/* ========================================
   CoInteract Project Page Styles
   ======================================== */

/* CSS Variables */
:root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-card: #16161f;
    --bg-card-hover: #1c1c28;
    
    --accent-primary: #00f0ff;
    --accent-secondary: #7b2fff;
    --accent-tertiary: #ff2d6a;
    --accent-green: #00ff88;
    
    --text-primary: #ffffff;
    --text-secondary: #a0a0b0;
    --text-muted: #606070;
    
    --border-color: rgba(255, 255, 255, 0.08);
    --border-glow: rgba(0, 240, 255, 0.3);
    
    --font-display: 'Orbitron', sans-serif;
    --font-body: 'Rajdhani', sans-serif;
    
    --transition-fast: 0.2s ease;
    --transition-medium: 0.4s ease;
    --transition-slow: 0.8s ease;
    
    --glow-primary: 0 0 20px rgba(0, 240, 255, 0.5);
    --glow-secondary: 0 0 30px rgba(123, 47, 255, 0.4);
}

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

html {
    scroll-behavior: smooth;
}

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

/* Dynamic Background */
.bg-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    pointer-events: none;
}

#bgCanvas {
    width: 100%;
    height: 100%;
    opacity: 0.4;
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 10, 15, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition-medium);
}

.navbar.scrolled {
    background: rgba(10, 10, 15, 0.95);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 40px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-family: var(--font-display);
    font-size: 1.4rem;
    font-weight: 700;
    letter-spacing: 2px;
}

.logo-icon {
    color: var(--accent-primary);
    font-size: 1.8rem;
    text-shadow: var(--glow-primary);
    animation: pulse 2s ease-in-out infinite;
}

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

.nav-menu {
    display: flex;
    list-style: none;
    gap: 40px;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 1rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 1px;
    position: relative;
    padding: 8px 0;
    transition: var(--transition-fast);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    transition: var(--transition-medium);
}

.nav-link:hover { color: var(--text-primary); }
.nav-link:hover::after { width: 100%; }

.nav-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

.btn-github {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    background: transparent;
    border: 1px solid var(--accent-primary);
    color: var(--accent-primary);
    text-decoration: none;
    font-weight: 600;
    border-radius: 4px;
    transition: var(--transition-fast);
}

.btn-github:hover {
    background: var(--accent-primary);
    color: var(--bg-primary);
    box-shadow: var(--glow-primary);
}

/* ================================
   Hero Section - Centered Layout
   ================================ */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 80px 5% 30px;
    position: relative;
    overflow: hidden;
    text-align: center;
    gap: 0;
}

.hero::before {
    content: '';
    position: absolute;
    top: 30%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 1000px;
    height: 1000px;
    background: radial-gradient(circle, rgba(123, 47, 255, 0.12) 0%, transparent 70%);
    pointer-events: none;
    z-index: 0;
}

.hero-content-centered {
    max-width: 1000px;
    z-index: 2;
    margin-bottom: 50px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    background: rgba(0, 240, 255, 0.1);
    border: 1px solid rgba(0, 240, 255, 0.3);
    border-radius: 30px;
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--accent-primary);
    margin-bottom: 30px;
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: var(--accent-primary);
    border-radius: 50%;
    animation: blink 1.5s ease-in-out infinite;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}

.hero-title-main {
    font-family: var(--font-display);
    font-size: 4.5rem;
    font-weight: 900;
    letter-spacing: 10px;
    line-height: 1;
    margin-bottom: 12px;
    background: linear-gradient(135deg, #e0e0e0 0%, #ffffff 40%, #b0b0b0 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: none;
    animation: titleGlow 3s ease-in-out infinite alternate;
}

@keyframes titleGlow {
    0% { filter: drop-shadow(0 0 10px rgba(0,240,255,0)); }
    100% { filter: drop-shadow(0 0 20px rgba(0,240,255,0.3)); }
}

.hero-subtitle {
    font-family: var(--font-body);
    font-size: 1.2rem;
    font-weight: 400;
    color: var(--accent-secondary);
    line-height: 1.4;
    margin-bottom: 12px;
    letter-spacing: 0.5px;
    opacity: 0.85;
}

.hero-team {
    margin-bottom: 16px;
}

.team-badge {
    display: inline-block;
    padding: 8px 28px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 30px;
    font-size: 1rem;
    font-weight: 600;
    letter-spacing: 2px;
    color: var(--text-secondary);
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
}

.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 20px;
}
.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 36px;
    font-size: 1rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    text-decoration: none;
    border-radius: 4px;
    transition: var(--transition-fast);
    cursor: pointer;
    border: none;
}

.btn-pill {
    padding: 14px 32px;
    border-radius: 50px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.15);
    color: var(--text-primary);
    font-size: 0.95rem;
    font-weight: 600;
    backdrop-filter: blur(10px);
    transition: var(--transition-medium);
}

.btn-pill:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: var(--accent-primary);
    box-shadow: 0 0 25px rgba(0, 240, 255, 0.2);
    transform: translateY(-2px);
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: var(--bg-primary);
}

.btn-primary:hover {
    box-shadow: 0 0 30px rgba(0, 240, 255, 0.5);
    transform: translateY(-2px);
}

.btn-secondary {
    background: transparent;
    border: 2px solid var(--accent-secondary);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background: var(--accent-secondary);
    box-shadow: var(--glow-secondary);
    transform: translateY(-2px);
}

/* Hero Video - Full Width */
.hero-video-full {
    width: 100%;
    max-width: 800px;
    z-index: 2;
}

.hero-video-wrapper {
    width: 100%;
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    box-shadow: 0 10px 60px rgba(0, 0, 0, 0.4);
    position: relative;
}

.hero-video-wrapper video {
    display: block;
    width: 100%;
    height: auto;
    border-radius: 12px;
    background: #000;
}

/* Custom video controls styling */
video::-webkit-media-controls-panel {
    background: linear-gradient(transparent, rgba(0,0,0,0.7));
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    color: var(--text-muted);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    z-index: 2;
}

.scroll-line {
    width: 1px;
    height: 50px;
    background: linear-gradient(to bottom, var(--accent-primary), transparent);
    animation: scrollLine 2s ease-in-out infinite;
}

@keyframes scrollLine {
    0% { transform: scaleY(0); transform-origin: top; }
    50% { transform: scaleY(1); transform-origin: top; }
    51% { transform: scaleY(1); transform-origin: bottom; }
    100% { transform: scaleY(0); transform-origin: bottom; }
}

/* ================================
   Common Section Styles
   ================================ */
section {
    padding: 70px 40px;
    max-width: 1400px;
    margin: 0 auto;
}

.section-header {
    text-align: center;
    margin-bottom: 50px;
}

.section-title {
    font-family: var(--font-display);
    font-size: 2.8rem;
    font-weight: 700;
    letter-spacing: 4px;
    margin-bottom: 16px;
    background: linear-gradient(135deg, var(--text-primary), var(--accent-primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 4px;
}

.demo-quality-note {
    font-size: 0.75rem;
    color: rgba(255,255,255,0.35);
    font-style: italic;
    margin-top: 8px;
    letter-spacing: 0.5px;
}

/* ================================
   Features Section
   ================================ */
.features {
    background: linear-gradient(180deg, transparent, rgba(123, 47, 255, 0.05), transparent);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
}

.feature-card {
    position: relative;
    padding: 40px 30px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    text-align: center;
    transition: var(--transition-medium);
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    transform: scaleX(0);
    transition: var(--transition-medium);
}

.feature-card:hover {
    transform: translateY(-8px);
    border-color: var(--accent-primary);
    background: var(--bg-card-hover);
}

.feature-card:hover::before { transform: scaleX(1); }

.feature-icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.feature-title {
    font-family: var(--font-display);
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 16px;
    letter-spacing: 1px;
}

.feature-desc {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

.feature-glow {
    position: absolute;
    bottom: -50%;
    left: 50%;
    transform: translateX(-50%);
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, rgba(0, 240, 255, 0.15) 0%, transparent 70%);
    opacity: 0;
    transition: var(--transition-medium);
    pointer-events: none;
}

.feature-card:hover .feature-glow { opacity: 1; }

/* ================================
   Demo Section & Sub-sections
   ================================ */
.demo {
    background: var(--bg-secondary);
    max-width: 100%;
    padding: 120px 40px;
}

.demo .section-header,
.demo .demo-subsection {
    max-width: 1400px;
    margin-left: auto;
    margin-right: auto;
}

.demo-subsection {
    margin-bottom: 50px;
    position: relative;
}

.demo-subsection:last-child {
    margin-bottom: 0;
}

.subsection-title {
    font-family: var(--font-display);
    font-size: 1.6rem;
    font-weight: 700;
    letter-spacing: 2px;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 16px;
}

.subsection-num {
    font-size: 0.85rem;
    font-weight: 700;
    padding: 4px 12px;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: var(--bg-primary);
    border-radius: 4px;
    letter-spacing: 1px;
}

.subsection-desc {
    font-size: 1.05rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
    line-height: 1.6;
}

/* Demo Gallery Grid */
.demo-gallery {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 12px;
}

.demo-video-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    overflow: hidden;
    transition: var(--transition-medium);
}

.demo-video-card video {
    display: block;
    width: 100%;
    aspect-ratio: 9/16;
    object-fit: cover;
}

.demo-video-card:hover {
    border-color: var(--accent-primary);
    transform: translateY(-4px);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
}

/* ===== InteractDemo / TryOn Section ===== */
.interact-cases,
.tryon-cases {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.tryon-cases {
    grid-template-columns: repeat(3, 1fr);
}

.interact-case {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    padding: 12px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    transition: var(--transition-medium);
}

.interact-case:hover {
    border-color: var(--accent-primary);
    box-shadow: 0 8px 32px rgba(0, 240, 255, 0.08);
}

.interact-inputs {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}

.interact-img-wrap {
    width: 60px;
    text-align: center;
    flex-shrink: 0;
}

.interact-img-wrap img {
    width: 60px;
    height: 80px;
    object-fit: cover;
    border-radius: 10px;
    border: 1px solid var(--border-color);
}

.interact-label {
    display: block;
    margin-top: 6px;
    font-size: 0.75rem;
    color: var(--text-muted);
    font-family: var(--font-display);
    letter-spacing: 1px;
    text-transform: uppercase;
}

.interact-plus {
    font-size: 1.2rem;
    color: var(--text-muted);
    font-weight: 300;
}

.interact-arrow {
    font-size: 1.4rem;
    color: var(--accent-primary);
    font-weight: 300;
}

.interact-output {
    width: 100%;
    max-width: 200px;
    min-width: 0;
    margin: 0 auto;
}

.interact-output video {
    width: 100%;
    aspect-ratio: 9/16;
    object-fit: cover;
    border-radius: 6px;
    display: block;
}

.interact-prompts {
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-top: 4px;
}

.prompt-step {
    display: flex;
    gap: 8px;
    align-items: flex-start;
    padding: 6px 8px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 6px;
    border-left: 2px solid var(--accent-primary);
}

.prompt-num {
    flex-shrink: 0;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--accent-primary);
    color: var(--bg-primary);
    font-size: 0.65rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 1px;
}

.prompt-step p {
    font-size: 0.65rem;
    color: var(--text-muted);
    line-height: 1.5;
    margin: 0;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* ===== Co-Generation Section ===== */
.cogen-cases {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.cogen-case {
    padding: 12px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    transition: var(--transition-medium);
}

.cogen-case:hover {
    border-color: var(--accent-secondary);
    box-shadow: 0 8px 32px rgba(123, 47, 255, 0.08);
}

.cogen-inputs {
    display: flex;
    align-items: center;
    gap: 8px;
    justify-content: center;
    margin-bottom: 12px;
}

.cogen-outputs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
}

.cogen-video-wrap {
    text-align: center;
}

.cogen-video-wrap video {
    width: 100%;
    max-width: 200px;
    margin: 0 auto;
    aspect-ratio: 9/16;
    object-fit: cover;
    border-radius: 6px;
    display: block;
}

.cogen-label {
    display: block;
    margin-top: 8px;
    font-size: 0.85rem;
    color: var(--accent-primary);
    font-family: var(--font-display);
    letter-spacing: 1px;
}

/* ===== MoE Visualization Section ===== */
.moe-cases {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.moe-case {
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding: 12px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    align-items: start;
    transition: var(--transition-medium);
}

.moe-case:hover {
    border-color: var(--accent-primary);
    box-shadow: 0 8px 32px rgba(0, 240, 255, 0.08);
}

.moe-main {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
}

.moe-main video {
    width: 100%;
    max-width: 200px;
    margin: 0 auto;
    aspect-ratio: 9/16;
    object-fit: cover;
    border-radius: 6px;
    display: block;
}

.moe-label {
    display: block;
    margin-top: 8px;
    font-size: 0.8rem;
    color: var(--accent-primary);
    font-family: var(--font-display);
    letter-spacing: 1px;
}

.moe-experts {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
}

.moe-expert {
    text-align: center;
}

.moe-expert video {
    width: 100%;
    aspect-ratio: 9/16;
    object-fit: cover;
    border-radius: 6px;
    display: block;
    border: 1px solid var(--border-color);
}

/* ===== SOTA Comparison Section ===== */
.compare-case {
    padding: 24px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    margin-bottom: 40px;
    transition: var(--transition-medium);
}

.compare-case:last-child {
    margin-bottom: 0;
}

.compare-case:hover {
    border-color: var(--accent-primary);
}

.compare-ref {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 20px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
}

.compare-ref-img {
    text-align: center;
}

.compare-ref-img img {
    width: 100px;
    height: 140px;
    object-fit: cover;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.compare-ref-label {
    display: block;
    margin-top: 6px;
    font-size: 0.72rem;
    color: var(--text-muted);
    font-family: var(--font-display);
    letter-spacing: 1px;
    text-transform: uppercase;
}

.compare-methods {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 8px;
}

.compare-method {
    text-align: center;
}

.compare-method video {
    width: 100%;
    aspect-ratio: 9/16;
    object-fit: cover;
    border-radius: 8px;
    display: block;
    border: 1px solid var(--border-color);
    transition: var(--transition-medium);
}

.compare-method:hover video {
    border-color: var(--accent-primary);
}

.compare-method.ours video {
    border-color: var(--accent-primary);
    box-shadow: 0 0 16px rgba(0, 240, 255, 0.2);
}

.compare-method-label {
    display: block;
    margin-top: 6px;
    font-size: 0.72rem;
    color: var(--text-secondary);
    font-family: var(--font-display);
    letter-spacing: 0.5px;
}

.compare-method.ours .compare-method-label {
    color: var(--accent-primary);
    font-weight: 600;
}

/* Compare Carousel */
.compare-carousel {
    position: relative;
    overflow: hidden;
    max-width: 1200px;
    margin: 0 auto;
}

.carousel-track {
    display: flex;
    transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.carousel-track .compare-case {
    min-width: 100%;
    max-width: 100%;
    width: 100%;
    flex-shrink: 0;
    margin-bottom: 0;
    box-sizing: border-box;
    overflow: hidden;
}

.carousel-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 10;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 1px solid var(--border-color);
    background: rgba(15, 15, 23, 0.85);
    color: var(--text-primary);
    font-size: 1.6rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
    backdrop-filter: blur(8px);
}

.carousel-btn:hover {
    border-color: var(--accent-primary);
    background: rgba(0, 240, 255, 0.1);
    color: var(--accent-primary);
}

.carousel-prev { left: 8px; }
.carousel-next { right: 8px; }

.carousel-dots {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 20px;
}

.carousel-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--border-color);
    cursor: pointer;
    transition: var(--transition-fast);
}

.carousel-dot.active {
    background: var(--accent-primary);
    box-shadow: 0 0 8px rgba(0, 240, 255, 0.4);
}

/* ================================
   Architecture Section
   ================================ */
.architecture-container {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 60px;
    align-items: center;
}

.architecture-diagram {
    position: relative;
}

.arch-placeholder {
    width: 100%;
    min-height: 400px;
    background: linear-gradient(135deg, var(--bg-card), var(--bg-secondary));
    border: 1px solid var(--border-color);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.architecture-details {
    display: flex;
    flex-direction: column;
    gap: 40px;
}

.arch-item {
    position: relative;
    padding-left: 80px;
}

.arch-number {
    position: absolute;
    left: 0;
    top: 0;
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 900;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    opacity: 0.5;
}

.arch-item h4 {
    font-family: var(--font-display);
    font-size: 1.3rem;
    margin-bottom: 12px;
}

.arch-item p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* ================================
   Papers Section
   ================================ */
.papers-list {
    max-width: 1200px;
    margin: 0 auto;
}

.paper-card {
    display: flex;
    gap: 30px;
    padding: 40px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    transition: var(--transition-medium);
}

.paper-card:hover {
    border-color: var(--accent-primary);
    box-shadow: 0 0 30px rgba(0, 240, 255, 0.1);
}

.paper-icon {
    font-size: 2.5rem;
    flex-shrink: 0;
}

.paper-content { flex: 1; }

.paper-title {
    font-family: var(--font-display);
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 16px;
    line-height: 1.5;
}

.paper-authors {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.author { color: var(--accent-primary); }

.paper-venue {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 20px;
}

.paper-links {
    display: flex;
    gap: 20px;
}

.paper-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: var(--transition-fast);
}

.paper-link:hover { color: var(--accent-primary); }

/* Paper Author Annotations */
.equal-contrib {
    color: var(--accent-tertiary);
    font-size: 0.75rem;
    margin-left: 1px;
}

.paper-affiliations {
    display: flex;
    gap: 20px;
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 8px;
}

.paper-affiliations sup {
    color: var(--accent-primary);
    font-size: 0.7rem;
}

.paper-notes {
    display: flex;
    gap: 10px;
    font-size: 0.82rem;
    color: var(--text-muted);
    font-style: italic;
    margin-bottom: 12px;
}

/* BibTeX Box */
.bibtex-box {
    position: relative;
    margin-top: 20px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 20px;
    overflow-x: auto;
}

.bibtex-box pre {
    margin: 0;
    font-size: 0.82rem;
    line-height: 1.6;
    color: var(--text-secondary);
    white-space: pre-wrap;
    word-break: break-all;
}

.bibtex-box code {
    font-family: 'Courier New', monospace;
}

.copy-bibtex {
    position: absolute;
    top: 12px;
    right: 12px;
    padding: 6px 16px;
    background: transparent;
    border: 1px solid var(--accent-primary);
    color: var(--accent-primary);
    font-size: 0.8rem;
    font-weight: 600;
    border-radius: 4px;
    cursor: pointer;
    transition: var(--transition-fast);
}

.copy-bibtex:hover {
    background: var(--accent-primary);
    color: var(--bg-primary);
}

/* ================================
   Team Section
   ================================ */
.team-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 16px;
}

.team-card {
    position: relative;
    padding: 20px 12px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    text-align: center;
    transition: var(--transition-medium);
}

.team-card:hover {
    transform: translateY(-8px);
    border-color: var(--accent-secondary);
    box-shadow: 0 10px 40px rgba(123, 47, 255, 0.2);
}

.team-avatar {
    width: 70px;
    height: 70px;
    margin: 0 auto 14px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    padding: 3px;
}

.avatar-placeholder {
    width: 100%;
    height: 100%;
    background: var(--bg-card);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
}

.team-name {
    font-family: var(--font-display);
    font-size: 0.9rem;
    margin-bottom: 6px;
}

.team-role {
    font-size: 0.78rem;
    color: var(--text-secondary);
    margin-bottom: 10px;
}

.team-links {
    display: flex;
    justify-content: center;
    gap: 12px;
}

.team-link {
    color: var(--accent-primary);
    text-decoration: none;
    font-size: 0.75rem;
    transition: var(--transition-fast);
}

.team-link:hover { text-decoration: underline; }

.team-affil {
    font-size: 0.72rem;
    color: var(--accent-primary);
    margin-bottom: 10px;
    opacity: 0.7;
}

/* Highlighted co-first author cards */
.team-card.highlight {
    border-color: var(--accent-primary);
    box-shadow: 0 0 20px rgba(0, 240, 255, 0.15), inset 0 0 30px rgba(0, 240, 255, 0.03);
}

.team-card.highlight::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 12px;
    border: 1px solid transparent;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary)) border-box;
    -webkit-mask: linear-gradient(#fff 0 0) padding-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    opacity: 0.5;
    pointer-events: none;
}

/* Corresponding Author / Lead badge */
.lead-badge {
    display: inline-block;
    padding: 1px 6px;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: var(--bg-primary);
    font-size: 0.65rem;
    font-weight: 700;
    border-radius: 3px;
    letter-spacing: 0.5px;
}

/* ================================
   Footer
   ================================ */
.footer {
    padding: 60px 40px;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    text-align: center;
}

.footer-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    font-family: var(--font-display);
    font-size: 1.3rem;
    margin-bottom: 20px;
}

.footer-text {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 20px;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 20px;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: var(--transition-fast);
}

.footer-links a:hover { color: var(--accent-primary); }
.divider { color: var(--text-muted); }

/* ================================
   Scroll Reveal Animations
   ================================ */
.reveal-up {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal-up.revealed {
    opacity: 1;
    transform: translateY(0);
}

/* Stagger delay for children */
.stagger-children > *:nth-child(1) { transition-delay: 0s; }
.stagger-children > *:nth-child(2) { transition-delay: 0.1s; }
.stagger-children > *:nth-child(3) { transition-delay: 0.2s; }
.stagger-children > *:nth-child(4) { transition-delay: 0.3s; }
.stagger-children > *:nth-child(5) { transition-delay: 0.4s; }
.stagger-children > *:nth-child(6) { transition-delay: 0.5s; }
.stagger-children > *:nth-child(7) { transition-delay: 0.6s; }
.stagger-children > *:nth-child(8) { transition-delay: 0.7s; }
.stagger-children > *:nth-child(9) { transition-delay: 0.8s; }
.stagger-children > *:nth-child(10) { transition-delay: 0.9s; }

/* Glowing separator line between subsections */
.demo-subsection + .demo-subsection::before {
    content: '';
    display: block;
    width: 40%;
    max-width: 300px;
    height: 1px;
    margin: 0 auto 50px;
    background: linear-gradient(90deg, transparent, var(--accent-primary), var(--accent-secondary), transparent);
    opacity: 0.4;
}

/* ================================
   Responsive Design
   ================================ */
@media (max-width: 1200px) {
    .hero-title-main {
        font-size: 4.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.3rem;
    }
    
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .team-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .architecture-container {
        grid-template-columns: 1fr;
    }
    
    .demo-gallery {
        grid-template-columns: repeat(5, 1fr);
    }

    .compare-methods {
        grid-template-columns: repeat(4, 1fr);
    }

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

    .interact-cases,
    .tryon-cases,
    .cogen-cases,
    .moe-cases {
        grid-template-columns: repeat(2, 1fr);
    }

    .team-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .hero {
        padding: 100px 20px 60px;
    }
    
    .hero-title-main {
        font-size: 2.8rem;
        letter-spacing: 4px;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .hero-video-full {
        width: 100%;
        max-width: 100%;
    }
    
    .demo-gallery {
        grid-template-columns: repeat(3, 1fr);
    }

    .interact-cases,
    .tryon-cases,
    .cogen-cases,
    .moe-cases {
        grid-template-columns: 1fr;
    }

    .interact-case {
        flex-direction: column;
    }

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

    .interact-arrow {
        transform: rotate(90deg);
    }

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

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

    .moe-experts {
        grid-template-columns: repeat(3, 1fr);
    }

    .compare-methods {
        grid-template-columns: repeat(3, 1fr);
    }

    .compare-ref-img img {
        width: 80px;
        height: 110px;
    }

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

    .team-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    section {
        padding: 50px 20px;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .hero-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .btn-pill {
        width: 100%;
        justify-content: center;
    }
}

/* ================================
   Image Lightbox
   ================================ */
.lightbox-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.9);
    backdrop-filter: blur(10px);
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
    cursor: zoom-out;
}

.lightbox-overlay.active {
    opacity: 1;
    visibility: visible;
}

.lightbox-img {
    max-width: 90vw;
    max-height: 85vh;
    object-fit: contain;
    border-radius: 8px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    transform: scale(0.9);
    transition: transform 0.3s ease;
}

.lightbox-overlay.active .lightbox-img {
    transform: scale(1);
}

.lightbox-close {
    position: absolute;
    top: 24px;
    right: 32px;
    font-size: 2.5rem;
    color: rgba(255, 255, 255, 0.7);
    cursor: pointer;
    transition: color 0.2s;
    z-index: 10001;
    line-height: 1;
}

.lightbox-close:hover {
    color: #fff;
}

/* Clickable reference images */
.interact-img-wrap img,
.compare-ref-img img {
    cursor: zoom-in;
    transition: transform 0.2s ease, border-color 0.2s ease;
}

.interact-img-wrap img:hover,
.compare-ref-img img:hover {
    border-color: var(--accent-primary);
    transform: scale(1.05);
}