:root {
    --primary-color: #2563eb;
    --primary-light: #3b82f6;
    --text-primary: #1f2937;
    --text-secondary: #4b5563;
    --text-muted: #6b7280;
    --bg-primary: #ffffff;
    --bg-secondary: #fafafa;
    --border-color: #e5e7eb;
    --highlight-bg: #fef3c7;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --radius-sm: 4px;
    --radius-md: 8px;
    --transition: all 0.2s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Source Sans Pro', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: #e3ecf5;
    min-height: 100vh;
    color: var(--text-primary);
    line-height: 1.6;
}

.container {
    max-width: 860px;
    margin: 0 auto;
    padding: 40px 20px;
}

.profile-section {
    margin-bottom: 40px;
}

.profile-card {
    background: #d6e4f0;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    padding: 40px;
    text-align: center;
}

.avatar-container {
    margin-bottom: 20px;
}

.avatar {
    width: 140px;
    height: 140px;
    border-radius: 50%;
    object-fit: cover;
    background: var(--bg-secondary);
}

.name {
    font-size: 1.8rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.title {
    font-size: 0.95rem;
    color: var(--text-primary);
    font-weight: 600;
    margin-bottom: 4px;
}

.affiliation {
    font-size: 0.95rem;
    color: var(--text-primary);
    font-weight: 600;
    margin-bottom: 4px;
}

.location {
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-bottom: 4px;
}

.location i {
    margin-right: 4px;
}

.email {
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-bottom: 16px;
}

.email i {
    margin-right: 4px;
}

.bio {
    font-size: 1.0rem;
    color: var(--text-secondary);
    max-width: none;
    margin: 0 0 20px;
    line-height: 1.7;
    text-align: left;
}

.bio strong {
    color: var(--text-secondary);
    font-weight: normal;
}

.bio a {
    color: var(--primary-color);
    text-decoration: none;
}

.bio a strong {
    color: var(--primary-color);
}

.bio a:hover {
    text-decoration: underline;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 16px;
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: var(--bg-secondary);
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
    font-size: 1rem;
}

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

.section {
    background: #d6e4f0;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    padding: 30px;
    margin-bottom: 24px;
}

.section-title {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.pub-intro {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.pub-intro a {
    color: var(--primary-color);
    text-decoration: none;
}

.pub-intro a:hover {
    text-decoration: underline;
}

.publication-list {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.publication-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 16px 0;
    border-bottom: 1px solid var(--border-color);
}

.publication-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.publication-item:first-child {
    padding-top: 0;
}

.pub-number {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    min-width: 32px;
    flex-shrink: 0;
}

.pub-content {
    flex: 1;
    min-width: 0;
}

.pub-title {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
    line-height: 1.5;
}

.pub-authors {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 4px;
    line-height: 1.5;
}

.author-highlight {
    background-color: #fef9e7;
    padding: 1px 4px;
    border-radius: 6px;
}

.pub-venue {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-style: italic;
    line-height: 1.5;
}

.pub-note {
    font-size: 0.8rem;
    color: #c45c5c;
    font-weight: 600;
    margin-top: 2px;
}

.pub-note a {
    color: #c45c5c;
    text-decoration: none;
}

.pub-note a:hover {
    text-decoration: underline;
}

.pub-links {
    display: flex;
    gap: 12px;
    margin-top: 6px;
}

.pub-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: 4px;
    background: #d6e4f0;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: var(--transition);
}

.pub-links a:hover {
    color: var(--primary-color);
    background: #c5d8e8;
}

.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 16px;
}

.project-card {
    padding: 20px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.project-card:hover {
    border-color: var(--primary-light);
}

.project-icon {
    width: 40px;
    height: 40px;
    background: var(--primary-color);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 12px;
}

.project-icon i {
    font-size: 1.1rem;
    color: white;
}

.project-card h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.project-card p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 12px;
    line-height: 1.5;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.tag {
    padding: 3px 8px;
    background: var(--bg-secondary);
    color: var(--text-muted);
    font-size: 0.7rem;
    border-radius: 12px;
    font-weight: 500;
}

.timeline {
    position: relative;
    padding-left: 24px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 5px;
    top: 6px;
    bottom: 6px;
    width: 1px;
    background: var(--border-color);
}

.timeline-item {
    position: relative;
    padding-bottom: 24px;
}

.timeline-item:last-child {
    padding-bottom: 0;
}

.timeline-marker {
    position: absolute;
    left: -22px;
    top: 6px;
    width: 10px;
    height: 10px;
    background: var(--primary-color);
    border-radius: 50%;
}

.timeline-content {
    padding: 0;
}

.timeline-date {
    display: inline-block;
    padding: 2px 8px;
    background: #fef9e7;
    color: var(--text-muted);
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    margin-bottom: 8px;
}

.timeline-content h3 {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 2px;
}

.timeline-org {
    font-size: 0.85rem;
    color: var(--primary-color);
    font-weight: 500;
    margin-bottom: 6px;
}

.timeline-content p:not(.timeline-org) {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin: 0;
}

.footer {
    background: transparent;
    border-radius: var(--radius-md);
    padding: 24px;
    text-align: center;
}

.visitor-stats {
    margin-bottom: 20px;
}

.visitor-stats h3 {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
}

.visitor-stats h3 i {
    color: var(--primary-color);
}

.stats-container {
    display: flex;
    justify-content: center;
}

.clustrmaps {
    display: flex;
    justify-content: center;
    min-height: 200px;
    width: 200px;
    margin: 0 auto;
}

.clustrmaps-hint {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 10px;
}

.clustrmaps-hint a {
    color: var(--primary-color);
}

.awards-list {
    list-style: disc;
    padding-left: 20px;
    margin: 0;
}

.awards-list li {
    padding: 6px 0;
    color: var(--text-secondary);
}

.services-content h4 {
    font-size: 1rem;
    color: var(--text-primary);
    margin-bottom: 12px;
    font-weight: 600;
}

.services-list {
    list-style: disc;
    padding-left: 20px;
    margin: 0;
}

.services-list li {
    padding: 6px 0;
    color: var(--text-secondary);
}

.services-list a {
    color: var(--primary-color);
    text-decoration: none;
}

.services-list a:hover {
    text-decoration: underline;
}

.footer-info {
    padding-top: 16px;
    border-top: 1px solid var(--border-color);
}

.footer-info p {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 2px;
}

.last-updated {
    font-size: 0.75rem !important;
}

@media (max-width: 768px) {
    .container {
        padding: 20px 15px;
    }

    .profile-card {
        padding: 30px 20px;
    }

    .avatar {
        width: 110px;
        height: 110px;
    }

    .name {
        font-size: 1.5rem;
    }

    .section {
        padding: 20px;
    }

    .publication-item {
        flex-direction: column;
        gap: 4px;
    }

    .pub-number {
        min-width: auto;
    }

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