/* Modern CSS Reset and Variables */
:root {
    --primary-color: #1e3a5f;
    --secondary-color: #2563eb;
    --accent-color: #f59e0b;
    --text-dark: #1f2937;
    --text-light: #6b7280;
    --bg-light: #f9fafb;
    --bg-white: #ffffff;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 15px rgba(0,0,0,0.1);
    --shadow-xl: 0 20px 25px rgba(0,0,0,0.1);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--bg-white);
    overflow-x: hidden;
}

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

/* Header Styles with Animated Background */
header {
    position: relative;
    min-height: 500px;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.header-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #1e3a5f 0%, #2563eb 50%, #1e3a5f 100%);
    background-size: 200% 200%;
    animation: gradientShift 8s ease infinite;
}

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

.header-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.4);
}

.header-content {
    position: relative;
    z-index: 10;
    text-align: center;
    color: white;
}

.animated-title {
    font-family: 'Playfair Display', serif;
    font-size: 4rem;
    font-weight: 700;
    margin-bottom: 1rem;
    opacity: 0;
    animation: fadeInUp 1s ease forwards;
}

.subtitle {
    font-size: 1.5rem;
    font-weight: 300;
    margin-bottom: 0.5rem;
    opacity: 0;
    animation: fadeInUp 1s ease 0.2s forwards;
}

.affiliation {
    font-size: 1.1rem;
    opacity: 0.9;
    margin-bottom: 2rem;
    opacity: 0;
    animation: fadeInUp 1s ease 0.4s forwards;
}

.header-stats {
    display: flex;
    justify-content: center;
    gap: 3rem;
    margin-top: 2rem;
    opacity: 0;
    animation: fadeInUp 1s ease 0.6s forwards;
}

.stat-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1rem;
}

.stat-item i {
    font-size: 1.2rem;
}

@keyframes fadeInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
    from {
        opacity: 0;
        transform: translateY(20px);
    }
}

/* Navigation Styles */
nav {
    background: white;
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: 100;
    transition: var(--transition);
}

nav ul {
    list-style: none;
    display: flex;
    justify-content: center;
    padding: 0;
}

nav li {
    margin: 0;
}

.nav-link {
    display: block;
    padding: 1.5rem 2rem;
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    position: relative;
    transition: var(--transition);
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 3px;
    background: var(--secondary-color);
    transform: translateX(-50%);
    transition: width 0.3s ease;
}

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

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

/* Main Content Styles */
main {
    padding: 4rem 0;
}

section {
    margin-bottom: 6rem;
}

h2 {
    font-family: 'Playfair Display', serif;
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 2rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.section-number {
    font-size: 1rem;
    color: var(--accent-color);
    font-weight: 700;
    font-family: 'Inter', sans-serif;
}

.section-intro {
    font-size: 1.1rem;
    color: var(--text-light);
    text-align: center;
    margin-bottom: 3rem;
}

/* About Section */
.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
}

.lead {
    font-size: 1.2rem;
    line-height: 1.8;
    margin-bottom: 1.5rem;
    color: var(--text-dark);
}

.about-highlights {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.highlight-card {
    background: var(--bg-light);
    padding: 1.5rem;
    border-radius: 12px;
    display: flex;
    align-items: center;
    gap: 1rem;
    transition: var(--transition);
}

.highlight-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.highlight-card i {
    font-size: 2rem;
    color: var(--secondary-color);
}

.highlight-card h4 {
    font-size: 1.1rem;
    color: var(--primary-color);
    margin-bottom: 0.25rem;
}

/* Research Grid Styles */
.research-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.research-card {
    background: white;
    border: 1px solid #e5e7eb;
    border-radius: 16px;
    padding: 2rem;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.research-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--secondary-color), var(--accent-color));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s ease;
}

.research-card:hover::before {
    transform: scaleX(1);
}

.research-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: transparent;
}

.card-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #e0e7ff, #c7d2fe);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.card-icon i {
    font-size: 1.8rem;
    color: var(--secondary-color);
}

.research-card h3 {
    font-size: 1.3rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.pub-count {
    font-size: 0.9rem;
    color: var(--accent-color);
    font-weight: 600;
    margin-bottom: 0.8rem;
}

.research-card p:last-of-type {
    color: var(--text-light);
    margin-bottom: 1rem;
}

.explore-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--secondary-color);
    font-weight: 500;
    font-size: 0.95rem;
}

.explore-btn i {
    font-size: 0.8rem;
    transition: transform 0.3s ease;
}

.research-card:hover .explore-btn i {
    transform: translateX(4px);
}

/* Publication Display */
.publication-display {
    background: var(--bg-light);
    border-radius: 16px;
    padding: 3rem;
    margin: 2rem 0;
    min-height: 300px;
    transition: var(--transition);
}

.default-message {
    text-align: center;
    color: var(--text-light);
}

.default-message i {
    font-size: 3rem;
    margin-bottom: 1rem;
    color: #d1d5db;
}

.topic-publications {
    animation: fadeIn 0.5s ease;
}

.topic-publications h3 {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

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

.publication-list li {
    margin-bottom: 1.5rem;
    padding-left: 1.5rem;
    position: relative;
    line-height: 1.8;
}

.publication-list li::before {
    content: "▸";
    position: absolute;
    left: 0;
    color: var(--secondary-color);
    font-weight: 700;
}

.publication-list strong {
    color: var(--text-dark);
    font-weight: 600;
}

.publication-list em {
    color: var(--text-light);
    font-style: italic;
}

.more-publications {
    text-align: center;
    margin-top: 3rem;
}

.more-publications a {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--secondary-color);
    text-decoration: none;
    font-weight: 500;
    padding: 0.8rem 2rem;
    border: 2px solid var(--secondary-color);
    border-radius: 50px;
    transition: var(--transition);
}

.more-publications a:hover {
    background: var(--secondary-color);
    color: white;
}

/* Contact Section */
.contact-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    background: var(--bg-light);
    padding: 3rem;
    border-radius: 16px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.contact-item {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.contact-item i {
    font-size: 1.5rem;
    color: var(--secondary-color);
    width: 40px;
}

.contact-item h4 {
    color: var(--primary-color);
    margin-bottom: 0.25rem;
}

/* Social Links */
.social-links {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.social-link {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    padding: 1rem 1.5rem;
    background: white;
    border-radius: 12px;
    text-decoration: none;
    color: var(--text-dark);
    transition: var(--transition);
    border: 1px solid #e5e7eb;
}

.social-link:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--secondary-color);
    color: var(--secondary-color);
}

.social-link i {
    font-size: 1.2rem;
}

/* Footer */
footer {
    background: var(--primary-color);
    color: white;
    text-align: center;
    padding: 2rem 0;
    margin-top: 6rem;
}

/* Animations */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeIn 0.8s ease forwards;
}

@keyframes fadeIn {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .animated-title {
        font-size: 3rem;
    }
    
    nav ul {
        flex-wrap: wrap;
    }
    
    .nav-link {
        padding: 1rem 1.5rem;
    }
    
    .header-stats {
        flex-direction: column;
        gap: 1rem;
    }
    
    .about-content,
    .contact-container {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .research-grid {
        grid-template-columns: 1fr;
    }
    
    .impact-grid {
        grid-template-columns: 1fr;
    }
    
    .teaching-grid {
        grid-template-columns: 1fr;
    }
    
    .areas-grid {
        grid-template-columns: 1fr;
    }
    
    .media-grid {
        grid-template-columns: 1fr;
    }
    
    .social-links {
        grid-template-columns: 1fr;
    }
    
    .profile-links {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    h2 {
        font-size: 2rem;
    }
}

/* Additional Visual Effects */
.research-card.active {
    background: var(--bg-light);
    border-color: var(--secondary-color);
}

/* Smooth Scrolling */
html {
    scroll-behavior: smooth;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: var(--secondary-color);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-color);
}

/* Impact Section Styles */
.impact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.impact-card {
    background: var(--bg-white);
    border: 1px solid #e5e7eb;
    border-radius: 16px;
    padding: 2rem;
    transition: var(--transition);
}

.impact-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    border-color: var(--secondary-color);
}

.impact-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #fef3c7, #fbbf24);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.impact-icon i {
    font-size: 1.8rem;
    color: var(--accent-color);
}

.impact-card h3 {
    color: var(--primary-color);
    font-size: 1.3rem;
    margin-bottom: 1rem;
}

.impact-card ul {
    list-style: none;
}

.impact-card li {
    padding: 0.5rem 0;
    color: var(--text-dark);
    position: relative;
    padding-left: 1.5rem;
}

.impact-card li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--secondary-color);
    font-weight: 700;
}

/* Research Statement */
.research-statement {
    background: linear-gradient(135deg, #eff6ff, #dbeafe);
    padding: 3rem;
    border-radius: 16px;
    text-align: center;
    margin-top: 3rem;
}

.research-statement h3 {
    color: var(--primary-color);
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
}

.statement-text {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-dark);
    font-style: italic;
    max-width: 800px;
    margin: 0 auto;
}

/* Teaching Section Styles */
.teaching-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.teaching-card {
    background: var(--bg-light);
    padding: 2rem;
    border-radius: 16px;
    text-align: center;
    transition: var(--transition);
}

.teaching-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.teaching-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #e0e7ff, #c7d2fe);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
}

.teaching-icon i {
    font-size: 2.5rem;
    color: var(--secondary-color);
}

.teaching-card h3 {
    color: var(--primary-color);
    font-size: 1.4rem;
    margin-bottom: 1rem;
}

.teaching-card p {
    color: var(--text-dark);
    line-height: 1.7;
}

/* Supervision Areas */
.supervision-areas {
    background: white;
    padding: 2.5rem;
    border-radius: 16px;
    border: 1px solid #e5e7eb;
}

.supervision-areas h3 {
    color: var(--primary-color);
    font-size: 1.5rem;
    margin-bottom: 2rem;
    text-align: center;
}

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

.area-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: var(--bg-light);
    border-radius: 8px;
    transition: var(--transition);
}

.area-item:hover {
    background: #e0e7ff;
    transform: translateX(5px);
}

.area-item i {
    color: var(--secondary-color);
    font-size: 1.2rem;
}

.area-item span {
    color: var(--text-dark);
    font-weight: 500;
}

/* Expertise Tags */
.expertise-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
    margin-top: 1.5rem;
}

.tag {
    display: inline-block;
    background: var(--secondary-color);
    color: white;
    padding: 0.4rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition);
}

.tag:hover {
    background: var(--primary-color);
    transform: translateY(-2px);
}

/* Media Section Styles */
.media-section {
    margin-top: 3rem;
}

.media-section h3 {
    color: var(--primary-color);
    font-size: 1.8rem;
    margin-bottom: 2rem;
    text-align: center;
}

.media-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.media-item {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    border: 1px solid #e5e7eb;
    transition: var(--transition);
}

.media-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--accent-color);
}

.media-item i {
    font-size: 2.5rem;
    color: var(--accent-color);
    margin-bottom: 1rem;
}

.media-item h4 {
    color: var(--primary-color);
    font-size: 1.2rem;
    margin-bottom: 0.8rem;
}

.media-item p {
    color: var(--text-light);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* Enhanced Footer Styles */
.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    padding: 3rem 0 2rem;
}

.footer-section h4 {
    color: white;
    font-size: 1.2rem;
    margin-bottom: 1rem;
}

.footer-section p {
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.6;
}

.footer-section ul {
    list-style: none;
}

.footer-section li {
    margin-bottom: 0.5rem;
}

.footer-section a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: var(--transition);
}

.footer-section a:hover {
    color: white;
    text-decoration: underline;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    padding-top: 2rem;
    text-align: center;
    color: rgba(255, 255, 255, 0.8);
}

/* Research Profiles Section */
.research-profiles {
    margin-top: 3rem;
}

.research-profiles h3 {
    color: var(--primary-color);
    font-size: 1.4rem;
    margin-bottom: 1.5rem;
}

.profile-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 1rem;
}

.profile-link {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    padding: 1.2rem 1rem;
    background: var(--bg-light);
    border-radius: 12px;
    text-decoration: none;
    color: var(--text-dark);
    transition: var(--transition);
    border: 1px solid #e5e7eb;
    text-align: center;
}

.profile-link:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--secondary-color);
    background: white;
}

.profile-link i {
    font-size: 1.8rem;
    color: var(--secondary-color);
}

.profile-link span {
    font-weight: 500;
    font-size: 0.95rem;
}

/* Course List Styling */
.course-list {
    list-style: none;
    padding: 0;
    margin-top: 1rem;
}

.course-list li {
    padding: 0.5rem 0;
    color: var(--text-dark);
}

.course-list strong {
    color: var(--secondary-color);
    font-weight: 600;
    margin-right: 0.5rem;
}