400: #9CA3AF;
    --gray-500: #6B7280;
    --gray-600: #4B5563;
    --gray-700: #374151;
    --gray-800: #1F2937;
    --gray-900: #111827;

    /* SPACING SYSTEM - Consistent, generous spacing */
    --spacing-xs: 0.25rem;   /* 4px */
    --spacing-sm: 0.5rem;    /* 8px */
    --spacing-md: 0.75rem;   /* 12px */
    --spacing-lg: 1rem;      /* 16px */
    --spacing-xl: 1.5rem;    /* 24px */
    --spacing-2xl: 2rem;     /* 32px */
    --spacing-3xl: 3rem;     /* 48px */
    --spacing-4xl: 4rem;     /* 64px */
    --spacing-5xl: 6rem;     /* 96px */

    /* LAYOUT DIMENSIONS - Modern, spacious */
    --sidebar-width: 280px;
    --sidebar-collapsed-width: 70px;
    --topbar-height: 72px;
    --container-max-width: 1400px;
    --card-border-radius: 16px;
    --button-border-radius: 12px;
    --input-border-radius: 8px;
    --section-spacing: 3rem;

    /* TYPOGRAPHY SYSTEM - Clear hierarchy, excellent readability */
    --font-family-base: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-family-mono: 'JetBrains Mono', 'Fira Code', Consolas, monospace;
    
    /* Font sizes - Larger, more impactful */
    --font-size-xs: 0.75rem;     /* 12px */
    --font-size-sm: 0.875rem;    /* 14px */
    --font-size-base: 1rem;      /* 16px */
    --font-size-lg: 1.125rem;    /* 18px */
    --font-size-xl: 1.25rem;     /* 20px */
    --font-size-2xl: 1.5rem;     /* 24px */
    --font-size-3xl: 1.875rem;   /* 30px */
    --font-size-4xl: 2.25rem;    /* 36px */
    --font-size-5xl: 3rem;       /* 48px */
    --font-size-6xl: 3.75rem;    /* 60px */
    
    /* Font weights - Clear distinction */
    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --font-weight-extrabold: 800;
    --font-weight-black: 900;
    
    /* Line heights - Optimized for readability */
    --line-height-tight: 1.25;
    --line-height-snug: 1.375;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.625;
    --line-height-loose: 2;

    /* SHADOW SYSTEM - Subtle, professional */
    --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.02);
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.04), 0 1px 2px 0 rgba(0, 0, 0, 0.02);
    --shadow-md: 0 4px 8px -2px rgba(0, 0, 0, 0.06), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
    --shadow-lg: 0 8px 16px -4px rgba(0, 0, 0, 0.08), 0 4px 8px -2px rgba(0, 0, 0, 0.04);
    --shadow-xl: 0 16px 32px -8px rgba(0, 0, 0, 0.10), 0 8px 16px -4px rgba(0, 0, 0, 0.06);
    --shadow-2xl: 0 24px 48px -12px rgba(0, 0, 0, 0.15);
    
    /* Shadow colors for different contexts */
    --shadow-card: 0 2px 8px -2px rgba(0, 0, 0, 0.06);
    --shadow-card-hover: 0 8px 24px -4px rgba(0, 0, 0, 0.10);
    --shadow-button: 0 2px 4px -1px rgba(0, 0, 0, 0.08);
    --shadow-button-hover: 0 4px 12px -2px rgba(0, 0, 0, 0.12);

    /* TRANSITIONS & ANIMATIONS - Smooth, professional */
    --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-all: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Specific transitions */
    --transition-hover: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-card: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-button: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fade: opacity 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slide: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);

    /* GRADIENTS - Professional, subtle */
    --gradient-primary: linear-gradient(135deg, var(--primary-600) 0%, var(--primary-700) 100%);
    --gradient-secondary: linear-gradient(135deg, var(--primary-500) 0%, var(--primary-600) 100%);
    --gradient-accent: linear-gradient(135deg, var(--accent-blue) 0%, var(--primary) 100%);
    --gradient-success: linear-gradient(135deg, var(--success) 0%, #059669 100%);
    --gradient-surface: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
    --gradient-card: linear-gradient(145deg, var(--card-bg) 0%, var(--bg-tertiary) 100%);

    /* BORDERS */
    --border-width: 1px;
    --border-width-lg: 2px;
    --border-style: solid;

    /* Z-INDEX SCALE */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
}

/* ================================
   DARK MODE VARIABLES
   ================================
   Professional dark theme with proper contrast
*/
body.dark {
    /* Dark Background System - Deep, professional */
    --bg-primary: #0F0F0F;      /* Deep black for main background */
    --bg-secondary: #1A1A1A;   /* Dark grey for cards */
    --bg-tertiary: #262626;     /* Subtle section backgrounds */
    --bg-quaternary: #404040;   /* Hover states */
    
    /* Dark Text Hierarchy - High contrast, easy on eyes */
    --text-primary: #FAFAFA;    /* Main text - bright white */
    --text-secondary: #D1D5DB;  /* Secondary text - light grey */
    --text-tertiary: #9CA3AF;   /* Muted text - medium grey */
    --text-inverse: #111827;    /* Dark text on light backgrounds */
    
    /* Dark Card System - Subtle depth */
    --card-bg: #1A1A1A;
    --card-border: #404040;
    --card-shadow: rgba(0, 0, 0, 0.25);
    --card-hover-shadow: rgba(0, 0, 0, 0.4);
    
    /* Dark Border System - Visible but not harsh */
    --border-color: #404040;
    --border-light: #262626;
    --border-strong: #525252;
    
    /* Dark Grayscale - Complete neutral palette */
    --gray-50: #0F0F0F;
    --gray-100: #1A1A1A;
    --gray-200: #262626;
    --gray-300: #404040;
    --gray-400: #525252;
    --gray-500: #737373;
    --gray-600: #A3A3A3;
    --gray-700: #D4D4D4;
    --gray-800: #E5E5E5;
    --gray-900: #FAFAFA;
    
    /* Dark Shadows - More prominent for depth */
    --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.4), 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 8px -2px rgba(0, 0, 0, 0.5), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 8px 16px -4px rgba(0, 0, 0, 0.6), 0 4px 8px -2px rgba(0, 0, 0, 0.4);
    --shadow-xl: 0 16px 32px -8px rgba(0, 0, 0, 0.7), 0 8px 16px -4px rgba(0, 0, 0, 0.5);
    --shadow-2xl: 0 24px 48px -12px rgba(0, 0, 0, 0.8);
    
    /* Dark shadow contexts */
    --shadow-card: 0 2px 8px -2px rgba(0, 0, 0, 0.4);
    --shadow-card-hover: 0 8px 24px -4px rgba(0, 0, 0, 0.6);
    --shadow-button: 0 2px 4px -1px rgba(0, 0, 0, 0.3);
    --shadow-button-hover: 0 4px 12px -2px rgba(0, 0, 0, 0.5);
}

/* ================================
   GLOBAL RESET & BASE STYLES
   ================================ */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family-base);
    font-size: var(--font-size-base);
    line-height: var(--line-height-relaxed);
    color: var(--text-secondary);
    background: var(--bg-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: var(--transition-all);
}

/* ================================
   TYPOGRAPHY SYSTEM
   ================================
   Clear hierarchy with excellent readability
*/
h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-weight-bold);
    line-height: var(--line-height-tight);
    margin-bottom: var(--spacing-lg);
    color: var(--text-primary);
    letter-spacing: -0.025em;
}

/* Larger, more impactful headings */
h1 { 
    font-size: var(--font-size-5xl); 
    font-weight: var(--font-weight-black);
    line-height: var(--line-height-snug);
    margin-bottom: var(--spacing-xl);
}
h2 { 
    font-size: var(--font-size-4xl); 
    font-weight: var(--font-weight-extrabold);
    margin-bottom: var(--spacing-xl);
}
h3 { 
    font-size: var(--font-size-3xl); 
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-lg);
}
h4 { 
    font-size: var(--font-size-2xl); 
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-lg);
}
h5 { 
    font-size: var(--font-size-xl); 
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-md);
}
h6 { 
    font-size: var(--font-size-lg); 
    font-weight: var(--font-weight-medium);
    margin-bottom: var(--spacing-md);
}

/* Body text with improved readability */
p {
    margin-bottom: var(--spacing-lg);
    color: var(--text-secondary);
    line-height: var(--line-height-relaxed);
    font-size: var(--font-size-base);
}

/* Section headings for better hierarchy */
.section-title {
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-bold);
    color: var(--text-primary);
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-md);
    border-bottom: 2px solid var(--border-color);
}

.subsection-title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
}

.card-title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.metric-label {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-xs);
}

.metric-value {
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-bold);
    color: var(--text-primary);
    line-height: var(--line-height-tight);
}

/* Text Utilities */
.text-xs { font-size: var(--font-size-xs); }
.text-sm { font-size: var(--font-size-sm); }
.text-base { font-size: var(--font-size-base); }
.text-lg { font-size: var(--font-size-lg); }
.text-xl { font-size: var(--font-size-xl); }
.text-2xl { font-size: var(--font-size-2xl); }
.text-3xl { font-size: var(--font-size-3xl); }
.text-4xl { font-size: var(--font-size-4xl); }

.font-light { font-weight: var(--font-weight-light); }
.font-normal { font-weight: var(--font-weight-normal); }
.font-medium { font-weight: var(--font-weight-medium); }
.font-semibold { font-weight: var(--font-weight-semibold); }
.font-bold { font-weight: var(--font-weight-bold); }
.font-extrabold { font-weight: var(--font-weight-extrabold); }

/* Text Colors */
.text-primary { color: var(--primary) !important; }
.text-secondary { color: var(--text-secondary) !important; }
.text-muted { color: var(--gray-500) !important; }
.text-success { color: var(--success) !important; }
.text-warning { color: var(--warning) !important; }
.text-danger { color: var(--danger) !important; }
.text-info { color: var(--info) !important; }

/* ================================
   LAYOUT SYSTEM
   ================================ */
.container {
    width: 100%;
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.container-fluid {
    width: 100%;
    padding: 0 var(--spacing-md);
}

/* Flexbox Utilities */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-row { flex-direction: row; }
.flex-wrap { flex-wrap: wrap; }
.flex-nowrap { flex-wrap: nowrap; }

.items-start { align-items: flex-start; }
.items-center { align-items: center; }
.items-end { align-items: flex-end; }
.items-stretch { align-items: stretch; }

.justify-start { justify-content: flex-start; }
.justify-center { justify-content: center; }
.justify-end { justify-content: flex-end; }
.justify-between { justify-content: space-between; }
.justify-around { justify-content: space-around; }

.flex-1 { flex: 1; }
.flex-auto { flex: auto; }
.flex-none { flex: none; }

/* Grid Utilities */
.grid { display: grid; }
.grid-cols-1 { grid-template-columns: repeat(1, 1fr); }
.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid-cols-4 { grid-template-columns: repeat(4, 1fr); }

/* Position Utilities */
.relative { position: relative; }
.absolute { position: absolute; }
.fixed { position: fixed; }
.sticky { position: sticky; }

/* Width & Height */
.w-full { width: 100%; }
.w-auto { width: auto; }
.w-0 { width: 0; }
.w-half { width: 50%; }

.h-full { height: 100%; }
.h-auto { height: auto; }
.h-screen { height: 100vh; }

/* ================================
   SPACING UTILITIES
   ================================ */
/* Margin */
.m-0 { margin: 0; }
.m-1 { margin: var(--spacing-xs); }
.m-2 { margin: var(--spacing-sm); }
.m-3 { margin: var(--spacing-md); }
.m-4 { margin: var(--spacing-lg); }
.m-5 { margin: var(--spacing-xl); }
.m-6 { margin: var(--spacing-2xl); }
.m-7 { margin: var(--spacing-3xl); }
.m-auto { margin: auto; }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }
.mt-5 { margin-top: var(--spacing-xl); }
.mt-6 { margin-top: var(--spacing-2xl); }
.mt-7 { margin-top: var(--spacing-3xl); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }
.mb-5 { margin-bottom: var(--spacing-xl); }
.mb-6 { margin-bottom: var(--spacing-2xl); }
.mb-7 { margin-bottom: var(--spacing-3xl); }

.ml-0 { margin-left: 0; }
.ml-1 { margin-left: var(--spacing-xs); }
.ml-2 { margin-left: var(--spacing-sm); }
.ml-3 { margin-left: var(--spacing-md); }
.ml-4 { margin-left: var(--spacing-lg); }
.ml-5 { margin-left: var(--spacing-xl); }
.ml-6 { margin-left: var(--spacing-2xl); }
.ml-7 { margin-left: var(--spacing-3xl); }

.mr-0 { margin-right: 0; }
.mr-1 { margin-right: var(--spacing-xs); }
.mr-2 { margin-right: var(--spacing-sm); }
.mr-3 { margin-right: var(--spacing-md); }
.mr-4 { margin-right: var(--spacing-lg); }
.mr-5 { margin-right: var(--spacing-xl); }
.mr-6 { margin-right: var(--spacing-2xl); }
.mr-7 { margin-right: var(--spacing-3xl); }

/* Padding */
.p-0 { padding: 0; }
.p-1 { padding: var(--spacing-xs); }
.p-2 { padding: var(--spacing-sm); }
.p-3 { padding: var(--spacing-md); }
.p-4 { padding: var(--spacing-lg); }
.p-5 { padding: var(--spacing-xl); }
.p-6 { padding: var(--spacing-2xl); }
.p-7 { padding: var(--spacing-3xl); }

.pt-0 { padding-top: 0; }
.pt-1 { padding-top: var(--spacing-xs); }
.pt-2 { padding-top: var(--spacing-sm); }
.pt-3 { padding-top: var(--spacing-md); }
.pt-4 { padding-top: var(--spacing-lg); }
.pt-5 { padding-top: var(--spacing-xl); }
.pt-6 { padding-top: var(--spacing-2xl); }
.pt-7 { padding-top: var(--spacing-3xl); }

.pb-0 { padding-bottom: 0; }
.pb-1 { padding-bottom: var(--spacing-xs); }
.pb-2 { padding-bottom: var(--spacing-sm); }
.pb-3 { padding-bottom: var(--spacing-md); }
.pb-4 { padding-bottom: var(--spacing-lg); }
.pb-5 { padding-bottom: var(--spacing-xl); }
.pb-6 { padding-bottom: var(--spacing-2xl); }
.pb-7 { padding-bottom: var(--spacing-3xl); }

.pl-0 { padding-left: 0; }
.pl-1 { padding-left: var(--spacing-xs); }
.pl-2 { padding-left: var(--spacing-sm); }
.pl-3 { padding-left: var(--spacing-md); }
.pl-4 { padding-left: var(--spacing-lg); }
.pl-5 { padding-left: var(--spacing-xl); }
.pl-6 { padding-left: var(--spacing-2xl); }
.pl-7 { padding-left: var(--spacing-3xl); }

.pr-0 { padding-right: 0; }
.pr-1 { padding-right: var(--spacing-xs); }
.pr-2 { padding-right: var(--spacing-sm); }
.pr-3 { padding-right: var(--spacing-md); }
.pr-4 { padding-right: var(--spacing-lg); }
.pr-5 { padding-right: var(--spacing-xl); }
.pr-6 { padding-right: var(--spacing-2xl); }
.pr-7 { padding-right: var(--spacing-3xl); }

/* Gap */
.gap-0 { gap: 0; }
.gap-1 { gap: var(--spacing-xs); }
.gap-2 { gap: var(--spacing-sm); }
.gap-3 { gap: var(--spacing-md); }
.gap-4 { gap: var(--spacing-lg); }
.gap-5 { gap: var(--spacing-xl); }
.gap-6 { gap: var(--spacing-2xl); }
.gap-7 { gap: var(--spacing-3xl); }

/* ================================
   UNIFIED COMPONENT SYSTEM
   ================================ */

/* Buttons - Enhanced SaaS-level System */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    line-height: 1;
    border: var(--border-width) var(--border-style) transparent;
    border-radius: var(--button-border-radius);
    cursor: pointer;
    text-decoration: none;
    transition: var(--transition-button);
    position: relative;
    overflow: hidden;
    white-space: nowrap;
    user-select: none;
    box-shadow: var(--shadow-button);
    font-family: var(--font-family-base);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
    transform: none !important;
    box-shadow: var(--shadow-xs) !important;
}

/* Button Variants - Professional styling */
.btn-primary {
    background: var(--gradient-primary);
    color: var(--text-inverse);
    border-color: var(--primary-600);
    box-shadow: var(--shadow-button);
}

.btn-primary:hover:not(:disabled) {
    background: var(--primary-700);
    border-color: var(--primary-800);
    transform: translateY(-2px) scale(1.02);
    box-shadow: var(--shadow-button-hover);
}

.btn-primary:active:not(:disabled) {
    transform: translateY(-1px) scale(1.01);
    box-shadow: var(--shadow-sm);
}

.btn-secondary {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border-color: var(--border-color);
    box-shadow: var(--shadow-sm);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--bg-quaternary);
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-outline {
    background: transparent;
    color: var(--primary);
    border-color: var(--primary);
    box-shadow: none;
}

.btn-outline:hover:not(:disabled) {
    background: var(--primary);
    color: var(--text-inverse);
    transform: translateY(-1px);
    box-shadow: var(--shadow-button);
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
    border-color: transparent;
    box-shadow: none;
}

.btn-ghost:hover:not(:disabled) {
    background: var(--bg-quaternary);
    color: var(--text-primary);
}

.btn-success {
    background: var(--success);
    color: var(--text-inverse);
    border-color: var(--success);
}

.btn-success:hover:not(:disabled) {
    background: #047857;
    transform: translateY(-1px);
    box-shadow: var(--shadow-button-hover);
}

.btn-danger {
    background: var(--danger);
    color: var(--text-inverse);
    border-color: var(--danger);
}

.btn-danger:hover:not(:disabled) {
    background: #B91C1C;
    transform: translateY(-1px);
    box-shadow: var(--shadow-button-hover);
}

/* Button Sizes - Consistent proportions */
.btn-sm {
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: var(--font-size-sm);
    border-radius: var(--input-border-radius);
}

.btn-lg {
    padding: var(--spacing-lg) var(--spacing-2xl);
    font-size: var(--font-size-lg);
    border-radius: var(--button-border-radius);
}

.btn-xl {
    padding: var(--spacing-xl) var(--spacing-3xl);
    font-size: var(--font-size-xl);
    border-radius: var(--button-border-radius);
}

/* Cards - Enhanced SaaS-level System */
.card {
    background: var(--card-bg);
    border: var(--border-width) var(--border-style) var(--card-border);
    border-radius: var(--card-border-radius);
    box-shadow: var(--shadow-card);
    transition: var(--transition-card);
    position: relative;
    overflow: hidden;
    margin-bottom: var(--spacing-xl);
    height: 100%;
    display: flex;
    flex-direction: column;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-card-hover);
    border-color: var(--primary-200);
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
    opacity: 0;
    transition: var(--transition-fade);
}

.card:hover::before {
    opacity: 1;
}

.card-header {
    background: var(--bg-secondary);
    border-bottom: var(--border-width) var(--border-style) var(--card-border);
    border-radius: var(--card-border-radius) var(--card-border-radius) 0 0;
    padding: var(--spacing-xl);
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
}

.card-body {
    padding: var(--spacing-xl);
    flex: 1;
    display: flex;
    flex-direction: column;
}

.card-footer {
    background: var(--bg-tertiary);
    border-top: var(--border-width) var(--border-style) var(--card-border);
    border-radius: 0 0 var(--card-border-radius) var(--card-border-radius);
    padding: var(--spacing-lg) var(--spacing-xl);
    color: var(--text-secondary);
}

/* Card Grid Layout - Better spacing */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-2xl);
}

.card-grid .card {
    margin-bottom: 0;
}

/* Enhanced Card Variants */
.card-interactive {
    cursor: pointer;
}

.card-interactive:hover {
    transform: translateY(-6px) scale(1.02);
    box-shadow: var(--shadow-lg);
}

.card-compact .card-header,
.card-compact .card-body,
.card-compact .card-footer {
    padding: var(--spacing-lg);
}

.card-elevated {
    box-shadow: var(--shadow-md);
}

.card-elevated:hover {
    box-shadow: var(--shadow-xl);
}

/* Form Controls - Enhanced SaaS-level System */
.form-control {
    display: block;
    width: 100%;
    padding: var(--spacing-lg) var(--spacing-xl);
    font-size: var(--font-size-base);
    line-height: var(--line-height-normal);
    color: var(--text-primary);
    background: var(--bg-secondary);
    border: var(--border-width) var(--border-style) var(--border-color);
    border-radius: var(--input-border-radius);
    transition: var(--transition-normal);
    font-family: var(--font-family-base);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
    background: var(--bg-secondary);
    transform: translateY(-1px);
}

.form-control::placeholder {
    color: var(--text-tertiary);
    font-style: italic;
}

.form-label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
    font-size: var(--font-size-sm);
}

.form-select {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='M6 8l4 4 4-4'/%3e%3c/svg%3e");
    background-position: right var(--spacing-lg) center;
    background-repeat: no-repeat;
    background-size: 1.5em 1.5em;
    padding-right: var(--spacing-3xl);
}

/* Enhanced Form Groups */
.form-group {
    margin-bottom: var(--spacing-xl);
}

.form-row {
    display: flex;
    gap: var(--spacing-lg);
    align-items: end;
}

.form-text {
    font-size: var(--font-size-sm);
    color: var(--text-tertiary);
    margin-top: var(--spacing-xs);
}

/* Tables - Unified System */
.table {
    width: 100%;
    border-collapse: collapse;
    color: var(--text-primary);
}

.table th,
.table td {
    padding: var(--spacing-sm) var(--spacing-md);
    text-align: left;
    border-bottom: var(--border-width) var(--border-style) var(--border-color);
}

.table th {
    font-weight: var(--font-weight-semibold);
    background: var(--gray-50);
    color: var(--text-primary);
}

.table-striped > tbody > tr:nth-of-type(odd) {
    background: var(--gray-50);
}

.table-hover > tbody > tr:hover {
    background: var(--gray-100);
}

/* Alerts - Unified System */
.alert {
    padding: var(--spacing-md);
    border: var(--border-width) var(--border-style) transparent;
    border-radius: var(--card-border-radius);
    margin-bottom: var(--spacing-md);
}

.alert-primary {
    background: rgba(99, 102, 241, 0.1);
    border-color: rgba(99, 102, 241, 0.3);
    color: var(--primary);
}

.alert-success {
    background: rgba(16, 185, 129, 0.1);
    border-color: rgba(16, 185, 129, 0.3);
    color: var(--success);
}

.alert-warning {
    background: rgba(245, 158, 11, 0.1);
    border-color: rgba(245, 158, 11, 0.3);
    color: var(--warning);
}

.alert-danger {
    background: rgba(239, 68, 68, 0.1);
    border-color: rgba(239, 68, 68, 0.3);
    color: var(--danger);
}

/* Badges - Unified System */
.badge {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    line-height: 1;
    text-align: center;
    white-space: nowrap;
    vertical-align: baseline;
    border-radius: var(--input-border-radius);
}

.badge-primary { background: var(--primary); color: white; }
.badge-secondary { background: var(--gray-500); color: white; }
.badge-success { background: var(--success); color: white; }
.badge-warning { background: var(--warning); color: white; }
.badge-danger { background: var(--danger); color: white; }
.badge-info { background: var(--info); color: white; }

/* ================================
   LOADING STATES & ANIMATIONS
   ================================
   Professional loading experiences
*/

/* Enhanced Loading Spinner */
.loading-spinner {
    width: 48px;
    height: 48px;
    border: 4px solid var(--border-light);
    border-top: 4px solid var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: var(--spacing-xl) auto;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Smaller Spinner */
.spinner-sm {
    width: 24px;
    height: 24px;
    border: 3px solid var(--border-light);
    border-top: 3px solid var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

/* Large Spinner */
.spinner-lg {
    width: 64px;
    height: 64px;
    border: 6px solid var(--border-light);
    border-top: 6px solid var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

/* Enhanced Loading Overlay */
.loading-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-modal);
    border-radius: var(--card-border-radius);
    animation: fadeIn 0.3s ease-out;
}

body.dark .loading-overlay {
    background: rgba(0, 0, 0, 0.8);
}

/* Skeleton Loading */
.skeleton {
    background: linear-gradient(90deg, var(--border-light) 25%, var(--border-color) 50%, var(--border-light) 75%);
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s infinite;
    border-radius: var(--card-border-radius);
}

@keyframes skeleton-loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* Fade In Animation */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Slide In Animation */
@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Scale In Animation */
@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* Animation Classes */
.animate-fade-in {
    animation: fadeIn 0.5s ease-out;
}

.animate-slide-in {
    animation: slideIn 0.4s ease-out;
}

.animate-scale-in {
    animation: scaleIn 0.3s ease-out;
}

/* Staggered animations for lists */
.animate-stagger > * {
    animation: fadeIn 0.4s ease-out;
    animation-fill-mode: both;
}

.animate-stagger > *:nth-child(1) { animation-delay: 0.1s; }
.animate-stagger > *:nth-child(2) { animation-delay: 0.2s; }
.animate-stagger > *:nth-child(3) { animation-delay: 0.3s; }
.animate-stagger > *:nth-child(4) { animation-delay: 0.4s; }
.animate-stagger > *:nth-child(5) { animation-delay: 0.5s; }

/* ================================
   SPECIALIZED COMPONENTS
   ================================ */

/* Stat Cards */
.stat-card {
    background: var(--card-bg);
    border: var(--border-width) var(--border-style) var(--border-color);
    border-radius: var(--card-border-radius);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-all);
    position: relative;
    overflow: hidden;
    margin-bottom: var(--spacing-lg);
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary);
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.stat-card:hover::before {
    opacity: 1;
}

.stat-number {
    font-size: var(--font-size-4xl);
    font-weight: var(--font-weight-extrabold);
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    font-weight: var(--font-weight-medium);
}

/* ================================
   CHARTS & DATA VISUALIZATION
   ================================
   Professional chart styling system
*/

/* Chart Container - Enhanced */
.chart-container {
    background: var(--card-bg);
    border: var(--border-width) var(--border-style) var(--card-border);
    border-radius: var(--card-border-radius);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    box-shadow: var(--shadow-card);
    transition: var(--transition-card);
    position: relative;
    min-height: 300px;
}

.chart-container:hover {
    box-shadow: var(--shadow-card-hover);
    border-color: var(--primary-200);
}

.chart-title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.chart-subtitle {
    font-size: var(--font-size-sm);
    color: var(--text-tertiary);
    margin-bottom: var(--spacing-lg);
    line-height: var(--line-height-relaxed);
}

/* Chart Canvas Styling */
.chart-container canvas {
    max-height: 400px;
    transition: var(--transition-normal);
}

/* Chart Loading State */
.chart-loading {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--card-border-radius);
    z-index: 10;
}

body.dark .chart-loading {
    background: rgba(0, 0, 0, 0.7);
}

/* Chart Color Palette - Professional */
.chart-colors {
    --chart-primary: var(--primary);
    --chart-secondary: var(--accent-blue);
    --chart-success: var(--accent-green);
    --chart-warning: var(--accent-amber);
    --chart-danger: var(--accent-red);
    --chart-purple: var(--accent-purple);
    --chart-pink: var(--accent-pink);
    --chart-gray: var(--gray-400);
}

/* Chart Grid Lines */
.chart-grid {
    border-color: var(--border-light) !important;
    color: var(--text-tertiary) !important;
}

/* Chart Axis Labels */
.chart-axis {
    color: var(--text-secondary) !important;
    font-size: var(--font-size-xs) !important;
    font-weight: var(--font-weight-medium) !important;
}

/* Chart Legend */
.chart-legend {
    font-size: var(--font-size-sm) !important;
    color: var(--text-secondary) !important;
    padding: var(--spacing-sm) !important;
}

/* Chart Tooltip */
.chart-tooltip {
    background: var(--bg-secondary) !important;
    border: var(--border-width) var(--border-style) var(--border-color) !important;
    border-radius: var(--input-border-radius) !important;
    box-shadow: var(--shadow-lg) !important;
    padding: var(--spacing-md) !important;
    font-size: var(--font-size-sm) !important;
    color: var(--text-primary) !important;
}

body.dark .chart-tooltip {
    background: var(--bg-primary) !important;
    border-color: var(--border-color) !important;
}

/* Specific Chart Types */

/* Line Chart */
.chart-line {
    --line-width: 3px;
    --point-size: 6px;
    --point-hover-size: 8px;
}

/* Bar Chart */
.chart-bar {
    --bar-radius: 4px;
    --bar-spacing: 2px;
}

/* Pie Chart */
.chart-pie {
    --pie-border-width: 2px;
    --pie-border-color: var(--card-bg);
}

/* Donut Chart */
.chart-donut {
    --donut-inner-radius: 60%;
    --donut-border-width: 2px;
    --donut-border-color: var(--card-bg);
}

/* Area Chart */
.chart-area {
    --area-opacity: 0.3;
    --area-gradient-start: rgba(79, 70, 229, 0.3);
    --area-gradient-end: rgba(79, 70, 229, 0.05);
}

/* Chart Responsive Design */
@media (max-width: 768px) {
    .chart-container {
        padding: var(--spacing-lg);
        min-height: 250px;
    }
    
    .chart-container canvas {
        max-height: 250px;
    }
    
    .chart-title {
        font-size: var(--font-size-base);
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-xs);
    }
    
    .chart-legend {
        font-size: var(--font-size-xs) !important;
    }
}

@media (max-width: 480px) {
    .chart-container {
        padding: var(--spacing-md);
        min-height: 200px;
    }
    
    .chart-container canvas {
        max-height: 200px;
    }
    
    .chart-subtitle {
        font-size: var(--font-size-xs);
    }
}

/* Page Header */
.page-header {
    background: var(--bg-secondary);
    border-bottom: var(--border-width) var(--border-style) var(--border-color);
    padding: var(--spacing-xl) 0;
    margin-bottom: var(--spacing-xl);
}

.page-title {
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-extrabold);
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.page-description {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
}

/* ================================
   RESPONSIVE DESIGN
   ================================
   Professional responsive breakpoints
*/

/* Large Desktop */
@media (max-width: 1400px) {
    .container {
        max-width: 1200px;
    }
    
    .card-grid.grid-cols-4 {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* Desktop */
@media (max-width: 1200px) {
    .card-grid.grid-cols-4 {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .card-grid.grid-cols-5 {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .page-title {
        font-size: var(--font-size-4xl);
    }
}

/* Tablet Landscape */
@media (max-width: 1024px) {
    .card-grid.grid-cols-4 {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .card-grid.grid-cols-5 {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .card-grid.grid-cols-3 {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .page-title {
        font-size: var(--font-size-3xl);
    }
    
    .metric-value {
        font-size: var(--font-size-2xl);
    }
}

/* Tablet Portrait */
@media (max-width: 768px) {
    .container {
        padding: 0 var(--spacing-lg);
    }
    
    .card-grid.grid-cols-4,
    .card-grid.grid-cols-3,
    .card-grid.grid-cols-5,
    .card-grid.grid-cols-2 {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .page-header {
        padding: var(--spacing-xl) 0;
        flex-direction: column;
        align-items: flex-start !important;
        gap: var(--spacing-lg);
    }
    
    .page-title {
        font-size: var(--font-size-2xl);
        margin-bottom: var(--spacing-sm);
    }
    
    .page-description {
        font-size: var(--font-size-base);
    }
    
    .metric-value {
        font-size: var(--font-size-xl);
    }
    
    .form-row {
        flex-direction: column;
        gap: 0;
    }
    
    .ml-3 {
        margin-left: 0 !important;
    }
    
    .btn-lg {
        padding: var(--spacing-md) var(--spacing-xl);
        font-size: var(--font-size-base);
    }
    
    .card-header,
    .card-body {
        padding: var(--spacing-lg);
    }
    
    /* Mobile sidebar adjustments */
    .dashboard-sidebar {
        transform: translateX(-100%);
    }
    
    .dashboard-sidebar.mobile-open {
        transform: translateX(0);
    }
    
    .dashboard-main {
        margin-left: 0;
    }
    
    .mobile-sidebar-toggle {
        display: block;
    }
    
    .dashboard-topbar {
        padding: 0 var(--spacing-lg);
    }
    
    .dashboard-content {
        padding: var(--spacing-lg);
    }
}

/* Mobile */
@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .dashboard-sidebar {
        width: 100%;
        max-width: var(--sidebar-width);
    }
    
    .dashboard-content {
        padding: var(--spacing-md);
    }
    
    .dashboard-topbar {
        padding: 0 var(--spacing-md);
    }
    
    .topbar-actions {
        gap: var(--spacing-sm);
    }
    
    .page-title {
        font-size: var(--font-size-xl);
    }
    
    .metric-value {
        font-size: var(--font-size-lg);
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .btn-sm {
        width: auto;
    }
    
    .card-header,
    .card-body,
    .card-footer {
        padding: var(--spacing-md);
    }
    
    .stat-card {
        padding: var(--spacing-md);
    }
    
    /* Stack metrics on mobile */
    .row > .col-6 {
        margin-bottom: var(--spacing-lg);
    }
}

/* ================================
   UTILITY CLASSES - ENHANCED
   ================================
   Professional utility system
*/

/* Display */
.d-none { display: none !important; }
.d-block { display: block !important; }
.d-flex { display: flex !important; }
.d-grid { display: grid !important; }
.d-inline { display: inline !important; }
.d-inline-block { display: inline-block !important; }
.d-inline-flex { display: inline-flex !important; }

/* Flexbox Enhancements */
.flex-col { flex-direction: column; }
.flex-row { flex-direction: row; }
.flex-wrap { flex-wrap: wrap; }
.flex-nowrap { flex-wrap: nowrap; }
.flex-1 { flex: 1; }
.flex-auto { flex: auto; }
.flex-none { flex: none; }
.flex-shrink-0 { flex-shrink: 0; }
.flex-grow { flex-grow: 1; }
.flex-grow-0 { flex-grow: 0; }

/* Alignment */
.items-start { align-items: flex-start; }
.items-center { align-items: center; }
.items-end { align-items: flex-end; }
.items-stretch { align-items: stretch; }
.items-baseline { align-items: baseline; }

.justify-start { justify-content: flex-start; }
.justify-center { justify-content: center; }
.justify-end { justify-content: flex-end; }
.justify-between { justify-content: space-between; }
.justify-around { justify-content: space-around; }
.justify-evenly { justify-content: space-evenly; }

/* Text Alignment */
.text-left { text-align: left !important; }
.text-center { text-align: center !important; }
.text-right { text-align: right !important; }
.text-justify { text-align: justify !important; }

/* Text Transform */
.capitalize { text-transform: capitalize !important; }
.uppercase { text-transform: uppercase !important; }
.lowercase { text-transform: lowercase !important; }

/* Position */
.relative { position: relative !important; }
.absolute { position: absolute !important; }
.fixed { position: fixed !important; }
.sticky { position: sticky !important; }
.static { position: static !important; }

/* Top/Right/Bottom/Left */
.top-0 { top: 0 !important; }
.top-1 { top: var(--spacing-xs) !important; }
.top-2 { top: var(--spacing-sm) !important; }
.top-4 { top: var(--spacing-lg) !important; }

.right-0 { right: 0 !important; }
.right-1 { right: var(--spacing-xs) !important; }
.right-2 { right: var(--spacing-sm) !important; }
.right-4 { right: var(--spacing-lg) !important; }

.bottom-0 { bottom: 0 !important; }
.bottom-1 { bottom: var(--spacing-xs) !important; }
.bottom-2 { bottom: var(--spacing-sm) !important; }
.bottom-4 { bottom: var(--spacing-lg) !important; }

.left-0 { left: 0 !important; }
.left-1 { left: var(--spacing-xs) !important; }
.left-2 { left: var(--spacing-sm) !important; }
.left-4 { left: var(--spacing-lg) !important; }

/* Width & Height */
.w-full { width: 100% !important; }
.w-auto { width: auto !important; }
.w-0 { width: 0 !important; }
.w-half { width: 50% !important; }
.w-1\/3 { width: 33.333333% !important; }
.w-2\/3 { width: 66.666667% !important; }
.w-1\/4 { width: 25% !important; }
.w-3\/4 { width: 75% !important; }

.h-full { height: 100% !important; }
.h-auto { height: auto !important; }
.h-screen { height: 100vh !important; }
.h-0 { height: 0 !important; }
.h-half { height: 50% !important; }

/* Min/Max Width/Height */
.min-w-0 { min-width: 0 !important; }
.min-w-full { min-width: 100% !important; }
.max-w-full { max-width: 100% !important; }
.min-h-0 { min-height: 0 !important; }
.min-h-full { min-height: 100% !important; }
.max-h-full { max-height: 100% !important; }

/* Overflow */
.overflow-hidden { overflow: hidden !important; }
.overflow-auto { overflow: auto !important; }
.overflow-scroll { overflow: scroll !important; }
.overflow-visible { overflow: visible !important; }
.overflow-x-hidden { overflow-x: hidden !important; }
.overflow-y-hidden { overflow-y: hidden !important; }
.overflow-x-auto { overflow-x: auto !important; }
.overflow-y-auto { overflow-y: auto !important; }

/* Borders */
.border { border: var(--border-width) var(--border-style) var(--border-color) !important; }
.border-0 { border: none !important; }
.border-t { border-top: var(--border-width) var(--border-style) var(--border-color) !important; }
.border-b { border-bottom: var(--border-width) var(--border-style) var(--border-color) !important; }
.border-l { border-left: var(--border-width) var(--border-style) var(--border-color) !important; }
.border-r { border-right: var(--border-width) var(--border-style) var(--border-color) !important; }

.border-primary { border-color: var(--primary) !important; }
.border-secondary { border-color: var(--text-secondary) !important; }
.border-success { border-color: var(--success) !important; }
.border-danger { border-color: var(--danger) !important; }
.border-warning { border-color: var(--warning) !important; }
.border-info { border-color: var(--info) !important; }

/* Border Radius */
.rounded { border-radius: var(--card-border-radius) !important; }
.rounded-sm { border-radius: var(--input-border-radius) !important; }
.rounded-lg { border-radius: var(--button-border-radius) !important; }
.rounded-xl { border-radius: var(--card-border-radius) !important; }
.rounded-2xl { border-radius: calc(var(--card-border-radius) * 1.5) !important; }
.rounded-full { border-radius: 50% !important; }
.rounded-none { border-radius: 0 !important; }

/* Shadows */
.shadow-sm { box-shadow: var(--shadow-sm) !important; }
.shadow { box-shadow: var(--shadow-md) !important; }
.shadow-lg { box-shadow: var(--shadow-lg) !important; }
.shadow-xl { box-shadow: var(--shadow-xl) !important; }
.shadow-2xl { box-shadow: var(--shadow-2xl) !important; }
.shadow-none { box-shadow: none !important; }

/* Opacity */
.opacity-0 { opacity: 0 !important; }
.opacity-25 { opacity: 0.25 !important; }
.opacity-50 { opacity: 0.5 !important; }
.opacity-75 { opacity: 0.75 !important; }
.opacity-100 { opacity: 1 !important; }

/* Cursor */
.cursor-pointer { cursor: pointer !important; }
.cursor-default { cursor: default !important; }
.cursor-not-allowed { cursor: not-allowed !important; }
.cursor-wait { cursor: wait !important; }
.cursor-text { cursor: text !important; }
.cursor-move { cursor: move !important; }
.cursor-help { cursor: help !important; }

/* User Select */
.select-none { user-select: none !important; }
.select-all { user-select: all !important; }
.select-text { user-select: text !important; }
.select-auto { user-select: auto !important; }

/* Pointer Events */
.pointer-events-none { pointer-events: none !important; }
.pointer-events-auto { pointer-events: auto !important; }

/* Z-Index */
.z-0 { z-index: 0 !important; }
.z-10 { z-index: 10 !important; }
.z-20 { z-index: 20 !important; }
.z-30 { z-index: 30 !important; }
.z-40 { z-index: 40 !important; }
.z-50 { z-index: 50 !important; }
.z-auto { z-index: auto !important; }

/* Space Between */
.space-y-1 > * + * { margin-top: var(--spacing-xs) !important; }
.space-y-2 > * + * { margin-top: var(--spacing-sm) !important; }
.space-y-3 > * + * { margin-top: var(--spacing-md) !important; }
.space-y-4 > * + * { margin-top: var(--spacing-lg) !important; }
.space-y-5 > * + * { margin-top: var(--spacing-xl) !important; }

.space-x-1 > * + * { margin-left: var(--spacing-xs) !important; }
.space-x-2 > * + * { margin-left: var(--spacing-sm) !important; }
.space-x-3 > * + * { margin-left: var(--spacing-md) !important; }
.space-x-4 > * + * { margin-left: var(--spacing-lg) !important; }
.space-x-5 > * + * { margin-left: var(--spacing-xl) !important; }

/* Font Weight */
.font-light { font-weight: var(--font-weight-light) !important; }
.font-normal { font-weight: var(--font-weight-normal) !important; }
.font-medium { font-weight: var(--font-weight-medium) !important; }
.font-semibold { font-weight: var(--font-weight-semibold) !important; }
.font-bold { font-weight: var(--font-weight-bold) !important; }
.font-extrabold { font-weight: var(--font-weight-extrabold) !important; }

/* Line Height */
.leading-none { line-height: 1 !important; }
.leading-tight { line-height: var(--line-height-tight) !important; }
.leading-snug { line-height: var(--line-height-snug) !important; }
.leading-normal { line-height: var(--line-height-normal) !important; }
.leading-relaxed { line-height: var(--line-height-relaxed) !important; }
.leading-loose { line-height: var(--line-height-loose) !important; }

/* Object Fit */
.object-contain { object-fit: contain !important; }
.object-cover { object-fit: cover !important; }
.object-fill { object-fit: fill !important; }
.object-none { object-fit: none !important; }
.object-scale-down { object-fit: scale-down !important; }

/* Transition */
.transition { transition: var(--transition-all) !important; }
.transition-none { transition: none !important; }
.transition-all { transition: all var(--transition-normal) !important; }
.transition-colors { transition: color var(--transition-normal), background-color var(--transition-normal), border-color var(--transition-normal) !important; }
.transition-opacity { transition: opacity var(--transition-normal) !important; }
.transition-shadow { transition: box-shadow var(--transition-normal) !important; }
.transition-transform { transition: transform var(--transition-normal) !important; }

/* Transform */
.transform { transform: translateX(var(--translate-x, 0)) translateY(var(--translate-y, 0)) rotate(var(--rotate, 0)) skewX(var(--skew-x, 0)) skewY(var(--skew-y, 0)) scaleX(var(--scale-x, 1)) scaleY(var(--scale-y, 1)) !important; }
.transform-none { transform: none !important; }

.scale-95 { transform: scale(0.95) !important; }
.scale-100 { transform: scale(1) !important; }
.scale-105 { transform: scale(1.05) !important; }
.scale-110 { transform: scale(1.1) !important; }
.scale-125 { transform: scale(1.25) !important; }

.rotate-45 { transform: rotate(45deg) !important; }
.rotate-90 { transform: rotate(90deg) !important; }
.rotate-180 { transform: rotate(180deg) !important; }

-rotate-45 { transform: rotate(-45deg) !important; }
-rotate-90 { transform: rotate(-90deg) !important; }
-rotate-180 { transform: rotate(-180deg) !important; }

.translate-x-1 { transform: translateX(var(--spacing-xs)) !important; }
.translate-x-2 { transform: translateX(var(--spacing-sm)) !important; }
.translate-x-4 { transform: translateX(var(--spacing-lg)) !important; }

.-translate-x-1 { transform: translateX(calc(-1 * var(--spacing-xs))) !important; }
.-translate-x-2 { transform: translateX(calc(-1 * var(--spacing-sm))) !important; }
.-translate-x-4 { transform: translateX(calc(-1 * var(--spacing-lg))) !important; }

.translate-y-1 { transform: translateY(var(--spacing-xs)) !important; }
.translate-y-2 { transform: translateY(var(--spacing-sm)) !important; }
.translate-y-4 { transform: translateY(var(--spacing-lg)) !important; }

.-translate-y-1 { transform: translateY(calc(-1 * var(--spacing-xs))) !important; }
.-translate-y-2 { transform: translateY(calc(-1 * var(--spacing-sm))) !important; }
.-translate-y-4 { transform: translateY(calc(-1 * var(--spacing-lg))) !important; }

/* ================================
   RECOMMENDATION SYSTEM
   ================================
   Professional recommendation UI
*/

/* Recommendation Cards */
.recommendation-card {
    background: var(--card-bg);
    border: var(--border-width) var(--border-style) var(--card-border);
    border-radius: var(--card-border-radius);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    transition: var(--transition-card);
    position: relative;
    overflow: hidden;
}

.recommendation-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-card-hover);
    border-color: var(--primary-200);
}

.recommendation-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    opacity: 0;
    transition: var(--transition-fade);
}

.recommendation-card.positive::before {
    background: var(--success);
    opacity: 1;
}

.recommendation-card.warning::before {
    background: var(--warning);
    opacity: 1;
}

.recommendation-card.negative::before {
    background: var(--danger);
    opacity: 1;
}

.recommendation-card.info::before {
    background: var(--info);
    opacity: 1;
}

/* Trend Indicators */
.trend-indicator {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--input-border-radius);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.trend-up {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success);
    border: 1px solid rgba(16, 185, 129, 0.2);
}

.trend-down {
    background: rgba(220, 38, 38, 0.1);
    color: var(--danger);
    border: 1px solid rgba(220, 38, 38, 0.2);
}

.trend-neutral {
    background: rgba(107, 114, 128, 0.1);
    color: var(--text-secondary);
    border: 1px solid rgba(107, 114, 128, 0.2);
}

.trend-icon {
    font-size: var(--font-size-sm);
}

/* Recommendation Types */
.recommendation-type {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.recommendation-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-lg);
    flex-shrink: 0;
}

.recommendation-icon.success {
    background: var(--success-light);
    color: var(--success);
}

.recommendation-icon.warning {
    background: var(--warning-light);
    color: var(--warning);
}

.recommendation-icon.danger {
    background: var(--danger-light);
    color: var(--danger);
}

.recommendation-icon.info {
    background: var(--info-light);
    color: var(--info);
}

.recommendation-title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
    margin: 0;
}

.recommendation-content {
    margin-top: var(--spacing-md);
    color: var(--text-secondary);
    line-height: var(--line-height-relaxed);
}

/* Pros and Cons Sections */
.pros-cons-section {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.pros-section,
.cons-section {
    padding: var(--spacing-md);
    border-radius: var(--input-border-radius);
}

.pros-section {
    background: rgba(16, 185, 129, 0.05);
    border: 1px solid rgba(16, 185, 129, 0.1);
}

.cons-section {
    background: rgba(220, 38, 38, 0.05);
    border: 1px solid rgba(220, 38, 38, 0.1);
}

.pros-cons-title {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.pros-cons-title.pros {
    color: var(--success);
}

.pros-cons-title.cons {
    color: var(--danger);
}

.pros-cons-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.pros-cons-list li {
    padding: var(--spacing-xs) 0;
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    position: relative;
    padding-left: var(--spacing-lg);
}

.pros-cons-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: var(--spacing-xs);
    width: 4px;
    height: 4px;
    border-radius: 50%;
}

.pros-section .pros-cons-list li::before {
    background: var(--success);
}

.cons-section .pros-cons-list li::before {
    background: var(--danger);
}

/* Action Items */
.recommendation-actions {
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-lg);
    border-top: var(--border-width) var(--border-style) var(--border-light);
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.recommendation-actions .btn {
    flex: 1;
    min-width: 120px;
}

/* Responsive Design for Recommendations */
@media (max-width: 768px) {
    .pros-cons-section {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .recommendation-actions {
        flex-direction: column;
    }
    
    .recommendation-actions .btn {
        width: 100%;
    }
    
    .recommendation-type {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-sm);
    }
    
    .recommendation-icon {
        width: 32px;
        height: 32px;
        font-size: var(--font-size-base);
    }
}

.nav-link.active::after {
    content: '';
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 70%;
    background: linear-gradient(180deg, var(--primary-color), var(--secondary-color));
    border-radius: 4px 0 0 4px;
    animation: activeGlow 2s ease-in-out infinite;
}

@keyframes activeGlow {
    0%, 100% { opacity: 0.6; }
    50% { opacity: 1; }
}

/* Navigation Icons */
.nav-icon {
    font-size: 1.125rem;
    width: 24px;
    text-align: center;
    transition: var(--transition);
    flex-shrink: 0;
}

.nav-link:hover .nav-icon {
    transform: scale(1.2) rotate(5deg);
    color: var(--primary-color);
}

.nav-link.active .nav-icon {
    color: var(--primary-color);
    transform: scale(1.1);
    animation: iconBounce 0.6s ease-out;
}

@keyframes iconBounce {
    0% { transform: scale(1); }
    50% { transform: scale(1.3); }
    100% { transform: scale(1.1); }
}

/* Navigation Text */
.nav-text {
    font-size: 0.9rem;
    font-weight: 600;
    letter-spacing: 0.2px;
    transition: var(--transition);
}

.nav-link:hover .nav-text {
    transform: translateX(2px);
}

/* Navigation Indicator */
.nav-indicator {
    position: absolute;
    right: var(--spacing-lg);
    top: 50%;
    transform: translateY(-50%);
    width: 6px;
    height: 6px;
    background: var(--primary-color);
    border-radius: 50%;
    opacity: 0;
    transition: var(--transition);
}

.nav-link.active .nav-indicator {
    opacity: 1;
    animation: indicatorPulse 2s ease-in-out infinite;
}

@keyframes indicatorPulse {
    0%, 100% { transform: translateY(-50%) scale(1); opacity: 0.6; }
    50% { transform: translateY(-50%) scale(1.5); opacity: 1; }
}

/* Special YouTube Icon Color */
.nav-link[data-page="youtube"] .nav-icon {
    color: #ff0000;
}

.nav-link[data-page="youtube"]:hover .nav-icon,
.nav-link[data-page="youtube"].active .nav-icon {
    color: #ff0000;
    filter: brightness(1.2);
}

/* Responsive Sidebar */
@media (max-width: 768px) {
    .sidebar {
        width: 100%;
        transform: translateX(-100%);
        position: fixed;
        z-index: 1000;
    }
    
    .sidebar.open {
        transform: translateX(0);
    }
}

/* Smooth transitions for all interactive elements */
.nav-link,
.nav-icon,
.nav-text,
.nav-indicator {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ========== ENHANCED BUTTON SYSTEM ========== */

.btn {
    background: var(--surface);
    border: var(--border-width) var(--border-style) var(--border-color);
    border-radius: var(--border-radius);
    font-weight: 600;
    padding: var(--spacing-md) var(--spacing-lg);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    text-decoration: none;
    color: var(--text-primary);
    box-shadow: var(--shadow-xs);
}

.btn:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.btn:active {
    transform: translateY(0);
    box-shadow: var(--shadow-xs);
}

.btn-primary {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-outline {
    background: transparent;
    color: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-outline:hover {
    background: var(--primary-color);
    color: white;
}

.btn-sm {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.875rem;
}

.btn-lg {
    padding: var(--spacing-lg) var(--spacing-xl);
    font-size: 1.125rem;
}

/* ========== UNIFIED FORM ELEMENTS ========== */

.form-control {
    background: var(--surface);
    border: var(--border-width) var(--border-style) var(--border-color);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    font-size: 0.875rem;
    transition: var(--transition);
    color: var(--text-primary);
    box-shadow: var(--shadow-xs);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1), var(--shadow-sm);
}

.form-label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.875rem;
}

.form-group {
    margin-bottom: var(--spacing-lg);
}

/* Bootstrap Form Overrides */
.form-control:hover {
    border-color: var(--primary-light);
}

.form-control:active {
    border-color: var(--primary);
}

.form-select {
    background: var(--surface);
    border: var(--border-width) var(--border-style) var(--border-color);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    font-size: 0.875rem;
    transition: var(--transition);
    color: var(--text-primary);
}

.form-select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

/* ========== ENHANCED TABLES ========== */

.table-container {
    background: var(--surface);
    border: var(--border-width) var(--border-style) var(--border-color);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-card);
    margin-bottom: var(--spacing-lg);
}

.table {
    margin: 0;
    border-collapse: collapse;
    width: 100%;
}

.table th {
    background: var(--gray-50);
    border-bottom: var(--border-width-lg) var(--border-style) var(--border-color);
    padding: var(--spacing-md) var(--spacing-lg);
    font-weight: 600;
    color: var(--text-primary);
    text-align: left;
}

.table td {
    border-bottom: var(--border-width) var(--border-style) var(--border-color-light);
    padding: var(--spacing-md) var(--spacing-lg);
    color: var(--text-secondary);
}

.table tbody tr:hover {
    background: var(--hover-color);
}

.table tbody tr:last-child td {
    border-bottom: none;
}

/* ========== ENHANCED ALERTS ========== */

.alert {
    border: var(--border-width) var(--border-style);
    border-radius: var(--border-radius);
    padding: var(--spacing-md) var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    position: relative;
    box-shadow: var(--shadow-xs);
}

.alert-primary {
    background: rgba(99, 102, 241, 0.05);
    border-color: var(--primary-color);
    color: var(--primary-dark);
}

.alert-success {
    background: rgba(16, 185, 129, 0.05);
    border-color: var(--success-color);
    color: var(--success-color);
}

.alert-warning {
    background: rgba(245, 158, 11, 0.05);
    border-color: var(--warning-color);
    color: var(--warning-color);
}

.alert-danger {
    background: rgba(239, 68, 68, 0.05);
    border-color: var(--danger-color);
    color: var(--danger-color);
}

/* ========== ENHANCED PROGRESS BARS ========== */

.progress {
    background: var(--gray-100);
    border: var(--border-width) var(--border-style) var(--border-color);
    border-radius: 50px;
    height: 8px;
    overflow: hidden;
    box-shadow: inset var(--shadow-xs);
}

.progress-bar {
    height: 100%;
    border-radius: 50px;
    transition: width 0.6s ease;
    position: relative;
    overflow: hidden;
}

.progress-bar::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    animation: progressShine 2s ease-in-out infinite;
}

@keyframes progressShine {
    0% { left: -100%; }
    100% { left: 100%; }
}

/* ========== ENHANCED BADGES ========== */

.badge {
    display: inline-flex;
    align-items: center;
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 50px;
    border: var(--border-width) transparent;
    box-shadow: var(--shadow-xs);
}

.badge-primary {
    background: var(--primary-color);
    color: white;
}

.badge-success {
    background: var(--success-color);
    color: white;
}

.badge-warning {
    background: var(--warning-color);
    color: white;
}

.badge-danger {
    background: var(--danger-color);
    color: white;
}

/* ========== ENHANCED RESPONSIVE DESIGN ========== */

/* Container Classes */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.container-fluid {
    width: 100%;
    padding: 0 var(--spacing-lg);
}

.container-sm {
    max-width: 640px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.container-md {
    max-width: 768px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.container-lg {
    max-width: 1024px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.container-xl {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* Responsive Grid */
@media (max-width: 640px) {
    .container, .container-fluid {
        padding: 0 var(--spacing-md);
    }
    
    .card-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .row .card {
        margin-bottom: var(--spacing-md);
    }
    
    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }
    h3 { font-size: 1.5rem; }
    h4 { font-size: 1.25rem; }
    h5 { font-size: 1.125rem; }
}

@media (max-width: 768px) {
    .card-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .sidebar {
        transform: translateX(-100%);
    }
    
    .sidebar.open {
        transform: translateX(0);
    }
}

@media (max-width: 1024px) {
    .card-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    }
}

/* Mobile Optimizations */
@media (max-width: 480px) {
    .container, .container-fluid {
        padding: 0 var(--spacing-sm);
    }
    
    .card {
        margin-bottom: var(--spacing-md);
    }
    
    .card-body {
        padding: var(--spacing-md);
    }
    
    .card-header {
        padding: var(--spacing-md);
    }
    
    .btn {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: 0.875rem;
    }
    
    .form-control {
        padding: var(--spacing-sm);
        font-size: 0.875rem;
    }
}

/* ========== UTILITY CLASSES ========== */

/* Display Utilities */
.d-none { display: none !important; }
.d-block { display: block !important; }
.d-inline { display: inline !important; }
.d-inline-block { display: inline-block !important; }
.d-flex { display: flex !important; }
.d-inline-flex { display: inline-flex !important; }
.d-grid { display: grid !important; }

/* Flex Utilities */
.flex-row { flex-direction: row; }
.flex-column { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.flex-nowrap { flex-wrap: nowrap; }

.justify-start { justify-content: flex-start; }
.justify-center { justify-content: center; }
.justify-end { justify-content: flex-end; }
.justify-between { justify-content: space-between; }
.justify-around { justify-content: space-around; }
.justify-evenly { justify-content: space-evenly; }

.items-start { align-items: flex-start; }
.items-center { align-items: center; }
.items-end { align-items: flex-end; }
.items-stretch { align-items: stretch; }

.flex-1 { flex: 1; }
.flex-auto { flex: auto; }
.flex-none { flex: none; }

/* Position Utilities */
.relative { position: relative; }
.absolute { position: absolute; }
.fixed { position: fixed; }
.sticky { position: sticky; }

/* Width Utilities */
.w-full { width: 100%; }
.w-half { width: 50%; }
.w-0 { width: 0; }
.w-auto { width: auto; }

/* Height Utilities */
.h-full { height: 100%; }
.h-screen { height: 100vh; }
.h-0 { height: 0; }
.h-auto { height: auto; }

/* Border Utilities */
.border { border: var(--border-width) var(--border-style) var(--border-color); }
.border-0 { border: none; }
.border-t { border-top: var(--border-width) var(--border-style) var(--border-color); }
.border-b { border-bottom: var(--border-width) var(--border-style) var(--border-color); }
.border-l { border-left: var(--border-width) var(--border-style) var(--border-color); }
.border-r { border-right: var(--border-width) var(--border-style) var(--border-color); }

.rounded { border-radius: var(--border-radius); }
.rounded-sm { border-radius: var(--border-radius-sm); }
.rounded-lg { border-radius: var(--border-radius-lg); }
.rounded-xl { border-radius: var(--border-radius-xl); }
.rounded-full { border-radius: 50%; }

/* Shadow Utilities */
.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }
.shadow-xl { box-shadow: var(--shadow-xl); }
.shadow-none { box-shadow: none; }

/* Overflow Utilities */
.overflow-hidden { overflow: hidden; }
.overflow-visible { overflow: visible; }
.overflow-scroll { overflow: scroll; }
.overflow-auto { overflow: auto; }

/* Text Alignment */
.text-left { text-align: left; }
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-justify { text-align: justify; }

/* Transform Utilities */
.transform { transform: translateZ(0); }
.scale-95 { transform: scale(0.95); }
.scale-100 { transform: scale(1); }
.scale-105 { transform: scale(1.05); }

/* Transition Utilities */
.transition { transition: var(--transition); }
.transition-none { transition: none; }

/* Cursor Utilities */
.cursor-pointer { cursor: pointer; }
.cursor-default { cursor: default; }
.cursor-not-allowed { cursor: not-allowed; }

/* User Select */
.select-none { user-select: none; }
.select-text { user-select: text; }
.select-all { user-select: all; }

/* ========== ENHANCED COMPONENT SYSTEM ========== */

/* Button Component Enhancements */
.btn-icon-only {
    width: 2.5rem;
    height: 2.5rem;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}

.btn-icon-only.btn-sm {
    width: 2rem;
    height: 2rem;
}

.btn-icon-only.btn-lg {
    width: 3rem;
    height: 3rem;
}

.btn-loading {
    pointer-events: none;
    opacity: 0.7;
}

.btn-fab {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 3.5rem;
    height: 3.5rem;
    border-radius: 50%;
    box-shadow: var(--shadow-xl);
    z-index: 1000;
}

.btn-fab:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-2xl);
}

.btn-block {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Social Button Styles */
.btn-social {
    border: none;
    color: white;
    font-weight: 500;
    transition: var(--transition);
}

.btn-facebook {
    background: #1877f2;
}

.btn-facebook:hover {
    background: #166fe5;
    transform: translateY(-1px);
}

.btn-twitter {
    background: #1da1f2;
}

.btn-twitter:hover {
    background: #1a91da;
    transform: translateY(-1px);
}

.btn-google {
    background: #ea4335;
}

.btn-google:hover {
    background: #d23321;
    transform: translateY(-1px);
}

.btn-github {
    background: #333;
}

.btn-github:hover {
    background: #24292e;
    transform: translateY(-1px);
}

/* Card Component Enhancements */
.card-interactive {
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.card-interactive:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.card-compact {
    border-radius: var(--border-radius-sm);
    padding: var(--spacing-md);
}

.card-compact .card-body {
    padding: 0;
}

.bg-gradient-primary {
    background: var(--gradient-primary);
}

.icon-box {
    width: 48px;
    height: 48px;
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary-color);
}

.metric-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

/* Input Component Enhancements */
.input-group {
    position: relative;
    display: flex;
    align-items: stretch;
    width: 100%;
}

.input-group-text {
    background: var(--gray-50);
    border: var(--border-width) var(--border-style) var(--border-color);
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.form-control-sm {
    padding: var(--spacing-sm);
    font-size: 0.875rem;
}

.form-control-lg {
    padding: var(--spacing-lg);
    font-size: 1.125rem;
}

.form-control:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-control.is-valid {
    border-color: var(--success-color);
}

.form-control.is-invalid {
    border-color: var(--danger-color);
}

.valid-feedback {
    color: var(--success-color);
    font-size: 0.875rem;
    margin-top: var(--spacing-xs);
}

.invalid-feedback {
    color: var(--danger-color);
    font-size: 0.875rem;
    margin-top: var(--spacing-xs);
}

.password-strength {
    opacity: 0;
    transition: opacity 0.3s ease;
}

.password-strength.show {
    opacity: 1;
}

.char-count {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.file-info {
    padding: var(--spacing-sm);
    background: var(--gray-50);
    border-radius: var(--border-radius);
    border: var(--border-width) var(--border-style) var(--border-color);
}

/* Dropdown Component Enhancements */
.dropdown-menu-lg {
    min-width: 320px;
    max-width: 400px;
}

.dropdown-menu-dark {
    background: var(--dark-surface);
    border-color: var(--dark-border-color);
}

.dropdown-menu-dark .dropdown-header {
    color: var(--dark-text-secondary);
}

.dropdown-menu-dark .dropdown-item {
    color: var(--dark-text-primary);
}

.dropdown-menu-dark .dropdown-item:hover {
    background: var(--dark-hover-color);
    color: white;
}

.dropdown-menu-dark .dropdown-divider {
    border-color: var(--dark-border-color);
}

/* Loader Component Styles */
.dots-loader {
    display: flex;
    gap: 0.25rem;
}

.dots-loader .dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--primary-color);
    animation: dotPulse 1.5s ease-in-out infinite;
}

.dots-loader .dot:nth-child(1) { animation-delay: 0s; }
.dots-loader .dot:nth-child(2) { animation-delay: 0.2s; }
.dots-loader .dot:nth-child(3) { animation-delay: 0.4s; }

@keyframes dotPulse {
    0%, 60%, 100% {
        transform: scale(1);
        opacity: 1;
    }
    30% {
        transform: scale(1.5);
        opacity: 0.5;
    }
}

.pulse-loader {
    position: relative;
    width: 40px;
    height: 40px;
}

.pulse-loader .pulse-dot {
    width: 100%;
    height: 100%;
    background: var(--primary-color);
    border-radius: 50%;
    animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
    0% {
        transform: scale(0);
        opacity: 1;
    }
    100% {
        transform: scale(2);
        opacity: 0;
    }
}

/* Skeleton Loader Styles */
.skeleton-loader {
    animation: skeletonShimmer 2s ease-in-out infinite;
}

.skeleton-line {
    height: 12px;
    background: linear-gradient(90deg, var(--gray-200) 25%, var(--gray-100) 50%, var(--gray-200) 75%);
    background-size: 200% 100%;
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-sm);
    animation: skeletonShimmer 1.5s ease-in-out infinite;
}

.skeleton-title {
    height: 20px;
    width: 60%;
}

.skeleton-text {
    width: 100%;
}

.skeleton-text.skeleton-short {
    width: 40%;
}

.skeleton-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(90deg, var(--gray-200) 25%, var(--gray-100) 50%, var(--gray-200) 75%);
    background-size: 200% 100%;
    animation: skeletonShimmer 1.5s ease-in-out infinite;
}

@keyframes skeletonShimmer {
    0% {
        background-position: -200% 0;
    }
    100% {
        background-position: 200% 0;
    }
}

/* Progress Loader Styles */
.progress-loader {
    padding: var(--spacing-lg);
    background: var(--surface);
    border-radius: var(--border-radius);
    border: var(--border-width) var(--border-style) var(--border-color);
}

/* Bars Loader */
.bars-loader {
    display: flex;
    gap: 0.25rem;
    align-items: flex-end;
    height: 32px;
}

.bars-loader .bar {
    width: 4px;
    background: var(--primary-color);
    border-radius: 2px;
    animation: barGrow 1.2s ease-in-out infinite;
}

.bars-loader .bar:nth-child(1) { animation-delay: 0s; height: 20px; }
.bars-loader .bar:nth-child(2) { animation-delay: 0.1s; height: 24px; }
.bars-loader .bar:nth-child(3) { animation-delay: 0.2s; height: 16px; }
.bars-loader .bar:nth-child(4) { animation-delay: 0.3s; height: 28px; }
.bars-loader .bar:nth-child(5) { animation-delay: 0.4s; height: 12px; }

@keyframes barGrow {
    0%, 80%, 100% {
        transform: scaleY(0.5);
        opacity: 0.5;
    }
    40% {
        transform: scaleY(1);
        opacity: 1;
    }
}

/* Circle Loader */
.circle-loader {
    position: relative;
    width: 40px;
    height: 40px;
}

.circle-loader .circle {
    width: 100%;
    height: 100%;
    border: 3px solid var(--gray-200);
    border-top: 3px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

/* Square Loader */
.square-loader {
    position: relative;
    width: 32px;
    height: 32px;
}

.square-loader .square {
    width: 100%;
    height: 100%;
    background: var(--primary-color);
    animation: squareRotate 1.5s ease-in-out infinite;
}

@keyframes squareRotate {
    0% {
        transform: rotate(0deg);
        border-radius: 0;
    }
    50% {
        transform: rotate(180deg);
        border-radius: 50%;
    }
    100% {
        transform: rotate(360deg);
        border-radius: 0;
    }
}

/* Hexagon Loader */
.hexagon-loader {
    position: relative;
    width: 40px;
    height: 40px;
}

.hexagon-loader .hexagon {
    width: 100%;
    height: 100%;
    background: var(--primary-color);
    clip-path: polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
    animation: hexagonSpin 2s linear infinite;
}

@keyframes hexagonSpin {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

/* Heartbeat Loader */
.heartbeat-loader i {
    font-size: 2rem;
    color: var(--danger-color);
    animation: heartbeat 1.5s ease-in-out infinite;
}

@keyframes heartbeat {
    0%, 100% {
        transform: scale(1);
    }
    10%, 30% {
        transform: scale(1.1);
    }
    20% {
        transform: scale(1.2);
    }
}

/* Clock Loader */
.clock-loader i {
    font-size: 2rem;
    color: var(--primary-color);
    animation: clockRotate 2s linear infinite;
}

@keyframes clockRotate {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

/* Gear Loader */
.gear-loader i {
    font-size: 2rem;
    color: var(--text-secondary);
    animation: gearRotate 3s linear infinite;
}

@keyframes gearRotate {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

/* Infinity Loader */
.infinity-loader {
    position: relative;
    width: 60px;
    height: 30px;
}

.infinity-loader .infinity {
    width: 100%;
    height: 100%;
    border: 3px solid var(--primary-color);
    border-radius: 50%;
    animation: infinity 2s ease-in-out infinite;
}

@keyframes infinity {
    0%, 100% {
        transform: rotate(0deg) scale(1);
    }
    50% {
        transform: rotate(180deg) scale(1.2);
    }
}

/* Wave Loader */
.wave-loader {
    display: flex;
    gap: 0.25rem;
    align-items: center;
}

.wave-loader .wave {
    width: 4px;
    height: 20px;
    background: var(--primary-color);
    border-radius: 2px;
    animation: wave 1.2s ease-in-out infinite;
}

.wave-loader .wave:nth-child(1) { animation-delay: 0s; }
.wave-loader .wave:nth-child(2) { animation-delay: 0.1s; }
.wave-loader .wave:nth-child(3) { animation-delay: 0.2s; }
.wave-loader .wave:nth-child(4) { animation-delay: 0.3s; }
.wave-loader .wave:nth-child(5) { animation-delay: 0.4s; }

@keyframes wave {
    0%, 40%, 100% {
        transform: scaleY(0.4);
    }
    20% {
        transform: scaleY(1);
    }
}

/* Bounce Loader */
.bounce-loader {
    display: flex;
    gap: 0.5rem;
}

.bounce-loader .bounce-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--primary-color);
    animation: bounce 1.4s ease-in-out infinite both;
}

.bounce-loader .bounce-dot:nth-child(1) { animation-delay: -0.32s; }
.bounce-loader .bounce-dot:nth-child(2) { animation-delay: -0.16s; }
.bounce-loader .bounce-dot:nth-child(3) { animation-delay: 0s; }

@keyframes bounce {
    0%, 80%, 100% {
        transform: scale(0);
    }
    40% {
        transform: scale(1);
    }
}

/* Rotating Squares Loader */
.rotating-squares-loader {
    position: relative;
    width: 40px;
    height: 40px;
}

.rotating-squares-loader .square-1,
.rotating-squares-loader .square-2,
.rotating-squares-loader .square-3 {
    position: absolute;
    width: 12px;
    height: 12px;
    background: var(--primary-color);
    border-radius: 2px;
}

.rotating-squares-loader .square-1 {
    animation: square1 2s ease-in-out infinite;
}

.rotating-squares-loader .square-2 {
    animation: square2 2s ease-in-out infinite;
}

.rotating-squares-loader .square-3 {
    animation: square3 2s ease-in-out infinite;
}

@keyframes square1 {
    0% { transform: translate(0, 0); }
    25% { transform: translate(14px, 0); }
    50% { transform: translate(14px, 14px); }
    75% { transform: translate(0, 14px); }
    100% { transform: translate(0, 0); }
}

@keyframes square2 {
    0% { transform: translate(14px, 0); }
    25% { transform: translate(14px, 14px); }
    50% { transform: translate(0, 14px); }
    75% { transform: translate(0, 0); }
    100% { transform: translate(14px, 0); }
}

@keyframes square3 {
    0% { transform: translate(14px, 14px); }
    25% { transform: translate(0, 14px); }
    50% { transform: translate(0, 0); }
    75% { transform: translate(14px, 0); }
    100% { transform: translate(14px, 14px); }
}

/* Loader Overlay */
.loader-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    backdrop-filter: blur(2px);
}

.loader-overlay-content {
    background: var(--surface);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius-lg);
    text-align: center;
    box-shadow: var(--shadow-xl);
}

/* Loading State Utilities */
.loading {
    position: relative;
    pointer-events: none;
    opacity: 0.6;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid var(--gray-200);
    border-top: 2px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Empty State Styles */
.empty-state-icon {
    opacity: 0.5;
    transition: opacity 0.3s ease;
}

.empty-state-icon:hover {
    opacity: 0.8;
}

/* Component State Classes */
.disabled {
    opacity: 0.5;
    pointer-events: none;
    cursor: not-allowed;
}

.active {
    background: var(--primary-color);
    color: white;
}

.selected {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.2);
}

/* Responsive Component Adjustments */
@media (max-width: 768px) {
    .btn-fab {
        bottom: 1rem;
        right: 1rem;
        width: 3rem;
        height: 3rem;
    }
    
    .dropdown-menu-lg {
        min-width: 280px;
        max-width: calc(100vw - 2rem);
    }
    
    .card-interactive {
        margin-bottom: var(--spacing-md);
    }
}

/* Container Classes */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.container-fluid {
    width: 100%;
    padding: 0 var(--spacing-lg);
}

.container-sm {
    max-width: 640px;
}

.container-md {
    max-width: 768px;
}

.container-lg {
    max-width: 1024px;
}

.container-xl {
    max-width: 1280px;
}

/* Layout Utility Classes */
.flex {
    display: flex;
}

.flex-col {
    flex-direction: column;
}

.flex-wrap {
    flex-wrap: wrap;
}

.items-center {
    align-items: center;
}

.items-start {
    align-items: flex-start;
}

.items-end {
    align-items: flex-end;
}

.justify-center {
    justify-content: center;
}

.justify-between {
    justify-content: space-between;
}

.justify-end {
    justify-content: flex-end;
}

.gap-xs { gap: var(--spacing-xs); }
.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }
.gap-lg { gap: var(--spacing-lg); }
.gap-xl { gap: var(--spacing-xl); }

/* Spacing Utility Classes */
.m-0 { margin: 0; }
.m-1 { margin: var(--spacing-xs); }
.m-2 { margin: var(--spacing-sm); }
.m-3 { margin: var(--spacing-md); }
.m-4 { margin: var(--spacing-lg); }
.m-5 { margin: var(--spacing-xl); }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }
.mt-5 { margin-top: var(--spacing-xl); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }
.mb-5 { margin-bottom: var(--spacing-xl); }

.ml-0 { margin-left: 0; }
.ml-1 { margin-left: var(--spacing-xs); }
.ml-2 { margin-left: var(--spacing-sm); }
.ml-3 { margin-left: var(--spacing-md); }
.ml-4 { margin-left: var(--spacing-lg); }
.ml-5 { margin-left: var(--spacing-xl); }

.mr-0 { margin-right: 0; }
.mr-1 { margin-right: var(--spacing-xs); }
.mr-2 { margin-right: var(--spacing-sm); }
.mr-3 { margin-right: var(--spacing-md); }
.mr-4 { margin-right: var(--spacing-lg); }
.mr-5 { margin-right: var(--spacing-xl); }

.p-0 { padding: 0; }
.p-1 { padding: var(--spacing-xs); }
.p-2 { padding: var(--spacing-sm); }
.p-3 { padding: var(--spacing-md); }
.p-4 { padding: var(--spacing-lg); }
.p-5 { padding: var(--spacing-xl); }

.pt-0 { padding-top: 0; }
.pt-1 { padding-top: var(--spacing-xs); }
.pt-2 { padding-top: var(--spacing-sm); }
.pt-3 { padding-top: var(--spacing-md); }
.pt-4 { padding-top: var(--spacing-lg); }
.pt-5 { padding-top: var(--spacing-xl); }

.pb-0 { padding-bottom: 0; }
.pb-1 { padding-bottom: var(--spacing-xs); }
.pb-2 { padding-bottom: var(--spacing-sm); }
.pb-3 { padding-bottom: var(--spacing-md); }
.pb-4 { padding-bottom: var(--spacing-lg); }
.pb-5 { padding-bottom: var(--spacing-xl); }

.pl-0 { padding-left: 0; }
.pl-1 { padding-left: var(--spacing-xs); }
.pl-2 { padding-left: var(--spacing-sm); }
.pl-3 { padding-left: var(--spacing-md); }
.pl-4 { padding-left: var(--spacing-lg); }
.pl-5 { padding-left: var(--spacing-xl); }

.pr-0 { padding-right: 0; }
.pr-1 { padding-right: var(--spacing-xs); }
.pr-2 { padding-right: var(--spacing-sm); }
.pr-3 { padding-right: var(--spacing-md); }
.pr-4 { padding-right: var(--spacing-lg); }
.pr-5 { padding-right: var(--spacing-xl); }

/* Text Utility Classes */
.text-xs { font-size: 0.75rem; }
.text-sm { font-size: 0.875rem; }
.text-base { font-size: 1rem; }
.text-lg { font-size: 1.125rem; }
.text-xl { font-size: 1.25rem; }
.text-2xl { font-size: 1.5rem; }
.text-3xl { font-size: 1.875rem; }
.text-4xl { font-size: 2.25rem; }

.font-light { font-weight: 300; }
.font-normal { font-weight: 400; }
.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }
.font-extrabold { font-weight: 800; }

.text-left { text-align: left; }
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-justify { text-align: justify; }

.text-primary { color: var(--primary-color); }
.text-secondary { color: var(--secondary-color); }
.text-success { color: var(--success-color); }
.text-warning { color: var(--warning-color); }
.text-danger { color: var(--danger-color); }
.text-muted { color: var(--text-secondary); }

/* Display Utility Classes */
.block { display: block; }
.inline-block { display: inline-block; }
.inline { display: inline; }
.hidden { display: none; }

/* Position Utility Classes */
.relative { position: relative; }
.absolute { position: absolute; }
.fixed { position: fixed; }
.sticky { position: sticky; }

/* Width Utility Classes */
.w-auto { width: auto; }
.w-full { width: 100%; }
.w-half { width: 50%; }
.w-third { width: 33.333333%; }
.w-two-thirds { width: 66.666667%; }
.w-quarter { width: 25%; }
.w-three-quarters { width: 75%; }
.w-0 { width: 0; }

/* Height Utility Classes */
.h-auto { height: auto; }
.h-full { height: 100%; }
.h-screen { height: 100vh; }

/* Border Utility Classes */
.border { border: var(--border-width) var(--border-style) var(--border-color); }
.border-0 { border: none; }
.border-t { border-top: var(--border-width) var(--border-style) var(--border-color); }
.border-b { border-bottom: var(--border-width) var(--border-style) var(--border-color); }
.border-l { border-left: var(--border-width) var(--border-style) var(--border-color); }
.border-r { border-right: var(--border-width) var(--border-style) var(--border-color); }

.rounded { border-radius: var(--border-radius); }
.rounded-sm { border-radius: calc(var(--border-radius) * 0.5); }
.rounded-lg { border-radius: var(--border-radius-lg); }
.rounded-xl { border-radius: var(--border-radius-xl); }
.rounded-full { border-radius: 50%; }

/* Shadow Utility Classes */
.shadow-none { box-shadow: none; }
.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }
.shadow-xl { box-shadow: var(--shadow-xl); }

/* Loading States */
.loading {
    opacity: 0.6;
    pointer-events: none;
}

.loading-spinner {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--border-color);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Chart Container */
.chart-container {
    position: relative;
    height: 400px;
    background: var(--surface);
    border: var(--border-width) var(--border-style) var(--border-color);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

/* Page Header */
.page-header {
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-lg);
    border-bottom: var(--border-width) var(--border-style) var(--border-color);
}

.page-header h1 {
    color: var(--text-primary);
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.page-header p {
    color: var(--text-secondary);
    font-size: 1rem;
    margin: 0;
}

/* Input Group Enhancements */
.input-group {
    display: flex;
    align-items: stretch;
}

.input-group .form-control {
    flex: 1;
    border-top-right-radius: 0;
    border-bottom-right-radius: 0;
    border-right: none;
}

.input-group .form-select {
    border-top-left-radius: 0;
    border-bottom-left-radius: 0;
    border-left: none;
    max-width: 120px;
}

.input-group .form-control:focus,
.input-group .form-select:focus {
    z-index: 1;
}

/* Model Selection Styles */
.model-selection-container {
    border: var(--border-width) var(--border-style) var(--border-color);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    background: var(--surface);
}

.model-select-all {
    padding-bottom: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    border-bottom: var(--border-width) var(--border-style) var(--border-color-light);
}

.model-checkboxes {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.model-checkbox {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.model-checkbox:hover {
    background: var(--hover-color);
}

.model-name {
    font-weight: 600;
    color: var(--text-primary);
}

.model-description {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-left: auto;
}

.selected-count {
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: var(--border-width) var(--border-style) var(--border-color);
    text-align: center;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* Chart Controls */
.chart-controls {
    display: flex;
    gap: var(--spacing-sm);
}

.chart-controls .btn-group {
    display: flex;
    border-radius: var(--border-radius);
    overflow: hidden;
}

.chart-controls .btn-group .btn {
    border-radius: 0;
    border-right: none;
    font-size: 0.875rem;
    padding: var(--spacing-sm) var(--spacing-md);
}

.chart-controls .btn-group .btn:last-child {
    border-right: var(--border-width) var(--border-style) var(--border-color);
}

.chart-controls .btn-group .btn.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* Best Model Highlight */
.best-model-highlight .alert {
    margin-bottom: 0;
    border-left: 4px solid var(--success-color);
}

/* Component Loading Overlay */
.component-loading-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
    border-radius: var(--border-radius);
}

.loading-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
}

.loading-content .spinner {
    width: 24px;
    height: 24px;
    border-width: 2px;
}

.loading-text {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* Form Text */
.form-text {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-top: var(--spacing-xs);
}

/* Responsive Helpers */
.d-none { display: none !important; }
.d-block { display: block !important; }
.d-flex { display: flex !important; }
.d-inline { display: inline !important; }
.d-inline-block { display: inline-block !important; }

@media (max-width: 576px) {
    .d-sm-none { display: none !important; }
    .d-sm-block { display: block !important; }
    .d-sm-flex { display: flex !important; }
}

@media (max-width: 768px) {
    .d-md-none { display: none !important; }
    .d-md-block { display: block !important; }
    .d-md-flex { display: flex !important; }
}

@media (max-width: 992px) {
    .d-lg-none { display: none !important; }
    .d-lg-block { display: block !important; }
    .d-lg-flex { display: flex !important; }
}

@media (max-width: 1200px) {
    .d-xl-none { display: none !important; }
    .d-xl-block { display: block !important; }
    .d-xl-flex { display: flex !important; }
}

/* Enhanced Buttons with Micro-interactions */
.btn {
    background: var(--surface);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-weight: 600;
    padding: 0.75rem 1.5rem;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    text-decoration: none;
    color: var(--text-primary);
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s ease, height 0.6s ease;
}

.btn:active::before {
    width: 300px;
    height: 300px;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    background: var(--surface); /* IMPORTANT: Keep consistent background */
    border-color: var(--border-color); /* IMPORTANT: Maintain visible border */
    color: var(--text-primary); /* IMPORTANT: Maintain text readability */
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    border: none;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
    position: relative;
    overflow: hidden;
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-dark), #4338ca);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(99, 102, 241, 0.4);
    color: white;
}

.btn-primary:active {
    transform: translateY(0) scale(0.98);
    transition: all 0.1s ease;
}

/* ========== LAYOUT IMPROVEMENTS ========== */

/* Main Layout Container */
.dashboard-container {
    display: flex;
    min-height: 100vh;
    background: var(--background);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

/* Main Content Area */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: var(--background);
    overflow-x: hidden;
}

/* Content Area with Proper Spacing */
.content-area {
    padding: var(--spacing-xl);
    background: var(--background);
    min-height: calc(100vh - 80px);
}

/* Top Bar Improvements */
.top-bar {
    background: var(--surface);
    border-bottom: var(--border-width) var(--border-style) var(--border-color);
    padding: var(--spacing-md) var(--spacing-xl);
    box-shadow: var(--shadow-xs);
    position: sticky;
    top: 0;
    z-index: 100;
}

/* Page Title */
.page-title {
    font-size: 1.875rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
    line-height: 1.2;
}

/* ========== BREADCRUMB ENHANCEMENTS ========== */

.breadcrumb-container {
    background: var(--surface);
    border: var(--border-width) var(--border-style) var(--border-color);
    border-radius: var(--border-radius);
    padding: var(--spacing-md) var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow-xs);
}

.breadcrumb {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin: 0;
    padding: 0;
    list-style: none;
    font-size: 0.875rem;
}

.breadcrumb-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--text-secondary);
    font-weight: 500;
}

.breadcrumb-item a {
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius);
}

.breadcrumb-item a:hover {
    background: var(--hover-color);
    color: var(--primary-dark);
}

.breadcrumb-item.active {
    color: var(--text-secondary);
    font-weight: 600;
}

.breadcrumb-separator {
    color: var(--gray-400);
    font-size: 0.75rem;
}

/* ========== QUICK ACTIONS GRID ========== */

.quick-actions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.quick-action-btn {
    background: var(--surface);
    border: var(--border-width) var(--border-style) var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    font-weight: 600;
    color: var(--text-primary);
    text-decoration: none;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-xs);
}

.quick-action-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-card-hover);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.quick-action-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(99, 102, 241, 0.1), transparent);
    transition: left 0.6s ease;
}

.quick-action-btn:hover::before {
    left: 100%;
}

.quick-action-btn i {
    font-size: 1.25rem;
    color: var(--primary-color);
    transition: var(--transition);
}

.quick-action-btn:hover i {
    transform: scale(1.1);
}

/* ========== ACTIVITY FEED ENHANCEMENTS ========== */

.activity-list {
    max-height: 400px;
    overflow-y: auto;
    padding-right: var(--spacing-sm);
}

.activity-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    border: var(--border-width) var(--border-style) var(--border-color);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-md);
    background: var(--surface);
    transition: var(--transition);
    box-shadow: var(--shadow-xs);
}

.activity-item:hover {
    transform: translateX(4px);
    box-shadow: var(--shadow-sm);
    border-color: var(--primary-color);
}

.activity-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--hover-color);
    flex-shrink: 0;
    font-size: 1rem;
    color: var(--primary-color);
}

.activity-content {
    flex: 1;
    min-width: 0;
}

.activity-title {
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.activity-description {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
    line-height: 1.4;
}

.activity-time {
    font-size: 0.75rem;
    color: var(--gray-500);
}

/* ========== SYSTEM STATUS ENHANCEMENTS ========== */

.status-item {
    padding: var(--spacing-md);
    border: var(--border-width) var(--border-style) var(--border-color);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-md);
    background: var(--surface);
    transition: var(--transition);
    box-shadow: var(--shadow-xs);
}

.status-item:hover {
    border-color: var(--gray-300);
    box-shadow: var(--shadow-sm);
}

.status-indicator {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-sm);
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    display: inline-block;
    margin-right: var(--spacing-sm);
}

.status-dot.online {
    background: var(--success-color);
    box-shadow: 0 0 0 2px rgba(16, 185, 129, 0.2);
}

.status-dot.offline {
    background: var(--danger-color);
    box-shadow: 0 0 0 2px rgba(239, 68, 68, 0.2);
}

.status-dot.warning {
    background: var(--warning-color);
    box-shadow: 0 0 0 2px rgba(245, 158, 11, 0.2);
}

/* ========== ENHANCED CHART STYLING ========== */

.chart-container {
    background: var(--surface);
    border: var(--border-width) var(--border-style) var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-card);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    margin-bottom: var(--spacing-lg);
}

.chart-container:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-card-hover);
    border-color: var(--primary-color);
}

.chart-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    opacity: 0;
    transition: opacity 0.3s ease;
}

.chart-container:hover::before {
    opacity: 1;
}

/* Enhanced Chart Canvas Styling */
.chart-container canvas {
    max-height: 400px;
    transition: var(--transition);
}

.chart-container:hover canvas {
    transform: scale(1.02);
}

/* Enhanced Tooltips */
.enhanced-chart-tooltip {
    background: linear-gradient(135deg, rgba(15, 23, 42, 0.95) 0%, rgba(30, 41, 59, 0.95) 100%) !important;
    backdrop-filter: blur(12px) !important;
    border: 1px solid rgba(148, 163, 184, 0.2) !important;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04) !important;
    border-radius: 12px !important;
    font-family: 'Inter', sans-serif !important;
}

/* Chart Loading Animation */
.chart-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 300px;
    gap: var(--spacing-md);
    color: var(--text-secondary);
    background: linear-gradient(135deg, var(--gray-50) 0%, var(--surface) 100%);
    border-radius: var(--border-radius-lg);
    border: var(--border-width) var(--border-style) var(--border-color);
}

.chart-loading::before {
    content: '';
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-color);
    border-top: 3px solid var(--primary-color);
    border-radius: 50%;
    animation: chartSpin 1s linear infinite;
}

@keyframes chartSpin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Chart Legend Enhancement */
.chart-legend-enhanced {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--gray-50);
    border-radius: var(--border-radius);
    border: var(--border-width) var(--border-style) var(--border-color);
    margin-top: var(--spacing-md);
}

.chart-legend-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius);
    transition: var(--transition);
    cursor: pointer;
}

.chart-legend-item:hover {
    background: var(--hover-color);
    color: var(--primary-color);
}

.chart-legend-color {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    border: 2px solid var(--surface);
    box-shadow: var(--shadow-xs);
}

/* Chart Grid Enhancement */
.chart-grid-enhanced {
    stroke: var(--border-color-light);
    stroke-dasharray: 2, 2;
    opacity: 0.5;
}

/* Chart Point Animation */
.chart-point-animated {
    animation: chartPulse 2s ease-in-out infinite;
}

@keyframes chartPulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.2); opacity: 0.8; }
}

/* Chart Responsive Design */
@media (max-width: 768px) {
    .chart-container {
        padding: var(--spacing-md);
        margin-bottom: var(--spacing-md);
    }
    
    .chart-container canvas {
        max-height: 250px;
    }
    
    .chart-legend-enhanced {
        gap: var(--spacing-sm);
        padding: var(--spacing-sm);
    }
    
    .chart-legend-item {
        font-size: 0.75rem;
        padding: var(--spacing-xs);
    }
}

/* Chart Theme Variations */
.chart-container-dark {
    background: var(--gray-800);
    border-color: var(--gray-700);
    color: var(--gray-100);
}

.chart-container-dark .chart-legend-enhanced {
    background: var(--gray-700);
    border-color: var(--gray-600);
}

.chart-container-dark .chart-legend-item {
    color: var(--gray-300);
}

.chart-container-dark .chart-legend-item:hover {
    background: var(--gray-600);
    color: var(--primary-color);
}

/* Chart Animation Classes */
.chart-fade-in {
    animation: chartFadeIn 0.6s ease-out;
}

@keyframes chartFadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.chart-slide-up {
    animation: chartSlideUp 0.8s ease-out;
}

@keyframes chartSlideUp {
    from { opacity: 0; transform: translateY(40px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Chart Error State */
.chart-error {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 300px;
    gap: var(--spacing-md);
    color: var(--danger-color);
    background: rgba(239, 68, 68, 0.05);
    border: 2px dashed var(--danger-color);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
}

.chart-error::before {
    content: '⚠️';
    font-size: 3rem;
    opacity: 0.5;
}

/* Chart Success State */
.chart-success {
    border-color: var(--success-color);
    box-shadow: 0 0 0 1px rgba(16, 185, 129, 0.1), var(--shadow-card);
}

.chart-success:hover {
    box-shadow: 0 0 0 1px rgba(16, 185, 129, 0.2), var(--shadow-card-hover);
}

/* ========== SKELETON LOADERS ========== */

.skeleton {
    background: linear-gradient(90deg, 
        var(--gray-100) 25%, 
        var(--gray-200) 50%, 
        var(--gray-100) 75%
    );
    background-size: 200% 100%;
    animation: skeletonLoading 1.5s ease-in-out infinite;
    border-radius: var(--border-radius);
    border: var(--border-width) var(--border-style) var(--border-color-light);
}

@keyframes skeletonLoading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

.skeleton-activity {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    border: var(--border-width) var(--border-style) var(--border-color);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-md);
}

.skeleton-activity-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--border-radius);
    flex-shrink: 0;
}

.skeleton-activity-content {
    flex: 1;
}

.skeleton-text {
    height: 1rem;
    margin-bottom: var(--spacing-sm);
    border-radius: var(--border-radius);
}

.skeleton-text.small {
    height: 0.75rem;
    width: 80%;
}

/* ========== RESPONSIVE DESIGN ========== */

@media (max-width: 1200px) {
    .quick-actions-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .content-area {
        padding: var(--spacing-md);
    }
    
    .quick-actions-grid {
        grid-template-columns: 1fr;
    }
    
    .page-title {
        font-size: 1.5rem;
    }
    
    .card-body {
        padding: var(--spacing-md);
    }
    
    .chart-container {
        padding: var(--spacing-md);
    }
}

@media (max-width: 480px) {
    .content-area {
        padding: var(--spacing-sm);
    }
    
    .breadcrumb-container {
        padding: var(--spacing-sm) var(--spacing-md);
    }
    
    .quick-action-btn {
        padding: var(--spacing-md);
    }
}

/* ========== UTILITY CLASSES ========== */

.border-top {
    border-top: var(--border-width) var(--border-style) var(--border-color);
}

.border-bottom {
    border-bottom: var(--border-width) var(--border-style) var(--border-color);
}

.border-left {
    border-left: var(--border-width) var(--border-style) var(--border-color);
}

.border-right {
    border-right: var(--border-width) var(--border-style) var(--border-color);
}

.shadow-none {
    box-shadow: none !important;
}

.shadow-sm {
    box-shadow: var(--shadow-sm) !important;
}

.shadow-md {
    box-shadow: var(--shadow-md) !important;
}

.shadow-lg {
    box-shadow: var(--shadow-lg) !important;
}

.rounded {
    border-radius: var(--border-radius) !important;
}

.rounded-lg {
    border-radius: var(--border-radius-lg) !important;
}

.rounded-xl {
    border-radius: var(--border-radius-xl) !important;
}

.text-primary {
    color: var(--text-primary) !important;
}

.text-secondary {
    color: var(--text-secondary) !important;
}

.bg-surface {
    background: var(--surface) !important;
}

.bg-section {
    background: var(--section-bg) !important;
}

/* Dark mode support */
[data-theme="dark"] .navbar {
    background: rgba(17, 24, 39, 0.95);
    border-color: rgba(55, 65, 81, 0.8);
}

[data-theme="dark"] .navbar.scrolled {
    background: rgba(17, 24, 39, 0.98);
    border-color: rgba(55, 65, 81, 1);
}

[data-theme="dark"] .sidebar {
    background: rgba(17, 24, 39, 0.95);
    border-color: rgba(55, 65, 81, 0.8);
}

[data-theme="dark"] .sidebar-menu-link {
    color: var(--gray-300);
}

[data-theme="dark"] .sidebar-menu-link:hover {
    background: rgba(99, 102, 241, 0.15);
    color: var(--primary-light);
}

[data-theme="dark"] .sidebar-menu-link.active {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.15), rgba(139, 92, 246, 0.15));
    color: var(--primary-light);
    border-color: rgba(99, 102, 241, 0.3);
}

/* Prediction Confidence Progress Bar */
.confidence-progress {
    margin: 1rem 0;
}

.confidence-label {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.5rem;
    font-weight: 600;
    font-size: 0.875rem;
}

.confidence-bar {
    height: 12px;
    background: linear-gradient(90deg, #e5e7eb 0%, #f3f4f6 100%);
    border-radius: 100px;
    overflow: hidden;
    position: relative;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.06);
}

.confidence-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--success-color), var(--primary-color));
    border-radius: 100px;
    transition: width 1s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.confidence-fill::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    animation: confidenceShine 2s ease-in-out infinite;
}

@keyframes confidenceShine {
    0% { left: -100%; }
    100% { left: 100%; }
}

/* Enhanced Loading Spinners */
.modern-spinner {
    width: 50px;
    height: 50px;
    border: 4px solid rgba(99, 102, 241, 0.1);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: modernSpin 1s cubic-bezier(0.68, -0.55, 0.265, 1.55) infinite;
    position: relative;
}

.modern-spinner::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    background: var(--primary-color);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    animation: pulse 1.5s ease-in-out infinite;
}

@keyframes modernSpin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Enhanced Skeleton Loaders */
.skeleton {
    background: linear-gradient(90deg, 
        rgba(156, 163, 175, 0.1) 25%, 
        rgba(156, 163, 175, 0.3) 50%, 
        rgba(156, 163, 175, 0.1) 75%
    );
    background-size: 200% 100%;
    animation: modernSkeletonLoading 1.5s ease-in-out infinite;
    border-radius: 8px;
    border: 1px solid rgba(156, 163, 175, 0.1);
}

@keyframes modernSkeletonLoading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* Hover Lift Effect */
.hover-lift {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.hover-lift:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.15);
}

/* Chart Container Enhancements */
.chart-container {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.95) 0%, rgba(255, 255, 255, 0.8) 100%);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 20px;
    padding: 2rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1), 0 1px 8px rgba(0, 0, 0, 0.06);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(20px);
}

.chart-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    opacity: 0;
    transition: opacity 0.3s ease;
}

.chart-container:hover {
    transform: translateY(-6px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15), 0 8px 16px rgba(0, 0, 0, 0.1);
}

.chart-container:hover::before {
    opacity: 1;
}

/* Notification Badge Animation */
.notification-badge {
    position: absolute;
    top: -4px;
    right: -4px;
    background: linear-gradient(135deg, #ef4444, #dc2626);
    color: white;
    border-radius: 50%;
    width: 18px;
    height: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.7rem;
    font-weight: bold;
    animation: badgePulse 2s ease-in-out infinite;
    border: 2px solid white;
}

@keyframes badgePulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

/* Ripple Effect */
.ripple {
    position: relative;
    overflow: hidden;
}

.ripple::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    transform: translate(-50%, -50%);
    transition: width 0.6s ease, height 0.6s ease;
}

.ripple:active::before {
    width: 300px;
    height: 300px;
}

/* Dark Mode Enhancements */
[data-theme="dark"] .stat-card {
    background: linear-gradient(135deg, rgba(31, 41, 55, 0.95) 0%, rgba(31, 41, 55, 0.8) 100%);
    border-color: rgba(75, 85, 99, 0.3);
    color: var(--gray-100);
}

[data-theme="dark"] .card {
    background: linear-gradient(135deg, rgba(31, 41, 55, 0.95) 0%, rgba(31, 41, 55, 0.8) 100%);
    border-color: rgba(75, 85, 99, 0.3);
    color: var(--gray-100);
}

[data-theme="dark"] .quick-action-btn {
    background: linear-gradient(135deg, rgba(31, 41, 55, 0.9) 0%, rgba(31, 41, 55, 0.7) 100%);
    border-color: rgba(99, 102, 241, 0.3);
    color: var(--gray-300);
}

[data-theme="dark"] .chart-container {
    background: linear-gradient(135deg, rgba(31, 41, 55, 0.95) 0%, rgba(31, 41, 55, 0.8) 100%);
    border-color: rgba(75, 85, 99, 0.3);
}

/* Quick Actions Grid */
.quick-actions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

/* Activity Feed Styles */
.activity-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1rem;
    border-radius: 12px;
    margin-bottom: 0.75rem;
    background: rgba(255, 255, 255, 0.5);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: all 0.3s ease;
    animation: slideInUp 0.5s ease-out forwards;
    opacity: 0;
    transform: translateY(20px);
}

@keyframes slideInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.activity-item:hover {
    background: rgba(255, 255, 255, 0.8);
    transform: translateX(4px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.activity-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(99, 102, 241, 0.1);
    flex-shrink: 0;
    font-size: 1rem;
}

.activity-content {
    flex: 1;
    min-width: 0;
}

.activity-title {
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
    color: var(--gray-800);
}

.activity-description {
    font-size: 0.8rem;
    color: var(--gray-600);
    margin-bottom: 0.25rem;
    line-height: 1.4;
}

/* Enhanced Chart Tooltip */
.enhanced-chart-tooltip {
    font-family: 'Inter', sans-serif;
}

.enhanced-chart-tooltip .tooltip-header {
    font-weight: 600;
    margin-bottom: 4px;
    color: var(--primary-color);
}

.enhanced-chart-tooltip .tooltip-value {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.enhanced-chart-tooltip .tooltip-trend {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 0.75rem;
}

.enhanced-chart-tooltip .tooltip-trend.positive {
    color: var(--success-color);
}

.enhanced-chart-tooltip .tooltip-trend.negative {
    color: var(--danger-color);
}

/* Loading Progress Animation */
@keyframes progressPulse {
    0%, 100% { opacity: 0.8; }
    50% { opacity: 1; }
}

.confidence-fill {
    animation: progressPulse 2s ease-in-out infinite;
}

/* Enhanced Button Interactions */
.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

.btn:active {
    transform: translateY(0) scale(0.98);
    transition: all 0.1s ease;
}

/* Dark Mode Activity Feed */
[data-theme="dark"] .activity-item {
    background: rgba(31, 41, 55, 0.5);
    border-color: rgba(75, 85, 99, 0.3);
}

[data-theme="dark"] .activity-item:hover {
    background: rgba(31, 41, 55, 0.8);
}

[data-theme="dark"] .activity-title {
    color: var(--gray-200);
}

[data-theme="dark"] .activity-description {
    color: var(--gray-400);
}

[data-theme="dark"] .activity-icon {
    background: rgba(99, 102, 241, 0.2);
    color: var(--primary-light);
}

/* Responsive Grid Adjustments */
@media (max-width: 768px) {
    .quick-actions-grid {
        grid-template-columns: 1fr;
    }
    
    .stat-card {
        margin-bottom: 1rem;
    }
    
    .activity-item {
        padding: 0.75rem;
    }
}

/* Smooth Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.05);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: rgba(99, 102, 241, 0.3);
    border-radius: 4px;
    transition: background 0.3s ease;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(99, 102, 241, 0.5);
}

/* Dark Mode Scrollbar */
[data-theme="dark"] ::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.05);
}

[data-theme="dark"] ::-webkit-scrollbar-thumb {
    background: rgba(99, 102, 241, 0.4);
}

[data-theme="dark"] ::-webkit-scrollbar-thumb:hover {
    background: rgba(99, 102, 241, 0.6);
}

/* Dark Mode Theme Variables */
[data-theme="dark"] {
    /* Required tokens */
    --primary: #6366f1;
    --secondary: #8b5cf6;
    --background: #0f172a;
    --surface: #111827;
    --text-primary: #f9fafb;
    --text-secondary: #e5e7eb;
    --border-color: #374151;
    --hover-color: rgba(99, 102, 241, 0.18);

    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary-color: #8b5cf6;
    --accent-color: #ec4899;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --info-color: #3b82f6;
    --dark-color: #f9fafb;
    --light-color: #1f2937;
    --gray-50: #111827;
    --gray-100: #1f2937;
    --gray-200: #374151;
    --gray-300: #4b5563;
    --gray-400: #6b7280;
    --gray-500: #9ca3af;
    --gray-600: #d1d5db;
    --gray-700: #e5e7eb;
    --gray-800: #f3f4f6;
    --gray-900: #f9fafb;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -2px rgba(0, 0, 0, 0.3);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 10px 10px -5px rgba(0, 0, 0, 0.4);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.6);
    --border-radius: 12px;
    --border-radius-lg: 16px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Enhanced Chart Container Styles */
.chart-container {
    position: relative;
    width: 100%;
    height: 400px;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    border-radius: var(--border-radius-lg);
    padding: 20px;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    overflow: hidden;
}

.chart-container:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

/* ========== BREADCRUMB NAVIGATION ========== */

.breadcrumb-container {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--border-radius);
    padding: 1rem 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.breadcrumb-container:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.breadcrumb {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin: 0;
    padding: 0;
    list-style: none;
    font-size: 0.875rem;
}

.breadcrumb-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--gray-600);
    font-weight: 500;
}

.breadcrumb-item a {
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
}

.breadcrumb-item a:hover {
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary-dark);
}

.breadcrumb-item.active {
    color: var(--gray-500);
    font-weight: 600;
}

.breadcrumb-separator {
    color: var(--gray-400);
    font-size: 0.75rem;
    margin: 0 0.25rem;
}

.breadcrumb-icon {
    font-size: 0.875rem;
    margin-right: 0.25rem;
}

/* Dark mode breadcrumb */
[data-theme="dark"] .breadcrumb-container {
    background: rgba(31, 41, 55, 0.95);
    border-color: rgba(75, 85, 99, 0.3);
}

[data-theme="dark"] .breadcrumb-item a {
    color: var(--primary-light);
}

[data-theme="dark"] .breadcrumb-item a:hover {
    background: rgba(99, 102, 241, 0.2);
}

[data-theme="dark"] .breadcrumb-item.active {
    color: var(--gray-400);
}

/* ========== PAGINATION ========== */

.pagination-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
    gap: 1rem;
    flex-wrap: wrap;
}

.pagination-info {
    color: var(--gray-600);
    font-size: 0.875rem;
    font-weight: 500;
}

.pagination {
    display: flex;
    gap: 0.5rem;
    align-items: center;
    margin: 0;
    padding: 0;
    list-style: none;
}

.pagination .page-item {
    display: flex;
    align-items: center;
}

.pagination .page-link {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 2.5rem;
    height: 2.5rem;
    padding: 0.5rem 0.75rem;
    background: rgba(255, 255, 255, 0.9);
    border: 1px solid var(--gray-300);
    border-radius: 8px;
    color: var(--gray-700);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.875rem;
    transition: var(--transition);
    cursor: pointer;
    backdrop-filter: blur(10px);
}

.pagination .page-link:hover {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.pagination .page-item.active .page-link {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-color: var(--primary-color);
    color: white;
    transform: scale(1.05);
    box-shadow: var(--shadow-md);
}

.pagination .page-item.disabled .page-link {
    background: var(--gray-100);
    border-color: var(--gray-200);
    color: var(--gray-400);
    cursor: not-allowed;
    opacity: 0.6;
}

.pagination .page-item.disabled .page-link:hover {
    transform: none;
    box-shadow: none;
}

.pagination-ellipsis {
    padding: 0 0.5rem;
    color: var(--gray-500);
    font-weight: 500;
}

.pagination-size-selector {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
}

.pagination-size-selector select {
    padding: 0.25rem 0.5rem;
    border: 1px solid var(--gray-300);
    border-radius: 6px;
    background: white;
    color: var(--gray-700);
    font-size: 0.875rem;
    transition: var(--transition);
}

.pagination-size-selector select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.2);
}

/* Dark mode pagination */
[data-theme="dark"] .pagination .page-link {
    background: rgba(31, 41, 55, 0.9);
    border-color: var(--gray-300);
    color: var(--gray-300);
}

[data-theme="dark"] .pagination .page-link:hover {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

[data-theme="dark"] .pagination .page-item.active .page-link {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-color: var(--primary-color);
}

[data-theme="dark"] .pagination .page-item.disabled .page-link {
    background: var(--gray-100);
    border-color: var(--gray-200);
    color: var(--gray-500);
}

[data-theme="dark"] .pagination-size-selector select {
    background: var(--gray-100);
    border-color: var(--gray-300);
    color: var(--gray-300);
}

/* ========== ENHANCED SKELETON LOADERS ========== */

.skeleton-container {
    background: rgba(255, 255, 255, 0.9);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    backdrop-filter: blur(10px);
}

.skeleton {
    background: linear-gradient(90deg, 
        rgba(156, 163, 175, 0.2) 25%, 
        rgba(156, 163, 175, 0.3) 50%, 
        rgba(156, 163, 175, 0.2) 75%
    );
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s ease-in-out infinite;
    border-radius: 6px;
}

/* Dark mode skeleton */
[data-theme="dark"] .skeleton {
    background: linear-gradient(90deg, 
        rgba(75, 85, 99, 0.3) 25%, 
        rgba(75, 85, 99, 0.5) 50%, 
        rgba(75, 85, 99, 0.3) 75%
    );
    background-size: 200% 100%;
}

/* Skeleton components */
.skeleton-header {
    height: 2rem;
    margin-bottom: 1rem;
    width: 60%;
}

.skeleton-title {
    height: 1.5rem;
    margin-bottom: 0.75rem;
    width: 80%;
}

.skeleton-text {
    height: 1rem;
    margin-bottom: 0.5rem;
    width: 100%;
}

.skeleton-text.small {
    height: 0.75rem;
    width: 90%;
}

.skeleton-text.large {
    height: 1.25rem;
    width: 85%;
}

.skeleton-avatar {
    width: 3rem;
    height: 3rem;
    border-radius: 50%;
    margin-bottom: 0.75rem;
}

.skeleton-button {
    height: 2.5rem;
    width: 6rem;
    border-radius: 6px;
    margin-right: 0.5rem;
}

.skeleton-card {
    height: 8rem;
    margin-bottom: 1rem;
    border-radius: var(--border-radius);
}

.skeleton-stat {
    height: 3rem;
    margin-bottom: 1rem;
    border-radius: var(--border-radius);
}

.skeleton-table-row {
    display: flex;
    gap: 1rem;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--gray-100);
}

.skeleton-table-cell {
    height: 1rem;
    border-radius: 4px;
    flex: 1;
}

.skeleton-table-cell.short {
    flex: 0.5;
}

.skeleton-table-cell.medium {
    flex: 0.75;
}

/* Skeleton for charts */
.skeleton-chart {
    height: 400px;
    border-radius: var(--border-radius);
    margin-bottom: 1rem;
    position: relative;
    overflow: hidden;
}

.skeleton-chart::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, 
        transparent, 
        rgba(255, 255, 255, 0.2), 
        transparent
    );
    animation: skeleton-shine 2s ease-in-out infinite;
}

/* Skeleton for activity feed */
.skeleton-activity {
    display: flex;
    gap: 1rem;
    padding: 1rem 0;
    border-bottom: 1px solid var(--gray-100);
}

.skeleton-activity-icon {
    width: 2.25rem;
    height: 2.25rem;
    border-radius: 50%;
    flex-shrink: 0;
}

.skeleton-activity-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

/* ========== ENHANCED LOADING STATES ========== */

.loading-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 3rem 2rem;
    text-align: center;
    min-height: 200px;
}

.loading-state .loading-icon {
    width: 3rem;
    height: 3rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
    animation: spin 1s linear infinite;
}

.loading-state .loading-text {
    color: var(--gray-600);
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.loading-state .loading-subtext {
    color: var(--gray-500);
    font-size: 0.875rem;
    opacity: 0.8;
}

/* Loading overlay for specific components */
.component-loading-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(5px);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--border-radius);
    z-index: 100;
    transition: opacity 0.3s ease;
}

.component-loading-overlay.dark {
    background: rgba(31, 41, 55, 0.95);
}

.component-loading-overlay .loading-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.component-loading-overlay .spinner {
    width: 2rem;
    height: 2rem;
    border: 3px solid var(--gray-200);
    border-top: 3px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

/* Progress loading states */
.progress-loading-state {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    padding: 2rem;
}

.progress-loading-state .progress-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.875rem;
    color: var(--gray-600);
}

.progress-loading-state .progress-bar-container {
    width: 100%;
    height: 8px;
    background: var(--gray-200);
    border-radius: 4px;
    overflow: hidden;
}

.progress-loading-state .progress-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--primary-light));
    background-size: 200% 100%;
    animation: progress-loading 2s ease-in-out infinite;
    border-radius: 4px;
    transition: width 0.3s ease;
}

/* Staggered loading animation */
.staggered-load > * {
    opacity: 0;
    animation: staggeredFadeIn 0.5s ease-out forwards;
}

.staggered-load > *:nth-child(1) { animation-delay: 0.1s; }
.staggered-load > *:nth-child(2) { animation-delay: 0.2s; }
.staggered-load > *:nth-child(3) { animation-delay: 0.3s; }
.staggered-load > *:nth-child(4) { animation-delay: 0.4s; }
.staggered-load > *:nth-child(5) { animation-delay: 0.5s; }
.staggered-load > *:nth-child(6) { animation-delay: 0.6s; }
.staggered-load > *:nth-child(7) { animation-delay: 0.7s; }
.staggered-load > *:nth-child(8) { animation-delay: 0.8s; }

@keyframes staggeredFadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Skeleton shine effect */
@keyframes skeleton-shine {
    0% { left: -100%; }
    100% { left: 100%; }
}

/* ========== NOTIFICATION TOASTS ========== */

.toast-notification {
    position: fixed;
    top: 20px;
    right: 20px;
    min-width: 300px;
    max-width: 400px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    z-index: 9999;
    transform: translateX(100%);
    transition: transform 0.3s ease, opacity 0.3s ease;
    opacity: 0;
}

.toast-notification.show {
    transform: translateX(0);
    opacity: 1;
}

.toast-content {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 1rem;
}

.toast-icon {
    flex-shrink: 0;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    font-size: 12px;
}

.toast-notification.success .toast-icon {
    background: var(--success-color);
    color: white;
}

.toast-notification.error .toast-icon {
    background: var(--danger-color);
    color: white;
}

.toast-notification.warning .toast-icon {
    background: var(--warning-color);
    color: white;
}

.toast-notification.info .toast-icon {
    background: var(--info-color);
    color: white;
}

.toast-message {
    flex: 1;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--gray-700);
    line-height: 1.4;
}

.toast-close {
    flex-shrink: 0;
    background: none;
    border: none;
    color: var(--gray-500);
    cursor: pointer;
    padding: 4px;
    border-radius: 4px;
    transition: var(--transition);
    font-size: 12px;
}

.toast-close:hover {
    background: rgba(0, 0, 0, 0.1);
    color: var(--gray-700);
}

/* Dark mode toasts */
[data-theme="dark"] .toast-notification {
    background: rgba(31, 41, 55, 0.95);
    border-color: rgba(75, 85, 99, 0.3);
}

[data-theme="dark"] .toast-message {
    color: var(--gray-300);
}

[data-theme="dark"] .toast-close {
    color: var(--gray-400);
}

[data-theme="dark"] .toast-close:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--gray-200);
}

/* ========== LOADING SPINNERS ========== */

/* Main loading spinner */
.loading-spinner {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    color: var(--primary-color);
}

.loading-spinner .spinner-border {
    width: 3rem;
    height: 3rem;
    animation: spinner-border 0.75s linear infinite;
}

/* Pulse loading spinner */
.loading-pulse {
    display: inline-block;
    width: 2rem;
    height: 2rem;
    background-color: var(--primary-color);
    border-radius: 50%;
    animation: pulse 1.5s ease-in-out infinite;
}

/* Dots loading spinner */
.loading-dots {
    display: inline-flex;
    gap: 0.25rem;
}

.loading-dots span {
    width: 0.5rem;
    height: 0.5rem;
    background-color: var(--primary-color);
    border-radius: 50%;
    animation: dot-pulse 1.4s ease-in-out infinite both;
}

.loading-dots span:nth-child(1) { animation-delay: -0.32s; }
.loading-dots span:nth-child(2) { animation-delay: -0.16s; }
.loading-dots span:nth-child(3) { animation-delay: 0; }

/* Skeleton loading */
.skeleton {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s ease-in-out infinite;
    border-radius: 4px;
}

.skeleton-text {
    height: 1rem;
    margin-bottom: 0.5rem;
}

.skeleton-text.large {
    height: 1.5rem;
}

.skeleton-text.small {
    height: 0.75rem;
}

/* Progress bar loading */
.progress-loading {
    width: 100%;
    height: 4px;
    background-color: #e0e0e0;
    border-radius: 2px;
    overflow: hidden;
}

.progress-loading .progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--primary-light));
    background-size: 200% 100%;
    animation: progress-loading 2s ease-in-out infinite;
}

/* ========== ERROR MESSAGES ========== */

/* Error container */
.error-container {
    background: linear-gradient(135deg, #fef2f2 0%, #fee2e2 100%);
    border: 1px solid #fecaca;
    border-radius: var(--border-radius);
    padding: 1rem;
    margin: 1rem 0;
    color: #dc2626;
    box-shadow: var(--shadow-sm);
}

.error-container .error-icon {
    color: #ef4444;
    margin-right: 0.5rem;
}

.error-container .error-title {
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.error-container .error-message {
    font-size: 0.875rem;
    opacity: 0.9;
}

/* Warning container */
.warning-container {
    background: linear-gradient(135deg, #fffbeb 0%, #fef3c7 100%);
    border: 1px solid #fed7aa;
    border-radius: var(--border-radius);
    padding: 1rem;
    margin: 1rem 0;
    color: #d97706;
    box-shadow: var(--shadow-sm);
}

.warning-container .warning-icon {
    color: #f59e0b;
    margin-right: 0.5rem;
}

/* Success container */
.success-container {
    background: linear-gradient(135deg, #f0fdf4 0%, #dcfce7 100%);
    border: 1px solid #bbf7d0;
    border-radius: var(--border-radius);
    padding: 1rem;
    margin: 1rem 0;
    color: #16a34a;
    box-shadow: var(--shadow-sm);
}

.success-container .success-icon {
    color: #10b981;
    margin-right: 0.5rem;
}

/* Info container */
.info-container {
    background: linear-gradient(135deg, #eff6ff 0%, #dbeafe 100%);
    border: 1px solid #bfdbfe;
    border-radius: var(--border-radius);
    padding: 1rem;
    margin: 1rem 0;
    color: #2563eb;
    box-shadow: var(--shadow-sm);
}

.info-container .info-icon {
    color: #3b82f6;
    margin-right: 0.5rem;
}

/* ========== ANIMATIONS ========== */

@keyframes spinner-border {
    to { transform: rotate(360deg); }
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

@keyframes dot-pulse {
    0%, 80%, 100% {
        transform: scale(0.8);
        opacity: 0.5;
    }
    40% {
        transform: scale(1);
        opacity: 1;
    }
}

@keyframes skeleton-loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

@keyframes progress-loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    10%, 30%, 50%, 70%, 90% { transform: translateX(-2px); }
    20%, 40%, 60%, 80% { transform: translateX(2px); }
}

@keyframes fade-in {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes slide-in {
    from { opacity: 0; transform: translateX(-20px); }
    to { opacity: 1; transform: translateX(0); }
}

/* ========== UTILITY CLASSES ========== */

.fade-in {
    animation: fade-in 0.3s ease-out;
}

.slide-in {
    animation: slide-in 0.3s ease-out;
}

.shake {
    animation: shake 0.5s ease-in-out;
}

.loading-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    border-radius: var(--border-radius);
}

.loading-overlay.dark {
    background: rgba(0, 0, 0, 0.7);
}

/* Dark mode adjustments */
[data-theme="dark"] .error-container {
    background: linear-gradient(135deg, #450a0a 0%, #7f1d1d 100%);
    border-color: #991b1b;
    color: #fca5a5;
}

[data-theme="dark"] .warning-container {
    background: linear-gradient(135deg, #451a03 0%, #78350f 100%);
    border-color: #92400e;
    color: #fcd34d;
}

[data-theme="dark"] .success-container {
    background: linear-gradient(135deg, #052e16 0%, #14532d 100%);
    border-color: #166534;
    color: #86efac;
}

[data-theme="dark"] .info-container {
    background: linear-gradient(135deg, #1e3a8a 0%, #1e40af 100%);
    border-color: #1d4ed8;
    color: #93c5fd;
}

[data-theme="dark"] .loading-overlay {
    background: rgba(0, 0, 0, 0.8);
}

[data-theme="dark"] .skeleton {
    background: linear-gradient(90deg, #374151 25%, #4b5563 50%, #374151 75%);
    background-size: 200% 100%;
}

.chart-container canvas {
    width: 100% !important;
    height: 100% !important;
    border-radius: 8px;
}

/* Dark mode chart containers */
[data-theme="dark"] .chart-container {
    background: linear-gradient(135deg, #1f2937 0%, #374151 100%);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.6), 0 2px 4px -1px rgba(0, 0, 0, 0.4);
}

[data-theme="dark"] .chart-container:hover {
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.7), 0 4px 6px -2px rgba(0, 0, 0, 0.5);
}

/* Responsive chart containers */
@media (max-width: 768px) {
    .chart-container {
        height: 300px;
        padding: 15px;
    }
}

@media (max-width: 480px) {
    .chart-container {
        height: 250px;
        padding: 10px;
    }
}

/* Chart loading animation */
.chart-loading {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    color: var(--gray-500);
}

.chart-loading .spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--gray-200);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Chart tooltip enhancements */
.chart-tooltip {
    background: rgba(0, 0, 0, 0.9) !important;
    border: 1px solid rgba(255, 255, 255, 0.1) !important;
    border-radius: 8px !important;
    padding: 12px !important;
    font-family: 'Inter', sans-serif !important;
    font-size: 12px !important;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3) !important;
    backdrop-filter: blur(10px) !important;
}

/* Chart legend enhancements */
.chart-legend {
    font-family: 'Inter', sans-serif !important;
    font-size: 12px !important;
    font-weight: 500 !important;
    padding: 10px !important;
    background: rgba(255, 255, 255, 0.9) !important;
    border-radius: 6px !important;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1) !important;
}

[data-theme="dark"] .chart-legend {
    background: rgba(31, 41, 55, 0.9) !important;
    color: #f9fafb !important;
}

/* Theme Toggle Button */
.theme-toggle {
    background: var(--gray-100);
    border: 2px solid var(--gray-300);
    border-radius: 50px;
    padding: 8px 16px;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    font-weight: 500;
    color: var(--gray-700);
    position: relative;
    overflow: hidden;
}

.theme-toggle:hover {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.theme-toggle .icon {
    font-size: 16px;
    transition: var(--transition);
}

.theme-toggle:hover .icon {
    transform: rotate(180deg);
}

/* Dark Mode Specific Styles */
[data-theme="dark"] .dashboard-body {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    color: var(--gray-800);
}

[data-theme="dark"] .sidebar {
    background: rgba(31, 41, 55, 0.95);
    border-right: 1px solid rgba(75, 85, 99, 0.3);
}

[data-theme="dark"] .sidebar-header {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
}

[data-theme="dark"] .nav-link {
    color: var(--gray-400);
}

[data-theme="dark"] .nav-link:hover,
[data-theme="dark"] .nav-link.active {
    background: linear-gradient(135deg, var(--primary-light), var(--primary-color));
    color: white;
}

[data-theme="dark"] .main-content {
    background: var(--gray-50);
}

[data-theme="dark"] .top-nav {
    background: rgba(31, 41, 55, 0.95);
    border-bottom: 1px solid rgba(75, 85, 99, 0.3);
}

[data-theme="dark"] .top-bar {
    background: rgba(31, 41, 55, 0.95);
    border-bottom: 1px solid var(--gray-200);
}

[data-theme="dark"] .card {
    background: rgba(31, 41, 55, 0.95);
    border: 1px solid rgba(75, 85, 99, 0.3);
}

[data-theme="dark"] .card-header {
    background: linear-gradient(135deg, rgba(31, 41, 55, 0.9), rgba(31, 41, 55, 0.7));
    border-bottom: 1px solid var(--gray-200);
    color: var(--gray-800);
}

[data-theme="dark"] .form-control {
    background: rgba(31, 41, 55, 0.9);
    border-color: var(--gray-300);
    color: var(--gray-800);
}

[data-theme="dark"] .form-control:focus {
    background: rgba(31, 41, 55, 1);
    border-color: var(--primary-color);
}

[data-theme="dark"] .chat-messages {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
}

[data-theme="dark"] .message.bot .chat-bubble {
    background: var(--gray-100);
    color: var(--gray-800);
}

[data-theme="dark"] .chat-input-area {
    background: var(--gray-100);
    border-top: 1px solid var(--gray-300);
}

[data-theme="dark"] .chat-input {
    background: var(--gray-50);
    border-color: var(--gray-300);
    color: var(--gray-800);
}

[data-theme="dark"] .chart-tooltip {
    background: rgba(31, 41, 55, 0.9) !important;
}

[data-theme="dark"] .chart-legend {
    background: rgba(31, 41, 55, 0.95) !important;
    border: 1px solid var(--gray-300) !important;
}

[data-theme="dark"] .model-toggle-controls {
    background: linear-gradient(135deg, var(--gray-50) 0%, var(--gray-100) 100%);
    border: 1px solid var(--gray-300);
}

[data-theme="dark"] .chart-zoom-btn {
    background: rgba(31, 41, 55, 0.9);
    border: 1px solid var(--gray-300);
    color: var(--gray-600);
}

[data-theme="dark"] .chart-zoom-btn:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

[data-theme="dark"] .stat-card {
    background: rgba(31, 41, 55, 0.95);
    border: 1px solid rgba(75, 85, 99, 0.3);
}

[data-theme="dark"] .loading-spinner {
    background: rgba(31, 41, 55, 0.9);
}

[data-theme="dark"] .loading-overlay {
    background: rgba(31, 41, 55, 0.9);
}

[data-theme="dark"] .quick-action-btn {
    background: var(--gray-100);
    border: 2px solid var(--gray-300);
    color: var(--gray-600);
}

[data-theme="dark"] .quick-action-btn:hover {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

/* Smooth theme transition */
* {
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease !important;
}

/* Enhanced Chart Styles */
.chart-container {
    position: relative;
    height: 400px;
    margin: 1rem 0;
}

.chart-container canvas {
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.chart-container canvas:hover {
    box-shadow: var(--shadow-md);
}

/* Model Toggle Controls */
.model-toggle-controls {
    background: linear-gradient(135deg, var(--gray-50) 0%, var(--gray-100) 100%);
    border-radius: var(--border-radius);
    padding: 1rem;
    margin-top: 1rem;
    border: 1px solid var(--gray-200);
    box-shadow: var(--shadow-sm);
}

.model-toggle-controls h6 {
    color: var(--gray-800);
    font-weight: 600;
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.model-toggle-btn {
    font-weight: 500;
    border-radius: 8px;
    transition: var(--transition);
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.025em;
    position: relative;
    overflow: hidden;
}

.model-toggle-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.model-toggle-btn:hover::before {
    left: 100%;
}

.model-toggle-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.model-toggle-btn.active {
    transform: scale(1.05);
    box-shadow: var(--shadow-lg);
}

/* Enhanced Chart Interactivity */
.canvas-focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
    border-radius: var(--border-radius);
}

/* Chart Loading Animation */
.chart-loading {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--border-radius);
    z-index: 10;
}

.chart-loading .spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--gray-200);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Chart Tooltip Enhancements */
.chart-tooltip {
    background: rgba(0, 0, 0, 0.9) !important;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1) !important;
    box-shadow: var(--shadow-xl) !important;
}

/* Chart Legend Enhancements */
.chart-legend {
    background: rgba(255, 255, 255, 0.95) !important;
    backdrop-filter: blur(10px);
    border: 1px solid var(--gray-200) !important;
    border-radius: var(--border-radius) !important;
    padding: 0.75rem !important;
    box-shadow: var(--shadow-md) !important;
}

/* Responsive Chart Container */
@media (max-width: 768px) {
    .chart-container {
        height: 300px;
    }
    
    .model-toggle-controls {
        padding: 0.75rem;
    }
    
    .model-toggle-btn {
        font-size: 0.7rem;
        padding: 0.375rem 0.75rem;
    }
}

/* Chart Animation Classes */
.chart-animate-in {
    animation: chartFadeIn 1s ease-out;
}

@keyframes chartFadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Chart Export Button */
.chart-export-btn {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 8px;
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    z-index: 5;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.chart-export-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Chart Zoom Controls */
.chart-zoom-controls {
    position: absolute;
    bottom: 1rem;
    right: 1rem;
    display: flex;
    gap: 0.5rem;
    z-index: 5;
}

.chart-zoom-btn {
    background: rgba(255, 255, 255, 0.9);
    border: 1px solid var(--gray-300);
    border-radius: 6px;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.875rem;
}

.chart-zoom-btn:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* Enhanced Sidebar Styles */
.sidebar-user-info {
    padding: 20px 24px;
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    align-items: center;
    gap: 12px;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.05), rgba(139, 92, 246, 0.05));
}

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 18px;
    flex-shrink: 0;
}

.user-details {
    flex: 1;
    min-width: 0;
}

.user-name {
    font-weight: 600;
    color: var(--gray-800);
    font-size: 0.875rem;
    margin-bottom: 2px;
}

.user-role {
    font-size: 0.75rem;
    color: var(--gray-500);
    font-weight: 500;
}

.nav-badge {
    margin-left: auto;
}

.nav-badge .badge {
    font-size: 0.625rem;
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

.sidebar-footer {
    margin-top: auto;
    padding: 20px 24px;
    border-top: 1px solid var(--gray-200);
    background: rgba(249, 250, 251, 0.5);
}

.footer-section {
    margin-bottom: 16px;
}

.footer-section:last-child {
    margin-bottom: 0;
}

.footer-section h6 {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--gray-400);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 8px;
}

.status-indicators {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.status-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.75rem;
    color: var(--gray-600);
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    flex-shrink: 0;
}

.status-dot.online {
    background: var(--success-color);
    box-shadow: 0 0 0 2px rgba(16, 185, 129, 0.2);
    animation: pulse 2s infinite;
}

.status-dot.offline {
    background: var(--danger-color);
}

.status-dot.warning {
    background: var(--warning-color);
}

/* Enhanced Navigation Styles */
.nav-link {
    display: flex;
    align-items: center;
    padding: 14px 20px;
    color: var(--gray-600);
    text-decoration: none;
    transition: var(--transition);
    border-radius: var(--border-radius);
    font-weight: 500;
    position: relative;
    overflow: hidden;
    gap: 12px;
}

.nav-link i {
    width: 20px;
    text-align: center;
    font-size: 1.1rem;
    flex-shrink: 0;
}

.nav-link span {
    flex: 1;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.nav-link::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 0;
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    transition: var(--transition);
    opacity: 0.1;
}

.nav-link:hover::before,
.nav-link.active::before {
    width: 100%;
}

.nav-link:hover,
.nav-link.active {
    background: linear-gradient(135deg, var(--primary-light), var(--primary-color));
    color: white;
    transform: translateX(4px);
    box-shadow: var(--shadow-md);
}

.nav-link:hover .nav-item-indicator,
.nav-link.active .nav-item-indicator {
    height: 70%;
}

/* Hover Effects */
.hover-lift {
    transition: var(--transition);
}

.hover-lift:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

/* Quick Actions Grid */
.quick-actions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
}

.quick-action-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 24px 16px;
    background: var(--gray-50);
    border: 2px solid var(--gray-200);
    border-radius: var(--border-radius);
    color: var(--gray-700);
    font-weight: 500;
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
    gap: 12px;
    min-height: 120px;
}

.quick-action-btn:hover {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-color: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.quick-action-btn i {
    font-size: 2rem;
    opacity: 0.8;
    transition: var(--transition);
}

.quick-action-btn:hover i {
    opacity: 1;
    transform: scale(1.1);
}

.quick-action-btn span {
    font-size: 0.875rem;
    text-align: center;
    line-height: 1.2;
}

/* Activity Feed */
.activity-feed {
    max-height: 400px;
    overflow-y: auto;
}

.activity-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 12px 0;
    border-bottom: 1px solid var(--gray-100);
    transition: var(--transition);
}

.activity-item:last-child {
    border-bottom: none;
}

.activity-item:hover {
    background: var(--gray-50);
    border-radius: 8px;
    padding: 12px;
    margin: 0 -12px;
}

.activity-icon {
    flex-shrink: 0;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gray-100);
    border-radius: 50%;
    font-size: 0.875rem;
}

.activity-content {
    flex: 1;
    min-width: 0;
}

.activity-content p {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--gray-800);
    margin: 0;
    line-height: 1.4;
}

.activity-content small {
    font-size: 0.75rem;
    color: var(--gray-500);
    margin-top: 2px;
}

/* Status List */
.status-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.status-list .status-item {
    margin-bottom: 0;
}

/* Upload Zone */
.upload-zone {
    border: 2px dashed var(--gray-300);
    border-radius: var(--border-radius);
    padding: 40px 20px;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    background: var(--gray-50);
}

.upload-zone:hover,
.upload-zone.dragover {
    border-color: var(--primary-color);
    background: rgba(99, 102, 241, 0.05);
}

.upload-zone input[type="file"] {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
}

.upload-content i {
    color: var(--primary-color);
    margin-bottom: 16px;
}

/* Chat Container */
.chat-container {
    height: 600px;
    display: flex;
    flex-direction: column;
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
}

.chat-input-area {
    padding: 20px;
    border-top: 1px solid var(--gray-200);
    background: white;
}

.chat-input {
    border-radius: 24px;
    padding: 12px 20px;
    border: 1px solid var(--gray-300);
}

/* Model Selection */
.model-selection {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.model-selection .form-check {
    margin-bottom: 0;
}

/* Responsive Enhancements */
@media (max-width: 1200px) {
    .nav-center {
        max-width: 300px;
    }
    
    .search-bar {
        max-width: 300px;
    }
}

@media (max-width: 992px) {
    .nav-center {
        display: none;
    }
    
    .nav-left {
        max-width: none;
    }
    
    .nav-right {
        max-width: none;
    }
    
    .brand-tagline {
        display: none;
    }
}

@media (max-width: 768px) {
    .top-nav {
        height: 60px;
        padding: 0 16px;
    }
    
    main {
        margin-top: 60px !important;
    }
    
    .nav-brand {
        gap: 8px;
    }
    
    .brand-logo {
        width: 32px;
        height: 32px;
        font-size: 1rem;
    }
    
    .brand-name {
        font-size: 1.125rem;
    }
    
    .nav-actions {
        gap: 4px;
    }
    
    .nav-action-btn,
    .theme-toggle {
        width: 36px;
        height: 36px;
        font-size: 0.75rem;
    }
    
    .notification-badge {
        width: 16px;
        height: 16px;
        font-size: 0.5625rem;
    }
    
    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s ease;
    }
    
    .sidebar.show {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .content-area {
        padding: 20px;
    }
    
    .quick-actions-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }
    
    .quick-action-btn {
        padding: 16px 12px;
        min-height: 100px;
    }
    
    .quick-action-btn i {
        font-size: 1.5rem;
    }
    
    .quick-action-btn span {
        font-size: 0.75rem;
    }
    
    .chat-container {
        height: 500px;
    }
    
    .stat-card {
        padding: 20px;
    }
    
    .stat-icon {
        width: 48px;
        height: 48px;
        font-size: 1.25rem;
    }
    
    .stat-number {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .top-nav {
        padding: 0 12px;
    }
    
    .content-area {
        padding: 16px;
    }
    
    .quick-actions-grid {
        grid-template-columns: 1fr;
    }
    
    .sidebar-user-info {
        padding: 16px 20px;
    }
    
    .nav-link {
        padding: 12px 16px;
    }
    
    .sidebar-footer {
        padding: 16px 20px;
    }
    
    .stat-card {
        padding: 16px;
        flex-direction: column;
        text-align: center;
        gap: 12px;
    }
    
    .stat-icon {
        width: 56px;
        height: 56px;
        font-size: 1.5rem;
    }
    
    .stat-number {
        font-size: 1.75rem;
    }
    
    .row .col-lg-3 {
        margin-bottom: 1rem;
    }
}

/* Animation Classes */
.fade-in {
    animation: fadeIn 0.5s ease-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Ripple Effect */
.nav-ripple {
    position: absolute;
    top: 50%;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transform: translateY(-50%) scaleX(0);
    transform-origin: left;
    border-radius: inherit;
    pointer-events: none;
}

/* Dark Mode Enhancements */
[data-theme="dark"] .sidebar-user-info {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(139, 92, 246, 0.1));
    border-bottom-color: var(--gray-300);
}

[data-theme="dark"] .user-name {
    color: var(--gray-800);
}

[data-theme="dark"] .user-role {
    color: var(--gray-400);
}

[data-theme="dark"] .sidebar-footer {
    background: rgba(31, 41, 55, 0.5);
    border-top-color: var(--gray-300);
}

[data-theme="dark"] .footer-section h6 {
    color: var(--gray-500);
}

[data-theme="dark"] .status-item {
    color: var(--gray-400);
}

[data-theme="dark"] .upload-zone {
    background: var(--gray-100);
    border-color: var(--gray-300);
}

[data-theme="dark"] .upload-zone:hover,
[data-theme="dark"] .upload-zone.dragover {
    background: rgba(99, 102, 241, 0.1);
    border-color: var(--primary-color);
}

[data-theme="dark"] .chat-messages {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
}

[data-theme="dark"] .chat-input-area {
    background: var(--gray-100);
    border-top-color: var(--gray-300);
}

[data-theme="dark"] .chat-input {
    background: var(--gray-50);
    border-color: var(--gray-300);
    color: var(--gray-800);
}

/* Enhanced Stat Cards */
.stat-card {
    position: relative;
    overflow: hidden;
    transition: var(--transition);
    border-radius: var(--border-radius-lg);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    padding: 24px;
    display: flex;
    align-items: center;
    gap: 16px;
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    opacity: 0;
    transition: var(--transition);
}

.stat-card:hover::before {
    opacity: 1;
}

.stat-icon {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: white;
    flex-shrink: 0;
}

.stat-card-primary .stat-icon {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
}

.stat-card-success .stat-icon {
    background: linear-gradient(135deg, var(--success-color), #059669);
}

.stat-card-warning .stat-icon {
    background: linear-gradient(135deg, var(--warning-color), #d97706);
}

.stat-card-danger .stat-icon {
    background: linear-gradient(135deg, var(--danger-color), #dc2626);
}

.stat-content {
    flex: 1;
    min-width: 0;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    margin: 0;
    line-height: 1;
    transition: var(--transition);
    color: var(--gray-900);
}

.stat-card:hover .stat-number {
    transform: scale(1.05);
}

.stat-label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--gray-600);
    margin: 4px 0;
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

.stat-trend {
    font-size: 0.75rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.25rem;
    margin-top: 0.25rem;
}

.video-info {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.video-title {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--gray-800);
    line-height: 1.2;
    max-width: 150px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.video-views {
    font-size: 0.75rem;
    color: var(--gray-600);
    font-weight: 500;
}

/* Quick Action Buttons */
.quick-action-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 1rem;
    background: var(--gray-50);
    border: 2px solid var(--gray-200);
    border-radius: var(--border-radius);
    color: var(--gray-700);
    font-weight: 500;
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
    width: 100%;
}

.quick-action-btn:hover {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.quick-action-btn i {
    font-size: 1.25rem;
}

/* Alert Container */
#alertContainer {
    position: fixed;
    top: 80px;
    right: 20px;
    z-index: 1050;
    max-width: 400px;
}

.alert {
    border-radius: var(--border-radius);
    border: none;
    box-shadow: var(--shadow-lg);
    margin-bottom: 1rem;
}

/* Responsive Enhancements */
@media (max-width: 768px) {
    .video-title {
        max-width: 120px;
    }
    
    .stat-number {
        font-size: 1.5rem;
    }
    
    .activity-item {
        padding: 0.5rem 0;
    }
    
    .activity-icon {
        width: 32px;
        height: 32px;
        font-size: 0.875rem;
    }
}

/* Modern YouTube Dashboard Styles */
.modern-card {
    border: none;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
}

.modern-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
}

.modern-header {
    background: linear-gradient(135deg, #ff0000 0%, #cc0000 100%);
    color: white;
    border-radius: 16px 16px 0 0;
    border: none;
}

.modern-input {
    border: 2px solid #e0e0e0;
    border-radius: 12px;
    padding: 12px 16px;
    font-size: 16px;
    transition: all 0.3s ease;
    background: rgba(255, 255, 255, 0.9);
}

.modern-input:focus {
    border-color: #ff0000;
    box-shadow: 0 0 0 3px rgba(255, 0, 0, 0.1);
    outline: none;
}

.modern-btn {
    border: none;
    border-radius: 12px;
    padding: 12px 24px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.modern-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.modern-btn:hover::before {
    left: 100%;
}

.modern-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(255, 0, 0, 0.3);
}

/* Video Details Card */
.video-details-card {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.98), rgba(248, 248, 248, 0.95));
    border: 1px solid rgba(255, 0, 0, 0.1);
}

.video-thumbnail-container {
    position: relative;
    overflow: hidden;
    border-radius: 12px;
}

.video-thumbnail {
    width: 100%;
    height: 200px;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.video-thumbnail:hover {
    transform: scale(1.05);
}

.video-duration-badge {
    position: absolute;
    bottom: 8px;
    right: 8px;
    background: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 4px 8px;
    border-radius: 6px;
    font-size: 12px;
    font-weight: 600;
}

.video-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: #1a1a1a;
    line-height: 1.3;
    margin-bottom: 8px;
}

.video-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

.video-description {
    font-size: 0.95rem;
    line-height: 1.6;
    color: #666;
}

.video-actions {
    display: flex;
    gap: 8px;
    flex-shrink: 0;
}

/* Performance Stats */
.performance-stats {
    margin-top: 20px;
}

.stat-card {
    background: white;
    border-radius: 12px;
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 16px;
    border: 1px solid rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    opacity: 0;
    transition: opacity 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.stat-card:hover::before {
    opacity: 1;
}

.stat-icon {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: white;
    flex-shrink: 0;
}

.stat-card-primary .stat-icon {
    background: linear-gradient(135deg, #007bff, #0056b3);
}

.stat-card-success .stat-icon {
    background: linear-gradient(135deg, #28a745, #1e7e34);
}

.stat-card-warning .stat-icon {
    background: linear-gradient(135deg, #ffc107, #e0a800);
}

.stat-card-info .stat-icon {
    background: linear-gradient(135deg, #17a2b8, #138496);
}

.stat-content {
    flex: 1;
    min-width: 0;
}

.stat-number {
    font-size: 1.8rem;
    font-weight: 700;
    color: #1a1a1a;
    line-height: 1;
    margin-bottom: 4px;
}

.stat-label {
    font-size: 0.85rem;
    font-weight: 600;
    color: #666;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Modern Tabs */
.modern-tabs {
    border: none;
    background: rgba(248, 248, 248, 0.8);
    border-radius: 12px 12px 0 0;
    padding: 8px;
    gap: 4px;
}

.modern-tabs .nav-link {
    border: none;
    border-radius: 8px;
    padding: 12px 20px;
    font-weight: 600;
    color: #666;
    transition: all 0.3s ease;
    position: relative;
    background: transparent;
}

.modern-tabs .nav-link:hover {
    background: rgba(255, 0, 0, 0.1);
    color: #ff0000;
}

.modern-tabs .nav-link.active {
    background: linear-gradient(135deg, #ff0000, #cc0000);
    color: white;
    box-shadow: 0 4px 15px rgba(255, 0, 0, 0.3);
}

/* Modern Chart Container */
.modern-chart {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.98), rgba(248, 248, 248, 0.95));
    border: 1px solid rgba(0, 0, 0, 0.05);
    border-radius: 16px;
    padding: 24px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    position: relative;
}

.modern-chart::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #007bff, #28a745, #ffc107, #ff0000);
    border-radius: 16px 16px 0 0;
}

/* Recommendations */
.recommendation-item {
    opacity: 0;
    animation: fadeInUp 0.5s ease forwards;
}

.recommendation-item:nth-child(1) { animation-delay: 0.1s; }
.recommendation-item:nth-child(2) { animation-delay: 0.2s; }
.recommendation-item:nth-child(3) { animation-delay: 0.3s; }
.recommendation-item:nth-child(4) { animation-delay: 0.4s; }
.recommendation-item:nth-child(5) { animation-delay: 0.5s; }

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.recommendation-icon .icon-circle {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
}

/* Chat Container Small */
.chat-container.small {
    height: 400px;
}

.chat-container.small .chat-messages {
    height: 320px;
}

/* Dark Mode Enhancements for Modern UI */
[data-theme="dark"] .modern-card {
    background: rgba(31, 41, 55, 0.95);
    border: 1px solid rgba(75, 85, 99, 0.3);
}

[data-theme="dark"] .modern-header {
    background: linear-gradient(135deg, #dc2626, #b91c1c);
}

[data-theme="dark"] .modern-input {
    background: rgba(31, 41, 55, 0.9);
    border-color: rgba(75, 85, 99, 0.5);
    color: #f9fafb;
}

[data-theme="dark"] .modern-input:focus {
    border-color: #dc2626;
    box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.1);
}

[data-theme="dark"] .video-details-card {
    background: linear-gradient(135deg, rgba(31, 41, 55, 0.98), rgba(17, 24, 39, 0.95));
    border: 1px solid rgba(220, 38, 38, 0.2);
}

[data-theme="dark"] .video-title {
    color: #f9fafb;
}

[data-theme="dark"] .video-description {
    color: #d1d5db;
}

[data-theme="dark"] .stat-card {
    background: rgba(31, 41, 55, 0.95);
    border: 1px solid rgba(75, 85, 99, 0.3);
}

[data-theme="dark"] .stat-number {
    color: #f9fafb;
}

[data-theme="dark"] .stat-label {
    color: #9ca3af;
}

[data-theme="dark"] .modern-tabs {
    background: rgba(31, 41, 55, 0.8);
}

[data-theme="dark"] .modern-tabs .nav-link {
    color: #9ca3af;
}

[data-theme="dark"] .modern-tabs .nav-link:hover {
    background: rgba(220, 38, 38, 0.1);
    color: #dc2626;
}

[data-theme="dark"] .modern-tabs .nav-link.active {
    background: linear-gradient(135deg, #dc2626, #b91c1c);
    color: white;
}

[data-theme="dark"] .modern-chart {
    background: linear-gradient(135deg, rgba(31, 41, 55, 0.98), rgba(17, 24, 39, 0.95));
    border: 1px solid rgba(75, 85, 99, 0.3);
}

/* Responsive Design */
@media (max-width: 768px) {
    .video-title {
        font-size: 1.2rem;
    }
    
    .video-actions {
        flex-direction: column;
        width: 100%;
    }
    
    .video-actions .btn {
        width: 100%;
    }
    
    .stat-card {
        padding: 16px;
    }
    
    .stat-number {
        font-size: 1.5rem;
    }
    
    .modern-tabs .nav-link {
        padding: 10px 16px;
        font-size: 0.9rem;
    }
    
    .modern-chart {
        padding: 16px;
    }
}

@media (max-width: 480px) {
    .video-thumbnail {
        height: 150px;
    }
    
    .video-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }
    
    .performance-stats .col-6 {
        margin-bottom: 1rem;
    }
    
    .stat-card {
        flex-direction: column;
        text-align: center;
        gap: 12px;
    }
    
    .stat-icon {
        width: 60px;
        height: 60px;
        font-size: 1.5rem;
    }
}

.dashboard-container {
    display: flex;
    height: 100vh;
}

/* Enhanced Top Navigation */
.top-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 70px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    z-index: 1000;
    box-shadow: var(--shadow-md);
}

.nav-left {
    display: flex;
    align-items: center;
    gap: 16px;
    flex: 1;
    max-width: 400px;
}

.nav-center {
    flex: 2;
    display: flex;
    justify-content: center;
    max-width: 600px;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 16px;
    flex: 1;
    justify-content: flex-end;
    max-width: 400px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
    transition: var(--transition);
}

.nav-brand:hover {
    transform: scale(1.02);
}

.brand-logo {
    width: 40px;
    height: 40px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.2rem;
    box-shadow: var(--shadow-md);
}

.brand-text {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.brand-name {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--gray-900);
    line-height: 1;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.brand-tagline {
    font-size: 0.75rem;
    color: var(--gray-500);
    font-weight: 500;
    letter-spacing: 0.025em;
}

/* Search Bar */
.search-bar {
    position: relative;
    width: 100%;
    max-width: 400px;
}

.search-bar i {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--gray-400);
    font-size: 0.875rem;
}

.search-bar input {
    width: 100%;
    height: 40px;
    padding: 0 16px 0 44px;
    border: 1px solid var(--gray-200);
    border-radius: 20px;
    background: var(--gray-50);
    font-size: 0.875rem;
    transition: var(--transition);
    outline: none;
}

.search-bar input:focus {
    border-color: var(--primary-color);
    background: white;
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.search-bar input::placeholder {
    color: var(--gray-400);
}

/* Navigation Actions */
.nav-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-action-btn {
    position: relative;
    width: 40px;
    height: 40px;
    border: none;
    border-radius: 50%;
    background: var(--gray-50);
    color: var(--gray-600);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.875rem;
}

.nav-action-btn:hover {
    background: var(--primary-color);
    color: white;
    transform: scale(1.1);
    box-shadow: var(--shadow-md);
}

.notification-badge {
    position: absolute;
    top: -2px;
    right: -2px;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--danger-color);
    color: white;
    font-size: 0.625rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid white;
}

/* Enhanced Theme Toggle */
.theme-toggle {
    width: 40px;
    height: 40px;
    border: none;
    border-radius: 50%;
    background: var(--gray-50);
    color: var(--gray-600);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.875rem;
}

.theme-toggle:hover {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    transform: scale(1.1);
    box-shadow: var(--shadow-md);
}

.theme-toggle .icon {
    transition: var(--transition);
}

.theme-toggle:hover .icon {
    transform: rotate(180deg);
}

.sidebar-toggle {
    background: none;
    border: none;
    color: var(--gray-600);
    font-size: 1.25rem;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 8px;
    transition: var(--transition);
}

.sidebar-toggle:hover {
    background: var(--gray-100);
    color: var(--primary-color);
}

.user-menu {
    display: flex;
    align-items: center;
}

/* Adjust main content for top navigation */
main {
    margin-top: 70px !important;
}

/* Enhanced Sidebar with Modern Glassmorphism */
.sidebar {
    width: 280px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-right: 1px solid rgba(255, 255, 255, 0.2);
    color: var(--gray-800);
    position: fixed;
    height: 100vh;
    overflow-y: auto;
    z-index: 1000;
    transition: var(--transition);
    box-shadow: var(--shadow-xl);
}

.sidebar-header {
    padding: 24px;
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    margin: 16px;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
}

.sidebar-brand {
    display: flex;
    align-items: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: white;
    text-decoration: none;
    letter-spacing: -0.025em;
}

.sidebar-brand i {
    font-size: 1.8rem;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
}

.sidebar-toggle {
    background: rgba(255, 255, 255, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: white;
    font-size: 1.2rem;
    cursor: pointer;
    padding: 8px;
    border-radius: 8px;
    transition: var(--transition);
    backdrop-filter: blur(10px);
}

.sidebar-toggle:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(1.05);
}

.sidebar-nav {
    padding: 24px 16px;
}

.nav-item {
    margin-bottom: 4px;
}

.nav-link {
    display: flex;
    align-items: center;
    padding: 12px 16px;
    color: var(--gray-600);
    text-decoration: none;
    transition: var(--transition);
    border-radius: var(--border-radius);
    font-weight: 500;
    position: relative;
    overflow: hidden;
}

.nav-link::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 0;
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    transition: var(--transition);
    opacity: 0.1;
}

.nav-link:hover::before,
.nav-link.active::before {
    width: 100%;
}

.nav-link:hover,
.nav-link.active {
    background: linear-gradient(135deg, var(--primary-light), var(--primary-color));
    color: white;
    transform: translateX(4px);
    box-shadow: var(--shadow-md);
}

.nav-link i {
    margin-right: 12px;
    width: 20px;
    text-align: center;
    font-size: 1.1rem;
}

/* Enhanced Main Content */
.main-content {
    flex: 1;
    margin-left: 280px;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    background: var(--gray-50);
}

.top-bar {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 20px 32px;
    border-bottom: 1px solid var(--gray-200);
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 100;
}

.page-title {
    font-size: 1.875rem;
    font-weight: 700;
    color: var(--gray-900);
    margin: 0;
    letter-spacing: -0.025em;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.content-area {
    flex: 1;
    padding: 32px;
    overflow-y: auto;
    background: var(--gray-50);
}

/* Enhanced Loading Spinner with Modern Design */
.loading-spinner {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    height: 400px;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(20px);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-xl);
    animation: fadeIn 0.5s ease-in;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.loading-spinner .spinner-border {
    width: 3.5rem;
    height: 3.5rem;
    border-width: 3px;
    border-color: var(--primary-light);
    border-right-color: transparent;
    animation: spin 1s linear infinite;
}

.loading-spinner p {
    color: var(--gray-600);
    font-weight: 600;
    margin-top: 1.5rem;
    font-size: 1rem;
    letter-spacing: 0.025em;
}

/* Modern Button Styles */
.btn {
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    border-radius: var(--border-radius);
    font-weight: 600;
    letter-spacing: 0.025em;
    border: none;
    padding: 12px 24px;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: var(--transition);
}

.btn:hover::before {
    left: 100%;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn:active {
    transform: translateY(0);
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-color));
    box-shadow: var(--shadow-xl);
}

.btn-success {
    background: linear-gradient(135deg, var(--success-color), #059669);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-danger {
    background: linear-gradient(135deg, var(--danger-color), #dc2626);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-warning {
    background: linear-gradient(135deg, var(--warning-color), #d97706);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-info {
    background: linear-gradient(135deg, var(--info-color), #2563eb);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-outline-primary {
    background: transparent;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
}

.btn-outline-primary:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* Modern Alert Styles */
.alert {
    border: none;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
    animation: slideDown 0.4s ease-out;
    margin-bottom: 1.5rem;
    font-weight: 500;
    position: relative;
    overflow: hidden;
}

.alert::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
}

.alert-success {
    background: linear-gradient(135deg, #d1fae5 0%, #a7f3d0 100%);
    color: #065f46;
    border-left: 4px solid var(--success-color);
}

.alert-success::before {
    background: var(--success-color);
}

.alert-danger {
    background: linear-gradient(135deg, #fee2e2 0%, #fecaca 100%);
    color: #991b1b;
    border-left: 4px solid var(--danger-color);
}

.alert-danger::before {
    background: var(--danger-color);
}

.alert-warning {
    background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
    color: #92400e;
    border-left: 4px solid var(--warning-color);
}

.alert-warning::before {
    background: var(--warning-color);
}

.alert-info {
    background: linear-gradient(135deg, #dbeafe 0%, #bfdbfe 100%);
    color: #1e40af;
    border-left: 4px solid var(--info-color);
}

.alert-info::before {
    background: var(--info-color);
}

/* Modern Form Controls */
.form-control {
    border: 2px solid var(--gray-200);
    border-radius: var(--border-radius);
    padding: 12px 16px;
    font-size: 0.875rem;
    transition: var(--transition);
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    font-weight: 500;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
    background: rgba(255, 255, 255, 1);
}

.form-control.is-invalid {
    border-color: var(--danger-color);
    animation: shake 0.5s ease-in-out;
    box-shadow: 0 0 0 0.2rem rgba(239, 68, 68, 0.25);
}

.form-control.is-invalid:focus {
    border-color: var(--danger-color);
    box-shadow: 0 0 0 0.2rem rgba(239, 68, 68, 0.25);
}

/* Button Hover Effects */
.btn {
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.btn:active {
    transform: translateY(0);
}

/* Success Animation */
@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Shake Animation for Errors */
@keyframes shake {
    0%, 100% { transform: translateX(0); }
    10%, 30%, 50%, 70%, 90% { transform: translateX(-5px); }
    20%, 40%, 60%, 80% { transform: translateX(5px); }
}

/* Spin Animation */
@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* Enhanced Card Styles */
.card {
    transition: var(--transition);
    border: none;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    overflow: hidden;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-2xl);
}

.card-header {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.9), rgba(255, 255, 255, 0.7));
    border-bottom: 1px solid var(--gray-200);
    padding: 20px 24px;
    font-weight: 600;
    color: var(--gray-800);
    backdrop-filter: blur(10px);
}

.card-body {
    padding: 24px;
}

/* Enhanced Progress Bars */
.progress {
    height: 10px;
    border-radius: var(--border-radius);
    background-color: var(--gray-200);
    overflow: hidden;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.06);
}

.progress-bar {
    transition: width 0.8s cubic-bezier(0.4, 0, 0.2, 1);
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: var(--border-radius);
    position: relative;
    overflow: hidden;
}

.progress-bar::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

/* Loading Overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.9);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    backdrop-filter: blur(2px);
}

.loading-overlay .spinner-border {
    width: 4rem;
    height: 4rem;
}

/* Pulse Animation for Important Elements */
@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

.pulse {
    animation: pulse 2s infinite;
}

/* Fade In Animation */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 0.5s ease-in;
}

/* Content Transitions */
.content-area {
    animation: fadeIn 0.5s ease-in;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Chat Styles */
.chat-messages {
    height: 500px;
    overflow-y: auto;
    padding: 20px;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    scroll-behavior: smooth;
}

.message {
    margin-bottom: 20px;
    animation: messageSlide 0.3s ease-out;
    display: flex;
    align-items: flex-end;
}

.message.user {
    justify-content: flex-end;
}

.message.bot {
    justify-content: flex-start;
}

.chat-bubble {
    max-width: 70%;
    padding: 12px 16px;
    border-radius: 18px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    position: relative;
    word-wrap: break-word;
}

.message.user .chat-bubble {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-bottom-right-radius: 4px;
    margin-left: auto;
}

.message.bot .chat-bubble {
    background: white;
    color: #333;
    border-bottom-left-radius: 4px;
    margin-right: auto;
}

.chat-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    margin: 0 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.message.user .chat-avatar {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    order: 1;
}

.message.bot .chat-avatar {
    background: #007bff;
    color: white;
}

.chat-info {
    display: flex;
    align-items: center;
    margin-bottom: 4px;
    font-size: 12px;
    opacity: 0.8;
}

.message.user .chat-info {
    justify-content: flex-end;
}

.chat-message-content {
    margin: 0;
    line-height: 1.4;
}

.chat-timestamp {
    font-size: 11px;
    opacity: 0.7;
    margin-top: 4px;
}

.message.user .chat-timestamp {
    text-align: right;
}

/* Chat Input Area */
.chat-input-area {
    background: white;
    border-top: 1px solid #e3e6f0;
    padding: 20px;
}

.chat-input-group {
    display: flex;
    gap: 12px;
    align-items: flex-end;
}

.chat-input {
    flex: 1;
    border: 2px solid #e3e6f0;
    border-radius: 25px;
    padding: 12px 20px;
    font-size: 14px;
    transition: all 0.3s ease;
    resize: none;
    min-height: 48px;
    max-height: 120px;
}

.chat-input:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.chat-send-btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border: none;
    border-radius: 50%;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(102, 126, 234, 0.3);
}

.chat-send-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

.chat-send-btn:active {
    transform: scale(0.95);
}

.chat-send-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

/* Enhanced typing indicator */
.chat-bubble .typing-dots {
    display: flex;
    gap: 4px;
    align-items: center;
    padding: 8px 0;
}

.chat-bubble .typing-dots span {
    width: 6px;
    height: 6px;
    background-color: #6c757d;
    border-radius: 50%;
    animation: typing 1.4s infinite;
}

.chat-bubble .typing-dots span:nth-child(2) {
    animation-delay: 0.2s;
}

.chat-bubble .typing-dots span:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes messageSlide {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.typing-dots {
    display: flex;
    gap: 4px;
    align-items: center;
}

.typing-dots span {
    width: 8px;
    height: 8px;
    background-color: #6c757d;
    border-radius: 50%;
    animation: typing 1.4s infinite;
}

.typing-dots span:nth-child(2) {
    animation-delay: 0.2s;
}

.typing-dots span:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes typing {
    0%, 60%, 100% {
        transform: translateY(0);
    }
    30% {
        transform: translateY(-10px);
    }
}

/* Chart Container */
.chart-container {
    position: relative;
    height: 300px;
    width: 100%;
}

/* Modern Stat Cards */
.stat-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: var(--border-radius-lg);
    padding: 24px;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    border: 1px solid rgba(255, 255, 255, 0.2);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    transition: var(--transition);
}

.stat-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-2xl);
}

.stat-card:hover::before {
    width: 8px;
}

.stat-card-primary::before {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
}

.stat-card-success::before {
    background: linear-gradient(135deg, var(--success-color), #059669);
}

.stat-card-warning::before {
    background: linear-gradient(135deg, var(--warning-color), #d97706);
}

.stat-card-danger::before {
    background: linear-gradient(135deg, var(--danger-color), #dc2626);
}

.stat-icon {
    font-size: 2.5rem;
    margin-bottom: 16px;
    color: var(--gray-400);
    transition: var(--transition);
}

.stat-card:hover .stat-icon {
    color: var(--primary-color);
    transform: scale(1.1);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--gray-900);
    letter-spacing: -0.025em;
}

.stat-label {
    color: var(--gray-500);
    margin: 0;
    font-weight: 600;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Enhanced Quick Action Buttons */
.quick-action-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    padding: 20px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 2px solid var(--gray-200);
    border-radius: var(--border-radius-lg);
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    color: var(--gray-700);
    font-weight: 600;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.quick-action-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(99, 102, 241, 0.1), transparent);
    transition: var(--transition);
}

.quick-action-btn:hover::before {
    left: 100%;
}

.quick-action-btn:hover {
    background: rgba(255, 255, 255, 1);
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.quick-action-btn i {
    font-size: 1.5rem;
    margin-right: 12px;
    transition: var(--transition);
}

.quick-action-btn:hover i {
    transform: scale(1.2);
}

/* Enhanced Activity Feed */
.activity-item {
    display: flex;
    align-items: start;
    padding: 20px 0;
    border-bottom: 1px solid var(--gray-200);
    transition: var(--transition);
    padding-left: 16px;
    padding-right: 16px;
    border-radius: var(--border-radius);
}

.activity-item:hover {
    background: rgba(99, 102, 241, 0.05);
    padding-left: 20px;
}

.activity-item:last-child {
    border-bottom: none;
}

.activity-icon {
    margin-right: 16px;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-light), var(--primary-color));
    color: white;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.activity-item:hover .activity-icon {
    transform: scale(1.1);
    box-shadow: var(--shadow-lg);
}

.activity-content {
    flex: 1;
}

.activity-content p {
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--gray-800);
}

.activity-content small {
    color: var(--gray-500);
    font-weight: 500;
    font-size: 0.875rem;
}

/* Enhanced Status Items */
.status-item {
    margin-bottom: 20px;
    padding: 16px;
    background: rgba(255, 255, 255, 0.5);
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.status-item:hover {
    background: rgba(255, 255, 255, 0.8);
    transform: translateX(4px);
}

.status-item .d-flex {
    font-weight: 600;
    color: var(--gray-700);
}

.status-item .badge {
    font-weight: 600;
    padding: 6px 12px;
    border-radius: var(--border-radius);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Enhanced YouTube Stats */
.youtube-stats .stat-item {
    padding: 24px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    border: 1px solid rgba(255, 255, 255, 0.2);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.youtube-stats .stat-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #ff0000, #ff6b6b);
}

.youtube-stats .stat-item:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-2xl);
}

.youtube-stats .stat-item i {
    color: #ff0000;
    font-size: 2.5rem;
    margin-bottom: 16px;
    transition: var(--transition);
}

.youtube-stats .stat-item:hover i {
    transform: scale(1.2);
    color: #ff6b6b;
}

.youtube-stats h4 {
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--gray-900);
    font-size: 2rem;
    letter-spacing: -0.025em;
}

.youtube-stats p {
    color: var(--gray-500);
    font-weight: 600;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin: 0;
}

/* Enhanced Mobile Responsive */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        width: 320px;
    }
    
    .sidebar.show {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .content-area {
        padding: 20px;
    }
    
    .stat-card {
        margin-bottom: 20px;
    }
    
    .page-title {
        font-size: 1.5rem;
    }
    
    .card-body {
        padding: 16px;
    }
    
    .card-header {
        padding: 16px 20px;
    }
    
    .quick-action-btn {
        padding: 16px;
        font-size: 0.875rem;
    }
    
    .quick-action-btn i {
        font-size: 1.2rem;
    }
    
    .activity-item {
        padding: 16px 0;
    }
    
    .activity-icon {
        width: 40px;
        height: 40px;
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    .stat-icon {
        font-size: 2rem;
    }
    
    .youtube-stats .stat-item {
        padding: 20px;
    }
    
    .youtube-stats h4 {
        font-size: 1.75rem;
    }
    
    .youtube-stats .stat-item i {
        font-size: 2rem;
    }
}

/* Modern Sidebar Overlay */
.sidebar-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    z-index: 999;
    display: none;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.sidebar-overlay.show {
    display: block;
    opacity: 1;
}

/* Enhanced User Menu */
.user-menu .dropdown-toggle {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border: none;
    color: white;
    padding: 10px 20px;
    border-radius: var(--border-radius);
    font-weight: 600;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.user-menu .dropdown-toggle:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-color));
}

.dropdown-menu {
    border: none;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-xl);
    padding: 8px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.dropdown-item {
    border-radius: var(--border-radius);
    padding: 12px 16px;
    transition: var(--transition);
    font-weight: 500;
    color: var(--gray-700);
}

.dropdown-item:hover {
    background: linear-gradient(135deg, var(--primary-light), var(--primary-color));
    color: white;
    transform: translateX(4px);
}

/* Enhanced Badges */
.badge {
    font-weight: 600;
    padding: 6px 12px;
    border-radius: var(--border-radius);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border: none;
}

.badge.bg-success {
    background: linear-gradient(135deg, var(--success-color), #059669) !important;
    box-shadow: 0 2px 4px rgba(16, 185, 129, 0.3);
}

.badge.bg-warning {
    background: linear-gradient(135deg, var(--warning-color), #d97706) !important;
    box-shadow: 0 2px 4px rgba(245, 158, 11, 0.3);
}

.badge.bg-danger {
    background: linear-gradient(135deg, var(--danger-color), #dc2626) !important;
    box-shadow: 0 2px 4px rgba(239, 68, 68, 0.3);
}

.badge.bg-info {
    background: linear-gradient(135deg, var(--info-color), #2563eb) !important;
    box-shadow: 0 2px 4px rgba(59, 130, 246, 0.3);
}

/* Enhanced Tables */
.table {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.table thead th {
    background: linear-gradient(135deg, var(--primary-light), var(--primary-color));
    color: white;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-size: 0.875rem;
    border: none;
    padding: 16px;
}

.table tbody tr {
    transition: var(--transition);
}

.table tbody tr:hover {
    background: rgba(99, 102, 241, 0.05);
    transform: scale(1.01);
}

.table tbody td {
    padding: 16px;
    vertical-align: middle;
    border-top: 1px solid var(--gray-200);
    font-weight: 500;
    color: var(--gray-700);
}

/* Enhanced Forms */
.form-label {
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: 8px;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.form-text {
    color: var(--gray-500);
    font-size: 0.875rem;
    font-weight: 500;
    margin-top: 6px;
}

.input-group {
    position: relative;
}

.input-group .form-control {
    border-right: none;
}

.input-group .btn {
    border-left: none;
    position: relative;
    z-index: 1;
}

.input-group .form-control:focus {
    border-color: var(--primary-color);
    z-index: 2;
}

.input-group .btn:focus {
    z-index: 3;
}

/* Enhanced Chart Container */
.chart-container {
    position: relative;
    height: 350px;
    width: 100%;
    background: rgba(255, 255, 255, 0.5);
    border-radius: var(--border-radius);
    padding: 20px;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.06);
}

/* Modern Tooltips */
.tooltip {
    font-size: 0.875rem;
    font-weight: 600;
}

.tooltip .tooltip-arrow {
    display: none;
}

.tooltip .tooltip-inner {
    background: linear-gradient(135deg, var(--gray-900), var(--gray-700));
    color: white;
    border-radius: var(--border-radius);
    padding: 8px 12px;
    box-shadow: var(--shadow-lg);
    border: none;
}

/* Enhanced Modal */
.modal-content {
    border: none;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-2xl);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.modal-header {
    background: linear-gradient(135deg, var(--primary-light), var(--primary-color));
    color: white;
    border: none;
    border-radius: var(--border-radius-lg) var(--border-radius-lg) 0 0;
    padding: 20px 24px;
}

.modal-title {
    font-weight: 700;
    letter-spacing: -0.025em;
}

.modal-body {
    padding: 24px;
}

.modal-footer {
    border-top: 1px solid var(--gray-200);
    padding: 20px 24px;
}

/* ========== ENHANCED USER MENU & NAVIGATION ========== */

/* User Dropdown Button */
.user-dropdown-btn {
    background: rgba(255, 255, 255, 0.1) !important;
    border: 1px solid rgba(255, 255, 255, 0.2) !important;
    color: white !important;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    transition: var(--transition);
    border-radius: var(--border-radius);
    padding: 8px 16px;
    font-weight: 500;
}

.user-dropdown-btn:hover {
    background: rgba(255, 255, 255, 0.2) !important;
    border-color: rgba(255, 255, 255, 0.3) !important;
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

.user-dropdown-btn:focus {
    background: rgba(255, 255, 255, 0.15) !important;
    border-color: rgba(255, 255, 255, 0.4) !important;
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.1);
}

/* User Dropdown Menu */
.user-dropdown-menu {
    background: rgba(255, 255, 255, 0.98) !important;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.3) !important;
    border-radius: var(--border-radius-lg) !important;
    box-shadow: var(--shadow-xl) !important;
    padding: 8px;
    min-width: 200px;
    margin-top: 8px;
}

.user-dropdown-menu .dropdown-item {
    background: transparent !important;
    border: none !important;
    color: var(--gray-700) !important;
    padding: 12px 16px !important;
    border-radius: var(--border-radius) !important;
    font-weight: 500;
    transition: var(--transition);
    display: flex;
    align-items: center;
    margin-bottom: 4px;
}

.user-dropdown-menu .dropdown-item:hover {
    background: var(--primary-color) !important;
    color: white !important;
    transform: translateX(4px);
}

.user-dropdown-menu .dropdown-item i {
    width: 20px;
    text-align: center;
    opacity: 0.7;
    transition: var(--transition);
}

.user-dropdown-menu .dropdown-item:hover i {
    opacity: 1;
}

.user-dropdown-menu .dropdown-divider {
    margin: 8px 0;
    border-color: var(--gray-200);
}

/* Admin Panel Special Styling */
.user-dropdown-menu #adminPanelBtn {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color)) !important;
    color: white !important;
    font-weight: 600;
}

.user-dropdown-menu #adminPanelBtn:hover {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-color)) !important;
    transform: translateX(4px) scale(1.02);
}

/* Notification Button Enhancement */
.nav-action-btn {
    position: relative;
    background: rgba(255, 255, 255, 0.1) !important;
    border: 1px solid rgba(255, 255, 255, 0.2) !important;
    color: white !important;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    transition: var(--transition);
    border-radius: var(--border-radius);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
}

.nav-action-btn:hover {
    background: rgba(255, 255, 255, 0.2) !important;
    border-color: rgba(255, 255, 255, 0.3) !important;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.nav-action-btn:focus {
    background: rgba(255, 255, 255, 0.15) !important;
    border-color: rgba(255, 255, 255, 0.4) !important;
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.1);
}

.notification-badge {
    position: absolute;
    top: -4px;
    right: -4px;
    background: linear-gradient(135deg, var(--danger-color), #dc2626);
    color: white;
    border-radius: 50%;
    width: 18px;
    height: 18px;
    font-size: 10px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid rgba(255, 255, 255, 0.2);
    box-shadow: var(--shadow-md);
}

/* Theme Toggle Button */
.theme-toggle {
    background: rgba(255, 255, 255, 0.1) !important;
    border: 1px solid rgba(255, 255, 255, 0.2) !important;
    color: white !important;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    transition: var(--transition);
    border-radius: var(--border-radius);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
}

.theme-toggle:hover {
    background: rgba(255, 255, 255, 0.2) !important;
    border-color: rgba(255, 255, 255, 0.3) !important;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.theme-toggle:focus {
    background: rgba(255, 255, 255, 0.15) !important;
    border-color: rgba(255, 255, 255, 0.4) !important;
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.1);
}

/* User Menu Container */
.user-menu {
    display: flex;
    align-items: center;
    gap: 12px;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .user-dropdown-menu {
        min-width: 180px;
        margin-right: 8px;
    }
    
    .nav-action-btn,
    .theme-toggle {
        width: 36px;
        height: 36px;
        font-size: 14px;
    }
    
    .notification-badge {
        width: 16px;
        height: 16px;
        font-size: 9px;
    }
}