/* AI Inside - Visual Guide Styles */

/* CSS Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* Design System Variables */
:root {
    /* Colors */
    --bg-primary: #0F172A;
    --bg-secondary: #1E293B;
    --bg-tertiary: #334155;
    --text-primary: #FFFFFF;
    --text-secondary: #CBD5E1;
    --text-muted: #94A3B8;
    --accent-primary: #22D3EE;
    --accent-secondary: #38BDF8;
    --success: #22C55E;
    --warning: #F59E0B;
    --danger: #EF4444;
    --gradient: linear-gradient(135deg, #22D3EE 0%, #38BDF8 100%);
    --gradient-secondary: linear-gradient(45deg, #6366F1 0%, #8B5CF6 50%, #EC4899 100%);
    --gradient-tertiary: linear-gradient(90deg, #06B6D4 0%, #3B82F6 50%, #8B5CF6 100%);
    
    /* Typography */
    --font-primary: 'Inter', sans-serif;
    --font-secondary: 'Poppins', sans-serif;
    
    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-2xl: 4rem;
    
    /* Transitions */
    --transition-fast: 200ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: 600ms cubic-bezier(0.68, -0.55, 0.265, 1.55);
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --shadow-glow: 0 0 20px rgba(34, 211, 238, 0.3);
    --shadow-glow-primary: 0 0 30px rgba(34, 211, 238, 0.4);
    --shadow-glow-secondary: 0 0 40px rgba(56, 189, 248, 0.3);
}

/* Base Typography */
body {
    font-family: var(--font-primary);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-secondary);
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: var(--space-sm);
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.5rem, 4vw, 2.5rem); }
h3 { font-size: clamp(1.25rem, 3vw, 1.75rem); }
h4 { font-size: clamp(1.1rem, 2.5vw, 1.5rem); }

p {
    margin-bottom: var(--space-sm);
    color: var(--text-secondary);
}

/* Utility Classes */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

.gradient-text {
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-sm) var(--space-md);
    border: none;
    border-radius: 0.5rem;
    font-family: var(--font-primary);
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-normal);
    background: var(--gradient);
    color: var(--text-primary);
}

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

/* Navigation */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--bg-tertiary);
    z-index: 1000;
    transition: all var(--transition-normal);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-sm) var(--space-md);
    max-width: 1200px;
    margin: 0 auto;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-family: var(--font-secondary);
    font-weight: 600;
    font-size: 1.25rem;
}

.logo {
    font-size: 1.5rem;
}

.nav-links {
    display: flex;
    gap: var(--space-lg);
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: all var(--transition-fast);
    position: relative;
}

.nav-links a:hover {
    color: var(--accent-primary);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient);
    transition: width var(--transition-normal);
}

.nav-links a:hover::after {
    width: 100%;
}

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

.theme-toggle,
.search-toggle,
.progress-toggle {
    background: var(--bg-tertiary);
    border: 1px solid var(--bg-tertiary);
    border-radius: 0.5rem;
    padding: var(--space-xs);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: 1.1rem;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.theme-toggle:hover,
.search-toggle:hover,
.progress-toggle:hover {
    background: var(--accent-primary);
    color: var(--bg-primary);
    transform: scale(1.1);
}

/* Search Modal */
.search-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(10px);
    z-index: 2000;
    display: none;
    align-items: center;
    justify-content: center;
}

.search-modal.active {
    display: flex;
}

.search-container {
    background: var(--bg-secondary);
    border-radius: 1rem;
    padding: var(--space-lg);
    width: 90%;
    max-width: 600px;
    position: relative;
    box-shadow: var(--shadow-xl);
}

.search-input {
    width: 100%;
    padding: var(--space-md);
    border: 2px solid var(--bg-tertiary);
    border-radius: 0.5rem;
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 1.1rem;
    margin-bottom: var(--space-md);
}

.search-input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(34, 211, 238, 0.1);
}

.search-close {
    position: absolute;
    top: var(--space-sm);
    right: var(--space-sm);
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-muted);
    cursor: pointer;
    padding: var(--space-xs);
    border-radius: 50%;
    transition: all var(--transition-fast);
}

.search-close:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.search-results {
    max-height: 400px;
    overflow-y: auto;
}

.search-result-item {
    padding: var(--space-sm);
    border-radius: 0.5rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    margin-bottom: var(--space-xs);
}

.search-result-item:hover {
    background: var(--bg-tertiary);
}

.search-result-title {
    font-weight: 600;
    color: var(--accent-primary);
    margin-bottom: var(--space-xs);
}

.search-result-description {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* Reading Progress */
.reading-progress {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--bg-tertiary);
    z-index: 1500;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.reading-progress.visible {
    opacity: 1;
}

.progress-bar {
    height: 100%;
    background: var(--gradient);
    transition: width var(--transition-fast);
    width: 0%;
}

.progress-text {
    position: absolute;
    top: 8px;
    right: var(--space-md);
    font-size: 0.8rem;
    color: var(--text-muted);
    background: var(--bg-primary);
    padding: 2px 8px;
    border-radius: 12px;
}

/* ====== ENHANCED BUTTON ANIMATIONS ====== */
.hero-actions {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    margin-bottom: var(--space-xl);
    flex-wrap: wrap;
    animation: slideInUp 1s ease-out 0.6s both;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-sm) var(--space-md);
    border: none;
    border-radius: 0.75rem;
    font-family: var(--font-primary);
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-normal);
    font-size: 1rem;
    position: relative;
    overflow: hidden;
    transform-style: preserve-3d;
}

.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 ease;
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: var(--gradient);
    color: var(--text-primary);
    box-shadow: var(--shadow-lg);
    animation: morphGradient 10s ease-in-out infinite;
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 2px solid var(--bg-tertiary);
    backdrop-filter: blur(10px);
}

.btn {
    animation: bounceIn 0.8s var(--transition-bounce);
}

.btn:hover {
    transform: translateY(-4px) scale(1.05);
    box-shadow: var(--shadow-xl), var(--shadow-glow-primary);
}

.btn:active {
    transform: translateY(-2px) scale(1.02);
    transition: all 0.1s ease;
}

.btn-secondary:hover {
    border-color: var(--accent-primary);
    background: rgba(56, 189, 248, 0.15);
    box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
    background: var(--gradient-secondary);
    box-shadow: var(--shadow-xl), var(--shadow-glow-secondary);
}

/* Ripple Effect for Buttons */
.btn {
    position: relative;
    overflow: hidden;
}

.btn .ripple {
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: scale(0);
    animation: buttonRipple 0.6s linear;
    pointer-events: none;
}

/* Button Icon Animations */
.btn .icon {
    transition: transform var(--transition-normal);
}

.btn:hover .icon {
    transform: scale(1.2) rotate(10deg);
}

/* ====== ADVANCED FLOATING PARTICLE SYSTEM ====== */
.floating-particles {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
    overflow: hidden;
    z-index: 1;
}

.particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: var(--accent-primary);
    border-radius: 50%;
    opacity: 0.6;
    animation: particleFloat 15s linear infinite;
    box-shadow: 0 0 10px rgba(34, 211, 238, 0.5);
}

.particle:nth-child(2n) {
    width: 3px;
    height: 3px;
    background: var(--accent-secondary);
    animation-delay: -2s;
    animation-duration: 12s;
}

.particle:nth-child(3n) {
    width: 5px;
    height: 5px;
    background: #8B5CF6;
    animation-delay: -4s;
    animation-duration: 18s;
}

.particle:nth-child(4n) {
    width: 2px;
    height: 2px;
    background: #EC4899;
    animation-delay: -1s;
    animation-duration: 20s;
}

/* Neural Network Particles */
.neural-particle {
    position: absolute;
    width: 6px;
    height: 6px;
    background: var(--accent-primary);
    border-radius: 50%;
    opacity: 0.4;
    animation: neuralPulse 3s ease-in-out infinite;
    box-shadow: 0 0 15px rgba(34, 211, 238, 0.8);
}

.neural-particle::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    border: 1px solid rgba(34, 211, 238, 0.3);
    border-radius: 50%;
    animation: neuralPulse 3s ease-in-out infinite reverse;
}

/* Data Flow Particles */
.data-particle {
    position: absolute;
    width: 3px;
    height: 3px;
    background: var(--accent-secondary);
    border-radius: 50%;
    opacity: 0.8;
    animation: dataFlow 4s linear infinite;
}

.data-particle::after {
    content: '';
    position: absolute;
    top: -1px;
    left: -1px;
    right: -1px;
    bottom: -1px;
    border: 1px solid rgba(56, 189, 248, 0.5);
    border-radius: 50%;
    animation: dataFlow 4s linear infinite reverse;
}

/* Attention Line Particles */
.attention-particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: #8B5CF6;
    border-radius: 50%;
    opacity: 0.6;
    animation: attentionLine 2s ease-in-out infinite;
    box-shadow: 0 0 8px rgba(139, 92, 246, 0.6);
}

/* Learning Modal */
.learning-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(10px);
    z-index: 2000;
    display: none;
    align-items: center;
    justify-content: center;
}

.learning-modal.active {
    display: flex;
}

.modal-content {
    background: var(--bg-secondary);
    border-radius: 1rem;
    width: 90%;
    max-width: 500px;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: var(--shadow-xl);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-lg);
    border-bottom: 1px solid var(--bg-tertiary);
}

.modal-header h3 {
    margin: 0;
    color: var(--accent-primary);
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-muted);
    cursor: pointer;
    padding: var(--space-xs);
    border-radius: 50%;
    transition: all var(--transition-fast);
}

.modal-close:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.modal-body {
    padding: var(--space-lg);
}

.progress-overview {
    display: flex;
    gap: var(--space-lg);
    align-items: center;
    margin-bottom: var(--space-lg);
}

.progress-circle {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: conic-gradient(var(--accent-primary) 0deg, var(--accent-primary) 0deg, var(--bg-tertiary) 0deg);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.progress-circle::before {
    content: '';
    position: absolute;
    inset: 8px;
    background: var(--bg-secondary);
    border-radius: 50%;
}

#progress-percentage {
    position: relative;
    z-index: 1;
    font-weight: bold;
    color: var(--accent-primary);
}

.progress-stats {
    flex: 1;
}

.progress-stats p {
    margin: var(--space-xs) 0;
    color: var(--text-secondary);
}

.progress-stats span {
    color: var(--accent-primary);
    font-weight: 600;
}

.section-checklist {
    display: grid;
    gap: var(--space-sm);
}

.checklist-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm);
    background: var(--bg-tertiary);
    border-radius: 0.5rem;
    transition: all var(--transition-fast);
}

.checklist-item:hover {
    background: var(--bg-primary);
}

.checklist-item input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--accent-primary);
}

.checklist-item label {
    color: var(--text-primary);
    cursor: pointer;
    font-weight: 500;
}

.checklist-item.completed {
    background: rgba(34, 197, 94, 0.1);
    border: 1px solid var(--success);
}

.checklist-item.completed label {
    color: var(--success);
}

/* ====== ENHANCED HERO SECTION WITH ADVANCED ANIMATIONS ====== */
.hero {
    padding: calc(80px + var(--space-2xl)) var(--space-md) var(--space-2xl);
    text-align: center;
    background: 
        radial-gradient(circle at 20% 50%, rgba(34, 211, 238, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(56, 189, 248, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 40% 80%, rgba(34, 197, 94, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 60% 30%, rgba(139, 92, 246, 0.1) 0%, transparent 50%),
        linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    background-size: 800px 800px, 600px 600px, 400px 400px, 500px 500px, 100% 100%;
    animation: backgroundShift 20s ease-in-out infinite;
    position: relative;
    overflow: hidden;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

@keyframes backgroundShift {
    0%, 100% { 
        background-position: 0% 0%, 100% 0%, 50% 100%, 0% 0%;
    }
    25% { 
        background-position: 100% 0%, 0% 0%, 100% 100%, 0% 0%;
    }
    50% { 
        background-position: 100% 100%, 0% 100%, 0% 0%, 0% 0%;
    }
    75% { 
        background-position: 0% 100%, 100% 100%, 50% 0%, 0% 0%;
    }
}

/* Enhanced Animated Grid Background */
.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        repeating-linear-gradient(
            45deg,
            transparent,
            transparent 2px,
            rgba(34, 211, 238, 0.03) 2px,
            rgba(34, 211, 238, 0.03) 4px
        ),
        repeating-linear-gradient(
            -45deg,
            transparent,
            transparent 3px,
            rgba(56, 189, 248, 0.02) 3px,
            rgba(56, 189, 248, 0.02) 6px
        );
    animation: gridMove 15s linear infinite, gridMove 20s linear infinite reverse;
    pointer-events: none;
}

/* Animated Neural Network Pattern */
.hero::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 25% 25%, rgba(34, 211, 238, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 75% 75%, rgba(56, 189, 248, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 50% 50%, rgba(139, 92, 246, 0.05) 0%, transparent 40%);
    animation: backgroundShift 25s ease-in-out infinite reverse;
    pointer-events: none;
    opacity: 0.6;
}

@keyframes gridMove {
    0% { transform: translateX(0) translateY(0); }
    100% { transform: translateX(40px) translateY(40px); }
}

/* ====== ENHANCED HERO CONTENT ANIMATIONS ====== */
.hero-title {
    margin-bottom: var(--space-md);
    animation: slideInDown 1s ease-out 0.2s both;
}

.hero-title .gradient-text {
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: morphGradient 8s ease-in-out infinite, glowPulse 3s ease-in-out infinite;
    background-size: 300% 300%;
    font-weight: 700;
    text-shadow: 0 0 30px rgba(34, 211, 238, 0.5);
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    animation: slideInUp 1s ease-out 0.4s both;
    position: relative;
}

.hero-subtitle::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--gradient);
    animation: expandWidth 1.5s ease-out 1s forwards;
}

@keyframes expandWidth {
    to { width: 100%; }
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--space-lg);
    max-width: 600px;
    margin: 0 auto;
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent-primary);
    margin-bottom: var(--space-xs);
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Sections */
.section {
    padding: var(--space-2xl) 0;
    border-bottom: 1px solid var(--bg-tertiary);
}

.section:last-child {
    border-bottom: none;
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-2xl);
}

.section-title {
    margin-bottom: var(--space-sm);
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto;
}

/* ====== ENHANCED OVERVIEW CARDS WITH ADVANCED ANIMATIONS ====== */
.ai-overview-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
}

.overview-card {
    background: var(--bg-secondary);
    padding: var(--space-lg);
    border-radius: 1rem;
    text-align: center;
    border: 1px solid var(--bg-tertiary);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
    transform: translateY(0);
    animation: slideInScale 0.8s ease-out;
    animation-fill-mode: both;
    animation-delay: calc(var(--card-index, 0) * 0.2s);
    backdrop-filter: blur(10px);
}

.overview-card:nth-child(1) { --card-index: 0; }
.overview-card:nth-child(2) { --card-index: 1; }

.overview-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(34, 211, 238, 0.15), transparent);
    transition: left 0.8s ease;
}

.overview-card:nth-child(2)::before {
    background: linear-gradient(90deg, transparent, rgba(56, 189, 248, 0.15), transparent);
}

.overview-card:hover::before {
    left: 100%;
}

.overview-card:hover {
    transform: translateY(-12px) scale(1.05);
    box-shadow: 
        var(--shadow-xl),
        var(--shadow-glow-primary);
    border-color: var(--accent-primary);
    background: linear-gradient(135deg, var(--bg-secondary) 0%, rgba(34, 211, 238, 0.08) 100%);
    animation: cardHover 0.6s ease-out forwards;
}

.overview-card:nth-child(2):hover {
    background: linear-gradient(135deg, var(--bg-secondary) 0%, rgba(56, 189, 248, 0.08) 100%);
    box-shadow: 
        var(--shadow-xl),
        var(--shadow-glow-secondary);
}

/* Card Icon Enhancements */
.card-icon {
    font-size: 3rem;
    margin-bottom: var(--space-md);
    transition: all var(--transition-normal);
    display: inline-block;
    animation: neuralPulse 3s ease-in-out infinite;
    position: relative;
}

.overview-card:hover .card-icon {
    transform: scale(1.3) rotateY(360deg);
    animation: iconPulse 1s ease-in-out, neuralPulse 1s ease-in-out infinite;
    filter: drop-shadow(0 0 15px rgba(34, 211, 238, 0.6));
}

.overview-card:nth-child(2):hover .card-icon {
    filter: drop-shadow(0 0 15px rgba(56, 189, 248, 0.6));
}

/* Card Content Animations */
.overview-card h3 {
    animation: slideInUp 0.8s ease-out 0.4s both;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    transition: all var(--transition-normal);
}

.overview-card:hover h3 {
    background: var(--gradient-secondary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    transform: scale(1.05);
}

.overview-card p {
    animation: slideInUp 0.8s ease-out 0.6s both;
    transition: all var(--transition-normal);
}

.overview-card:hover p {
    color: var(--text-primary);
    transform: translateY(-2px);
}

/* Card Glow Effect */
.overview-card::after {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: var(--gradient);
    border-radius: 1rem;
    z-index: -1;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.overview-card:hover::after {
    opacity: 0.1;
}

/* Card Border Animation */
.overview-card {
    border: 2px solid transparent;
    background: 
        linear-gradient(var(--bg-secondary), var(--bg-secondary)) padding-box,
        var(--gradient) border-box;
}

.overview-card:nth-child(2) {
    background: 
        linear-gradient(var(--bg-secondary), var(--bg-secondary)) padding-box,
        var(--gradient-secondary) border-box;
}

.overview-card:hover {
    border-color: transparent;
    background: 
        linear-gradient(var(--bg-secondary), var(--bg-secondary)) padding-box,
        var(--gradient-secondary) border-box;
}

/* Loading States */
.overview-card.loading {
    opacity: 0.7;
    transform: scale(0.95);
    animation: loadingPulse 2s ease-in-out infinite;
}

@keyframes loadingPulse {
    0%, 100% { opacity: 0.7; }
    50% { opacity: 1; }
}

/* Animated Background for Sections */
.section {
    padding: var(--space-2xl) 0;
    border-bottom: 1px solid var(--bg-tertiary);
    position: relative;
}

.section:nth-child(odd) {
    background: 
        radial-gradient(circle at 30% 20%, rgba(34, 211, 238, 0.03) 0%, transparent 50%),
        linear-gradient(135deg, transparent 0%, rgba(56, 189, 248, 0.02) 100%);
    animation: sectionGlow 25s ease-in-out infinite;
}

.section:nth-child(even) {
    background: 
        radial-gradient(circle at 70% 80%, rgba(56, 189, 248, 0.03) 0%, transparent 50%),
        linear-gradient(135deg, rgba(34, 197, 94, 0.02) 0%, transparent 100%);
    animation: sectionGlow 25s ease-in-out infinite reverse;
}

@keyframes sectionGlow {
    0%, 100% { background-position: 0% 0%, 0% 0%; }
    50% { background-position: 100% 100%, 100% 100%; }
}

/* Flow Diagrams - Running Animations */
.flow-diagram {
    background: var(--bg-secondary);
    padding: var(--space-xl);
    border-radius: 1rem;
    text-align: center;
    border: 1px solid var(--bg-tertiary);
    position: relative;
    overflow: hidden;
}

.flow-diagram::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        repeating-linear-gradient(
            90deg,
            transparent,
            transparent 50px,
            rgba(34, 211, 238, 0.02) 50px,
            rgba(34, 211, 238, 0.02) 51px
        );
    animation: flowLines 8s linear infinite;
    pointer-events: none;
}

@keyframes flowLines {
    0% { transform: translateX(0); }
    100% { transform: translateX(100px); }
}

.flow-steps {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-md);
    margin: var(--space-lg) 0;
    flex-wrap: wrap;
}

.flow-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
    min-width: 120px;
}

.step-icon {
    font-size: 2rem;
    margin-bottom: var(--space-xs);
}

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

.flow-arrow {
    font-size: 1.5rem;
    color: var(--accent-primary);
    font-weight: bold;
}

.flow-explanation {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-top: var(--space-md);
}

/* Interactive Flow */
.interactive-flow {
    background: var(--bg-secondary);
    padding: var(--space-xl);
    border-radius: 1rem;
    border: 1px solid var(--bg-tertiary);
}

.flow-visualization {
    margin-bottom: var(--space-xl);
}

.flow-step {
    display: inline-block;
    background: var(--bg-tertiary);
    padding: var(--space-md);
    border-radius: 0.75rem;
    text-align: center;
    margin: var(--space-xs);
    cursor: pointer;
    transition: all var(--transition-normal);
    min-width: 140px;
}

.flow-step:hover {
    background: var(--accent-primary);
    color: var(--bg-primary);
    transform: scale(1.05);
}

.flow-step.active {
    background: var(--accent-primary);
    color: var(--bg-primary);
}

.step-details {
    background: var(--bg-primary);
    padding: var(--space-lg);
    border-radius: 0.75rem;
    border: 1px solid var(--bg-tertiary);
}

.detail-content {
    display: none;
}

.detail-content.active {
    display: block;
    animation: fadeIn var(--transition-normal);
}

.tooltip {
    background: var(--bg-tertiary);
    padding: var(--space-sm);
    border-radius: 0.5rem;
    margin-top: var(--space-sm);
    border-left: 4px solid var(--accent-primary);
}

/* Reality Check */
.reality-check {
    margin-top: var(--space-xl);
    padding: var(--space-lg);
    background: var(--bg-secondary);
    border-radius: 1rem;
    border: 1px solid var(--bg-tertiary);
}

.reality-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-sm);
    margin-top: var(--space-md);
}

.reality-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm);
    border-radius: 0.5rem;
}

.reality-item.true {
    background: rgba(34, 197, 94, 0.1);
    border: 1px solid var(--success);
}

.reality-item.false {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid var(--danger);
}

.reality-icon {
    font-size: 1.25rem;
}

/* Architecture Diagram */
.architecture-diagram {
    background: var(--bg-secondary);
    padding: var(--space-xl);
    border-radius: 1rem;
    border: 1px solid var(--bg-tertiary);
    margin-bottom: var(--space-xl);
}

.arch-layer {
    background: var(--bg-tertiary);
    margin: var(--space-sm) 0;
    padding: var(--space-md);
    border-radius: 0.5rem;
    border-left: 4px solid var(--accent-primary);
}

.arch-layer.transformer {
    border-left-color: var(--warning);
}

.layer-label {
    font-weight: 600;
    color: var(--accent-primary);
    margin-bottom: var(--space-xs);
}

.transformer-components {
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
    margin-top: var(--space-sm);
}

.component {
    background: var(--bg-primary);
    padding: var(--space-xs) var(--space-sm);
    border-radius: 0.25rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* Attention Explanation */
.attention-explanation {
    background: var(--bg-secondary);
    padding: var(--space-lg);
    border-radius: 1rem;
    border: 1px solid var(--bg-tertiary);
}

.attention-visual {
    margin: var(--space-lg) 0;
}

.word-sequence {
    display: flex;
    gap: var(--space-sm);
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: var(--space-md);
}

.word {
    background: var(--bg-tertiary);
    padding: var(--space-xs) var(--space-sm);
    border-radius: 0.5rem;
    font-weight: 500;
}

/* Diffusion Process */
.diffusion-process {
    background: var(--bg-secondary);
    padding: var(--space-xl);
    border-radius: 1rem;
    border: 1px solid var(--bg-tertiary);
    margin-bottom: var(--space-xl);
}

.process-steps {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-md);
    flex-wrap: wrap;
    margin-bottom: var(--space-lg);
}

.diffusion-step {
    background: var(--bg-tertiary);
    padding: var(--space-md);
    border-radius: 0.75rem;
    text-align: center;
    min-width: 120px;
    transition: all var(--transition-normal);
}

.diffusion-step:hover {
    background: var(--accent-primary);
    color: var(--bg-primary);
    transform: scale(1.05);
}

.process-arrow {
    font-size: 1.5rem;
    color: var(--accent-primary);
    font-weight: bold;
}

/* Noise Demo */
.noise-demo {
    background: var(--bg-secondary);
    padding: var(--space-lg);
    border-radius: 1rem;
    border: 1px solid var(--bg-tertiary);
    text-align: center;
}

.slider-container {
    margin: var(--space-lg) 0;
}

.noise-slider {
    width: 100%;
    max-width: 400px;
    margin-bottom: var(--space-sm);
}

.image-preview {
    display: flex;
    justify-content: center;
    margin-top: var(--space-md);
}

#noise-canvas {
    border: 1px solid var(--bg-tertiary);
    border-radius: 0.5rem;
    background: var(--bg-primary);
}

/* Hand Problems */
.why-hands-broken {
    margin-top: var(--space-xl);
    padding: var(--space-lg);
    background: var(--bg-secondary);
    border-radius: 1rem;
    border: 1px solid var(--bg-tertiary);
}

.hand-problems {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-md);
    margin-top: var(--space-md);
}

.problem {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm);
    background: var(--bg-tertiary);
    border-radius: 0.5rem;
}

.problem-icon {
    font-size: 1.5rem;
}

/* Video Generation */
.video-generation-flow {
    background: var(--bg-secondary);
    padding: var(--space-xl);
    border-radius: 1rem;
    border: 1px solid var(--bg-tertiary);
    margin-bottom: var(--space-xl);
}

.video-steps {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-md);
    flex-wrap: wrap;
}

.video-step {
    background: var(--bg-tertiary);
    padding: var(--space-md);
    border-radius: 0.75rem;
    text-align: center;
    min-width: 140px;
    transition: all var(--transition-normal);
}

.video-step:hover {
    background: var(--accent-primary);
    color: var(--bg-primary);
    transform: scale(1.05);
}

/* Temporal Consistency */
.temporal-consistency {
    background: var(--bg-secondary);
    padding: var(--space-lg);
    border-radius: 1rem;
    border: 1px solid var(--bg-tertiary);
}

.consistency-demo {
    text-align: center;
    margin-top: var(--space-md);
}

.frame-sequence {
    display: flex;
    justify-content: center;
    gap: var(--space-md);
    margin-bottom: var(--space-md);
    flex-wrap: wrap;
}

.frame {
    background: var(--bg-tertiary);
    padding: var(--space-md);
    border-radius: 0.5rem;
    text-align: center;
    min-width: 100px;
}

.frame-number {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: var(--space-xs);
}

.frame-content {
    font-size: 2rem;
}

/* Deepfakes Section */
.disclaimer {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    background: rgba(245, 158, 11, 0.1);
    border: 1px solid var(--warning);
    padding: var(--space-md);
    border-radius: 0.75rem;
    margin-bottom: var(--space-xl);
}

.disclaimer-icon {
    font-size: 2rem;
}

.deepfake-types {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--space-xl);
    margin-bottom: var(--space-xl);
}

.deepfake-type {
    background: var(--bg-secondary);
    padding: var(--space-lg);
    border-radius: 1rem;
    border: 1px solid var(--bg-tertiary);
}

.deepfake-flow {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-md);
    margin: var(--space-lg) 0;
    flex-wrap: wrap;
}

.deepfake-note {
    background: var(--bg-tertiary);
    padding: var(--space-sm);
    border-radius: 0.5rem;
    border-left: 4px solid var(--danger);
    margin-top: var(--space-md);
}

/* Protection Tips */
.protection-tips {
    background: var(--bg-secondary);
    padding: var(--space-lg);
    border-radius: 1rem;
    border: 1px solid var(--bg-tertiary);
}

.tips-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-md);
    margin-top: var(--space-md);
}

.tip {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm);
    background: var(--bg-tertiary);
    border-radius: 0.5rem;
}

.tip-icon {
    font-size: 1.25rem;
}

/* AI Agents Section */
.agent-intro {
    margin-bottom: var(--space-xl);
}

.agent-comparison {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: var(--space-lg);
    align-items: center;
    background: var(--bg-secondary);
    padding: var(--space-xl);
    border-radius: 1rem;
    border: 1px solid var(--bg-tertiary);
}

.comparison-item {
    text-align: center;
    padding: var(--space-md);
}

.vs {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--accent-primary);
}

.agent-icon {
    font-size: 3rem;
    margin-top: var(--space-md);
}

/* Agent Loop */
.agent-loop {
    background: var(--bg-secondary);
    padding: var(--space-xl);
    border-radius: 1rem;
    border: 1px solid var(--bg-tertiary);
    margin-bottom: var(--space-xl);
}

.loop-visualization {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-md);
    margin: var(--space-lg) 0;
    flex-wrap: wrap;
}

.loop-step {
    background: var(--bg-tertiary);
    padding: var(--space-md);
    border-radius: 0.75rem;
    text-align: center;
    min-width: 120px;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.loop-step:hover {
    background: var(--accent-primary);
    color: var(--bg-primary);
    transform: scale(1.05);
}

.loop-arrow {
    font-size: 1.5rem;
    color: var(--accent-primary);
    font-weight: bold;
}

/* Agent Examples */
.agent-examples {
    background: var(--bg-secondary);
    padding: var(--space-lg);
    border-radius: 1rem;
    border: 1px solid var(--bg-tertiary);
}

.examples-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-md);
    margin-top: var(--space-md);
}

.example {
    background: var(--bg-tertiary);
    padding: var(--space-md);
    border-radius: 0.75rem;
    text-align: center;
    transition: all var(--transition-normal);
}

.example:hover {
    background: var(--accent-primary);
    color: var(--bg-primary);
    transform: translateY(-2px);
}

.example-icon {
    font-size: 2rem;
    margin-bottom: var(--space-sm);
}

/* Integration Types */
.integration-types {
    display: grid;
    gap: var(--space-xl);
}

.integration-type {
    background: var(--bg-secondary);
    padding: var(--space-xl);
    border-radius: 1rem;
    border: 1px solid var(--bg-tertiary);
}

.api-diagram {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-md);
    margin: var(--space-lg) 0;
    flex-wrap: wrap;
}

.api-component {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
    background: var(--bg-tertiary);
    padding: var(--space-md);
    border-radius: 0.75rem;
    min-width: 100px;
}

.component-icon {
    font-size: 2rem;
}

.connection {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-xs);
}

.connection-line {
    width: 60px;
    height: 2px;
    background: var(--accent-primary);
    position: relative;
}

.connection-line::after {
    content: '→';
    position: absolute;
    right: -10px;
    top: -10px;
    color: var(--accent-primary);
    font-weight: bold;
}

.connection-label {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* Plugin Diagram */
.plugin-diagram {
    display: flex;
    gap: var(--space-lg);
    margin: var(--space-lg) 0;
    justify-content: center;
    flex-wrap: wrap;
}

.main-app {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
    background: var(--bg-tertiary);
    padding: var(--space-md);
    border-radius: 0.75rem;
    min-width: 120px;
}

.app-icon {
    font-size: 2rem;
}

.plugin-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.plugin {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    background: var(--bg-primary);
    padding: var(--space-sm);
    border-radius: 0.5rem;
    min-width: 140px;
}

.plugin-icon {
    font-size: 1.5rem;
}

/* Tool Calling */
.tool-calling-flow {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-md);
    margin: var(--space-lg) 0;
    flex-wrap: wrap;
}

/* Capabilities Grid */
.capabilities-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--space-xl);
    margin-bottom: var(--space-xl);
}

.capability-column {
    background: var(--bg-secondary);
    padding: var(--space-xl);
    border-radius: 1rem;
    border: 1px solid var(--bg-tertiary);
}

.can-do h3 {
    color: var(--success);
}

.cannot-do h3 {
    color: var(--danger);
}

.capabilities-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    margin-top: var(--space-md);
}

.capability-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm);
    background: var(--bg-tertiary);
    border-radius: 0.5rem;
    transition: all var(--transition-normal);
}

.capability-item:hover {
    background: var(--bg-primary);
    transform: translateX(5px);
}

.capability-icon {
    font-size: 1.25rem;
}

/* Harsh Reality */
.harsh-reality {
    background: var(--bg-secondary);
    padding: var(--space-lg);
    border-radius: 1rem;
    border: 1px solid var(--bg-tertiary);
    text-align: center;
}

.reality-statement {
    background: var(--bg-tertiary);
    padding: var(--space-md);
    border-radius: 0.5rem;
    border-left: 4px solid var(--warning);
    margin-top: var(--space-md);
}

/* Future Timeline */
.future-timeline {
    display: grid;
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
}

.timeline-item {
    display: grid;
    grid-template-columns: 120px 1fr;
    gap: var(--space-lg);
    align-items: center;
    background: var(--bg-secondary);
    padding: var(--space-lg);
    border-radius: 1rem;
    border: 1px solid var(--bg-tertiary);
    transition: all var(--transition-normal);
}

.timeline-item:hover {
    border-color: var(--accent-primary);
    transform: translateX(10px);
}

.timeline-year {
    font-size: 1.25rem;
    font-weight: bold;
    color: var(--accent-primary);
    text-align: center;
}

.timeline-content h4 {
    color: var(--text-primary);
    margin-bottom: var(--space-xs);
}

/* Skills Future */
.skills-future {
    background: var(--bg-secondary);
    padding: var(--space-lg);
    border-radius: 1rem;
    border: 1px solid var(--bg-tertiary);
    margin-bottom: var(--space-xl);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-lg);
    margin-top: var(--space-md);
}

.skill-category {
    background: var(--bg-tertiary);
    padding: var(--space-md);
    border-radius: 0.75rem;
}

.skill-category h5 {
    color: var(--accent-primary);
    margin-bottom: var(--space-sm);
}

.skill-category ul {
    list-style: none;
}

.skill-category li {
    padding: var(--space-xs) 0;
    color: var(--text-secondary);
    position: relative;
    padding-left: var(--space-md);
}

.skill-category li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--accent-primary);
}

/* Student Advice */
.student-advice {
    background: var(--bg-secondary);
    padding: var(--space-lg);
    border-radius: 1rem;
    border: 1px solid var(--bg-tertiary);
}

.advice-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-md);
    margin-top: var(--space-md);
}

.advice-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm);
    background: var(--bg-tertiary);
    border-radius: 0.5rem;
}

.advice-icon {
    font-size: 1.25rem;
}

/* Footer */
.footer {
    background: var(--bg-secondary);
    padding: var(--space-2xl) 0;
    border-top: 1px solid var(--bg-tertiary);
    margin-top: var(--space-2xl);
}

.footer-content {
    text-align: center;
    display: grid;
    gap: var(--space-lg);
}

.footer-brand {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    font-family: var(--font-secondary);
    font-weight: 600;
    font-size: 1.25rem;
}

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

.footer-disclaimer {
    background: var(--bg-tertiary);
    padding: var(--space-md);
    border-radius: 0.5rem;
    border-left: 4px solid var(--accent-primary);
}

/* ====== ADVANCED ANIMATION SYSTEM ====== */

/* Core Animation Keyframes */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes slideInLeft {
    from { opacity: 0; transform: translateX(-50px); }
    to { opacity: 1; transform: translateX(0); }
}

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

/* Advanced Background Animations */
@keyframes backgroundShift {
    0%, 100% { 
        background-position: 0% 0%, 100% 0%, 50% 100%, 0% 0%;
    }
    25% { 
        background-position: 100% 0%, 0% 0%, 100% 100%, 0% 0%;
    }
    50% { 
        background-position: 100% 100%, 0% 100%, 0% 0%, 0% 0%;
    }
    75% { 
        background-position: 0% 100%, 100% 100%, 50% 0%, 0% 0%;
    }
}

@keyframes gridMove {
    0% { transform: translateX(0) translateY(0); }
    100% { transform: translateX(40px) translateY(40px); }
}

@keyframes flowLines {
    0% { transform: translateX(0); }
    100% { transform: translateX(100px); }
}

/* Particle System Animations */
@keyframes float {
    0%, 100% { 
        transform: translateY(0px) translateX(0px) rotate(0deg) scale(1); 
        opacity: 0.6; 
    }
    25% { 
        transform: translateY(-20px) translateX(10px) rotate(90deg) scale(1.1); 
        opacity: 1; 
    }
    50% { 
        transform: translateY(-40px) translateX(-5px) rotate(180deg) scale(0.9); 
        opacity: 0.8; 
    }
    75% { 
        transform: translateY(-20px) translateX(-10px) rotate(270deg) scale(1.05); 
        opacity: 1; 
    }
}

@keyframes particleFloat {
    0% { 
        transform: translateY(100vh) translateX(0) rotate(0deg) scale(0);
        opacity: 0;
    }
    10% {
        opacity: 1;
        scale: 1;
    }
    90% {
        opacity: 1;
        scale: 1;
    }
    100% { 
        transform: translateY(-100px) translateX(50px) rotate(360deg) scale(0);
        opacity: 0;
    }
}

@keyframes neuralPulse {
    0%, 100% { 
        box-shadow: 0 0 5px rgba(34, 211, 238, 0.3);
        transform: scale(1);
    }
    50% { 
        box-shadow: 0 0 20px rgba(34, 211, 238, 0.8);
        transform: scale(1.05);
    }
}

@keyframes dataFlow {
    0% { 
        transform: translateX(-100%);
        opacity: 0;
    }
    10% {
        opacity: 1;
    }
    90% {
        opacity: 1;
    }
    100% { 
        transform: translateX(100%);
        opacity: 0;
    }
}

@keyframes attentionLine {
    0% { 
        stroke-dasharray: 0 100;
        opacity: 0;
    }
    50% {
        opacity: 1;
    }
    100% { 
        stroke-dasharray: 100 0;
        opacity: 0;
    }
}

/* Interactive Element Animations */
@keyframes iconPulse {
    0%, 100% { transform: scale(1) rotateY(0deg); }
    25% { transform: scale(1.1) rotateY(90deg); }
    50% { transform: scale(1.2) rotateY(180deg); }
    75% { transform: scale(1.1) rotateY(270deg); }
}

@keyframes buttonRipple {
    0% {
        transform: scale(0);
        opacity: 1;
    }
    100% {
        transform: scale(4);
        opacity: 0;
    }
}

@keyframes cardHover {
    0% { 
        transform: translateY(0) scale(1);
        box-shadow: var(--shadow-lg);
    }
    100% { 
        transform: translateY(-8px) scale(1.02);
        box-shadow: var(--shadow-xl), var(--shadow-glow-primary);
    }
}

@keyframes typeWriter {
    from { width: 0; }
    to { width: 100%; }
}

@keyframes blink {
    0%, 50% { border-color: transparent; }
    51%, 100% { border-color: var(--accent-primary); }
}

@keyframes morphGradient {
    0%, 100% { 
        background: var(--gradient);
        filter: hue-rotate(0deg);
    }
    33% { 
        background: var(--gradient-secondary);
        filter: hue-rotate(120deg);
    }
    66% { 
        background: var(--gradient-tertiary);
        filter: hue-rotate(240deg);
    }
}

@keyframes glowPulse {
    0%, 100% { 
        text-shadow: 0 0 5px var(--accent-primary);
        filter: brightness(1);
    }
    50% { 
        text-shadow: 0 0 20px var(--accent-primary), 0 0 30px var(--accent-secondary);
        filter: brightness(1.2);
    }
}

@keyframes loadingDots {
    0%, 20% { opacity: 0; }
    50% { opacity: 1; }
    80%, 100% { opacity: 0; }
}

@keyframes progressFill {
    0% { width: 0%; }
    100% { width: var(--progress-width); }
}

@keyframes rotate3D {
    from { transform: rotateY(0deg); }
    to { transform: rotateY(360deg); }
}

@keyframes bounceIn {
    0% {
        transform: scale(0.3) rotate(-10deg);
        opacity: 0;
    }
    50% {
        transform: scale(1.05) rotate(5deg);
    }
    70% {
        transform: scale(0.9) rotate(-2deg);
    }
    100% {
        transform: scale(1) rotate(0deg);
        opacity: 1;
    }
}

/* Scroll-triggered animations */
@keyframes slideInUp {
    from { 
        opacity: 0; 
        transform: translateY(30px); 
    }
    to { 
        opacity: 1; 
        transform: translateY(0); 
    }
}

@keyframes slideInDown {
    from { 
        opacity: 0; 
        transform: translateY(-30px); 
    }
    to { 
        opacity: 1; 
        transform: translateY(0); 
    }
}

@keyframes slideInScale {
    from { 
        opacity: 0; 
        transform: scale(0.8); 
    }
    to { 
        opacity: 1; 
        transform: scale(1); 
    }
}

/* Hover Animation Classes */
.animate-fade-in {
    animation: fadeIn var(--transition-slow);
}

.animate-slide-left {
    animation: slideInLeft var(--transition-slow);
}

.animate-slide-right {
    animation: slideInRight var(--transition-slow);
}

.animate-slide-up {
    animation: slideInUp 0.6s ease-out;
}

.animate-slide-down {
    animation: slideInDown 0.6s ease-out;
}

.animate-scale-in {
    animation: slideInScale 0.5s ease-out;
}

.animate-bounce-in {
    animation: bounceIn 0.8s var(--transition-bounce);
}

.animate-glow {
    animation: glowPulse 2s ease-in-out infinite;
}

.animate-pulse {
    animation: neuralPulse 2s ease-in-out infinite;
}

.animate-float {
    animation: float 6s ease-in-out infinite;
}

.animate-rotate {
    animation: rotate3D 20s linear infinite;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .flow-steps {
        flex-direction: column;
    }
    
    .process-steps {
        flex-direction: column;
    }
    
    .video-steps {
        flex-direction: column;
    }
    
    .agent-comparison {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .vs {
        order: -1;
    }
    
    .capabilities-grid {
        grid-template-columns: 1fr;
    }
    
    .timeline-item {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .api-diagram {
        flex-direction: column;
    }
    
    .connection {
        transform: rotate(90deg);
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--space-sm);
    }
    
    .hero {
        padding: calc(80px + var(--space-lg)) var(--space-sm) var(--space-lg);
    }
    
    .section {
        padding: var(--space-lg) 0;
    }
    
    .nav-container {
        padding: var(--space-sm);
    }
}

/* Scroll Behavior */
html {
    scroll-behavior: smooth;
}

/* Focus States */
*:focus {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
}

/* Selection */
::selection {
    background: var(--accent-primary);
    color: var(--bg-primary);
}

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

/* Hover Effects */
.hover-lift {
    transition: transform var(--transition-normal);
}

.hover-lift:hover {
    transform: translateY(-2px);
}

/* Interactive Elements */
.clickable {
    cursor: pointer;
}

.interactive {
    transition: all var(--transition-normal);
}

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

/* Light Theme */
.light-theme {
    --bg-primary: #FFFFFF;
    --bg-secondary: #F8FAFC;
    --bg-tertiary: #E2E8F0;
    --text-primary: #1E293B;
    --text-secondary: #475569;
    --text-muted: #64748B;
    --accent-primary: #0EA5E9;
    --accent-secondary: #0284C7;
}

.light-theme .nav {
    background: rgba(248, 250, 252, 0.95);
    border-bottom-color: var(--bg-tertiary);
}

.light-theme .hero {
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
}

.light-theme .overview-card,
.light-theme .flow-diagram,
.light-theme .interactive-flow,
.light-theme .architecture-diagram,
.light-theme .diffusion-process,
.light-theme .video-generation-flow,
.light-theme .deepfake-type,
.light-theme .agent-comparison,
.light-theme .agent-loop,
.light-theme .integration-type,
.light-theme .capability-column {
    background: var(--bg-secondary);
    border-color: var(--bg-tertiary);
}

.light-theme .btn-secondary {
    background: var(--bg-primary);
    border-color: var(--bg-tertiary);
    color: var(--text-primary);
}

.light-theme .progress-circle::before {
    background: var(--bg-secondary);
}

/* Quick Overview Feature */
#quick-overview-btn {
    position: relative;
    overflow: hidden;
}

#quick-overview-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;
}

#quick-overview-btn:hover::before {
    left: 100%;
}

/* Advanced Animations */
@keyframes slideInUp {
    from { 
        opacity: 0; 
        transform: translateY(30px); 
    }
    to { 
        opacity: 1; 
        transform: translateY(0); 
    }
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

.animate-slide-up {
    animation: slideInUp 0.6s ease-out;
}

.animate-pulse {
    animation: pulse 2s infinite;
}

/* Interactive Feedback */
.interactive-feedback {
    position: relative;
}

.interactive-feedback::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(34, 211, 238, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.3s, height 0.3s;
}

.interactive-feedback:active::after {
    width: 100px;
    height: 100px;
}

/* Loading States */
.loading-skeleton {
    background: linear-gradient(90deg, var(--bg-tertiary) 25%, var(--bg-primary) 50%, var(--bg-tertiary) 75%);
    background-size: 200% 100%;
    animation: loading 1.5s infinite;
}

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

/* Enhanced Focus States */
*:focus-visible {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
    border-radius: 4px;
}

/* Smooth Transitions for Theme Change */
* {
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

/* Performance Optimizations */
.hero-stats,
.floating-particles {
    will-change: transform;
}

.floating-particles {
    contain: layout style paint;
}

/* Print Styles */
@media print {
    .nav,
    .search-modal,
    .learning-modal,
    .reading-progress,
    .floating-particles {
        display: none !important;
    }
    
    .section {
        break-inside: avoid;
        page-break-inside: avoid;
    }
    
    body {
        background: white !important;
        color: black !important;
    }
    
    .gradient-text {
        background: none !important;
        -webkit-text-fill-color: black !important;
        color: black !important;
    }
}