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

:root {
    --primary: #2563eb;
    --primary-dark: #1e40af;
    --secondary: #0f172a;
    --accent: #3b82f6;
    --text-light: #64748b;
    --bg-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --card-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #1f2937;
    overflow-x: hidden;
    background: linear-gradient(to bottom, #ffffff, #f8fafc);
}

/* Navigation */
nav {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    transition: all 0.3s ease;
}

nav.scrolled {
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--bg-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav-links a {
    text-decoration: none;
    color: var(--secondary);
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: width 0.3s ease;
}

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

/* Hero Section */
.hero {
    margin-top: 80px;
    padding: 4rem 2rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1440 320"><path fill="%23ffffff20" fill-opacity="1" d="M0,96L48,112C96,128,192,160,288,160C384,160,480,128,576,122.7C672,117,768,139,864,138.7C960,139,1056,117,1152,106.7C1248,96,1344,96,1392,96L1440,96L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z"></path></svg>') no-repeat bottom;
    background-size: cover;
    opacity: 0.1;
}

.hero-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-text h1 {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
    animation: fadeInUp 0.8s ease;
}

.hero-text .subtitle {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    opacity: 0.95;
    animation: fadeInUp 0.8s ease 0.2s both;
}

.hero-text .description {
    font-size: 1.1rem;
    line-height: 1.8;
    opacity: 0.9;
    animation: fadeInUp 0.8s ease 0.4s both;
}

.hero-image {
    animation: fadeIn 1s ease 0.6s both;
}

.hero-image img {
    width: 100%;
    border-radius: 20px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    border: 4px solid rgba(255, 255, 255, 0.2);
    transition: transform 0.3s ease;
}

.hero-image img:hover {
    transform: scale(1.05);
}

/* Section Styles */
section {
    padding: 4rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 3rem;
    text-align: center;
    background: var(--bg-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: var(--bg-gradient);
    border-radius: 2px;
}

/* Research Cards */
.research-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.research-card {
    background: white;
    border-radius: 16px;
    padding: 2rem;
    box-shadow: var(--card-shadow);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.research-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--bg-gradient);
}

.research-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.15);
}

.research-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--secondary);
}

.research-card .status {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: rgba(59, 130, 246, 0.1);
    color: var(--accent);
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

/* Lab Section */
.lab-container {
    margin-top: 3rem;
}

.lab-card {
    background: white;
    border-radius: 20px;
    padding: 3rem;
    box-shadow: var(--card-shadow);
    position: relative;
    overflow: hidden;
}

.lab-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 5px;
    background: var(--bg-gradient);
}

.lab-info {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 3rem;
}

.supervisor h4, .lab-focus h4 {
    color: var(--primary);
    margin-bottom: 1rem;
    font-size: 1.25rem;
}

.supervisor p {
    line-height: 1.8;
    color: var(--text-light);
}

.supervisor strong {
    color: var(--secondary);
    font-size: 1.1rem;
}

.lab-link {
    display: inline-block;
    margin-top: 1rem;
    padding: 0.5rem 1rem;
    background: var(--bg-gradient);
    color: white;
    text-decoration: none;
    border-radius: 8px;
    transition: all 0.3s ease;
    font-weight: 500;
}

.lab-link:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(102, 126, 234, 0.3);
}

.lab-focus p {
    line-height: 1.8;
    color: #4b5563;
}

/* Publications Section */
.publications-container {
    margin-top: 3rem;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

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

.publication-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 5px;
    background: linear-gradient(135deg, #06b6d4 0%, #0891b2 100%);
}

.publication-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.15);
}

.publication-type {
    display: inline-block;
    padding: 0.375rem 0.875rem;
    background: linear-gradient(135deg, #06b6d4 0%, #0891b2 100%);
    color: white;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.publication-title {
    font-size: 1.5rem;
    color: var(--secondary);
    margin-bottom: 1rem;
    line-height: 1.4;
}

.publication-authors {
    color: var(--text-light);
    margin-bottom: 1.5rem;
    line-height: 1.6;
    font-size: 0.95rem;
}

.publication-authors strong {
    color: var(--primary);
    font-weight: 700;
}

.publication-details {
    padding: 1.5rem;
    background: #f9fafb;
    border-radius: 12px;
    margin-bottom: 1.5rem;
}

.publication-details p {
    margin-bottom: 0.5rem;
    color: #4b5563;
}

.publication-details p:last-child {
    margin-bottom: 0;
}

.journal-name {
    font-weight: 600;
    color: var(--secondary);
    font-size: 1.1rem;
}

.publication-info {
    color: var(--text-light);
    font-size: 0.95rem;
}

.publication-date {
    color: #06b6d4;
    font-weight: 500;
}

.publication-links {
    display: flex;
    align-items: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.publication-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    background: linear-gradient(135deg, #06b6d4 0%, #0891b2 100%);
    color: white;
    text-decoration: none;
    border-radius: 8px;
    transition: all 0.3s ease;
    font-weight: 500;
    font-size: 0.95rem;
}

.publication-link:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(6, 182, 212, 0.3);
}

.article-topic {
    color: var(--text-light);
    font-size: 0.875rem;
    padding: 0.375rem 0.875rem;
    background: rgba(6, 182, 212, 0.1);
    border-radius: 6px;
}

.publication-description {
    color: #4b5563;
    line-height: 1.7;
    margin-top: 1rem;
}

/* Previous Labs Section */
.previous-labs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.previous-lab-card {
    background: white;
    border-radius: 16px;
    padding: 2rem;
    box-shadow: var(--card-shadow);
    transition: all 0.3s ease;
    position: relative;
    border-left: 4px solid var(--accent);
}

.previous-lab-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.previous-lab-card h4 {
    color: var(--primary);
    font-size: 1.3rem;
    margin-bottom: 1rem;
}

.previous-lab-card p {
    line-height: 1.7;
    color: var(--text-light);
    margin-bottom: 0.5rem;
}

.previous-lab-card strong {
    color: var(--secondary);
    font-size: 1.05rem;
}

.lab-link-small {
    display: inline-block;
    margin-top: 1rem;
    padding: 0.375rem 0.75rem;
    background: rgba(102, 126, 234, 0.1);
    color: var(--accent);
    text-decoration: none;
    border-radius: 6px;
    transition: all 0.3s ease;
    font-size: 0.9rem;
    font-weight: 500;
}

.lab-link-small:hover {
    background: rgba(102, 126, 234, 0.2);
    transform: translateX(3px);
}

/* Scholarships Section */
.scholarships-container {
    margin-top: 3rem;
}

.scholarship-card {
    background: white;
    border-radius: 20px;
    padding: 2.5rem;
    box-shadow: var(--card-shadow);
    position: relative;
    overflow: hidden;
}

.scholarship-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 5px;
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
}

.scholarship-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.scholarship-header h3 {
    font-size: 1.8rem;
    color: var(--secondary);
    margin: 0;
}

.funding-amount {
    font-size: 1.5rem;
    font-weight: 700;
    color: #10b981;
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.scholarship-details p {
    margin-bottom: 0.75rem;
    line-height: 1.7;
    color: var(--text-light);
}

.scholarship-details strong {
    color: var(--secondary);
    font-weight: 600;
}

.scholarship-description {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid #e5e7eb;
    color: #4b5563;
    line-height: 1.8;
}

/* Teaching Experience Section */
.teaching-container {
    margin-top: 3rem;
}

.teaching-card {
    background: white;
    border-radius: 20px;
    padding: 2.5rem;
    box-shadow: var(--card-shadow);
    position: relative;
    overflow: hidden;
    margin-bottom: 2rem;
}

.teaching-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 5px;
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
}

.teaching-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.teaching-header h3 {
    font-size: 1.6rem;
    color: var(--secondary);
    margin: 0;
}

.department {
    font-size: 1.1rem;
    color: #f59e0b;
    font-weight: 500;
}

.courses-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.course-item {
    display: grid;
    grid-template-columns: 100px 1fr;
    gap: 1.5rem;
    padding: 1.5rem;
    background: #f9fafb;
    border-radius: 12px;
    transition: all 0.3s ease;
}

.course-item:hover {
    background: #f3f4f6;
    transform: translateX(5px);
}

.course-code {
    font-size: 1.1rem;
    font-weight: 700;
    color: #f59e0b;
    text-align: center;
    padding: 0.5rem;
    background: white;
    border-radius: 8px;
    height: fit-content;
    border: 2px solid #fed7aa;
}

.course-details h4 {
    color: var(--secondary);
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

.course-term {
    color: var(--accent);
    font-weight: 600;
    font-size: 0.95rem;
    margin-bottom: 0.5rem;
}

.course-description {
    color: var(--text-light);
    line-height: 1.6;
    font-size: 0.95rem;
}

/* Timeline */
.timeline {
    position: relative;
    padding: 2rem 0;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    height: 100%;
    background: linear-gradient(to bottom, #667eea, #764ba2);
}

.timeline-item {
    position: relative;
    margin: 2rem 0;
    display: flex;
    align-items: center;
}

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

.timeline-content {
    width: 45%;
    background: white;
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: var(--card-shadow);
    transition: transform 0.3s ease;
}

.timeline-content:hover {
    transform: scale(1.02);
}

.timeline-dot {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 20px;
    background: white;
    border: 4px solid var(--accent);
    border-radius: 50%;
    z-index: 1;
}

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

/* Skills Section */
.skills-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.skill-category {
    background: white;
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

.skill-category h3 {
    color: var(--primary);
    margin-bottom: 1rem;
    font-size: 1.25rem;
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.skill-tag {
    padding: 0.375rem 0.75rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 6px;
    font-size: 0.875rem;
    transition: transform 0.2s ease;
}

.skill-tag:hover {
    transform: scale(1.05);
}

/* Contact Section */
.contact {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 20px;
    padding: 3rem;
    color: white;
    text-align: center;
    margin-top: 4rem;
}

.contact h2 {
    color: white;
    margin-bottom: 2rem;
}

.contact-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.contact-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: rgba(255, 255, 255, 0.2);
    color: white;
    text-decoration: none;
    border-radius: 8px;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.contact-link:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
}

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

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

/* Scroll animations */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-text h1 {
        font-size: 2.5rem;
    }

    .timeline::before {
        left: 30px;
    }

    .timeline-item {
        flex-direction: column !important;
        margin-left: 60px;
    }

    .timeline-content {
        width: 100%;
    }

    .timeline-dot {
        left: 30px;
    }

    .nav-links {
        display: none;
    }

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

    .skills-container {
        grid-template-columns: 1fr;
    }

    .lab-info {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .lab-card {
        padding: 2rem 1.5rem;
    }

    .scholarship-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .teaching-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .course-item {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .course-code {
        width: fit-content;
    }

    .contact-links {
        flex-direction: column;
        align-items: center;
    }

    .contact-link {
        width: 100%;
        max-width: 300px;
        justify-content: center;
    }
}