/* ========================================
   MMaDA-VLA Project Page Styles
   Minimalist Academic Design
   ======================================== */

/* CSS Variables */
:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #3b82f6;
    --accent: #8b5cf6;
    --accent-light: #a78bfa;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-muted: #9ca3af;
    --bg-primary: #ffffff;
    --bg-secondary: #f9fafb;
    --bg-tertiary: #f3f4f6;
    --border: #e5e7eb;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --radius-sm: 6px;
    --radius: 12px;
    --radius-lg: 16px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --max-width: 1200px;
}

/* Reset & Base */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: inherit;
    text-decoration: none;
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* ========================================
   Navigation
   ======================================== */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(229, 231, 235, 0.5);
    transition: var(--transition);
}

.nav-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    font-size: 1.25rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    gap: 32px;
}

.nav-links a {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: var(--transition);
    position: relative;
}

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

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: var(--transition);
}

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

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

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: var(--transition);
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 120px 24px 80px;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(ellipse at 20% 30%, rgba(37, 99, 235, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 70%, rgba(139, 92, 246, 0.06) 0%, transparent 50%),
        linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    z-index: -1;
}

.hero-content {
    text-align: center;
    max-width: 900px;
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 24px;
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 50%, var(--primary-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    background-size: 200% auto;
    animation: gradient-shift 5s ease infinite;
}

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

.hero-subtitle {
    font-size: clamp(1.125rem, 2.5vw, 1.5rem);
    font-weight: 400;
    color: var(--text-secondary);
    line-height: 1.5;
    margin-bottom: 40px;
}

.hero-talk {
    margin: 0 auto 40px;
    max-width: 900px;
    background: rgba(255, 255, 255, 0.72);
    border: 1px solid rgba(255, 255, 255, 0.7);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    padding: 18px;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.hero-talk-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    margin-bottom: 14px;
    flex-wrap: wrap;
}

.hero-talk-badge {
    display: inline-flex;
    align-items: center;
    padding: 6px 12px;
    border-radius: 999px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: white;
    font-size: 0.8125rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.hero-talk-caption {
    font-size: 0.9375rem;
    color: var(--text-secondary);
}

.hero-talk-video {
    border-radius: var(--radius);
    overflow: hidden;
    background: #000;
}

.hero-talk-video video {
    width: 100%;
    height: auto;
    display: block;
    max-height: 520px;
}

/* Authors */
.authors {
    margin-bottom: 40px;
}

.author-list {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px 16px;
    margin-bottom: 16px;
}

.author {
    font-size: 0.9375rem;
    color: var(--text-primary);
}

.author sup {
    font-size: 0.625rem;
    color: var(--text-muted);
    margin-left: 2px;
}

.affiliations {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 6px 20px;
    margin-bottom: 12px;
}

.affil {
    font-size: 0.8125rem;
    color: var(--text-secondary);
}

.affil sup {
    font-size: 0.625rem;
    color: var(--text-muted);
    margin-right: 2px;
}

.email {
    font-size: 0.8125rem;
    color: var(--text-muted);
}

/* Hero Buttons */
.hero-buttons {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
    margin-bottom: 48px;
    position: relative;
    z-index: 10;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: 100px;
    font-size: 0.9375rem;
    font-weight: 500;
    transition: var(--transition);
    border: none;
    cursor: pointer;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    box-shadow: 0 4px 14px rgba(37, 99, 235, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(37, 99, 235, 0.5);
}

.btn-secondary {
    background: white;
    color: var(--text-primary);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
    background: var(--bg-secondary);
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-2px);
}

/* Dropdown Menu */
.dropdown-toggle::after {
    content: '▼';
    font-size: 0.7em;
    margin-left: 4px;
}

.serial-work-wrapper {
    position: relative;
    display: inline-block;
}

#serial-work-menu {
    position: absolute;
    top: 100%;
    left: 0;
    margin-top: 4px;
    background: white;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    box-shadow: 0 8px 24px rgba(0,0,0,0.15);
    min-width: 160px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-5px);
    transition: opacity 0.2s ease, visibility 0.2s ease, transform 0.2s ease;
    z-index: 99999;
    overflow: hidden;
}

.serial-work-wrapper:hover #serial-work-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    color: var(--text-primary);
    font-size: 0.9rem;
    transition: var(--transition);
    text-decoration: none;
}

.dropdown-item:hover {
    background: var(--bg-secondary);
    color: var(--primary);
}

.dropdown-item:not(:last-child) {
    border-bottom: 1px solid var(--border);
}

/* Hero Stats */
.hero-stats {
    display: flex;
    justify-content: center;
    gap: 48px;
    flex-wrap: wrap;
}

.stat {
    text-align: center;
}

.stat-value {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    opacity: 0.6;
    animation: bounce 2s infinite;
}

.scroll-text {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.scroll-arrow {
    width: 20px;
    height: 20px;
    border-right: 2px solid var(--text-muted);
    border-bottom: 2px solid var(--text-muted);
    transform: rotate(45deg);
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
    40% { transform: translateX(-50%) translateY(-10px); }
    60% { transform: translateX(-50%) translateY(-5px); }
}

/* ========================================
   Section Styles
   ======================================== */
.section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-title {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
}

.subsection-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 24px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.subsection-title::before {
    content: '';
    width: 4px;
    height: 24px;
    background: linear-gradient(180deg, var(--primary), var(--accent));
    border-radius: 2px;
}

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

.abstract-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: 40px;
    margin-bottom: 48px;
}

.teaser-image {
    margin-bottom: 32px;
}

.teaser-image img {
    width: 100%;
    border-radius: var(--radius);
}

.abstract-text {
    font-size: 1.0625rem;
    line-height: 1.8;
    color: var(--text-primary);
    margin-bottom: 20px;
}

.abstract-text:last-child {
    margin-bottom: 0;
}

.highlight {
    color: var(--primary);
    font-weight: 600;
}

/* Key Features */
.key-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 24px;
}

.feature {
    background: white;
    border-radius: var(--radius);
    padding: 32px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border);
    transition: var(--transition);
}

.feature:hover {
    transform: translateY(-4px);
    border-color: var(--primary-light);
}

.feature-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.1), rgba(139, 92, 246, 0.1));
    border-radius: var(--radius);
    font-size: 1.5rem;
    color: var(--primary);
}

.feature h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 8px;
}

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

/* ========================================
   Method Section
   ======================================== */
.method-section {
    background: var(--bg-primary);
}

.method-overview {
    margin-bottom: 64px;
}

.method-visual {
    margin-bottom: 48px;
}

.method-image {
    width: 100%;
    border-radius: var(--radius-lg);
}

.figure-placeholder {
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
    border: 2px dashed var(--border);
    aspect-ratio: 16/9;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.figure-placeholder:hover {
    border-color: var(--primary-light);
    background: rgba(37, 99, 235, 0.03);
}

.placeholder-content {
    text-align: center;
    color: var(--text-muted);
}

.placeholder-content i {
    font-size: 3rem;
    margin-bottom: 16px;
    display: block;
}

.placeholder-content span {
    display: block;
    font-size: 1.125rem;
    font-weight: 500;
    margin-bottom: 4px;
}

.placeholder-content small {
    font-size: 0.875rem;
    opacity: 0.8;
}

/* Method Steps */
.method-steps {
    display: grid;
    gap: 24px;
}

.step {
    display: flex;
    gap: 24px;
    padding: 24px;
    background: var(--bg-secondary);
    border-radius: var(--radius);
    border-left: 4px solid var(--primary);
    transition: var(--transition);
}

.step:hover {
    background: white;
}

.step-number {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    opacity: 0.5;
    min-width: 48px;
}

.step-content h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.step-content p {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Architecture Grid */
.arch-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
}

.arch-card {
    background: var(--bg-secondary);
    border-radius: var(--radius);
    padding: 24px;
    transition: var(--transition);
}

.arch-card:hover {
    background: white;
}

.arch-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}

.arch-header i {
    font-size: 1.25rem;
    color: var(--primary);
}

.arch-header h4 {
    font-size: 1rem;
    font-weight: 600;
}

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

/* ========================================
   Demo Section
   ======================================== */
.demo-section {
    background: var(--bg-secondary);
}

.main-video {
    margin-bottom: 64px;
}

.video-container {
    border-radius: var(--radius-lg);
    overflow: hidden;
    margin-bottom: 20px;
    background: #000;
}

.video-container video {
    width: 100%;
    height: auto;
    display: block;
}

.video-wrapper {
    position: relative;
    background: #000;
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.video-wrapper video {
    width: 100%;
    height: auto;
    display: block;
    aspect-ratio: 4/3;
    object-fit: cover;
}

.video-placeholder {
    background: linear-gradient(135deg, #1f2937, #374151);
    aspect-ratio: 16/9;
    display: flex;
    align-items: center;
    justify-content: center;
}

.video-placeholder .placeholder-content {
    color: rgba(255, 255, 255, 0.8);
}

.video-placeholder.small {
    aspect-ratio: 4/3;
}

.video-caption {
    text-align: center;
}

.video-caption h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.video-caption p {
    font-size: 0.9375rem;
    color: var(--text-secondary);
}

/* Task Videos Grid */
.task-videos {
    margin-bottom: 64px;
}

.videos-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
}

.video-card {
    background: white;
    border-radius: var(--radius);
    overflow: hidden;
    transition: var(--transition);
}

.video-card:hover {
    transform: translateY(-4px);
}

.video-card.small {
    max-width: 280px;
}

.video-wrapper {
    position: relative;
}

.video-info {
    padding: 20px;
}

.video-info h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 4px;
}

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

/* Comparison Videos */
.comparison-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}

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

.comparison-item p {
    margin-top: 12px;
    font-size: 0.9375rem;
    color: var(--text-secondary);
}

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

.result-block {
    margin-bottom: 80px;
}

.result-block:last-child {
    margin-bottom: 0;
}

.result-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
}

.result-content.reverse {
    direction: rtl;
}

.result-content.reverse > * {
    direction: ltr;
}

.result-image {
    width: 100%;
    border-radius: var(--radius-lg);
}

.chart-placeholder {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    aspect-ratio: 4/3;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px dashed var(--border);
}

.result-stats {
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.result-highlight {
    text-align: center;
    padding: 32px;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.05), rgba(139, 92, 246, 0.05));
    border-radius: var(--radius);
    border: 1px solid rgba(37, 99, 235, 0.1);
}

.result-value {
    display: block;
    font-size: 3.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.result-label {
    font-size: 1rem;
    color: var(--text-secondary);
}

/* Breakdown Bars */
.result-breakdown {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.breakdown-item {
    display: grid;
    grid-template-columns: 80px 1fr 60px;
    align-items: center;
    gap: 16px;
}

.breakdown-label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.breakdown-bar {
    height: 8px;
    background: var(--bg-tertiary);
    border-radius: 4px;
    overflow: hidden;
}

.bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    border-radius: 4px;
    transition: width 1s ease;
}

.breakdown-value {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--primary);
    text-align: right;
}

/* CALVIN Breakdown */
.calvin-breakdown {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 12px;
}

.calvin-item {
    text-align: center;
    padding: 16px;
    background: var(--bg-secondary);
    border-radius: var(--radius);
    transition: var(--transition);
}

.calvin-item:hover {
    background: white;
}

.calvin-step {
    display: block;
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-bottom: 8px;
}

.calvin-value {
    display: block;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary);
}

/* Real World Results */
.real-world-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 48px;
}

.real-world-figure {
    margin-top: 32px;
    background: white;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    padding: 12px;
    box-shadow: var(--shadow-sm);
}

.real-world-figure-embed {
    display: block;
    width: 100%;
    height: auto;
    border-radius: var(--radius-sm);
}

.setup-info {
    background: var(--bg-secondary);
    border-radius: var(--radius);
    padding: 32px;
}

.setup-image {
    margin-top: 24px;
}

.setup-image img {
    width: 100%;
    border-radius: var(--radius-sm);
}

.setup-info h4 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 20px;
}

.setup-info ul {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.setup-info li {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.9375rem;
    color: var(--text-secondary);
}

.setup-info i {
    color: var(--primary);
    width: 20px;
}

.task-results {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 16px;
}

.task-result-card {
    background: white;
    border-radius: var(--radius);
    padding: 24px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border);
    transition: var(--transition);
}

.task-result-card:hover {
    transform: translateY(-4px);
    border-color: var(--primary-light);
}

.task-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.1), rgba(139, 92, 246, 0.1));
    border-radius: var(--radius-sm);
    color: var(--primary);
    font-size: 1.25rem;
}

.task-name {
    display: block;
    font-size: 0.9375rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.task-rate {
    display: block;
    font-size: 0.75rem;
    color: var(--primary);
    font-weight: 500;
}

/* Real-world Chart Styles */
.real-world-chart {
    background: white;
    border-radius: var(--radius);
    padding: 32px;
    border: 1px solid var(--border);
}

.real-world-chart h4 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 24px;
    text-align: center;
}

.rw-chart-container {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-bottom: 24px;
}

.rw-chart-item {
    display: flex;
    align-items: center;
    gap: 16px;
}

.rw-task-name {
    width: 120px;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
    flex-shrink: 0;
}

.rw-bars {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.rw-bar-group {
    height: 24px;
    background: var(--bg-tertiary);
    border-radius: 4px;
    overflow: hidden;
    position: relative;
}

.rw-bar {
    height: 100%;
    border-radius: 4px;
    display: flex;
    align-items: center;
    padding-left: 10px;
    transition: width 1s ease;
    min-width: fit-content;
}

.rw-bar.baseline {
    background: linear-gradient(90deg, #9ca3af, #d1d5db);
}

.rw-bar.ours {
    background: linear-gradient(90deg, var(--primary), var(--accent));
}

.rw-bar-label {
    font-size: 0.75rem;
    font-weight: 600;
    color: white;
    white-space: nowrap;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}

.rw-legend {
    display: flex;
    justify-content: center;
    gap: 32px;
    padding-top: 16px;
    border-top: 1px solid var(--border);
}

.rw-legend-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.rw-legend-color {
    width: 16px;
    height: 16px;
    border-radius: 4px;
}

.rw-legend-color.baseline {
    background: linear-gradient(135deg, #9ca3af, #d1d5db);
}

.rw-legend-color.ours {
    background: linear-gradient(135deg, var(--primary), var(--accent));
}

/* Demo Results - Task Rows */
.demo-results {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: 32px;
}

.performance-chart {
    width: 100%;
}

.task-demo-row {
    margin-bottom: 40px;
}

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

.task-demo-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
}

.task-demo-header .task-icon {
    margin: 0;
    width: 40px;
    height: 40px;
    font-size: 1rem;
}

.task-demo-header .task-title {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.task-demo-header h4 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
}

.task-instruction {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-style: italic;
}

.task-demo-videos {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
}

.task-demo-videos .video-card {
    flex: 1;
    min-width: 240px;
    max-width: 320px;
}

/* Ablation Table */
.ablation-table-wrapper {
    background: white;
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

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

.ablation-table th,
.ablation-table td {
    padding: 16px 24px;
    text-align: left;
}

.ablation-table th {
    background: var(--bg-secondary);
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.ablation-table td {
    font-size: 0.9375rem;
    border-bottom: 1px solid var(--border);
}

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

.ablation-table tr:hover td {
    background: var(--bg-secondary);
}

.ablation-table .best {
    background: linear-gradient(90deg, rgba(37, 99, 235, 0.05), transparent);
}

.ablation-table .best td {
    color: var(--primary);
}

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

.paper-content {
    display: flex;
    justify-content: center;
    align-items: center;
}

.paper-info {
    width: 100%;
    max-width: 800px;
}

.paper-info h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 20px;
    text-align: center;
}

.citation-box {
    position: relative;
    background: #1f2937;
    border-radius: var(--radius);
    padding: 20px;
}

.citation-box pre {
    font-family: 'JetBrains Mono', 'Fira Code', monospace;
    font-size: 0.8125rem;
    line-height: 1.6;
    color: #e5e7eb;
    white-space: pre-wrap;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.citation-box code {
    font-family: inherit;
}

.copy-btn {
    position: absolute;
    top: 12px;
    right: 12px;
    padding: 8px 16px;
    background: rgba(255, 255, 255, 0.1);
    border: none;
    border-radius: var(--radius-sm);
    color: white;
    font-size: 0.8125rem;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 6px;
}

.copy-btn:hover {
    background: rgba(255, 255, 255, 0.2);
}



/* ========================================
   Footer
   ======================================== */
.footer {
    background: #1f2937;
    color: white;
    padding: 48px 0;
}

.footer-content {
    text-align: center;
}

.footer-logo {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 20px;
    background: linear-gradient(135deg, var(--primary-light), var(--accent-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.footer-links a {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    font-size: 1.125rem;
    transition: var(--transition);
}

.footer-links a:hover {
    background: var(--primary);
    transform: translateY(-2px);
}

.footer-text {
    font-size: 0.9375rem;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 8px;
}

.footer-copy {
    font-size: 0.8125rem;
    color: rgba(255, 255, 255, 0.5);
}

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 1024px) {
    .result-content,
    .real-world-content {
        grid-template-columns: 1fr;
    }

    .rw-chart-item {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .rw-task-name {
        width: 100%;
    }
    
    .rw-bars {
        width: 100%;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .hero {
        padding: 100px 20px 60px;
    }
    
    .hero-stats {
        gap: 24px;
    }
    
    .abstract-card {
        padding: 24px;
    }
    
    .step {
        flex-direction: column;
        gap: 12px;
    }
    
    .breakdown-item {
        grid-template-columns: 60px 1fr 50px;
    }
    
    .calvin-breakdown {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .section {
        padding: 60px 0;
    }
    
    .videos-grid {
        grid-template-columns: 1fr;
    }
    
    .task-demo-videos {
        flex-direction: column;
    }
    
    .task-demo-videos .video-card {
        max-width: 100%;
    }
}

@media (max-width: 480px) {
    .author-list {
        font-size: 0.8125rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 280px;
        justify-content: center;
    }
    
    .dropdown-toggle {
        width: 100%;
        max-width: 280px;
        justify-content: center;
    }
    
    .serial-work-wrapper {
        width: 100%;
        max-width: 280px;
    }
    
    #serial-work-menu {
        left: 50% !important;
        right: auto !important;
        margin-top: 4px;
        transform: translateX(-50%) translateY(-5px);
        min-width: 200px;
    }
    
    .serial-work-wrapper:hover #serial-work-menu {
        transform: translateX(-50%) translateY(0);
    }
    
    .calvin-breakdown {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .ablation-table th,
    .ablation-table td {
        padding: 12px 16px;
    }
    
    .rw-legend {
        flex-direction: column;
        gap: 12px;
        align-items: center;
    }
}

/* ========================================
   Animations
   ======================================== */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Smooth scrolling for anchor links */
html {
    scroll-padding-top: 80px;
}