/* ========================================
   LiveStream - Premium Modern Design System
   ======================================== */

/* CSS Variables - Premium Color Palette */
:root {
    /* Primary Colors - Deep Blue Ocean */
    --primary-50: #eff6ff;
    --primary-100: #dbeafe;
    --primary-200: #bfdbfe;
    --primary-300: #93c5fd;
    --primary-400: #60a5fa;
    --primary-500: #3b82f6;
    --primary-600: #2563eb;
    --primary-700: #1d4ed8;
    --primary-800: #1e40af;
    --primary-900: #1e3a8a;
    --primary-950: #172554;
    
    /* Secondary Colors - Royal Purple */
    --secondary-50: #faf5ff;
    --secondary-100: #f3e8ff;
    --secondary-200: #e9d5ff;
    --secondary-300: #d8b4fe;
    --secondary-400: #c084fc;
    --secondary-500: #a855f7;
    --secondary-600: #9333ea;
    --secondary-700: #7e22ce;
    --secondary-800: #6b21a8;
    --secondary-900: #581c87;
    --secondary-950: #3b0764;
    
    /* Accent Colors - Vibrant Pink */
    --accent-50: #fdf2f8;
    --accent-100: #fce7f3;
    --accent-200: #fbcfe8;
    --accent-300: #f9a8d4;
    --accent-400: #f472b6;
    --accent-500: #ec4899;
    --accent-600: #db2777;
    --accent-700: #be185d;
    --accent-800: #9d174d;
    --accent-900: #831843;
    --accent-950: #500724;
    
    /* Success Colors - Emerald */
    --success-50: #ecfdf5;
    --success-100: #d1fae5;
    --success-200: #a7f3d0;
    --success-300: #6ee7b7;
    --success-400: #34d399;
    --success-500: #10b981;
    --success-600: #059669;
    --success-700: #047857;
    --success-800: #065f46;
    --success-900: #064e3b;
    
    /* Warning Colors - Amber */
    --warning-50: #fffbeb;
    --warning-100: #fef3c7;
    --warning-200: #fde68a;
    --warning-300: #fcd34d;
    --warning-400: #fbbf24;
    --warning-500: #f59e0b;
    --warning-600: #d97706;
    --warning-700: #b45309;
    --warning-800: #92400e;
    --warning-900: #78350f;
    
    /* Error Colors - Rose */
    --error-50: #fff1f2;
    --error-100: #ffe4e6;
    --error-200: #fecdd3;
    --error-300: #fda4af;
    --error-400: #fb7185;
    --error-500: #f43f5e;
    --error-600: #e11d48;
    --error-700: #be123c;
    --error-800: #9f1239;
    --error-900: #881337;
    
    /* Neutral Colors - Slate */
    --neutral-50: #f8fafc;
    --neutral-100: #f1f5f9;
    --neutral-200: #e2e8f0;
    --neutral-300: #cbd5e1;
    --neutral-400: #94a3b8;
    --neutral-500: #64748b;
    --neutral-600: #475569;
    --neutral-700: #334155;
    --neutral-800: #1e293b;
    --neutral-900: #0f172a;
    --neutral-950: #020617;
    
    /* Semantic Colors */
    --primary: var(--primary-600);
    --primary-dark: var(--primary-700);
    --primary-light: var(--primary-500);
    --secondary: var(--secondary-600);
    --secondary-dark: var(--secondary-700);
    --secondary-light: var(--secondary-500);
    --accent: var(--accent-500);
    --accent-dark: var(--accent-600);
    --accent-light: var(--accent-400);
    --success: var(--success-500);
    --success-dark: var(--success-600);
    --warning: var(--warning-500);
    --warning-dark: var(--warning-600);
    --error: var(--error-500);
    --error-dark: var(--error-600);
    
    /* Background Colors */
    --bg-primary: #ffffff;
    --bg-secondary: var(--neutral-50);
    --bg-tertiary: var(--neutral-100);
    --bg-dark: var(--neutral-900);
    --bg-dark-secondary: var(--neutral-800);
    
    /* Text Colors */
    --text-primary: var(--neutral-900);
    --text-secondary: var(--neutral-600);
    --text-tertiary: var(--neutral-400);
    --text-inverse: #ffffff;
    --text-muted: var(--neutral-500);
    
    /* Border Colors */
    --border-light: var(--neutral-200);
    --border-medium: var(--neutral-300);
    --border-dark: var(--neutral-400);
    
    /* Shadows - Premium Depth System */
    --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --shadow-3xl: 0 35px 60px -15px rgba(0, 0, 0, 0.3);
    --shadow-inner: inset 0 2px 4px 0 rgba(0, 0, 0, 0.05);
    --shadow-glow: 0 0 40px rgba(59, 130, 246, 0.15);
    --shadow-glow-lg: 0 0 60px rgba(59, 130, 246, 0.25);
    
    /* Gradients - Premium */
    --gradient-primary: linear-gradient(135deg, var(--primary-600) 0%, var(--primary-700) 100%);
    --gradient-secondary: linear-gradient(135deg, var(--secondary-600) 0%, var(--secondary-700) 100%);
    --gradient-accent: linear-gradient(135deg, var(--accent-500) 0%, var(--accent-600) 100%);
    --gradient-hero: linear-gradient(135deg, var(--primary-600) 0%, var(--secondary-600) 50%, var(--accent-500) 100%);
    --gradient-card: linear-gradient(145deg, #ffffff 0%, var(--neutral-50) 100%);
    --gradient-dark: linear-gradient(135deg, var(--neutral-900) 0%, var(--neutral-800) 100%);
    --gradient-mesh: radial-gradient(at 40% 20%, var(--primary-400) 0px, transparent 50%),
                     radial-gradient(at 80% 0%, var(--secondary-400) 0px, transparent 50%),
                     radial-gradient(at 0% 50%, var(--accent-400) 0px, transparent 50%),
                     radial-gradient(at 80% 50%, var(--primary-300) 0px, transparent 50%),
                     radial-gradient(at 0% 100%, var(--secondary-300) 0px, transparent 50%),
                     radial-gradient(at 80% 100%, var(--accent-300) 0px, transparent 50%);
    
    /* Border Radius - Modern Curves */
    --radius-xs: 0.25rem;
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.25rem;
    --radius-3xl: 1.5rem;
    --radius-full: 9999px;
    
    /* Spacing - 8px Base Grid */
    --space-0: 0;
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-7: 1.75rem;
    --space-8: 2rem;
    --space-9: 2.25rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-14: 3.5rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-24: 6rem;
    --space-28: 7rem;
    --space-32: 8rem;
    
    /* Typography - Premium Font Stack */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', 'SF Mono', Monaco, Inconsolata, 'Roboto Mono', Consolas, monospace;
    --font-display: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    
    /* Font Sizes - Modular Scale */
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 1.875rem;
    --text-4xl: 2.25rem;
    --text-5xl: 3rem;
    --text-6xl: 3.75rem;
    --text-7xl: 4.5rem;
    --text-8xl: 6rem;
    
    /* Line Heights */
    --leading-none: 1;
    --leading-tight: 1.25;
    --leading-snug: 1.375;
    --leading-normal: 1.5;
    --leading-relaxed: 1.625;
    --leading-loose: 2;
    
    /* Letter Spacing */
    --tracking-tighter: -0.05em;
    --tracking-tight: -0.025em;
    --tracking-normal: 0;
    --tracking-wide: 0.025em;
    --tracking-wider: 0.05em;
    --tracking-widest: 0.1em;
    
    /* Transitions - Smooth & Natural */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slower: 500ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-spring: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);
    
    /* 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;
    --z-toast: 1080;
}

/* ========================================
   Base Styles - Foundation
   ======================================== */

*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

body {
    font-family: var(--font-sans);
    font-size: var(--text-base);
    line-height: var(--leading-normal);
    color: var(--text-primary);
    background-color: var(--bg-secondary);
    overflow-x: hidden;
}

/* Selection */
::selection {
    background-color: var(--primary-600);
    color: var(--text-inverse);
}

::-moz-selection {
    background-color: var(--primary-600);
    color: var(--text-inverse);
}

/* Scrollbar - Premium */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: var(--neutral-100);
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, var(--primary-400) 0%, var(--secondary-400) 100%);
    border-radius: var(--radius-full);
    border: 2px solid var(--neutral-100);
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(180deg, var(--primary-500) 0%, var(--secondary-500) 100%);
}

/* Focus Styles */
*:focus {
    outline: none;
}

*:focus-visible {
    outline: 2px solid var(--primary-500);
    outline-offset: 2px;
}

/* Links */
a {
    color: var(--primary-600);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--primary-700);
}

/* Images */
img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* Lists */
ul, ol {
    list-style: none;
}

/* ========================================
   Layout Components
   ======================================== */

.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--space-6);
}

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

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

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

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

.container-2xl {
    max-width: 1536px;
}

/* ========================================
   Header - Premium Navigation
   ======================================== */

.header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--border-light);
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    transition: all var(--transition-slow);
}

.header.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow-md);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-4) 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-size: var(--text-2xl);
    font-weight: 800;
    color: var(--text-primary);
    text-decoration: none;
    transition: transform var(--transition-spring);
    position: relative;
}

.logo::before {
    content: '';
    position: absolute;
    inset: -8px;
    background: var(--gradient-primary);
    border-radius: var(--radius-xl);
    opacity: 0;
    transform: scale(0.8);
    transition: all var(--transition-slow);
    z-index: -1;
}

.logo:hover::before {
    opacity: 0.1;
    transform: scale(1);
}

.logo:hover {
    transform: scale(1.05);
}

.logo i {
    font-size: var(--text-3xl);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav ul {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.nav a {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-5);
    color: var(--text-secondary);
    font-weight: 600;
    font-size: var(--text-sm);
    border-radius: var(--radius-full);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.nav a::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.nav a:hover {
    color: var(--primary-600);
    background: var(--primary-50);
    transform: translateY(-2px);
}

.nav a.active {
    background: var(--gradient-primary);
    color: var(--text-inverse);
    box-shadow: var(--shadow-md);
}

.nav a i {
    font-size: var(--text-base);
}

/* ========================================
   Hero Section - Premium Landing
   ======================================== */

.hero {
    position: relative;
    min-height: 70vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-hero);
    overflow: hidden;
    padding: var(--space-20) 0;
}

.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--gradient-mesh);
    opacity: 0.3;
    animation: meshMove 20s ease-in-out infinite;
}

.hero::after {
    content: '';
    position: absolute;
    inset: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    opacity: 0.5;
}

@keyframes meshMove {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }
    25% {
        transform: translate(5%, 5%) scale(1.05);
    }
    50% {
        transform: translate(-5%, 10%) scale(1);
    }
    75% {
        transform: translate(10%, -5%) scale(1.05);
    }
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 900px;
    padding: 0 var(--space-6);
}

.hero-content h1 {
    font-size: clamp(var(--text-4xl), 8vw, var(--text-7xl));
    font-weight: 900;
    color: var(--text-inverse);
    margin-bottom: var(--space-6);
    line-height: var(--leading-tight);
    letter-spacing: var(--tracking-tight);
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
    animation: fadeInUp 0.8s ease-out;
}

.hero-content p {
    font-size: clamp(var(--text-lg), 2.5vw, var(--text-xl));
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--space-10);
    line-height: var(--leading-relaxed);
    animation: fadeInUp 0.8s ease-out 0.2s both;
}

.hero-buttons {
    display: flex;
    justify-content: center;
    gap: var(--space-4);
    flex-wrap: wrap;
    animation: fadeInUp 0.8s ease-out 0.4s both;
}

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

/* ========================================
   Buttons - Premium Interactive
   ======================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-4) var(--space-8);
    font-family: var(--font-sans);
    font-size: var(--text-base);
    font-weight: 700;
    line-height: var(--leading-tight);
    text-align: center;
    text-decoration: none;
    border: none;
    border-radius: var(--radius-xl);
    cursor: pointer;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.2) 0%, rgba(255, 255, 255, 0) 100%);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.btn::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at center, rgba(255, 255, 255, 0.3) 0%, transparent 70%);
    opacity: 0;
    transform: scale(0);
    transition: all var(--transition-slow);
}

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

.btn:hover::after {
    opacity: 1;
    transform: scale(2);
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--text-inverse);
    box-shadow: var(--shadow-lg), 0 0 0 0 rgba(59, 130, 246, 0.5);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl), 0 0 30px rgba(59, 130, 246, 0.4);
}

.btn-secondary {
    background: var(--bg-primary);
    color: var(--primary-600);
    box-shadow: var(--shadow-lg);
}

.btn-secondary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl);
    background: var(--primary-50);
}

.btn-accent {
    background: var(--gradient-accent);
    color: var(--text-inverse);
    box-shadow: var(--shadow-lg);
}

.btn-accent:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl);
}

.btn-outline {
    background: transparent;
    color: var(--text-inverse);
    border: 2px solid rgba(255, 255, 255, 0.5);
    backdrop-filter: blur(10px);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.8);
    transform: translateY(-3px);
}

.btn i {
    font-size: var(--text-lg);
}

/* ========================================
   Video Grid & Cards - Premium Display
   ======================================== */

.video-list {
    padding: var(--space-20) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-16);
    position: relative;
}

.section-header::before {
    content: '';
    position: absolute;
    top: -40px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
}

.section-header h2 {
    font-size: clamp(var(--text-3xl), 5vw, var(--text-5xl));
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: var(--space-4);
    letter-spacing: var(--tracking-tight);
}

.section-header p {
    font-size: var(--text-lg);
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: var(--space-8);
}

.video-card {
    background: var(--bg-primary);
    border-radius: var(--radius-2xl);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-slow);
    position: relative;
    transform-style: preserve-3d;
    perspective: 1000px;
}

.video-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity var(--transition-slow);
    z-index: 0;
}

.video-card:hover {
    transform: translateY(-12px) rotateX(2deg);
    box-shadow: var(--shadow-2xl), var(--shadow-glow);
}

.video-card:hover::before {
    opacity: 0.02;
}

.video-card a {
    text-decoration: none;
    color: inherit;
    display: block;
    position: relative;
    z-index: 1;
}

.video-thumbnail {
    position: relative;
    height: 220px;
    overflow: hidden;
    background: var(--gradient-hero);
}

.video-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slower);
}

.video-card:hover .video-thumbnail img {
    transform: scale(1.1);
}

.placeholder-thumbnail {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.placeholder-thumbnail::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(45deg, transparent 30%, rgba(255, 255, 255, 0.1) 50%, transparent 70%);
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% {
        transform: translateX(-100%);
    }
    100% {
        transform: translateX(100%);
    }
}

.placeholder-thumbnail i {
    font-size: 4rem;
    color: rgba(255, 255, 255, 0.8);
    z-index: 1;
}

.duration {
    position: absolute;
    bottom: var(--space-3);
    right: var(--space-3);
    background: rgba(0, 0, 0, 0.85);
    color: var(--text-inverse);
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-md);
    font-size: var(--text-xs);
    font-weight: 700;
    backdrop-filter: blur(10px);
    letter-spacing: var(--tracking-wide);
}

.video-info {
    padding: var(--space-6);
}

.video-info h3 {
    font-size: var(--text-lg);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-3);
    line-height: var(--leading-snug);
    transition: color var(--transition-base);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.video-card:hover .video-info h3 {
    color: var(--primary-600);
}

.video-info p {
    font-size: var(--text-sm);
    color: var(--text-secondary);
    line-height: var(--leading-relaxed);
    margin-bottom: var(--space-4);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.video-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: var(--text-xs);
    color: var(--text-tertiary);
    padding-top: var(--space-3);
    border-top: 1px solid var(--border-light);
}

.video-meta span {
    display: flex;
    align-items: center;
    gap: var(--space-1);
}

.video-meta i {
    font-size: var(--text-xs);
}

/* ========================================
   Video Player Page - Premium Experience
   ======================================== */

.video-player {
    background: var(--bg-primary);
    border-radius: var(--radius-3xl);
    padding: var(--space-8);
    box-shadow: var(--shadow-2xl);
    margin: var(--space-12) 0;
    position: relative;
    overflow: hidden;
}

.video-player::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-hero);
}

.player-container {
    position: relative;
    padding-bottom: 56.25%;
    height: 0;
    overflow: hidden;
    margin-bottom: var(--space-8);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-xl);
    background: var(--neutral-900);
}

.custom-player-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.custom-player-container video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.custom-controls {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.9) 0%, rgba(0, 0, 0, 0) 100%);
    color: var(--text-inverse);
    padding: var(--space-6);
    display: flex;
    align-items: center;
    gap: var(--space-4);
    opacity: 0;
    transition: opacity var(--transition-base);
    backdrop-filter: blur(10px);
}

.custom-player-container:hover .custom-controls {
    opacity: 1;
}

.control-btn {
    background: rgba(255, 255, 255, 0.15);
    border: none;
    color: var(--text-inverse);
    font-size: var(--text-xl);
    cursor: pointer;
    padding: var(--space-3);
    border-radius: var(--radius-full);
    transition: all var(--transition-base);
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(10px);
}

.control-btn:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: scale(1.1);
}

.progress-container {
    flex: 1;
    height: 6px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-full);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
    width: 0%;
    transition: width 0.1s ease;
    position: relative;
}

.progress-bar::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    animation: progressShine 2s infinite;
}

@keyframes progressShine {
    0% {
        transform: translateX(-100%);
    }
    100% {
        transform: translateX(100%);
    }
}

.time-display {
    font-size: var(--text-sm);
    font-weight: 600;
    min-width: 90px;
    text-align: right;
    font-family: var(--font-mono);
}

.video-details h2 {
    font-size: var(--text-3xl);
    font-weight: 800;
    margin-bottom: var(--space-6);
    color: var(--text-primary);
    letter-spacing: var(--tracking-tight);
}

.video-details p {
    font-size: var(--text-lg);
    color: var(--text-secondary);
    margin-bottom: var(--space-8);
    line-height: var(--leading-relaxed);
}

.contact-buttons {
    display: flex;
    gap: var(--space-4);
    margin: var(--space-8) 0;
    flex-wrap: wrap;
}

.contact-btn {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-4) var(--space-6);
    background: var(--gradient-primary);
    color: var(--text-inverse);
    border: none;
    border-radius: var(--radius-xl);
    font-weight: 700;
    font-size: var(--text-base);
    cursor: pointer;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-lg);
    text-decoration: none;
    position: relative;
    overflow: hidden;
}

.contact-btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.2) 0%, rgba(255, 255, 255, 0) 100%);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.contact-btn:hover::before {
    opacity: 1;
}

.contact-btn i {
    font-size: var(--text-xl);
}

.contact-btn:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl);
}

.contact-btn.whatsapp {
    background: linear-gradient(135deg, #25D366 0%, #128C7E 100%);
}

.contact-btn.line {
    background: linear-gradient(135deg, #00C300 0%, #008000 100%);
}

.contact-btn.wechat {
    background: linear-gradient(135deg, #07C160 0%, #008000 100%);
}

/* ========================================
   Footer - Premium Bottom
   ======================================== */

.footer {
    background: var(--gradient-dark);
    color: var(--text-inverse);
    padding: var(--space-20) 0 var(--space-8);
    margin-top: var(--space-20);
    position: relative;
    overflow: hidden;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-hero);
}

.footer::after {
    content: '';
    position: absolute;
    inset: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.02'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    opacity: 0.5;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-12);
    margin-bottom: var(--space-12);
    position: relative;
    z-index: 1;
}

.footer-info h3 {
    font-size: var(--text-2xl);
    font-weight: 800;
    margin-bottom: var(--space-6);
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.footer-info p {
    color: var(--neutral-400);
    line-height: var(--leading-relaxed);
    margin-bottom: var(--space-6);
}

.social-links {
    display: flex;
    gap: var(--space-3);
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: var(--neutral-800);
    border-radius: var(--radius-full);
    color: var(--text-inverse);
    transition: all var(--transition-base);
    text-decoration: none;
}

.social-link:hover {
    background: var(--gradient-primary);
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.footer-links h4,
.footer-contact h4 {
    font-size: var(--text-lg);
    font-weight: 700;
    margin-bottom: var(--space-6);
    position: relative;
    padding-bottom: var(--space-3);
}

.footer-links h4::after,
.footer-contact h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 3px;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
}

.footer-links ul {
    list-style: none;
}

.footer-links li {
    margin-bottom: var(--space-3);
}

.footer-links a {
    color: var(--neutral-400);
    text-decoration: none;
    transition: all var(--transition-base);
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.footer-links a:hover {
    color: var(--text-inverse);
    transform: translateX(5px);
}

.footer-contact ul {
    list-style: none;
}

.footer-contact li {
    margin-bottom: var(--space-4);
}

.footer-contact a {
    color: var(--neutral-400);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: var(--space-3);
    transition: all var(--transition-base);
}

.footer-contact a:hover {
    color: var(--text-inverse);
}

.footer-contact i {
    font-size: var(--text-xl);
    width: 24px;
}

.footer-bottom {
    border-top: 1px solid var(--neutral-800);
    padding-top: var(--space-8);
    text-align: center;
    position: relative;
    z-index: 1;
}

.footer-bottom p {
    color: var(--neutral-500);
    font-size: var(--text-sm);
}

/* ========================================
   Auth Pages - Premium Login/Register
   ======================================== */

.auth-container {
    max-width: 480px;
    margin: var(--space-20) auto;
    background: var(--bg-primary);
    padding: var(--space-12);
    border-radius: var(--radius-3xl);
    box-shadow: var(--shadow-2xl);
    position: relative;
    overflow: hidden;
}

.auth-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-hero);
}

.auth-container h2 {
    text-align: center;
    font-size: var(--text-3xl);
    font-weight: 800;
    margin-bottom: var(--space-8);
    color: var(--text-primary);
}

.form-group {
    margin-bottom: var(--space-6);
}

.form-group label {
    display: block;
    margin-bottom: var(--space-2);
    font-weight: 600;
    font-size: var(--text-sm);
    color: var(--text-secondary);
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: var(--space-4) var(--space-5);
    border: 2px solid var(--border-light);
    border-radius: var(--radius-xl);
    font-size: var(--text-base);
    font-family: var(--font-sans);
    background: var(--bg-secondary);
    color: var(--text-primary);
    transition: all var(--transition-base);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-500);
    background: var(--bg-primary);
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.1);
    transform: translateY(-2px);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.auth-btn {
    width: 100%;
    padding: var(--space-4);
    background: var(--gradient-primary);
    color: var(--text-inverse);
    border: none;
    border-radius: var(--radius-xl);
    font-size: var(--text-base);
    font-weight: 700;
    cursor: pointer;
    transition: all var(--transition-base);
    margin-top: var(--space-4);
    position: relative;
    overflow: hidden;
}

.auth-btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.2) 0%, rgba(255, 255, 255, 0) 100%);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.auth-btn:hover::before {
    opacity: 1;
}

.auth-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

.auth-links {
    text-align: center;
    margin-top: var(--space-6);
}

.auth-links a {
    color: var(--primary-600);
    font-weight: 600;
    text-decoration: none;
    transition: color var(--transition-base);
}

.auth-links a:hover {
    color: var(--primary-700);
}

/* ========================================
   Profile Page - Premium User Center
   ======================================== */

.profile-container {
    max-width: 1000px;
    margin: var(--space-12) auto;
    background: var(--bg-primary);
    border-radius: var(--radius-3xl);
    box-shadow: var(--shadow-2xl);
    overflow: hidden;
}

.profile-header {
    background: var(--gradient-hero);
    color: var(--text-inverse);
    padding: var(--space-16);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.profile-header::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--gradient-mesh);
    opacity: 0.2;
    animation: meshMove 20s ease-in-out infinite;
}

.profile-header h2 {
    font-size: var(--text-4xl);
    font-weight: 800;
    margin-bottom: var(--space-3);
    position: relative;
    z-index: 1;
}

.profile-header p {
    font-size: var(--text-lg);
    opacity: 0.9;
    position: relative;
    z-index: 1;
}

.profile-content {
    padding: var(--space-10);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--space-6);
    margin-bottom: var(--space-12);
}

.stat-card {
    background: var(--bg-secondary);
    padding: var(--space-8);
    border-radius: var(--radius-2xl);
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-slow);
    border-top: 4px solid var(--primary-500);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(59, 130, 246, 0.1), transparent);
    transition: transform var(--transition-slower);
}

.stat-card:hover::before {
    transform: translateX(200%);
}

.stat-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-top-color: var(--secondary-500);
}

.stat-card i {
    font-size: var(--text-4xl);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--space-4);
    transition: transform var(--transition-base);
}

.stat-card:hover i {
    transform: scale(1.1);
}

.stat-card h4 {
    font-size: var(--text-sm);
    font-weight: 700;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: var(--tracking-wider);
    margin-bottom: var(--space-2);
}

.stat-card p {
    font-size: var(--text-4xl);
    font-weight: 800;
    color: var(--text-primary);
    font-family: var(--font-mono);
}

.section {
    margin-bottom: var(--space-12);
    padding: var(--space-8);
    background: var(--bg-secondary);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
}

.section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--gradient-primary);
}

.section h3 {
    font-size: var(--text-2xl);
    font-weight: 700;
    margin-bottom: var(--space-6);
    color: var(--text-primary);
    padding-bottom: var(--space-3);
    border-bottom: 2px solid var(--border-light);
}

.user-info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-6);
}

.info-item {
    background: var(--bg-primary);
    padding: var(--space-5);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
}

.info-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.info-item label {
    font-size: var(--text-xs);
    font-weight: 700;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: var(--tracking-wider);
    margin-bottom: var(--space-2);
    display: block;
}

.info-item value {
    font-size: var(--text-lg);
    font-weight: 600;
    color: var(--text-primary);
}

.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: var(--space-6);
}

.mini-video-card {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-slow);
}

.mini-video-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.mini-video-thumbnail {
    position: relative;
    height: 140px;
    overflow: hidden;
}

.mini-video-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slower);
}

.mini-video-card:hover .mini-video-thumbnail img {
    transform: scale(1.1);
}

.mini-placeholder-thumbnail {
    width: 100%;
    height: 100%;
    background: var(--gradient-hero);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-inverse);
}

.mini-placeholder-thumbnail i {
    font-size: var(--text-3xl);
    opacity: 0.8;
}

.mini-video-info {
    padding: var(--space-4);
}

.mini-video-info h4 {
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-2);
    line-height: var(--leading-snug);
}

.mini-video-info p {
    font-size: var(--text-xs);
    color: var(--text-tertiary);
}

/* ========================================
   Admin Panel - Premium Dashboard
   ======================================== */

.admin-container {
    display: flex;
    min-height: 100vh;
    background: var(--bg-secondary);
}

.admin-sidebar {
    width: 280px;
    background: var(--gradient-dark);
    color: var(--text-inverse);
    padding: var(--space-6);
    box-shadow: var(--shadow-2xl);
    position: fixed;
    height: 100vh;
    overflow-y: auto;
    transition: all var(--transition-slow);
    z-index: var(--z-fixed);
    border-right: 1px solid rgba(255, 255, 255, 0.05);
}

.admin-sidebar:hover {
    box-shadow: var(--shadow-2xl), var(--shadow-glow);
}

.admin-sidebar h3 {
    font-size: var(--text-xl);
    font-weight: 800;
    text-align: center;
    padding-bottom: var(--space-6);
    margin-bottom: var(--space-8);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-3);
    position: relative;
}

.admin-sidebar h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
}

.admin-sidebar ul {
    list-style: none;
}

.admin-sidebar li {
    margin-bottom: var(--space-2);
}

.admin-sidebar a {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-4) var(--space-5);
    color: var(--neutral-400);
    text-decoration: none;
    border-radius: var(--radius-xl);
    font-weight: 600;
    font-size: var(--text-sm);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.admin-sidebar a::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.05), transparent);
    transform: translateX(-100%);
    transition: transform var(--transition-slower);
}

.admin-sidebar a:hover::before {
    transform: translateX(100%);
}

.admin-sidebar a i,
.admin-sidebar a svg {
    width: 20px;
    font-size: var(--text-lg);
    transition: transform var(--transition-base);
}

.admin-sidebar a:hover {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-inverse);
    transform: translateX(8px);
}

.admin-sidebar a:hover i {
    transform: scale(1.1);
}

.admin-sidebar a.active {
    background: var(--gradient-primary);
    color: var(--text-inverse);
    box-shadow: var(--shadow-lg);
}

.admin-sidebar a.active:hover {
    transform: translateX(0);
}

.admin-content {
    flex: 1;
    padding: var(--space-8);
    margin-left: 280px;
    min-height: 100vh;
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--neutral-100) 100%);
}

.admin-header {
    background: var(--bg-primary);
    padding: var(--space-6);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-lg);
    margin-bottom: var(--space-8);
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.admin-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-hero);
}

.admin-header h2 {
    font-size: var(--text-2xl);
    font-weight: 800;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.admin-header h2 i {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.admin-header .user-info {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    background: var(--bg-secondary);
    padding: var(--space-3) var(--space-6);
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
}

.admin-header .user-info:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.admin-header .user-info span {
    font-weight: 600;
    color: var(--text-secondary);
}

.admin-card {
    background: var(--bg-primary);
    padding: var(--space-8);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-lg);
    margin-bottom: var(--space-8);
    transition: all var(--transition-slow);
    position: relative;
    overflow: hidden;
}

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

.admin-card:hover {
    box-shadow: var(--shadow-xl);
    transform: translateY(-2px);
}

.admin-card h3 {
    font-size: var(--text-xl);
    font-weight: 700;
    margin-bottom: var(--space-6);
    color: var(--text-primary);
    padding-bottom: var(--space-3);
    border-bottom: 2px solid var(--border-light);
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.admin-card h3 i {
    color: var(--primary-500);
}

/* Admin Stats Cards */
.stats-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-6);
    margin-bottom: var(--space-8);
}

.admin-stat-card {
    background: var(--bg-primary);
    padding: var(--space-8);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-lg);
    text-align: center;
    transition: all var(--transition-slow);
    border-top: 4px solid var(--primary-500);
    position: relative;
    overflow: hidden;
}

.admin-stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(59, 130, 246, 0.1), transparent);
    transition: transform var(--transition-slower);
}

.admin-stat-card:hover::before {
    transform: translateX(200%);
}

.admin-stat-card:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: var(--shadow-2xl);
    border-top-color: var(--secondary-500);
}

.admin-stat-card i {
    font-size: var(--text-5xl);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--space-4);
    transition: transform var(--transition-base);
    display: block;
}

.admin-stat-card:hover i {
    transform: scale(1.1) rotate(5deg);
}

.admin-stat-card h4 {
    font-size: var(--text-sm);
    font-weight: 700;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: var(--tracking-wider);
    margin-bottom: var(--space-2);
}

.admin-stat-card p {
    font-size: var(--text-4xl);
    font-weight: 800;
    color: var(--text-primary);
    font-family: var(--font-mono);
}

/* Admin Table */
.table {
    width: 100%;
    border-collapse: collapse;
    margin-top: var(--space-6);
    background: var(--bg-primary);
    border-radius: var(--radius-2xl);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.table th,
.table td {
    padding: var(--space-5);
    text-align: left;
    border-bottom: 1px solid var(--border-light);
    transition: all var(--transition-base);
}

.table th {
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--neutral-100) 100%);
    font-weight: 700;
    color: var(--text-secondary);
    font-size: var(--text-xs);
    text-transform: uppercase;
    letter-spacing: var(--tracking-wider);
    border-bottom: 2px solid var(--primary-500);
}

.table tr {
    transition: all var(--transition-base);
}

.table tr:hover {
    background: var(--bg-secondary);
    transform: translateY(-1px);
}

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

.table td {
    font-weight: 500;
    color: var(--text-primary);
}

.table td:first-child {
    font-weight: 700;
    color: var(--primary-600);
}

/* Admin Action Buttons */
.action-buttons {
    display: flex;
    gap: var(--space-3);
    flex-wrap: wrap;
}

.action-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-4);
    border: none;
    border-radius: var(--radius-lg);
    font-size: var(--text-sm);
    font-weight: 700;
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
    min-width: 90px;
    position: relative;
    overflow: hidden;
}

.action-btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.2) 0%, rgba(255, 255, 255, 0) 100%);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.action-btn:hover::before {
    opacity: 1;
}

.action-btn i {
    font-size: var(--text-sm);
}

.action-btn.edit {
    background: linear-gradient(135deg, var(--success-500) 0%, var(--success-600) 100%);
    color: var(--text-inverse);
}

.action-btn.delete {
    background: linear-gradient(135deg, var(--error-500) 0%, var(--error-600) 100%);
    color: var(--text-inverse);
}

.action-btn.view {
    background: var(--gradient-primary);
    color: var(--text-inverse);
}

.action-btn.warning {
    background: linear-gradient(135deg, var(--warning-500) 0%, var(--warning-600) 100%);
    color: var(--text-inverse);
}

.action-btn:hover {
    transform: translateY(-3px) scale(1.05);
    box-shadow: var(--shadow-lg);
}

/* Admin Form */
.admin-form .form-group {
    margin-bottom: var(--space-6);
}

.admin-form .form-group label {
    display: block;
    margin-bottom: var(--space-3);
    font-weight: 700;
    font-size: var(--text-sm);
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: var(--tracking-wider);
}

.admin-form .form-group input,
.admin-form .form-group textarea,
.admin-form .form-group select {
    width: 100%;
    padding: var(--space-4) var(--space-6);
    border: 2px solid var(--border-light);
    border-radius: var(--radius-xl);
    font-size: var(--text-base);
    font-family: var(--font-sans);
    background: var(--bg-secondary);
    color: var(--text-primary);
    transition: all var(--transition-base);
}

.admin-form .form-group input:focus,
.admin-form .form-group textarea:focus,
.admin-form .form-group select:focus {
    outline: none;
    border-color: var(--primary-500);
    background: var(--bg-primary);
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.1);
    transform: translateY(-2px);
}

.admin-form .form-group textarea {
    resize: vertical;
    min-height: 150px;
    line-height: var(--leading-relaxed);
}

.admin-form .form-group input[type="file"] {
    padding: var(--space-3);
    border: 2px dashed var(--border-medium);
    background: var(--neutral-100);
}

.admin-form .form-group input[type="file"]:hover {
    border-color: var(--primary-500);
    background: var(--bg-secondary);
}

/* Admin Button */
.admin-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-3);
    padding: var(--space-4) var(--space-8);
    background: var(--gradient-primary);
    color: var(--text-inverse);
    border: none;
    border-radius: var(--radius-xl);
    font-size: var(--text-base);
    font-weight: 700;
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: var(--tracking-wider);
    position: relative;
    overflow: hidden;
}

.admin-btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.2) 0%, rgba(255, 255, 255, 0) 100%);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.admin-btn:hover::before {
    opacity: 1;
}

.admin-btn:hover {
    transform: translateY(-3px) scale(1.05);
    box-shadow: var(--shadow-xl);
}

.admin-btn-secondary {
    background: linear-gradient(135deg, var(--neutral-500) 0%, var(--neutral-600) 100%);
}

.admin-btn-danger {
    background: linear-gradient(135deg, var(--error-500) 0%, var(--error-600) 100%);
}

/* Admin Notification */
.admin-notification {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    padding: var(--space-5);
    border-radius: var(--radius-xl);
    margin-bottom: var(--space-6);
    color: var(--text-inverse);
    font-weight: 600;
    box-shadow: var(--shadow-lg);
    position: relative;
    overflow: hidden;
    animation: slideInRight 0.5s ease;
}

.admin-notification::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.2) 0%, rgba(255, 255, 255, 0) 100%);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.admin-notification:hover::before {
    opacity: 1;
}

.admin-notification i {
    font-size: var(--text-2xl);
}

.admin-notification.success {
    background: linear-gradient(135deg, var(--success-500) 0%, var(--success-600) 100%);
}

.admin-notification.error {
    background: linear-gradient(135deg, var(--error-500) 0%, var(--error-600) 100%);
}

.admin-notification.warning {
    background: linear-gradient(135deg, var(--warning-500) 0%, var(--warning-600) 100%);
}

@keyframes slideInRight {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* System Info */
.system-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-6);
    margin-top: var(--space-6);
}

.system-info-card {
    background: var(--bg-secondary);
    padding: var(--space-6);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
}

.system-info-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.system-info-card h4 {
    font-size: var(--text-lg);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-4);
    padding-bottom: var(--space-2);
    border-bottom: 2px solid var(--border-light);
}

.system-info-card ul {
    list-style: none;
}

.system-info-card li {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-2) 0;
    border-bottom: 1px solid var(--border-light);
}

.system-info-card li:last-child {
    border-bottom: none;
}

.system-info-card li span:first-child {
    font-weight: 500;
    color: var(--text-secondary);
}

.system-info-card li span:last-child {
    font-weight: 700;
    color: var(--primary-600);
}

/* ========================================
   Modal - Premium Dialog
   ======================================== */

.modal {
    display: none;
    position: fixed;
    inset: 0;
    z-index: var(--z-modal);
    background-color: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(8px);
    animation: fadeIn 0.3s ease;
}

.modal-content {
    background: var(--bg-primary);
    margin: 10% auto;
    padding: var(--space-8);
    border-radius: var(--radius-3xl);
    width: 90%;
    max-width: 500px;
    animation: slideUp 0.3s ease;
    box-shadow: var(--shadow-3xl);
    position: relative;
    overflow: hidden;
}

.modal-content::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-hero);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-6);
}

.modal-header h3 {
    font-size: var(--text-2xl);
    font-weight: 800;
    color: var(--text-primary);
}

.close {
    font-size: var(--text-2xl);
    cursor: pointer;
    color: var(--text-tertiary);
    transition: all var(--transition-base);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
}

.close:hover {
    color: var(--text-primary);
    background: var(--bg-secondary);
    transform: rotate(90deg);
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideUp {
    from {
        transform: translateY(50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

/* ========================================
   Loading & Empty States
   ======================================== */

.loading {
    display: inline-block;
    width: 48px;
    height: 48px;
    border: 4px solid var(--border-light);
    border-top-color: var(--primary-500);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.admin-loading {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: var(--space-12);
}

.admin-empty {
    text-align: center;
    padding: var(--space-16);
    color: var(--text-secondary);
}

.admin-empty i {
    font-size: 5rem;
    margin-bottom: var(--space-6);
    color: var(--neutral-300);
}

.admin-empty h4 {
    font-size: var(--text-xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-4);
}

.admin-empty p {
    font-size: var(--text-base);
    color: var(--text-secondary);
    margin-bottom: var(--space-6);
}

/* ========================================
   Badges & Tooltips
   ======================================== */

.admin-badge {
    display: inline-flex;
    align-items: center;
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-full);
    font-size: var(--text-xs);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: var(--tracking-wider);
}

.admin-badge.success {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success-600);
}

.admin-badge.error {
    background: rgba(244, 63, 94, 0.1);
    color: var(--error-600);
}

.admin-badge.warning {
    background: rgba(245, 158, 11, 0.1);
    color: var(--warning-600);
}

.admin-badge.info {
    background: rgba(59, 130, 246, 0.1);
    color: var(--primary-600);
}

.admin-tooltip {
    position: relative;
    cursor: help;
}

.admin-tooltip::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--neutral-900);
    color: var(--text-inverse);
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-md);
    font-size: var(--text-xs);
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    z-index: var(--z-tooltip);
    margin-bottom: var(--space-2);
}

.admin-tooltip:hover::after {
    opacity: 1;
    visibility: visible;
}

/* ========================================
   Responsive Design
   ======================================== */

@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: var(--space-4);
    }

    .nav ul {
        flex-wrap: wrap;
        justify-content: center;
        gap: var(--space-2);
    }

    .hero {
        min-height: 60vh;
        padding: var(--space-12) 0;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .grid {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--space-8);
    }

    .admin-container {
        flex-direction: column;
    }

    .admin-sidebar {
        width: 100%;
        height: auto;
        position: relative;
        border-right: none;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }

    .admin-sidebar ul {
        display: flex;
        overflow-x: auto;
        gap: var(--space-3);
        padding-bottom: var(--space-4);
    }

    .admin-sidebar a {
        padding: var(--space-3) var(--space-4);
        white-space: nowrap;
    }

    .admin-content {
        margin-left: 0;
        padding: var(--space-4);
    }

    .admin-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-4);
    }

    .admin-header .user-info {
        width: 100%;
        justify-content: space-between;
    }

    .stats-cards {
        grid-template-columns: 1fr;
    }

    .table th,
    .table td {
        padding: var(--space-3);
        font-size: var(--text-sm);
    }

    .action-buttons {
        flex-direction: column;
    }

    .action-btn {
        width: 100%;
    }

    .system-info {
        grid-template-columns: 1fr;
    }

    .auth-container {
        margin: var(--space-8) var(--space-4);
        padding: var(--space-8);
    }

    .profile-container {
        margin: var(--space-8) var(--space-4);
    }

    .profile-header,
    .profile-content {
        padding: var(--space-8);
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }

    .user-info-grid {
        grid-template-columns: 1fr;
    }

    .video-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    }
}

@media (max-width: 992px) {
    .admin-sidebar {
        width: 250px;
    }

    .admin-content {
        margin-left: 250px;
    }

    .stats-cards {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ========================================
   Utility Classes
   ======================================== */

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

/* Margin */
.mt-1 { margin-top: var(--space-1); }
.mt-2 { margin-top: var(--space-2); }
.mt-3 { margin-top: var(--space-3); }
.mt-4 { margin-top: var(--space-4); }
.mt-5 { margin-top: var(--space-5); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }
.mt-10 { margin-top: var(--space-10); }
.mt-12 { margin-top: var(--space-12); }

.mb-1 { margin-bottom: var(--space-1); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-3 { margin-bottom: var(--space-3); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-5 { margin-bottom: var(--space-5); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }
.mb-10 { margin-bottom: var(--space-10); }
.mb-12 { margin-bottom: var(--space-12); }

.ml-1 { margin-left: var(--space-1); }
.ml-2 { margin-left: var(--space-2); }
.ml-3 { margin-left: var(--space-3); }
.ml-4 { margin-left: var(--space-4); }
.ml-5 { margin-left: var(--space-5); }
.ml-6 { margin-left: var(--space-6); }

.mr-1 { margin-right: var(--space-1); }
.mr-2 { margin-right: var(--space-2); }
.mr-3 { margin-right: var(--space-3); }
.mr-4 { margin-right: var(--space-4); }
.mr-5 { margin-right: var(--space-5); }
.mr-6 { margin-right: var(--space-6); }

/* Padding */
.p-1 { padding: var(--space-1); }
.p-2 { padding: var(--space-2); }
.p-3 { padding: var(--space-3); }
.p-4 { padding: var(--space-4); }
.p-5 { padding: var(--space-5); }
.p-6 { padding: var(--space-6); }
.p-8 { padding: var(--space-8); }
.p-10 { padding: var(--space-10); }
.p-12 { padding: var(--space-12); }

/* Flexbox */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-1 { gap: var(--space-1); }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-5 { gap: var(--space-5); }
.gap-6 { gap: var(--space-6); }

/* Width */
.w-full { width: 100%; }
.w-1\/2 { width: 50%; }
.w-1\/3 { width: 33.333333%; }
.w-2\/3 { width: 66.666667%; }
.w-1\/4 { width: 25%; }
.w-3\/4 { width: 75%; }

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

/* Border Radius */
.rounded-sm { border-radius: var(--radius-sm); }
.rounded-md { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-xl { border-radius: var(--radius-xl); }
.rounded-2xl { border-radius: var(--radius-2xl); }
.rounded-3xl { border-radius: var(--radius-3xl); }
.rounded-full { border-radius: var(--radius-full); }

/* Shadow */
.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow-md { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }
.shadow-xl { box-shadow: var(--shadow-xl); }
.shadow-2xl { box-shadow: var(--shadow-2xl); }
.shadow-3xl { box-shadow: var(--shadow-3xl); }

/* Display */
.hidden { display: none; }
.block { display: block; }
.inline { display: inline; }
.inline-block { display: inline-block; }
.inline-flex { display: inline-flex; }
.grid { display: grid; }

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

/* Z-Index */
.z-0 { z-index: 0; }
.z-10 { z-index: 10; }
.z-20 { z-index: 20; }
.z-30 { z-index: 30; }
.z-40 { z-index: 40; }
.z-50 { z-index: 50; }
.z-100 { z-index: 100; }

/* Transition */
.transition { transition: all var(--transition-base); }
.transition-fast { transition: all var(--transition-fast); }
.transition-slow { transition: all var(--transition-slow); }

/* Hover Effects */
.hover-scale:hover { transform: scale(1.05); }
.hover-y:hover { transform: translateY(-5px); }
.hover-shadow:hover { box-shadow: var(--shadow-lg); }

/* Print Styles */
@media print {
    .header,
    .footer,
    .nav,
    .admin-sidebar {
        display: none;
    }

    .admin-content {
        margin-left: 0;
        padding: 0;
    }

    body {
        background: white;
        color: black;
    }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
    :root {
        --bg-primary: var(--neutral-900);
        --bg-secondary: var(--neutral-800);
        --bg-tertiary: var(--neutral-700);
        --text-primary: var(--neutral-50);
        --text-secondary: var(--neutral-300);
        --text-tertiary: var(--neutral-400);
        --border-light: var(--neutral-700);
        --border-medium: var(--neutral-600);
    }

    .header {
        background: rgba(15, 23, 42, 0.95);
        border-bottom-color: var(--neutral-800);
    }

    .video-card,
    .admin-card,
    .auth-container,
    .profile-container {
        background: var(--neutral-800);
    }

    .table th {
        background: var(--neutral-700);
    }
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
    :root {
        --primary-600: #0066cc;
        --secondary-600: #800080;
        --text-primary: #000000;
        --text-secondary: #333333;
        --border-light: #666666;
    }
}