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

:root {
    /* Color Palette - Agentic Theme */
    --primary: #00D9FF;
    --primary-dark: #00B8D9;
    --primary-light: #4DE4FF;
    --secondary: #7B61FF;
    --secondary-dark: #6349E6;
    --accent: #FF6B9D;
    --success: #00E676;
    
    /* Light Theme Colors (Default) - Clear Section Separation */
    --bg-primary: #FFFFFF;
    --bg-secondary: #F5F7FA;
    --bg-tertiary: #E8ECF1;
    --bg-content-light: #FFFFFF;
    --bg-content-dark: #F5F7FA;
    --bg-card: #FFFFFF;
    --bg-card-hover: #FAFBFC;
    
    /* Text */
    --text-primary: #0F172A;
    --text-secondary: #475569;
    --text-tertiary: #64748B;
    
    /* Borders */
    --border-color: rgba(15, 23, 42, 0.12);
    --border-color-light: rgba(15, 23, 42, 0.06);
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.08);
    --shadow-md: 0 4px 16px rgba(15, 23, 42, 0.12);
    --shadow-lg: 0 8px 32px rgba(15, 23, 42, 0.16);
    --shadow-glow: 0 0 30px rgba(0, 217, 255, 0.3);
    
    /* Gradients for light mode */
    --gradient-orb-opacity: 0.12;
    --grid-opacity: 0.25;
    
    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Courier New', monospace;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* Dark Theme - Clear Section Separation */
[data-theme="dark"] {
    /* Dark Theme Colors - Hero dark, alternating content sections */
    --bg-primary: #0B0F1A;
    --bg-secondary: #161D2F;
    --bg-tertiary: #232D42;
    --bg-content-light: #0B0F1A;
    --bg-content-dark: #161D2F;
    --bg-card: rgba(255, 255, 255, 0.06);
    --bg-card-hover: rgba(255, 255, 255, 0.10);
    
    /* Text */
    --text-primary: #F1F5F9;
    --text-secondary: #CBD5E1;
    --text-tertiary: #94A3B8;
    
    /* Borders */
    --border-color: rgba(148, 163, 184, 0.15);
    --border-color-light: rgba(148, 163, 184, 0.08);
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.6);
    --shadow-glow: 0 0 30px rgba(0, 217, 255, 0.5);
    
    /* Gradients for dark mode */
    --gradient-orb-opacity: 0.35;
    --grid-opacity: 0.4;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-sans);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Smooth transitions for theme switching - only for color properties */
section,
.navbar,
.hero,
.abstract-section,
.dataset-section,
.model-section,
.results-section,
.examples-section,
.team-section,
.paper-section,
.footer,
.card,
.highlight-card,
.stats-card,
.feature-item,
.benchmark-card,
.finding-card,
.app-card,
.author-card,
.resource-card,
.instruction-card,
.model-feature-card,
.nav-link,
.btn,
.theme-toggle {
    transition: background-color 0.3s ease, 
                color 0.3s ease, 
                border-color 0.3s ease,
                box-shadow 0.3s ease;
}

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

/* ============================================
   Typography
   ============================================ */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
}

h1 { font-size: 3.5rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 2rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

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

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

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

/* ============================================
   Navigation
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: all var(--transition-normal);
}

[data-theme="light"] .navbar {
    background: rgba(255, 255, 255, 0.95);
    border-bottom: 1px solid rgba(15, 23, 42, 0.1);
}

[data-theme="dark"] .navbar {
    background: rgba(11, 15, 26, 0.95);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.nav-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 1rem var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    font-weight: 700;
}

.logo-text {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.nav-link {
    color: var(--text-secondary);
    font-weight: 500;
    transition: var(--transition-fast);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: var(--transition-fast);
}

.nav-link:hover {
    color: var(--text-primary);
}

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

.cta-nav {
    padding: 0.5rem 1.5rem;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: var(--radius-sm);
    color: #FFFFFF !important;
}

.cta-nav:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
    color: #FFFFFF !important;
}

.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border: 1px solid var(--border-color);
    background: var(--bg-card);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition-fast);
    position: relative;
    color: var(--text-primary);
}

.theme-toggle:hover {
    background: var(--bg-card-hover);
    border-color: var(--primary);
}

.theme-toggle svg {
    position: absolute;
    transition: var(--transition-normal);
}

.sun-icon {
    opacity: 1;
    transform: rotate(0deg) scale(1);
}

.moon-icon {
    opacity: 0;
    transform: rotate(180deg) scale(0);
}

[data-theme="dark"] .sun-icon {
    opacity: 0;
    transform: rotate(180deg) scale(0);
}

[data-theme="dark"] .moon-icon {
    opacity: 1;
    transform: rotate(0deg) scale(1);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}

.nav-toggle span {
    width: 25px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition-fast);
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding-top: 80px;
    overflow: hidden;
    background: var(--bg-content-light);
}

/* In dark mode, hero uses primary dark background */
[data-theme="dark"] .hero {
    background: var(--bg-content-light);
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

.gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: var(--gradient-orb-opacity);
    animation: float 20s ease-in-out infinite;
    transition: opacity var(--transition-slow);
}

.orb-1 {
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--primary), transparent);
    top: -200px;
    left: -200px;
    animation-delay: 0s;
}

.orb-2 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, var(--secondary), transparent);
    top: 50%;
    right: -150px;
    animation-delay: 5s;
}

.orb-3 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, var(--accent), transparent);
    bottom: -100px;
    left: 50%;
    animation-delay: 10s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(50px, -50px) scale(1.1); }
    66% { transform: translate(-30px, 30px) scale(0.9); }
}

.grid-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(rgba(0, 217, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 217, 255, 0.03) 1px, transparent 1px);
    background-size: 50px 50px;
    opacity: var(--grid-opacity);
    transition: opacity var(--transition-slow);
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    animation: fadeInUp 1s ease-out;
}

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

.hero-title {
    font-size: 4rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: var(--spacing-md);
    animation: fadeInUp 1s ease-out 0.3s both;
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary), var(--secondary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: gradient-shift 3s ease infinite;
    background-size: 200% 200%;
}

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

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 800px;
    margin: 0 auto var(--spacing-lg);
    animation: fadeInUp 1s ease-out 0.4s both;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    animation: fadeInUp 1s ease-out 0.5s both;
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.hero-buttons {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    animation: fadeInUp 1s ease-out 0.6s both;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition-normal);
    border: none;
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: var(--text-primary);
    box-shadow: var(--shadow-md);
}

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

.btn-secondary {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background: var(--bg-card-hover);
    border-color: var(--primary);
    transform: translateY(-3px);
}

.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-tertiary);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    animation: bounce 2s ease infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(10px); }
}

.scroll-mouse {
    width: 24px;
    height: 40px;
    border: 2px solid var(--border-color);
    border-radius: 12px;
    position: relative;
}

.scroll-wheel {
    width: 4px;
    height: 8px;
    background: var(--primary);
    border-radius: 2px;
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    animation: wheel-scroll 2s ease infinite;
}

@keyframes wheel-scroll {
    0% { top: 8px; opacity: 1; }
    100% { top: 24px; opacity: 0; }
}

/* ============================================
   Section Styles
   ============================================ */
section {
    padding: var(--spacing-xl) 0;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.section-tag {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 50px;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: var(--spacing-sm);
}

.section-title {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: var(--spacing-sm);
}

.section-description {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto;
}

/* Content Box Styling - Similar to CTA Box */
.content-box {
    padding: var(--spacing-md) var(--spacing-sm) var(--spacing-sm) var(--spacing-sm);
    background: var(--bg-card);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
    margin-bottom: var(--spacing-md);
}

.content-box::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--secondary), var(--accent));
}

/* ============================================
   Abstract Section
   ============================================ */
.abstract-section {
    background: var(--bg-content-dark);
}

.abstract-content {
    max-width: 900px;
    margin: 0 auto;
    font-size: 1.125rem;
    line-height: 1.8;
}

.abstract-content p {
    margin-bottom: var(--spacing-md);
}

.abstract-content strong {
    color: var(--text-primary);
    font-weight: 600;
}

.teaser-image {
    margin-top: var(--spacing-md);
    text-align: center;
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--border-color-light);
}

.teaser-image img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-sm);
    transition: transform var(--transition-normal);
}

.teaser-image img:hover {
    transform: scale(1.02);
}

.key-insight {
    margin-top: var(--spacing-lg);
    padding: var(--spacing-md);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-left: 4px solid var(--primary);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    display: flex;
    gap: var(--spacing-sm);
    align-items: flex-start;
}

.insight-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.insight-text {
    flex: 1;
}

/* ============================================
   Dataset Section
   ============================================ */
.dataset-section {
    background: var(--bg-content-light);
}

/* Dataset Showcase with Chart and Stats */
.dataset-showcase {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
    align-items: start;
    margin-bottom: 0;
}

.dataset-chart {
    text-align: center;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.rotating-chart {
    display: inline-block;
    max-width: 100%;
    margin-top: var(--spacing-xs);
}

.rotating-chart img {
    max-width: 100%;
    max-height: 380px;
    height: auto;
    border-radius: var(--radius-md);
    object-fit: contain;
}

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

.chart-caption {
    margin-top: 0;
    margin-bottom: 0;
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.dataset-stats-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-sm);
}

.stat-card {
    padding: var(--spacing-sm);
    background: var(--bg-card);
    border-radius: var(--radius-md);
    text-align: center;
    transition: var(--transition-normal);
    border: 2px solid transparent;
}

.stat-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.stat-icon {
    font-size: 1.5rem;
    margin-bottom: 0.25rem;
    line-height: 1;
    font-family: "Apple Color Emoji", "Segoe UI Emoji", "Noto Color Emoji", sans-serif;
}

.stat-number {
    font-size: 1.75rem;
    font-weight: 800;
    line-height: 1;
    margin-bottom: 0.25rem;
}

.stat-label {
    font-size: 0.65rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    color: var(--text-secondary);
    text-transform: uppercase;
    margin-bottom: 0.5rem;
}

.stat-description {
    font-size: 0.8rem;
    color: var(--text-secondary);
    line-height: 1.3;
    margin: 0;
}

/* Stat Card Color Variants */
.stat-card-primary {
    border-color: rgba(0, 217, 255, 0.3);
    background: linear-gradient(135deg, rgba(0, 217, 255, 0.05), rgba(0, 217, 255, 0.02));
}

.stat-card-primary .stat-number {
    color: var(--primary);
}

.stat-card-secondary {
    border-color: rgba(123, 97, 255, 0.3);
    background: linear-gradient(135deg, rgba(123, 97, 255, 0.05), rgba(123, 97, 255, 0.02));
}

.stat-card-secondary .stat-number {
    color: var(--secondary);
}

.stat-card-tertiary {
    border-color: rgba(255, 107, 157, 0.3);
    background: linear-gradient(135deg, rgba(255, 107, 157, 0.05), rgba(255, 107, 157, 0.02));
}

.stat-card-tertiary .stat-number {
    color: var(--accent);
}

.stat-card-accent {
    border-color: rgba(0, 230, 118, 0.3);
    background: linear-gradient(135deg, rgba(0, 230, 118, 0.05), rgba(0, 230, 118, 0.02));
}

.stat-card-accent .stat-number {
    color: var(--success);
}

.stat-card-success {
    border-color: rgba(255, 193, 7, 0.3);
    background: linear-gradient(135deg, rgba(255, 193, 7, 0.05), rgba(255, 193, 7, 0.02));
}

.stat-card-success .stat-number {
    color: #FFC107;
}

.stat-card-warning {
    border-color: rgba(156, 39, 176, 0.3);
    background: linear-gradient(135deg, rgba(156, 39, 176, 0.05), rgba(156, 39, 176, 0.02));
}

.stat-card-warning .stat-number {
    color: #9C27B0;
}

.dataset-highlights {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.highlight-card {
    padding: var(--spacing-md);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
    text-align: center;
}

.highlight-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--primary);
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.highlight-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
}

.highlight-card h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
}

.highlight-card p {
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.dataset-stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.stats-card {
    padding: var(--spacing-md);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    text-align: center;
    transition: var(--transition-normal);
}

.stats-card:hover {
    background: var(--bg-card-hover);
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.stats-visual {
    margin-bottom: var(--spacing-sm);
}

.circular-progress {
    position: relative;
    display: inline-block;
}

.circular-progress svg {
    transform: rotate(-90deg);
}

.progress-bg {
    fill: none;
    stroke: var(--bg-tertiary);
    stroke-width: 8;
}

.progress-bar {
    fill: none;
    stroke: url(#gradient);
    stroke-width: 8;
    stroke-linecap: round;
    stroke-dasharray: 314;
    stroke-dashoffset: 0;
    transition: stroke-dashoffset 1s ease;
}

.progress-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.stats-card h4 {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-xs);
}

.stats-card p {
    font-size: 0.875rem;
    color: var(--text-tertiary);
}

.dataset-features {
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.dataset-features h3 {
    font-size: 2rem;
    text-align: center;
    margin-bottom: var(--spacing-md);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
}

.feature-item {
    display: flex;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
}

.feature-item:hover {
    background: var(--bg-card-hover);
    border-color: var(--primary);
    box-shadow: var(--shadow-md);
    transform: translateX(5px);
}

.feature-check {
    width: 28px;
    height: 28px;
    background: var(--primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-weight: 700;
    color: var(--bg-primary);
}

.feature-content h4 {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-xs);
}

.feature-content p {
    font-size: 0.95rem;
    margin: 0;
}

.instruction-types {
    margin-bottom: var(--spacing-lg);
}

.instruction-types h3 {
    font-size: 2rem;
    text-align: center;
    margin-bottom: var(--spacing-sm);
}

.instruction-intro {
    text-align: center;
    font-size: 1.125rem;
    margin-bottom: var(--spacing-md);
}

.instruction-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
}

.instruction-card {
    padding: var(--spacing-md);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
}

.instruction-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--primary);
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.instruction-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

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

.instruction-header h4 {
    font-size: 1.25rem;
    margin: 0;
}

.instruction-description {
    margin-bottom: var(--spacing-sm);
    color: var(--text-secondary);
}

.instruction-example {
    padding: var(--spacing-sm);
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    border-left: 3px solid var(--primary);
}

.instruction-example code {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--primary-light);
}

.cta-box {
    margin-top: var(--spacing-lg);
    padding: var(--spacing-lg);
    background: var(--bg-card);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta-box::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--secondary), var(--accent));
}

.cta-box h3 {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
}

.cta-box p {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-md);
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

/* ============================================
   Model Section
   ============================================ */
.model-section {
    background: var(--bg-content-dark);
}

.model-overview {
    margin-bottom: var(--spacing-lg);
}

.model-diagram {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    overflow-x: auto;
}

.model-stage {
    flex: 1;
    min-width: 150px;
    text-align: center;
    padding: var(--spacing-md);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: var(--transition-normal);
}

.model-stage:hover {
    background: var(--bg-card-hover);
    border-color: var(--primary);
    transform: scale(1.05);
}

.model-stage.highlight {
    background: linear-gradient(135deg, rgba(0, 217, 255, 0.1), rgba(123, 97, 255, 0.1));
    border-color: var(--primary);
}

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

.model-stage h4 {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-xs);
}

.model-stage p {
    font-size: 0.875rem;
    color: var(--text-tertiary);
    margin: 0;
}

.stage-arrow {
    font-size: 2rem;
    color: var(--primary);
    font-weight: 700;
    flex-shrink: 0;
}

.model-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.model-feature-card {
    padding: var(--spacing-md);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: var(--transition-normal);
}

.model-feature-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--primary);
    transform: translateY(-5px);
}

.model-feature-card h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
    color: var(--primary);
}

.model-feature-card p {
    margin: 0;
}

.model-comparison {
    margin-bottom: var(--spacing-lg);
}

.model-comparison h3 {
    font-size: 2rem;
    text-align: center;
    margin-bottom: var(--spacing-md);
}

.comparison-table-wrapper {
    overflow-x: auto;
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.comparison-table thead {
    background: var(--bg-tertiary);
}

.comparison-table th {
    padding: var(--spacing-sm) var(--spacing-md);
    text-align: left;
    font-weight: 600;
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-color);
}

.comparison-table td {
    padding: var(--spacing-sm) var(--spacing-md);
    border-bottom: 1px solid var(--border-color-light);
}

.comparison-table tbody tr {
    transition: var(--transition-fast);
}

.comparison-table tbody tr:hover {
    background: var(--bg-card-hover);
}

.comparison-table tbody tr.highlight-row {
    background: rgba(0, 217, 255, 0.05);
}

.comparison-table tbody tr.highlight-row:hover {
    background: rgba(0, 217, 255, 0.1);
}

.rl-details {
    margin-bottom: var(--spacing-lg);
}

.rl-details h3 {
    font-size: 2rem;
    text-align: center;
    margin-bottom: var(--spacing-md);
}

.rl-content {
    padding: var(--spacing-lg);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.rl-text h4 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
}

.rl-text ul {
    margin: var(--spacing-md) 0;
    padding-left: var(--spacing-md);
}

.rl-text li {
    margin-bottom: var(--spacing-xs);
    color: var(--text-secondary);
}

.insight-text {
    margin-top: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-tertiary);
    border-left: 4px solid var(--primary);
    border-radius: var(--radius-sm);
}

/* ============================================
   Results Section
   ============================================ */
.results-section {
    background: var(--bg-content-light);
}

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

.benchmark-card {
    padding: var(--spacing-md);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    text-align: center;
    transition: var(--transition-normal);
}

.benchmark-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--primary);
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.benchmark-card h4 {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-md);
}

.benchmark-score {
    margin-bottom: var(--spacing-md);
}

.score-value {
    display: block;
    font-size: 3rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.score-label {
    display: block;
    font-size: 0.875rem;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.benchmark-card p {
    font-size: 0.95rem;
    margin: 0;
}

.key-findings {
    margin-bottom: var(--spacing-lg);
}

.key-findings h3 {
    font-size: 2rem;
    text-align: center;
    margin-bottom: var(--spacing-md);
}

.findings-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
}

.finding-card {
    padding: var(--spacing-md);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
}

.finding-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--primary);
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.finding-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
}

.finding-card h4 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
}

.finding-card p {
    margin: 0;
}

.quality-matters {
    margin-bottom: var(--spacing-lg);
}

.quality-content {
    padding: var(--spacing-lg);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.quality-content h3 {
    font-size: 2rem;
    text-align: center;
    margin-bottom: var(--spacing-md);
}

.quality-content > p {
    text-align: center;
    font-size: 1.125rem;
    max-width: 800px;
    margin: 0 auto var(--spacing-md);
}

.dataset-comparison-bars {
    max-width: 700px;
    margin: var(--spacing-lg) auto;
}

.comparison-bar {
    margin-bottom: var(--spacing-md);
}

.bar-label {
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.bar-wrapper {
    height: 40px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    overflow: hidden;
    position: relative;
}

.bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    display: flex;
    align-items: center;
    justify-content: flex-end;
    padding-right: var(--spacing-sm);
    color: var(--text-primary);
    font-weight: 600;
    transition: width 1s ease;
}

.comparison-note {
    text-align: center;
    font-size: 0.875rem;
    color: var(--text-tertiary);
    font-style: italic;
    margin-top: var(--spacing-md);
}

/* ============================================
   Examples Section
   ============================================ */
.examples-section {
    background: var(--bg-content-dark);
}

.app-categories {
    margin-bottom: var(--spacing-lg);
}

.category-tabs {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    flex-wrap: wrap;
}

.category-tab {
    padding: 0.75rem 1.5rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
}

.category-tab:hover {
    background: var(--bg-card-hover);
    color: var(--text-primary);
    border-color: var(--primary);
}

.category-tab.active {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: var(--text-primary);
    border-color: transparent;
}

.app-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
}

.app-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: var(--transition-normal);
}

.app-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--primary);
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.app-image {
    width: 100%;
    height: 200px;
    overflow: hidden;
    position: relative;
}

.app-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-normal);
}

.app-card:hover .app-image img {
    transform: scale(1.1);
}

.app-info {
    padding: var(--spacing-md);
}

.app-info h4 {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-xs);
}

.app-info p {
    font-size: 0.95rem;
    margin: 0;
}

.example-annotations {
    margin-top: var(--spacing-lg);
    padding: var(--spacing-lg);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    text-align: center;
}

.example-annotations h3 {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
}

.example-annotations > p {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-md);
}

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

.annotation-note {
    display: flex;
    gap: var(--spacing-sm);
    text-align: left;
    padding: var(--spacing-md);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: var(--transition-fast);
}

.annotation-note:hover {
    background: var(--bg-card-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.note-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.note-text strong {
    display: block;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

/* ============================================
   Team Section
   ============================================ */
.team-section {
    background: var(--bg-content-light);
}

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

.author-card {
    padding: var(--spacing-sm);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    text-align: center;
    font-weight: 500;
    transition: var(--transition-fast);
}

.author-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--primary);
}

.affiliations {
    text-align: center;
    margin-top: var(--spacing-lg);
}

.affiliation-note {
    font-size: 0.875rem;
    color: var(--text-tertiary);
    margin-bottom: var(--spacing-md);
}

.affiliation-list {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.affiliation-item {
    padding: 0.5rem 1rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 50px;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* ============================================
   Paper Section
   ============================================ */
.paper-section {
    background: var(--bg-content-dark);
}

.paper-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.paper-card, .citation-card {
    padding: var(--spacing-lg);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
}

.paper-card {
    text-align: center;
}

.paper-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-md);
}

.paper-card h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
}

.paper-card p {
    margin-bottom: var(--spacing-md);
}

.paper-buttons {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
}

.citation-card h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
}

.citation-box {
    padding: var(--spacing-md);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-sm);
    overflow-x: auto;
}

.citation-box pre {
    margin: 0;
    font-family: var(--font-mono);
    font-size: 0.875rem;
    line-height: 1.6;
    color: var(--text-secondary);
}

.copy-btn {
    width: 100%;
    justify-content: center;
}

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

.resource-card {
    padding: var(--spacing-md);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    text-align: center;
    transition: var(--transition-normal);
    text-decoration: none;
    display: block;
}

.resource-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--primary);
    transform: translateY(-5px);
}

.resource-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
}

.resource-card h4 {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.resource-card p {
    font-size: 0.95rem;
    margin: 0;
}

/* ============================================
   Footer
   ============================================ */
.footer {
    background: var(--bg-content-light);
    border-top: 1px solid var(--border-color);
    padding: var(--spacing-lg) 0 var(--spacing-md);
}

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

.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    font-weight: 700;
}

.footer-logo span {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-links {
    display: flex;
    gap: var(--spacing-md);
}

.footer-links a {
    color: var(--text-secondary);
    transition: var(--transition-fast);
}

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

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border-color-light);
}

.footer-bottom p {
    font-size: 0.875rem;
    color: var(--text-tertiary);
    margin: 0;
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 1024px) {
    .hero-title {
        font-size: 3rem;
    }
    
    .section-title {
        font-size: 2.5rem;
    }
    
    .model-diagram {
        flex-direction: column;
    }
    
    .stage-arrow {
        transform: rotate(90deg);
    }
}

@media (max-width: 768px) {
    .nav-container {
        padding: 1rem var(--spacing-sm);
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        right: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: var(--bg-secondary);
        flex-direction: column;
        padding: var(--spacing-md);
        transition: right var(--transition-normal);
        border-top: 1px solid var(--border-color);
    }
    
    .nav-menu.active {
        right: 0;
    }
    
    .theme-toggle {
        margin-right: var(--spacing-sm);
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .dataset-showcase {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .dataset-stats-cards {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .footer-links {
        flex-wrap: wrap;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }
    h3 { font-size: 1.5rem; }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .dataset-stats-grid,
    .benchmark-grid,
    .findings-grid,
    .app-gallery {
        grid-template-columns: 1fr;
    }
    
    .paper-content {
        grid-template-columns: 1fr;
    }
}

/* ============================================
   Utilities
   ============================================ */
.hidden {
    display: none !important;
}

.fade-in {
    animation: fadeIn 0.5s ease-in;
}

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

.slide-up {
    animation: slideUp 0.5s ease-out;
}

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