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

:root {
    /* Colors */
    --primary-blue: #0ea5e9;
    --primary-indigo: #4f46e5;
    --dark-gray: #1f2937;
    --medium-gray: #6b7280;
    --light-gray: #f3f4f6;
    --white: #ffffff;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1);

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    /* Spacing */
    --section-padding: 80px;
    --container-max-width: 1200px;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

body {
    font-family: var(--font-sans);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--dark-gray);
    background-color: var(--white);
    overflow-x: hidden;
}

.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 2rem;
}

/* ============================================
   Navigation
   ============================================ */
#navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: transparent;
    backdrop-filter: blur(10px);
    transition: all var(--transition-normal);
    z-index: 1000;
    padding: 1.5rem 0;
}

#navbar.scrolled {
    background: rgba(255, 255, 255, 0.95);
    box-shadow: var(--shadow-md);
    padding: 1rem 0;
}

.nav-container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo h1 {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-indigo));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-link {
    color: var(--dark-gray);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: color var(--transition-fast);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-blue), var(--primary-indigo));
    transition: width var(--transition-normal);
}

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

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

.nav-link.active {
    color: var(--primary-blue);
}

/* ============================================
   Mobile Menu
   ============================================ */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    z-index: 1001;
}

.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--dark-gray);
    border-radius: 2px;
    transition: all var(--transition-normal);
}

.mobile-menu-btn.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-btn.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-btn.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ============================================
   Hero Section
   ============================================ */
#hero {
    padding-top: 140px;
    padding-bottom: 60px;
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    text-align: center;
}

.title {
    font-size: 3rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    color: var(--dark-gray);
    animation: fadeInUp 0.8s ease;
}

.authors {
    margin-bottom: 2rem;
    animation: fadeInUp 0.8s ease 0.2s both;
}

.author-text {
    font-size: 1.1rem;
    color: var(--medium-gray);
    margin-bottom: 0.5rem;
}

.submission-id {
    font-size: 0.95rem;
    color: var(--medium-gray);
    font-style: italic;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 0.8s ease 0.4s both;
}

/* ============================================
   Buttons
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 500;
    text-decoration: none;
    border-radius: 0.5rem;
    transition: all var(--transition-normal);
    cursor: pointer;
    border: none;
}

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

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

.btn-secondary {
    background: var(--white);
    color: var(--primary-blue);
    border: 2px solid var(--primary-blue);
}

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

.btn.disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}

/* ============================================
   Teaser Section
   ============================================ */
#teaser {
    padding: var(--section-padding) 0;
    background: var(--white);
}

.teaser-image {
    text-align: center;
}

.teaser-image img {
    width: 100%;
    max-width: 1000px;
    height: auto;
    border-radius: 1rem;
    box-shadow: var(--shadow-xl);
    transition: transform var(--transition-normal);
}

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

.caption {
    margin-top: 1.5rem;
    font-size: 0.95rem;
    color: var(--medium-gray);
    font-style: italic;
}

/* ============================================
   Sections
   ============================================ */
section {
    padding: var(--section-padding) 0;
}

section:nth-child(even) {
    background: var(--light-gray);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 3rem;
    color: var(--dark-gray);
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-blue), var(--primary-indigo));
    margin: 1rem auto 0;
    border-radius: 2px;
}

.subsection-title {
    font-size: 1.75rem;
    font-weight: 600;
    margin-bottom: 2rem;
    color: var(--dark-gray);
}

.subsection {
    margin-bottom: 4rem;
}

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

/* ============================================
   Visualization Section
   ============================================ */
#viz {
    background: var(--light-gray);
}

.viz-description {
    text-align: center;
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--medium-gray);
    max-width: 800px;
    margin: 0 auto 2.5rem;
}

.video-container {
    max-width: 960px;
    margin: 0 auto;
    border-radius: 1rem;
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    background: #000;
}

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

.viz-links {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 2rem;
}

/* ============================================
   Abstract Section
   ============================================ */
#abstract {
    background: var(--white);
}

.abstract-content p {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 1.5rem;
    color: var(--dark-gray);
}

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

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

/* ============================================
   Features Section
   ============================================ */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: var(--white);
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: var(--shadow-md);
    text-align: center;
    transition: all var(--transition-normal);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.feature-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--dark-gray);
}

.feature-card p {
    font-size: 1rem;
    line-height: 1.6;
    color: var(--medium-gray);
}

/* ============================================
   Dataset Statistics
   ============================================ */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.stat-card {
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-indigo));
    padding: 2rem;
    border-radius: 1rem;
    text-align: center;
    color: var(--white);
    box-shadow: var(--shadow-lg);
    transition: transform var(--transition-normal);
}

.stat-card:hover {
    transform: scale(1.05);
}

.stat-number {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 1rem;
    font-weight: 500;
    opacity: 0.9;
}

/* ============================================
   Comparison Table
   ============================================ */
.table-wrapper {
    overflow-x: auto;
    margin-bottom: 2rem;
    border-radius: 0.5rem;
    box-shadow: var(--shadow-md);
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--white);
}

.comparison-table th,
.comparison-table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--light-gray);
}

.comparison-table thead {
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-indigo));
    color: var(--white);
}

.comparison-table th {
    font-weight: 600;
    font-size: 0.9rem;
}

.comparison-table tbody tr:hover {
    background: var(--light-gray);
    transition: background var(--transition-fast);
}

.comparison-table .highlight-row {
    background: #e0f2fe;
}

.comparison-table .highlight-row:hover {
    background: #bae6fd;
}

/* ============================================
   Pipeline Steps
   ============================================ */
.pipeline-content p {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 2rem;
    color: var(--dark-gray);
}

.pipeline-steps {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.pipeline-step {
    display: flex;
    gap: 1.5rem;
    align-items: flex-start;
}

.step-number {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-indigo));
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
}

.step-content h4 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--dark-gray);
}

.step-content p {
    font-size: 1rem;
    line-height: 1.6;
    color: var(--medium-gray);
}

/* ============================================
   Scene Types
   ============================================ */
.scene-types-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.scene-type-card {
    background: var(--white);
    padding: 1.5rem;
    border-radius: 0.75rem;
    border-left: 4px solid var(--primary-blue);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
}

.scene-type-card:hover {
    transform: translateX(5px);
    box-shadow: var(--shadow-md);
    border-left-color: var(--primary-indigo);
}

.scene-type-card h4 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--dark-gray);
}

.scene-type-card p {
    font-size: 0.95rem;
    line-height: 1.5;
    color: var(--medium-gray);
}

/* ============================================
   Benchmark Section
   ============================================ */
.benchmark-metrics ul {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1rem;
    margin-top: 1rem;
}

.benchmark-metrics li {
    padding: 1rem;
    background: var(--white);
    border-radius: 0.5rem;
    border-left: 3px solid var(--primary-blue);
    font-size: 0.95rem;
    line-height: 1.6;
}

.benchmark-metrics strong {
    color: var(--primary-indigo);
}

.subsets-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-top: 1rem;
}

.subset-badge {
    padding: 0.5rem 1rem;
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-indigo));
    color: var(--white);
    border-radius: 2rem;
    font-size: 0.9rem;
    font-weight: 500;
    box-shadow: var(--shadow-sm);
}

.table-note {
    font-size: 0.95rem;
    color: var(--medium-gray);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

/* ============================================
   Source Data Table (Table 3)
   ============================================ */
.source-data-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--white);
    font-size: 0.95rem;
}

.source-data-table th,
.source-data-table td {
    padding: 0.75rem 1rem;
    text-align: center;
    border-bottom: 1px solid #e5e7eb;
}

.source-data-table thead {
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-indigo));
    color: var(--white);
}

.source-data-table th {
    font-weight: 600;
    font-size: 0.9rem;
    padding: 0.85rem 1rem;
}

.source-data-table tbody tr:hover {
    background: var(--light-gray);
    transition: background var(--transition-fast);
}

.source-data-table .category-cell {
    text-align: left;
    font-weight: 600;
    color: var(--dark-gray);
    background: #f8fafc;
    border-right: 2px solid #e5e7eb;
}

.source-data-table .rawdata-cell {
    text-align: left;
    font-weight: 500;
    color: var(--dark-gray);
}

.sym-check {
    color: #22c55e;
    font-weight: 700;
    font-size: 1.1em;
}

.sym-cross {
    color: #ef4444;
    font-weight: 700;
    font-size: 1.1em;
}

.sym-new {
    color: #f59e0b;
    font-weight: 700;
    font-size: 1.1em;
}

.benchmark-table-scroll {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.benchmark-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--white);
    font-size: 0.85rem;
    white-space: nowrap;
}

.benchmark-table th,
.benchmark-table td {
    padding: 0.6rem 0.5rem;
    text-align: center;
    border-bottom: 1px solid #e5e7eb;
}

.benchmark-table thead tr:first-child th {
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-indigo));
    color: var(--white);
    font-weight: 600;
    padding: 0.75rem 0.5rem;
    border-bottom: none;
}

.benchmark-table thead tr:nth-child(2) th {
    background: #e0f2fe;
    color: var(--dark-gray);
    font-weight: 600;
    font-size: 0.8rem;
    padding: 0.5rem 0.4rem;
}

.benchmark-table td:first-child {
    text-align: left;
    font-weight: 500;
    padding-left: 0.75rem;
    padding-right: 1rem;
    position: sticky;
    left: 0;
    background: var(--white);
    z-index: 1;
}

.benchmark-table .highlight-row td:first-child {
    background: #e0f2fe;
}

.benchmark-table tbody tr:hover {
    background: var(--light-gray);
}

.benchmark-table .highlight-row {
    background: #e0f2fe;
}

.benchmark-table .highlight-row:hover {
    background: #bae6fd;
}

.realistic-table {
    max-width: 800px;
    margin: 0 auto;
}

.realistic-table td:first-child {
    min-width: 180px;
}

/* ============================================
   Findings
   ============================================ */
.findings-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.finding-card {
    background: var(--white);
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
}

.finding-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.finding-card h4 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--dark-gray);
}

.finding-card p {
    font-size: 1rem;
    line-height: 1.6;
    color: var(--medium-gray);
}

/* ============================================
   Downloads Section
   ============================================ */
.downloads-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.download-card {
    background: var(--white);
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: var(--shadow-md);
    text-align: center;
    transition: all var(--transition-normal);
}

.download-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.download-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.download-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--dark-gray);
}

.download-card p {
    font-size: 1rem;
    line-height: 1.6;
    color: var(--medium-gray);
    margin-bottom: 1.5rem;
}

/* ============================================
   Citation Section
   ============================================ */
.citation-box {
    background: var(--dark-gray);
    color: var(--light-gray);
    padding: 2rem;
    border-radius: 1rem;
    position: relative;
    box-shadow: var(--shadow-lg);
}

.citation-box pre {
    margin: 0;
    overflow-x: auto;
}

.citation-box code {
    font-family: 'Courier New', monospace;
    font-size: 0.95rem;
    line-height: 1.8;
}

.copy-btn {
    position: absolute;
    top: 1rem;
    right: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--primary-blue);
    color: var(--white);
    border: none;
    border-radius: 0.5rem;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all var(--transition-fast);
}

.copy-btn:hover {
    background: var(--primary-indigo);
    transform: scale(1.05);
}

/* ============================================
   Footer
   ============================================ */
footer {
    background: var(--dark-gray);
    color: var(--light-gray);
    padding: 2rem 0;
    text-align: center;
}

footer p {
    margin-bottom: 0.5rem;
}

.footer-note {
    font-size: 0.9rem;
    opacity: 0.8;
    font-style: italic;
}

.footer-acknowledgement {
    font-size: 0.85rem;
    opacity: 0.7;
    margin-top: 0.5rem;
}

.footer-acknowledgement a {
    color: var(--primary-blue);
    text-decoration: none;
}

.footer-acknowledgement a:hover {
    text-decoration: underline;
}

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

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

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

/* Tablets */
@media (max-width: 1024px) {
    :root {
        --section-padding: 60px;
    }

    .title {
        font-size: 2.5rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .nav-links {
        gap: 1.5rem;
    }
}

/* Mobile */
@media (max-width: 768px) {
    :root {
        --section-padding: 40px;
    }

    .container {
        padding: 0 1.5rem;
    }

    .title {
        font-size: 2rem;
    }

    .section-title {
        font-size: 1.75rem;
    }

    .nav-container {
        flex-direction: row;
        flex-wrap: wrap;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .nav-links {
        display: none;
        width: 100%;
        flex-direction: column;
        gap: 0;
        background: var(--white);
        border-radius: 0.5rem;
        margin-top: 1rem;
        box-shadow: var(--shadow-md);
        overflow: hidden;
    }

    .nav-links.active {
        display: flex;
    }

    .nav-link {
        font-size: 0.95rem;
        padding: 0.75rem 1rem;
        border-bottom: 1px solid var(--light-gray);
    }

    .nav-link:last-child {
        border-bottom: none;
    }

    .nav-link::after {
        display: none;
    }

    #hero {
        padding-top: 120px;
    }

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

    .features-grid,
    .stats-grid,
    .scene-types-grid,
    .findings-grid,
    .downloads-grid {
        grid-template-columns: 1fr;
    }

    .pipeline-step {
        flex-direction: column;
    }

    .table-wrapper {
        font-size: 0.85rem;
    }

    .comparison-table th,
    .comparison-table td {
        padding: 0.75rem 0.5rem;
    }

    .citation-box {
        padding: 1.5rem;
    }

    .citation-box code {
        font-size: 0.85rem;
    }

    .copy-btn {
        position: static;
        margin-top: 1rem;
        width: 100%;
        justify-content: center;
    }

    .benchmark-table {
        font-size: 0.75rem;
    }

    .benchmark-table th,
    .benchmark-table td {
        padding: 0.4rem 0.3rem;
    }
}

/* Small Mobile */
@media (max-width: 480px) {
    .title {
        font-size: 1.5rem;
    }

    .section-title {
        font-size: 1.5rem;
    }

    .stat-number {
        font-size: 2rem;
    }

    .feature-icon,
    .download-icon {
        font-size: 2rem;
    }
}

/* ============================================
   Utility Classes
   ============================================ */
.text-center {
    text-align: center;
}

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

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

/* ============================================
   Authors Section (New Styles)
   ============================================ */
.authors-list {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.5rem 0.25rem;
    margin-bottom: 1.5rem;
    font-size: 1rem;
    line-height: 1.8;
}

.authors-list .author {
    white-space: nowrap;
}

.authors-list .author a {
    color: var(--dark-gray);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--transition-fast);
}

.authors-list .author a:hover {
    color: var(--primary-blue);
}

.authors-list .author sup {
    font-size: 0.7em;
    color: var(--primary-indigo);
    margin-left: 0.1rem;
}

.affiliations {
    text-align: center;
    margin-bottom: 2rem;
}

.affiliations .affil {
    font-size: 0.9rem;
    color: var(--medium-gray);
    margin-bottom: 0.25rem;
}

.affiliations .affil sup {
    font-size: 0.75em;
    color: var(--primary-indigo);
}

.affiliations .corresponding {
    font-size: 0.85rem;
    color: var(--primary-blue);
    margin-top: 0.75rem;
    font-style: italic;
}

/* ============================================
   Interactive Visualization Section (New Styles)
   ============================================ */
.viz-section {
    margin-bottom: 3rem;
}

.viz-section:last-child {
    margin-bottom: 0;
}

.viz-section-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--primary-dark);
    margin-bottom: 0.5rem;
    text-align: left;
}

.viz-description {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    text-align: left;
}

.viz-video-container {
    background: var(--dark-gray);
    border-radius: 1rem;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    max-width: 100%;
    margin: 0 auto;
}

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

.triple-compare {
    --split1: 33%;
    --split2: 66%;
    position: relative;
    width: 100%;
    background: #0b0f1a;
    border-radius: 1rem;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.tc-base-video {
    width: 100%;
    height: auto;
    display: block;
    pointer-events: none;
}

.compare-carousel {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.compare-item {
    display: none;
}

.compare-item.is-active {
    display: block;
}

.compare-dots {
    display: flex;
    justify-content: center;
    gap: 0.6rem;
    padding: 0.25rem 0 0.5rem;
}

.compare-dot {
    width: 10px;
    height: 10px;
    border-radius: 999px;
    border: 0;
    background: rgba(255, 255, 255, 0.4);
    cursor: pointer;
    transition: transform var(--transition-fast), background var(--transition-fast);
}

.compare-dot.is-active {
    background: var(--white);
    transform: scale(1.2);
}

.compare-dot:focus-visible {
    outline: 2px solid var(--primary-blue);
    outline-offset: 4px;
}

.tc-layer {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.triple-compare .tc-overlay-video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.tc-depth {
    clip-path: inset(0 calc(100% - var(--split2)) 0 var(--split1));
}

.tc-normal {
    clip-path: inset(0 0 0 var(--split2));
}

.tc-label {
    position: absolute;
    top: 12px;
    padding: 4px 10px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--white);
    background: rgba(0, 0, 0, 0.55);
    border-radius: 999px;
    z-index: 6;
    pointer-events: none;
}

.tc-label-rgb {
    left: 12px;
}

.tc-label-depth {
    left: calc(var(--split1) + 12px);
}

.tc-label-normal {
    left: calc(var(--split2) + 12px);
}

.tc-divider {
    position: absolute;
    top: 0;
    bottom: 0;
    width: 2px;
    background: rgba(255, 255, 255, 0.85);
    box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.35);
    z-index: 7;
    transform: translateX(-1px);
    touch-action: none;
    cursor: ew-resize;
}

.tc-divider-1 {
    left: var(--split1);
}

.tc-divider-2 {
    left: var(--split2);
}

.tc-handle {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 22px;
    height: 22px;
    transform: translate(-50%, -50%);
    border-radius: 50%;
    background: var(--white);
    border: 2px solid #111827;
    box-shadow: var(--shadow-md);
    cursor: ew-resize;
    touch-action: none;
}

.tc-handle:focus-visible {
    outline: 2px solid var(--primary-blue);
    outline-offset: 4px;
}

@media (max-width: 768px) {
    .tc-label {
        font-size: 0.65rem;
        top: 10px;
    }
    .tc-handle {
        width: 18px;
        height: 18px;
    }
}

.pointcloud-card {
    background: var(--white);
    border-radius: 1rem;
    box-shadow: var(--shadow-lg);
    padding: 1rem;
}

.frame-controls {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
    flex-wrap: wrap;
}

.frame-btn {
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 999px;
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-indigo));
    color: var(--white);
    font-weight: 600;
    cursor: pointer;
    box-shadow: var(--shadow-sm);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.frame-btn:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.frame-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
    box-shadow: var(--shadow-sm);
}

.frame-btn.active {
    background: var(--primary-indigo);
    color: var(--white);
}

.frame-label {
    text-align: center;
    padding: 0.45rem 0.9rem;
    background: #eef6ff;
    border-radius: 0.75rem;
    font-weight: 600;
    color: #1e3a8a;
    min-height: 24px;
}

.frame-modes {
    display: flex;
    justify-content: center;
    gap: 0.6rem;
    margin-bottom: 0.75rem;
    flex-wrap: wrap;
}

.mode-btn {
    padding: 0.4rem 0.9rem;
    border-radius: 999px;
    border: 1px solid #c7ddff;
    background: #f8fbff;
    color: #1e3a8a;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.mode-btn.active {
    background: #1e3a8a;
    color: #ffffff;
    border-color: #1e3a8a;
}

.pointcloud-wrapper {
    width: 100%;
    aspect-ratio: 1.4 / 1;
    background: #f8fafc;
    border-radius: 0.9rem;
    overflow: hidden;
}

.pointcloud-wrapper canvas {
    width: 100%;
    height: 100%;
    display: block;
}

canvas.babylon-model-viewer {
    outline: none;
    touch-action: none;
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
}

.viz-container {
    position: relative;
    background: var(--white);
    border-radius: 1rem;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    min-height: 500px;
    max-width: 100%;
    margin: 0 auto;
}

.viz-container iframe {
    width: 100%;
    height: 100%;
    min-height: 500px;
    border: none;
    display: block;
}

.viz-loading {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: var(--light-gray);
    z-index: 10;
    transition: opacity 0.5s ease;
}

.viz-loading p {
    margin: 0;
    color: #6b7280;
    font-size: 0.95rem;
}

.viz-loading.idle .viz-spinner {
    display: none;
}

.viz-loading.hidden {
    opacity: 0;
    pointer-events: none;
}

.viz-spinner {
    width: 40px;
    height: 40px;
    border: 4px solid rgba(79, 70, 229, 0.2);
    border-top-color: var(--primary-indigo);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 1rem;
}

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

/* ============================================
   Scene Thumbnail Bar
   ============================================ */
.scene-thumbnail-bar,
.viz-thumbnail-bar {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    padding: 1rem 0;
    margin-bottom: 1rem;
}

.scene-thumbnail-wrapper,
.viz-thumbnail-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
}

.viz-thumbnail-link {
    display: inline-block;
    text-decoration: none;
}

.scene-thumbnail-bar .scene-thumbnail,
.viz-thumbnail-bar .viz-thumbnail {
    width: 120px !important;
    height: 75px !important;
    object-fit: cover !important;
    border-radius: 0.5rem;
    cursor: pointer;
    transition: all 0.25s ease;
    border: 3px solid transparent;
    box-shadow: var(--shadow-md);
}

.scene-thumbnail-bar .scene-thumbnail:hover,
.viz-thumbnail-bar .viz-thumbnail:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(79, 70, 229, 0.3);
}

.scene-thumbnail-bar .scene-thumbnail.active,
.viz-thumbnail-bar .viz-thumbnail.active {
    border-color: var(--primary-indigo);
    box-shadow: 0 4px 16px rgba(79, 70, 229, 0.3);
    transform: translateY(-2px);
}

.viz-thumbnail-wrapper.active .viz-thumbnail {
    border-color: var(--primary-indigo);
    box-shadow: 0 4px 16px rgba(79, 70, 229, 0.3);
    transform: translateY(-2px);
}

.viz-thumbnail-wrapper:focus-within .viz-thumbnail {
    border-color: var(--primary-indigo);
    box-shadow: 0 4px 16px rgba(79, 70, 229, 0.3);
    transform: translateY(-2px);
}

.scene-thumbnail-label,
.viz-thumbnail-label {
    font-size: 0.85rem;
    color: var(--medium-gray);
    font-weight: 500;
    text-align: center;
}

@media (max-width: 768px) {
    .scene-thumbnail-bar,
    .viz-thumbnail-bar {
        gap: 1rem;
    }
    
    .scene-thumbnail-bar .scene-thumbnail,
    .viz-thumbnail-bar .viz-thumbnail {
        width: 90px !important;
        height: 56px !important;
    }
    
    .scene-thumbnail-label,
    .viz-thumbnail-label {
        font-size: 0.75rem;
    }
}

/* ============================================
   Image Styles (New)
   ============================================ */
.chart-container {
    text-align: center;
    margin-bottom: 2rem;
}

.chart-image {
    width: 100%;
    max-width: 100%;
    height: auto;
    border-radius: 0.75rem;
    box-shadow: var(--shadow-md);
    margin: 0 auto;
    display: block;
}

.pipeline-image {
    text-align: center;
    margin-bottom: 2rem;
    width: 100%;
}

.pipeline-image img {
    width: 100% !important;
    max-width: none !important;
    height: auto;
    border-radius: 0.75rem;
    box-shadow: var(--shadow-md);
    margin: 0 auto;
    display: block;
}


.image-caption {
    margin-top: 1rem;
    font-size: 0.9rem;
    color: var(--medium-gray);
    font-style: italic;
    text-align: center;
}

/* ============================================
   Responsive Updates for New Sections
   ============================================ */
@media (max-width: 900px) {
    .viz-container {
        min-height: 400px;
    }

    .viz-container iframe {
        min-height: 400px;
    }

    .viz-section-title {
        font-size: 1.3rem;
    }
}

@media (max-width: 768px) {
    .authors-list {
        font-size: 0.9rem;
    }

    .affiliations .affil {
        font-size: 0.8rem;
    }

    .viz-container {
        min-height: 300px;
    }

    .viz-container iframe {
        min-height: 300px;
    }

    .viz-section-title {
        font-size: 1.2rem;
    }

    .viz-description {
        font-size: 0.9rem;
    }

    .viz-section {
        margin-bottom: 2rem;
    }
}

@media (max-width: 480px) {
    .authors-list {
        font-size: 0.85rem;
    }

    .viz-section {
        margin-bottom: 1.5rem;
    }

    .viz-section-title {
        font-size: 1.1rem;
    }
}