/* Base styles */
:root {
    --primary-color: #cc0000;
    --text-color: #2d3436;
    --heading-color: #2d3436;
    --link-color: #0984e3;
    --background-color: #fff;
    --border-color: #dfe6e9;
    --secondary-text: #636e72;
}

body {
    margin: 0;
    padding: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.7;
    color: var(--text-color);
    background-color: var(--background-color);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    font-size: 16px;
}

h1, h2, h3, h4, h5, h6 {
    color: var(--heading-color);
    line-height: 1.3;
    margin: 2rem 0 1rem;
}

h1 {
    font-size: 2.5em;
    border-bottom: 2px solid #eee;
    padding-bottom: 0.3em;
}

h2 {
    font-size: 2em;
}

/* Header */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0.25rem 1rem;
    display: flex;
    justify-content: center;
    align-items: center;
}

.main-nav {
    display: flex;
    gap: 1.5rem;
    align-items: center;
    padding: 0.5rem 0; 
}

.main-nav a {
    color: #2c3e50;
    text-decoration: none;
    font-size: 1.3rem; 
    font-weight: 500;
    padding: 0.2rem 1rem;  
    transition: color 0.2s ease;
}

.main-nav a.active {
    color: #b80606;
    border-bottom: 2px solid #b80606;
}

.main-nav a:hover {
    color: #b80606;
}

/* Content */
.content {
    flex: 1;
    max-width: 1000px;
    margin: 0 auto;
    padding: 5rem 2rem 2rem;  /* Increased top padding to prevent header overlap */
}

/* Footer */
.site-footer {
    margin-top: 4rem;
    padding: 2rem 0;
    background-color: #f8f9fa;
    border-top: 1px solid var(--border-color);
}

.footer-container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 2rem;
    text-align: center;
}

.social-icons {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.social-icons .icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    color: var(--text-color);
    text-decoration: none;
    transition: transform 0.2s;
}

.social-icons .icon i {
    font-size: 24px;
    transition: color 0.2s;
}

.social-icons .icon:hover {
    transform: translateY(-2px);
}

.social-icons .icon:hover i {
    color: var(--primary-color);
}

.copyright {
    color: #666;
    font-size: 0.9rem;
}

.copyright p {
    margin: 0.5rem 0;
}

.credits {
    font-size: 0.8rem;
}

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

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

/* Publications */
.publication {
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.publication-title {
    font-weight: 600;
    color: var(--heading-color);
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

.publication-authors {
    margin-bottom: 0.5rem;
    color: var(--text-color);
}

.publication-venue {
    font-style: italic;
    color: var(--secondary-text);
}

.pmid-link {
    color: var(--link-color);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s ease;
}

.pmid-link:hover {
    color: var(--primary-color);
    text-decoration: underline;
}

/* Profile section */
.profile-section {
    display: flex;
    gap: 2rem;
    margin-bottom: 2rem;
    align-items: start;
}

.profile-text {
    flex: 2;
    font-size: 1.1em;
    text-align: justify;
    hyphens: auto;
}

.profile-image {
    flex: 1;
}

.profile-image img {
    max-width: 100%;
    border-radius: 5px;
}

/* News section */
.news {
    margin: 2rem 0;
}

.news-item {
    margin-bottom: 1.5em;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
}

.news-date {
    font-weight: 600;
    color: #2d3436;
    min-width: 100px;
    flex-shrink: 0;
}

.news-content {
    flex: 1;
    min-width: 300px;
    color: var(--text-color);
}

.news-content a {
    color: var(--link-color);
    text-decoration: none;
    transition: color 0.2s ease;
}

.news-content a:hover {
    color: var(--primary-color);
    text-decoration: underline;
}

@media (max-width: 600px) {
    .news-item {
        flex-direction: column;
        gap: 0.5rem;
    }

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

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

/* Responsive design */
@media (max-width: 768px) {
    .header-container {
        padding: 0.3rem 1rem;  /* Reduced padding for mobile */
    }

    .main-nav {
        gap: 0.5rem;
    }

    .main-nav a {
        font-size: 1rem;
        margin: 0 0.5rem;
        padding: 0.2rem 0.5rem;  /* Reduced padding for mobile */
    }

    .content {
        padding: 5rem 1rem 1rem;  /* Adjusted padding for mobile */
    }

    .footer-container {
        padding: 0 1rem;
    }

    .social-icons {
        gap: 1rem;
    }

    .social-icons .icon {
        width: 36px;
        height: 36px;
    }

    .social-icons .icon i {
        font-size: 20px;
    }
}

@media (max-width: 480px) {
    .main-nav {
        gap: 0.3rem;
    }

    .main-nav a {
        font-size: 0.9rem;
        padding: 0.3rem;
        margin: 0 0.3rem;
    }

    .social-icons {
        gap: 0.8rem;
    }

    .social-icons .icon {
        width: 32px;
        height: 32px;
    }

    .social-icons .icon i {
        font-size: 18px;
    }
}

a {
    color: #2980b9;
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover {
    color: #3498db;
    text-decoration: underline;
}

.author-highlight {
    font-weight: 700;
    color: #2c3e50;
}

/* People page styles */
.people-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    margin: 2rem 0;
}

.person {
    text-align: left;
    margin-bottom: 2rem;
}

.person img {
    width: 100%;
    aspect-ratio: 1;
    object-fit: cover;
    border-radius: 4px;
    margin-bottom: 1rem;
}

.person h3 {
    margin: 0.5rem 0;
    font-size: 1.2rem;
    color: var(--heading-color);
}

.person-title {
    margin: 0.2rem 0;
    color: var(--text-color);
}

.person-dept {
    margin: 0.2rem 0;
    color: var(--text-color);
}

.person-contact {
    margin-top: 0.5rem;
    font-size: 0.9rem;
    color: var(--secondary-text);
}

.person-contact a {
    color: var(--link-color);
    text-decoration: none;
}

.person-contact a:hover {
    color: var(--primary-color);
    text-decoration: underline;
}

@media (max-width: 900px) {
    .people-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
    }
}

@media (max-width: 600px) {
    .people-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
}

/* Publications List Styles */
.publications-list {
    margin-top: 1rem;
}

.publication-item {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.pub-figure {
    flex: 0 0 150px;
}

.pub-figure img {
    width: 100%;
    height: auto;
    border-radius: 4px;
    border: 1px solid var(--border-color);
}

.pub-content {
    flex: 1;
}

.pub-title {
    margin-bottom: 0.5rem;
    font-size: 1rem;
    line-height: 1.4;
    font-weight: 600;
}

.pub-title a {
    color: var(--heading-color);
    text-decoration: none;
}

.pub-title a:hover {
    color: var(--link-color);
    text-decoration: underline;
}

.pub-authors {
    margin-bottom: 0.5rem;
    color: var(--text-color);
    font-size: 0.9rem;
    line-height: 1.6;
}

.pub-venue {
    color: var(--text-color);
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
}

.pub-links {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    font-size: 0.9rem;
    color: var(--secondary-text);
}

.pub-links a {
    color: var(--link-color);
    text-decoration: none;
}

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

@media (max-width: 768px) {
    .publication-item {
        flex-direction: column;
    }

    .pub-figure {
        flex: 0 0 auto;
        max-width: 300px;
        margin: 0 auto;
    }
}

.more-publications {
    margin-top: 3rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
    text-align: center;
    color: var(--secondary-text);
}

.citation-count {
    display: inline-block;
    margin-left: 1rem;
    color: var(--secondary-text);
    font-size: 0.9rem;
    font-style: italic;
}

/* Resume Styles */
.resume-container {
    max-width: 900px;
    margin: 0 auto;
    padding: 2rem;
}

.resume-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 3rem;
}

.cv-button {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.8rem 1.5rem;
    background-color: var(--primary-color);
    color: white;
    border-radius: 4px;
    text-decoration: none;
    transition: all 0.3s ease;
}

.cv-button:hover {
    background-color: #990000;
    transform: translateY(-2px);
}

.resume-section {
    margin-bottom: 3rem;
}

.resume-section h2 {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    color: var(--heading-color);
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--border-color);
}

.timeline {
    position: relative;
    padding-left: 2rem;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background-color: var(--border-color);
}

.timeline-item {
    position: relative;
    margin-bottom: 2rem;
    padding-left: 1.5rem;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -2.25rem;
    top: 0.5rem;
    width: 1rem;
    height: 1rem;
    background-color: var(--primary-color);
    border-radius: 50%;
}

.timeline-date {
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.timeline-content h3 {
    margin: 0 0 0.5rem;
    color: var(--heading-color);
}

.institution {
    color: var(--secondary-text);
    font-style: italic;
    margin-bottom: 0.5rem;
}

.experience-list {
    list-style-type: none;
    padding-left: 0;
}

.experience-list li {
    position: relative;
    padding-left: 1.2rem;
    margin-bottom: 0.5rem;
}

.experience-list li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--primary-color);
}

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

.skill-category h3 {
    color: var(--heading-color);
    margin-bottom: 1rem;
}

.skills-list {
    list-style-type: none;
    padding-left: 0;
}

.skills-list li {
    position: relative;
    padding-left: 1.2rem;
    margin-bottom: 0.5rem;
}

.skills-list li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--primary-color);
}

.awards-grid {
    display: grid;
    gap: 1.5rem;
}

.award-item {
    display: flex;
    gap: 1.5rem;
}

.award-year {
    font-weight: 600;
    color: var(--primary-color);
    min-width: 4rem;
}

.award-content h3 {
    margin: 0 0 0.3rem;
    color: var(--heading-color);
}

.award-content p {
    color: var(--secondary-text);
    margin: 0;
}

@media (max-width: 768px) {
    .resume-header {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }

    .timeline {
        padding-left: 1rem;
    }

    .timeline-item {
        padding-left: 1rem;
    }

    .timeline-item::before {
        left: -1.75rem;
    }

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

/* Language switch button */
.lang-switch {
    position: absolute;
    top: 4rem;
    right: 1rem;
    margin: 0;
    z-index: 1;
}

.lang-switch a {
    padding: 0.3rem 0.8rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    background-color: white;
    color: #333;
    text-decoration: none;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.lang-switch a:hover {
    background-color: #f5f5f5;
    text-decoration: none;
}

@media (max-width: 768px) {
    .lang-switch {
        position: absolute;
        top: 0;
        right: 0;
    }
    
    .lang-switch a {
        padding: 0.2rem 0.6rem;
        font-size: 0.8rem;
    }
}

.title-container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
}

@media (max-width: 768px) {
    .lang-switch a {
        padding: 0.2rem 0.6rem;
        font-size: 0.8rem;
    }
    
    .title-container {
        flex-direction: column;
        gap: 0.5rem;
    }
}