/* ============================================
   CSS Variables & Reset
   ============================================ */
:root {
    --primary-green: #2d8659;
    --primary-blue: #1e6fa5;
    --accent-teal: #3db5a0;
    --dark-bg: #0a1929;
    --dark-surface: #132f4c;
    --light-bg: #f8fafc;
    --text-primary: #1a202c;
    --text-secondary: #4a5568;
    --text-light: #a0aec0;
    --white: #ffffff;
    --gradient-primary: linear-gradient(135deg, #2d8659 0%, #1e6fa5 100%);
    --gradient-hero: linear-gradient(135deg, #0a1929 0%, #132f4c 50%, #1e6fa5 100%);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.2);
    --shadow-glow: 0 0 40px rgba(62, 181, 160, 0.3);
}

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

html {
    scroll-behavior: smooth;
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* ============================================
   Navigation
   ============================================ */
.navbar {
width: 100%;
background: rgba(255, 255, 255, 0.95);
backdrop-filter: blur(10px);
box-shadow: var(--shadow-sm);
z-index: 1000;
transition: all 0.3s ease;
}

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

.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--primary-green);
    font-family: 'Space Grotesk', sans-serif;
}

.logo-icon {
    font-size: 1.5rem;
}

.nav-menu {
    display: flex;
    gap: 2rem;
    list-style: none;
    padding: 0;
    margin: 0;
}

.nav-link {
    text-decoration: none;
    color: #222;
    font-weight: 500;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width 0.3s ease;
}

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

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

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    position: absolute;
    right: 1rem;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: #222;
}

/* ===== Mobile ===== */
@media (max-width: 768px) {

    .nav-container {
        justify-content: space-between;
    }

    .hamburger {
        display: flex;
    }

    .nav-menu {
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: #fff;

        flex-direction: column;
        align-items: center;
        gap: 1.5rem;

        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease;
    }

    .nav-menu.active {
        max-height: 500px;
        padding: 1.5rem 0;
        border-bottom: 1px solid #eee;
    }
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    color: var(--white);
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 0;
}

.mosaic-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    grid-auto-rows: minmax(150px, auto);
    gap: 2px;
    overflow: hidden;
}

.mosaic-item {
    position: relative;
    overflow: hidden;
    background: var(--dark-bg);
}

.mosaic-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    opacity: 0.6;
    transition: opacity 0.3s ease;
}

.mosaic-item:hover img {
    opacity: 0.8;
}

/* Random sizes for mosaic items */
.mosaic-item:nth-child(1) { grid-row: span 2; }
.mosaic-item:nth-child(2) { grid-row: span 1; }
.mosaic-item:nth-child(3) { grid-row: span 3; grid-column: span 1; }
.mosaic-item:nth-child(4) { grid-row: span 2; }
.mosaic-item:nth-child(5) { grid-row: span 1; }
.mosaic-item:nth-child(6) { grid-row: span 2; grid-column: span 1; }
.mosaic-item:nth-child(7) { grid-row: span 1; }
.mosaic-item:nth-child(8) { grid-row: span 3; }
.mosaic-item:nth-child(9) { grid-row: span 2; }
.mosaic-item:nth-child(10) { grid-row: span 1; }
.mosaic-item:nth-child(11) { grid-row: span 2; }
.mosaic-item:nth-child(12) { grid-row: span 1; grid-column: span 1; }
.mosaic-item:nth-child(13) { grid-row: span 3; }
.mosaic-item:nth-child(14) { grid-row: span 2; }
.mosaic-item:nth-child(15) { grid-row: span 1; }
.mosaic-item:nth-child(16) { grid-row: span 2; }
.mosaic-item:nth-child(17) { grid-row: span 1; }
.mosaic-item:nth-child(18) { grid-row: span 3; }
.mosaic-item:nth-child(19) { grid-row: span 2; }
.mosaic-item:nth-child(20) { grid-row: span 1; }
.mosaic-item:nth-child(21) { grid-row: span 2; }

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(10, 25, 41, 0.85) 0%, rgba(19, 47, 76, 0.75) 50%, rgba(30, 111, 165, 0.7) 100%);
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 900px;
    padding: 2rem;
    animation: fadeInUp 1s ease-out;
}

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

.hero-badge {
    display: inline-block;
    padding: 0.5rem 1.5rem;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 50px;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 2rem;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.hero-title {
    font-family: 'Space Grotesk', sans-serif;
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 1.5rem;
}

.title-line {
    display: block;
}

.highlight {
    background: linear-gradient(135deg, #3db5a0 0%, #ffffff 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 2.5rem;
    line-height: 1.8;
}

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

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

.btn-primary {
    background: var(--white);
    color: var(--primary-green);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(255, 255, 255, 0.3);
}

.btn-secondary {
    background: transparent;
    color: var(--white);
    border-color: rgba(255, 255, 255, 0.3);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--white);
}

.btn-outline {
    background: transparent;
    color: var(--primary-green);
    border-color: var(--primary-green);
}

.btn-outline:hover {
    background: var(--primary-green);
    color: var(--white);
}

.btn-full {
    width: 100%;
}

.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
}

.mouse {
    width: 24px;
    height: 40px;
    border: 2px solid rgba(255, 255, 255, 0.5);
    border-radius: 15px;
    position: relative;
}

.mouse::before {
    content: '';
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 8px;
    background: rgba(255, 255, 255, 0.5);
    border-radius: 2px;
    animation: scroll 2s infinite;
}

@keyframes scroll {
    0% { opacity: 1; transform: translateX(-50%) translateY(0); }
    100% { opacity: 0; transform: translateX(-50%) translateY(12px); }
}

/* ============================================
   Section Styles
   ============================================ */
section {
    padding: 6rem 0;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-tag {
    display: inline-block;
    padding: 0.5rem 1.5rem;
    background: var(--gradient-primary);
    color: var(--white);
    border-radius: 50px;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.section-title {
    font-family: 'Space Grotesk', sans-serif;
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

/* ============================================
   About Section
   ============================================ */
.about {
    background: var(--white);
}

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

.about-text .lead {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.about-text p {
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.8;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-top: 2rem;
}

.stat-card {
    text-align: center;
    padding: 1.5rem;
    background: var(--light-bg);
    border-radius: 16px;
    transition: transform 0.3s ease;
}

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

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-family: 'Space Grotesk', sans-serif;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-top: 0.5rem;
}

.about-visual {
    position: relative;
}

.visual-card {
    position: relative;
    aspect-ratio: 1;
    background: var(--gradient-primary);
    border-radius: 24px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.card-glow {
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.3) 0%, transparent 70%);
    animation: rotate 20s linear infinite;
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.map-pattern {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        repeating-linear-gradient(0deg, transparent, transparent 2px, rgba(255, 255, 255, 0.1) 2px, rgba(255, 255, 255, 0.1) 4px),
        repeating-linear-gradient(90deg, transparent, transparent 2px, rgba(255, 255, 255, 0.1) 2px, rgba(255, 255, 255, 0.1) 4px);
    background-size: 40px 40px;
}

.logo-container {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 2;
    width: 90%;
    max-width: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.about-logo {
    width: 100%;
    height: auto;
    object-fit: contain;
    filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.2));
}

/* ============================================
   Research Section
   ============================================ */
.research {
    background: var(--light-bg);
}

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

.research-card {
    position: relative;
    background: var(--white);
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
    overflow: hidden;
}

.research-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.research-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

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

.card-icon {
    font-size: 3rem;
    margin-bottom: 1.5rem;
    display: block;
}

.research-card h3 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.research-card p {
    color: var(--text-secondary);
    line-height: 1.8;
}

.card-hover-effect {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: radial-gradient(circle, rgba(62, 181, 160, 0.1) 0%, transparent 70%);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.6s ease, height 0.6s ease;
    pointer-events: none;
}

.research-card:hover .card-hover-effect {
    width: 300px;
    height: 300px;
}

/* ============================================
   Projects Section
   ============================================ */
.projects {
    background: var(--white);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2.5rem;
}

.project-card {
    background: var(--light-bg);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
}

.project-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.project-image {
    width: 100%;
    aspect-ratio: 16/9;
    background: var(--gradient-primary);
    position: relative;
    overflow: hidden;
}

.project-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(45, 134, 89, 0.1) 0%, rgba(30, 111, 165, 0.1) 100%);
    color: var(--text-secondary);
    text-align: center;
    padding: 2rem;
}

.placeholder-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
    opacity: 0.6;
}

.project-placeholder p {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.project-placeholder small {
    font-size: 0.75rem;
    color: var(--text-secondary);
    line-height: 1.4;
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.project-content {
    padding: 2rem;
}

.project-content h3 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.project-description {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

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

.project-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: var(--white);
    color: var(--primary-green);
    border: 2px solid var(--primary-green);
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.875rem;
    transition: all 0.3s ease;
}

.project-link:hover {
    background: var(--primary-green);
    color: var(--white);
    transform: translateY(-2px);
}

.project-link span {
    font-size: 1rem;
}

/* ============================================
   Teaching Section
   ============================================ */
.teaching {
    background: var(--light-bg);
}

.courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2.5rem;
}

.course-card {
    background: var(--white);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
}

.course-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.course-image {
    width: 100%;
    aspect-ratio: 16/9;
    background: var(--gradient-primary);
    position: relative;
    overflow: hidden;
}

.course-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(45, 134, 89, 0.1) 0%, rgba(30, 111, 165, 0.1) 100%);
    color: var(--text-secondary);
    text-align: center;
    padding: 2rem;
}

.course-placeholder .placeholder-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
    opacity: 0.6;
}

.course-placeholder p {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.course-placeholder small {
    font-size: 0.75rem;
    color: var(--text-secondary);
    line-height: 1.4;
}

.course-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.course-content {
    padding: 2rem;
}

.course-content h3 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.course-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--primary-green);
    margin-bottom: 1rem;
}

.course-details {
    color: var(--text-secondary);
    line-height: 1.8;
}

.course-details p {
    margin-bottom: 0.5rem;
}

.course-details strong {
    color: var(--text-primary);
}

/* ============================================
   Team Section
   ============================================ */
.team {
    background: var(--white);
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.team-card-empty {
    visibility: hidden;
    pointer-events: none;
}

.team-card {
    background: var(--light-bg);
    border-radius: 20px;
    overflow: hidden;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-sm);
}

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

.team-image {
    width: 100%;
    aspect-ratio: 1;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
}

.image-placeholder {
    font-size: 4rem;
    opacity: 0.8;
}

.team-info {
    padding: 2rem;
    text-align: center;
}

.team-info h3 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.team-role {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: 1rem;
}

.team-social {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.social-link {
    color: var(--primary-green);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    transition: color 0.3s ease;
}

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

/* ============================================
   Publications Section
   ============================================ */
.publications {
    background: var(--light-bg);
}

.publications-list {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    margin-bottom: 3rem;
}

.publication-item {
    display: grid;
    grid-template-columns: 80px 1fr;
    gap: 2rem;
    background: var(--white);
    padding: 2rem;
    border-radius: 16px;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

.publication-item:hover {
    transform: translateX(10px);
    box-shadow: var(--shadow-md);
}

.pub-year {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary-green);
    font-family: 'Space Grotesk', sans-serif;
}

.pub-content h3 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.pub-authors {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: 1rem;
}

.pub-abstract {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 1rem;
}

.pub-link {
    color: var(--primary-green);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s ease;
}

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

.publications-footer {
    text-align: center;
}

/* ============================================
   Contact Section
   ============================================ */
.contact {
    background: var(--white);
}

.contact-content {
    display: flex;
    justify-content: center;
}

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

.info-card {
    flex: 1;
    min-width: 250px;
    padding: 2rem;
    background: var(--light-bg);
    border-radius: 16px;
    transition: transform 0.3s ease;
}

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

.info-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.info-card h3 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.info-card p {
    color: var(--text-secondary);
    line-height: 1.8;
}

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

.social-btn {
    padding: 0.5rem 1.5rem;
    background: var(--white);
    color: var(--primary-green);
    border: 2px solid var(--primary-green);
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.875rem;
    transition: all 0.3s ease;
}

.social-btn:hover {
    background: var(--primary-green);
    color: var(--white);
}

.contact-form {
    background: var(--light-bg);
    padding: 2.5rem;
    border-radius: 20px;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-input {
    width: 100%;
    padding: 1rem;
    border: 2px solid transparent;
    border-radius: 12px;
    background: var(--white);
    font-family: 'Inter', sans-serif;
    font-size: 1rem;
    color: var(--text-primary);
    transition: all 0.3s ease;
}

.form-input:focus {
    outline: none;
    border-color: var(--primary-green);
    box-shadow: 0 0 0 4px rgba(45, 134, 89, 0.1);
}

.form-textarea {
    resize: vertical;
    min-height: 120px;
}

/* ============================================
   Footer
   ============================================ */
.footer {
    background: var(--dark-bg);
    color: var(--white);
    padding: 4rem 0 2rem;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 4rem;
    margin-bottom: 3rem;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 700;
    font-size: 1.25rem;
    margin-bottom: 1rem;
    font-family: 'Space Grotesk', sans-serif;
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.8;
}

.footer-column h4 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

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

.footer-column ul li {
    margin-bottom: 0.75rem;
}

.footer-column ul li a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-column ul li a:hover {
    color: var(--white);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.7);
}


/* ============================================
   News Section
   ============================================ */
.news {
    background: var(--white);
}

.news-list {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.news-item {
    background: var(--light-bg);
    padding: 2rem;
    border-radius: 16px;
    border-left: 4px solid var(--primary-green);
    transition: all 0.3s ease;
}

.news-item:hover {
    transform: translateX(5px);
    box-shadow: var(--shadow-md);
}

.news-date {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--primary-green);
    margin-bottom: 0.5rem;
    display: block;
}

.news-content h3 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.news-content p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 1rem;
}

.news-images {
    display: flex;
    gap: 1rem;
    margin: 1rem 0;
    flex-wrap: wrap;
}

.news-images img {
    max-width: 150px;
    height: auto;
    border-radius: 8px;
    box-shadow: var(--shadow-sm);
    transition: transform 0.3s ease;
}

.news-images img:hover {
    transform: scale(1.05);
}

.news-links {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    margin-top: 1rem;
}

.news-links a {
    color: var(--primary-green);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

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

.news-item-hidden {
    display: none;
}

.news-footer {
    text-align: center;
    margin-top: 2rem;
}

.publication-item-hidden {
    display: none;
}

/* ============================================
   Enhanced Team Section
   ============================================ */
.team-section {
    margin-bottom: 4rem;
}

.team-section-title {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 2rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--primary-green);
}

.team-member-large {
    display: grid;
    grid-template-columns: 250px 1fr;
    gap: 3rem;
    background: var(--light-bg);
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: var(--shadow-md);
    margin-bottom: 2rem;
}

.team-member-image {
    width: 100%;
}

.team-member-image img {
    width: 100%;
    height: auto;
    border-radius: 16px;
    object-fit: cover;
    box-shadow: var(--shadow-sm);
}

.team-member-info h3 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.team-bio {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 1rem;
}

.team-bio-small {
    color: var(--text-secondary);
    line-height: 1.8;
    font-size: 0.9375rem;
    margin-top: 0.5rem;
}

.team-card .team-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 0;
}

.team-card .team-image {
    width: 100%;
    aspect-ratio: 1;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

/* ============================================
   Vacancies Section
   ============================================ */
.vacancies {
    background: var(--light-bg);
}

.vacancy-item {
    background: var(--white);
    padding: 3rem;
    border-radius: 20px;
    box-shadow: var(--shadow-md);
    max-width: 900px;
    margin: 0 auto;
}

.vacancy-item h3 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
}

.vacancy-location {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    font-size: 1.125rem;
}

.vacancy-item p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

.vacancy-list {
    margin-left: 2rem;
    margin-bottom: 1.5rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

.vacancy-list li {
    margin-bottom: 0.75rem;
}

.vacancy-details {
    margin: 2rem 0;
}

.vacancy-contact {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 2px solid var(--light-bg);
    color: var(--text-primary);
}

.vacancy-contact a {
    color: var(--primary-green);
    text-decoration: none;
    font-weight: 600;
}

.vacancy-contact a:hover {
    text-decoration: underline;
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: var(--white);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: var(--shadow-md);
        padding: 2rem 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .hamburger {
        display: flex;
    }

    .about-content,
    .contact-info {
        flex-direction: column;
    }

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

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

    .projects-grid,
    .courses-grid {
        grid-template-columns: 1fr;
    }

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

    .team-card-empty {
        display: none;
    }

    .publication-item {
        grid-template-columns: 1fr;
    }

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

    .hero-buttons {
        flex-direction: column;
    }

    .btn {
        width: 100%;
        text-align: center;
    }

    .team-member-large {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .team-member-image {
        max-width: 250px;
        margin: 0 auto;
    }

    .mosaic-background {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
        grid-auto-rows: minmax(200px, auto);
    }

    .vacancy-item {
        padding: 2rem;
    }

    .news-images img {
        max-width: 120px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }

    section {
        padding: 4rem 0;
    }

    .hero-content {
        padding: 1rem;
    }
}