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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #ffffff;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header Styles */
.header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 2rem 0;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

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

.logo {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    letter-spacing: -0.02em;
}

.tagline {
    font-size: 1.2rem;
    opacity: 0.9;
    font-weight: 300;
}

.nav-list {
    display: flex;
    justify-content: center;
    list-style: none;
    gap: 2rem;
    flex-wrap: wrap;
}

.nav-list a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 25px;
    transition: all 0.3s ease;
}

.nav-list a:hover {
    background-color: rgba(255,255,255,0.2);
    transform: translateY(-2px);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    padding: 6rem 0;
    text-align: center;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: #2d3748;
    line-height: 1.2;
}

.hero-description {
    font-size: 1.3rem;
    color: #4a5568;
    max-width: 800px;
    margin: 0 auto 3rem;
    line-height: 1.6;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-block;
    padding: 1rem 2rem;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    font-size: 1.1rem;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(102, 126, 234, 0.4);
}

.btn-secondary {
    background: white;
    color: #667eea;
    border: 2px solid #667eea;
}

.btn-secondary:hover {
    background: #667eea;
    color: white;
    transform: translateY(-3px);
}

/* Section Styles */
.section-title {
    font-size: 2.5rem;
    font-weight: 600;
    text-align: center;
    margin-bottom: 3rem;
    color: #2d3748;
}

.section-description {
    text-align: center;
    font-size: 1.2rem;
    color: #4a5568;
    max-width: 600px;
    margin: 0 auto 3rem;
}

/* About Section */
.about {
    padding: 6rem 0;
    background: white;
}

.about-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-text p {
    font-size: 1.1rem;
    color: #4a5568;
    margin-bottom: 1.5rem;
}

.about-stats {
    display: grid;
    gap: 2rem;
}

.stat {
    text-align: center;
    padding: 2rem;
    background: linear-gradient(135deg, #f7fafc 0%, #edf2f7 100%);
    border-radius: 15px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
}

.stat-number {
    display: block;
    font-size: 3rem;
    font-weight: 700;
    color: #667eea;
    margin-bottom: 0.5rem;
}

.stat-label {
    color: #4a5568;
    font-weight: 500;
}

/* AAAI 2026 Lab Section */
.aaai2026 {
    padding: 6rem 0;
    background: white;
}

.aaai2026-header {
    text-align: center;
    margin-bottom: 3rem;
}

.aaai2026-meta {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 2rem;
}

.aaai2026-meta-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.1rem;
    color: #4a5568;
}

.aaai2026-meta-item strong {
    color: #2d3748;
}

.aaai2026-links {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.aaai2026-link {
    color: #667eea;
    text-decoration: none;
    padding: 0.5rem 1rem;
    border: 1px solid #667eea;
    border-radius: 20px;
    font-weight: 500;
    transition: all 0.3s ease;
}

.aaai2026-link:hover {
    background: #667eea;
    color: white;
}

.aaai2026-organizers {
    font-size: 0.95rem;
    color: #4a5568;
    max-width: 900px;
    margin: 0 auto 3rem;
    text-align: center;
    line-height: 2.2;
}

/* Researcher Links */
.researcher-link {
    color: #667eea;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s ease;
}

.researcher-link:hover {
    color: #764ba2;
    text-decoration: underline;
}

.scholar-icon {
    display: inline-block;
    width: 16px;
    height: 16px;
    margin-left: 4px;
    vertical-align: middle;
    opacity: 0.7;
    transition: opacity 0.2s ease;
}

.scholar-icon:hover {
    opacity: 1;
}

/* Ensure scholar icon link stays visible after click/visited */
a[title="Google Scholar"] {
    display: inline;
}

a[title="Google Scholar"]:visited .scholar-icon,
a[title="Google Scholar"]:active .scholar-icon {
    display: inline-block;
    opacity: 0.7;
}

.speaker-link {
    color: #4a5568;
    text-decoration: none;
    border-bottom: 1px dotted #667eea;
    transition: all 0.2s ease;
}

.speaker-link:hover {
    color: #667eea;
    border-bottom-style: solid;
}

/* Program Schedule Table */
.program-section {
    margin-bottom: 3rem;
}

.program-section-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: #2d3748;
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid #667eea;
}

.program-table {
    width: 100%;
    border-collapse: collapse;
    background: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0,0,0,0.08);
}

.program-table th {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 1rem;
    text-align: left;
    font-weight: 600;
}

.program-table td {
    padding: 1rem;
    border-bottom: 1px solid #e2e8f0;
    vertical-align: top;
}

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

.program-table tr:hover:not(.program-break) {
    background-color: #f7fafc;
}

.program-break {
    background: linear-gradient(135deg, #f7fafc 0%, #edf2f7 100%);
}

.program-break td {
    text-align: center;
    font-weight: 600;
    color: #667eea;
    padding: 1.5rem;
}

.program-time {
    font-weight: 500;
    color: #667eea;
    white-space: nowrap;
}

.program-topic {
    font-weight: 500;
    color: #2d3748;
}

.program-topic-desc {
    font-size: 0.9rem;
    color: #718096;
    margin-top: 0.25rem;
}

.program-speaker {
    color: #4a5568;
}

.program-resources {
    min-width: 100px;
}

.colab-link {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.25rem 0.75rem;
    background: #f7fafc;
    color: #667eea;
    text-decoration: none;
    border-radius: 15px;
    font-size: 0.85rem;
    font-weight: 500;
    transition: all 0.3s ease;
}

.colab-link:hover {
    background: #667eea;
    color: white;
}

/* Responsive Table */
@media (max-width: 768px) {
    .program-table {
        font-size: 0.9rem;
    }

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

    .program-table th:nth-child(4),
    .program-table td:nth-child(4) {
        display: none;
    }

    .aaai2026-meta {
        flex-direction: column;
        align-items: center;
        gap: 0.75rem;
    }
}

@media (max-width: 480px) {
    .program-table {
        display: block;
        overflow-x: auto;
    }

    .program-section-title {
        font-size: 1.25rem;
    }
}

/* VNN-COMP 2026 Section */
.vnncomp2026 {
    padding: 6rem 0;
    background: linear-gradient(135deg, #f7fafc 0%, #edf2f7 100%);
}

.vnncomp2026-header {
    text-align: center;
    margin-bottom: 3rem;
}

.vnncomp2026-meta {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 1.5rem;
}

.vnncomp2026-meta-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.1rem;
    color: #4a5568;
}

.vnncomp2026-meta-item strong {
    color: #2d3748;
}

.vnncomp2026-links {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.vnncomp2026-link {
    color: #667eea;
    text-decoration: none;
    padding: 0.5rem 1rem;
    border: 1px solid #667eea;
    border-radius: 20px;
    font-weight: 500;
    transition: all 0.3s ease;
}

.vnncomp2026-link:hover {
    background: #667eea;
    color: white;
}

.vnncomp2026-section {
    margin-bottom: 3rem;
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.08);
}

.vnncomp2026-section-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: #2d3748;
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid #667eea;
}

/* News Timeline */
.news-timeline {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.news-item {
    display: flex;
    gap: 1.5rem;
    align-items: flex-start;
    padding: 1rem;
    background: #f7fafc;
    border-radius: 10px;
    border-left: 4px solid #667eea;
}

.news-date {
    font-weight: 600;
    color: #667eea;
    white-space: nowrap;
    min-width: 120px;
}

.news-text {
    color: #4a5568;
}

/* Dates Grid */
.dates-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
}

.date-item {
    display: flex;
    flex-direction: column;
    padding: 1.25rem;
    background: #f7fafc;
    border-radius: 10px;
    border-left: 4px solid #cbd5e0;
}

.date-item.highlight {
    border-left-color: #667eea;
    background: linear-gradient(135deg, #667eea15 0%, #764ba215 100%);
}

.date-label {
    font-weight: 600;
    color: #2d3748;
    margin-bottom: 0.5rem;
}

.date-value {
    color: #4a5568;
}

.date-item.highlight .date-value {
    color: #667eea;
    font-weight: 600;
}

/* Participation Grid */
.participation-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.participation-card {
    padding: 1.5rem;
    background: #f7fafc;
    border-radius: 10px;
    border-top: 4px solid #667eea;
}

.participation-card h4 {
    font-size: 1.2rem;
    color: #2d3748;
    margin-bottom: 0.75rem;
}

.participation-card p {
    color: #4a5568;
    margin-bottom: 1rem;
    font-size: 0.95rem;
}

.participation-card ul {
    list-style: none;
    padding: 0;
}

.participation-card li {
    padding: 0.35rem 0;
    color: #4a5568;
    font-size: 0.9rem;
}

.participation-card li::before {
    content: "• ";
    color: #667eea;
    font-weight: bold;
}

/* Committee Grid */
.committee-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.committee-role {
    padding: 1.25rem;
    background: #f7fafc;
    border-radius: 10px;
}

.committee-role h4 {
    font-size: 1rem;
    color: #667eea;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.committee-role p {
    color: #4a5568;
    font-size: 0.95rem;
    line-height: 1.6;
}

/* Resources Grid */
.resources-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1rem;
}

.resource-link {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 1.5rem 1rem;
    background: #f7fafc;
    border-radius: 10px;
    text-decoration: none;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.resource-link:hover {
    border-color: #667eea;
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.15);
}

.resource-icon {
    font-size: 2rem;
    margin-bottom: 0.75rem;
}

.resource-text {
    color: #4a5568;
    font-weight: 500;
    text-align: center;
    font-size: 0.95rem;
}

.resource-link:hover .resource-text {
    color: #667eea;
}

.section-text {
    color: #4a5568;
    font-size: 1.05rem;
    line-height: 1.7;
}

/* Responsive adjustments for VNN-COMP 2026 */
@media (max-width: 768px) {
    .vnncomp2026-meta {
        flex-direction: column;
        align-items: center;
        gap: 0.75rem;
    }

    .news-item {
        flex-direction: column;
        gap: 0.5rem;
    }

    .news-date {
        min-width: auto;
    }

    .dates-grid,
    .participation-grid,
    .committee-grid,
    .resources-grid {
        grid-template-columns: 1fr;
    }
}

/* Competitions Section */
.competitions {
    padding: 6rem 0;
    background: linear-gradient(135deg, #f7fafc 0%, #edf2f7 100%);
}

.timeline {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 3px;
    background: linear-gradient(to bottom, #667eea, #764ba2);
    transform: translateX(-50%);
}

.timeline-item {
    position: relative;
    margin: 3rem 0;
    display: flex;
    align-items: center;
}

.timeline-item:nth-child(odd) {
    flex-direction: row-reverse;
}

.timeline-marker {
    width: 20px;
    height: 20px;
    background: #667eea;
    border-radius: 50%;
    border: 4px solid white;
    box-shadow: 0 0 0 4px #667eea;
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
}

.timeline-content {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    width: 45%;
    position: relative;
}

.timeline-item:nth-child(odd) .timeline-content {
    margin-right: 55%;
}

.timeline-item:nth-child(even) .timeline-content {
    margin-left: 55%;
}

.timeline-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: #2d3748;
    margin-bottom: 1rem;
}

.timeline-description {
    color: #4a5568;
    margin-bottom: 1.5rem;
}

.timeline-links {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.timeline-link {
    color: #667eea;
    text-decoration: none;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border: 1px solid #667eea;
    border-radius: 20px;
    transition: all 0.3s ease;
    font-size: 0.9rem;
}

.timeline-link:hover {
    background: #667eea;
    color: white;
}

/* Repositories Section */
.repositories {
    padding: 6rem 0;
    background: white;
}

.repo-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.repo-card {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    text-align: center;
    transition: transform 0.3s ease;
}

.repo-card:hover {
    transform: translateY(-5px);
}

.repo-year {
    font-size: 2rem;
    font-weight: 700;
    color: #667eea;
    margin-bottom: 1.5rem;
}

.repo-links {
    display: grid;
    gap: 0.8rem;
}

.repo-link {
    color: #4a5568;
    text-decoration: none;
    padding: 0.8rem 1.5rem;
    background: #f7fafc;
    border-radius: 10px;
    transition: all 0.3s ease;
    font-weight: 500;
}

.repo-link:hover {
    background: #667eea;
    color: white;
    transform: translateX(5px);
}

.repo-note {
    background: #fff3cd;
    border: 1px solid #ffeaa7;
    border-radius: 10px;
    padding: 1.5rem;
    text-align: center;
    color: #856404;
}

/* Contact Section */
.contact {
    padding: 6rem 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.contact .section-title {
    color: white;
}

.contact-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 4rem;
    align-items: start;
}

.contact-info h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.contact-info p {
    margin-bottom: 2rem;
    opacity: 0.9;
}

.contact-list {
    list-style: none;
}

.contact-list li {
    padding: 0.5rem 0;
    opacity: 0.9;
}

.contact-list li::before {
    content: "✓ ";
    color: #a7f3d0;
    font-weight: bold;
}

.contact-links {
    display: grid;
    gap: 1rem;
}

.contact-btn {
    display: block;
    text-align: center;
    padding: 1rem 1.5rem;
    background: rgba(255,255,255,0.2);
    color: white;
    text-decoration: none;
    border-radius: 10px;
    font-weight: 500;
    transition: all 0.3s ease;
}

.contact-btn:hover {
    background: white;
    color: #667eea;
    transform: translateY(-2px);
}

/* Footer */
.footer {
    background: #2d3748;
    color: white;
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-info h3 {
    margin-bottom: 0.5rem;
    font-size: 1.3rem;
}

.footer-info p {
    opacity: 0.8;
}

.footer-links {
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.footer-links a {
    color: white;
    text-decoration: none;
    opacity: 0.8;
    transition: opacity 0.3s ease;
}

.footer-links a:hover {
    opacity: 1;
}

.footer-bottom {
    border-top: 1px solid #4a5568;
    padding-top: 1rem;
    text-align: center;
    opacity: 0.6;
}

/* Participants Section */
.participants {
    padding: 6rem 0;
    background: linear-gradient(135deg, #f7fafc 0%, #edf2f7 100%);
}

.participants-table-wrapper {
    overflow-x: auto;
    margin-top: 2rem;
}

.participants-table {
    width: 100%;
    border-collapse: collapse;
    background: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0,0,0,0.08);
}

.participants-table th {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 1rem;
    text-align: center;
    font-weight: 600;
    white-space: nowrap;
}

.participants-table th:first-child {
    text-align: left;
    min-width: 150px;
}

.participants-table td {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid #e2e8f0;
    text-align: center;
}

.participants-table td:first-child {
    text-align: left;
    font-weight: 500;
}

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

.participants-table tr:hover {
    background-color: #f7fafc;
}

.participants-table .tool-link {
    color: #667eea;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s ease;
}

.participants-table .tool-link:hover {
    color: #764ba2;
    text-decoration: underline;
}

.participants-table .checkmark {
    color: #667eea;
    font-weight: bold;
    font-size: 1.2rem;
}

.participants-table .no-participation {
    color: #cbd5e0;
}

/* Tools List Inline Expansion */
.tools-list {
    display: none;
    margin-top: 1rem;
    padding: 1rem;
    background: linear-gradient(135deg, #f7fafc 0%, #edf2f7 100%);
    border-radius: 10px;
    text-align: left;
}

.tools-list.expanded {
    display: block;
}

.tools-list-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 0.5rem;
}

.tools-list a {
    display: block;
    padding: 0.5rem 0.75rem;
    color: #4a5568;
    text-decoration: none;
    background: white;
    border-radius: 6px;
    font-size: 0.9rem;
    transition: all 0.2s ease;
    text-align: center;
}

.tools-list a:hover {
    background: #667eea;
    color: white;
}

.tools-list span.tool-no-link {
    display: block;
    padding: 0.5rem 0.75rem;
    color: #718096;
    background: white;
    border-radius: 6px;
    font-size: 0.9rem;
    text-align: center;
}

.tools-toggle {
    cursor: pointer;
}

.tools-toggle .toggle-icon {
    font-size: 0.75rem;
    transition: transform 0.2s ease;
    display: inline-block;
}

.tools-toggle.active .toggle-icon {
    transform: rotate(180deg);
}

/* Report Link Styling */
.repo-link.report-link {
    background: linear-gradient(135deg, #667eea15 0%, #764ba215 100%);
    border-left: 3px solid #667eea;
}

.repo-link.report-link:hover {
    background: #667eea;
    color: white;
    border-left: 3px solid #667eea;
}

/* Publications Section */
.publications-section {
    margin-top: 3rem;
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.08);
}

.publications-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: #2d3748;
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid #667eea;
}

.overview-paper {
    margin-bottom: 2rem;
    padding: 1.5rem;
    background: linear-gradient(135deg, #667eea10 0%, #764ba210 100%);
    border-radius: 10px;
    border-left: 4px solid #667eea;
}

.overview-paper h4 {
    font-size: 1.1rem;
    color: #667eea;
    margin-bottom: 0.75rem;
}

.paper-citation {
    color: #4a5568;
    line-height: 1.7;
}

.paper-citation a {
    color: #667eea;
    text-decoration: none;
    font-weight: 500;
}

.paper-citation a:hover {
    text-decoration: underline;
}

.bibtex-section h4 {
    font-size: 1.1rem;
    color: #2d3748;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.copy-bibtex-btn {
    padding: 0.4rem 0.8rem;
    background: #667eea;
    color: white;
    border: none;
    border-radius: 5px;
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.copy-bibtex-btn:hover {
    background: #764ba2;
    transform: translateY(-1px);
}

.copy-bibtex-btn.copied {
    background: #48bb78;
}

.bibtex-code {
    background: #2d3748;
    color: #e2e8f0;
    padding: 1.5rem;
    border-radius: 10px;
    overflow-x: auto;
    font-size: 0.85rem;
    line-height: 1.5;
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    max-height: 400px;
    overflow-y: auto;
}

/* Responsive Design */
@media (max-width: 768px) {
    .logo {
        font-size: 2.5rem;
    }
    
    .tagline {
        font-size: 1.1rem;
    }
    
    .nav-list {
        gap: 1rem;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-description {
        font-size: 1.1rem;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .timeline::before {
        left: 30px;
    }
    
    .timeline-item {
        flex-direction: column !important;
        align-items: flex-start;
    }
    
    .timeline-marker {
        left: 30px;
        transform: translateX(-50%);
    }
    
    .timeline-content {
        width: calc(100% - 80px);
        margin-left: 80px !important;
        margin-right: 0 !important;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-links {
        justify-content: center;
    }
    
    .repo-grid {
        grid-template-columns: 1fr;
    }

    .participants-table {
        font-size: 0.9rem;
    }

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

    .tools-list-grid {
        grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .hero {
        padding: 4rem 0;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .timeline-content {
        padding: 1.5rem;
    }
    
    .timeline-links {
        flex-direction: column;
        gap: 0.5rem;
    }
}