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

:root {
    --primary-color: #2563eb;
    --secondary-color: #1e40af;
    --text-dark: #1f2937;
    --text-gray: #6b7280;
    --bg-light: #f9fafb;
    --border-color: #e5e7eb;
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: #ffffff;
}

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

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: var(--secondary-color);
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow);
    z-index: 1000;
    padding: 1rem 0;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-dark);
}

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

.nav-menu a {
    color: var(--text-gray);
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-menu a:hover {
    color: var(--primary-color);
}

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

.hero-content {
    display: flex;
    align-items: center;
    gap: 3rem;
}

.hero-image img {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    object-fit: cover;
    border: 5px solid white;
    box-shadow: var(--shadow-lg);
}

.hero-text h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.hero-text .subtitle {
    font-size: 1.25rem;
    opacity: 0.95;
    margin-bottom: 0.5rem;
}

.hero-text .bio {
    font-size: 1rem;
    opacity: 0.9;
    margin-bottom: 1.5rem;
}

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

.social-links a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    color: white;
    font-size: 1.2rem;
    transition: all 0.3s ease;
}

.social-links a:hover {
    background-color: rgba(255, 255, 255, 0.3);
    transform: translateY(-3px);
}

/* Sections */
.section {
    padding: 4rem 0;
}

.section.bg-light {
    background-color: var(--bg-light);
}

.section-title {
    font-size: 2rem;
    margin-bottom: 2rem;
    color: var(--text-dark);
    position: relative;
    padding-bottom: 0.5rem;
}

.section-title::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 60px;
    height: 3px;
    background-color: var(--primary-color);
}

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

/* News Section */
.news-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.news-item {
    display: flex;
    gap: 1.5rem;
    padding: 1rem;
    background-color: white;
    border-radius: 8px;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.news-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.news-date {
    font-weight: 600;
    color: var(--primary-color);
    min-width: 100px;
}

.news-content {
    flex: 1;
    color: var(--text-gray);
}

/* Publications Section */
.publication-item {
    display: flex;
    gap: 2rem;
    margin-bottom: 2.5rem;
    padding: 1.5rem;
    background-color: white;
    border-radius: 12px;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.publication-item:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.pub-image {
    position: relative;
    min-width: 250px;
    max-width: 250px;
}

.pub-image img {
    width: 100%;
    height: auto;
    border-radius: 8px;
    box-shadow: var(--shadow);
}

.pub-badge {
    position: absolute;
    top: 10px;
    left: 10px;
    background-color: var(--primary-color);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 4px;
    font-size: 0.875rem;
    font-weight: 600;
}

.pub-content {
    flex: 1;
}

.pub-title {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
    line-height: 1.4;
}

.pub-authors {
    color: var(--text-gray);
    margin-bottom: 1rem;
    line-height: 1.6;
}

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

.pub-links a {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background-color: var(--bg-light);
    border-radius: 6px;
    font-size: 0.875rem;
    font-weight: 500;
    transition: all 0.3s ease;
}

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

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

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

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

.timeline-item::before {
    content: '';
    position: absolute;
    left: -2rem;
    top: 0.5rem;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: var(--primary-color);
    border: 3px solid white;
    box-shadow: 0 0 0 3px var(--bg-light);
}

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

.timeline-content h3 {
    font-size: 1.125rem;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.timeline-content p {
    color: var(--text-gray);
}

/* Awards Grid */
.awards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.award-item {
    display: flex;
    flex-direction: column;
    padding: 1.5rem;
    background-color: white;
    border-radius: 8px;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.award-item:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

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

.award-name {
    color: var(--text-gray);
    line-height: 1.6;
}

/* Education */
.education-list {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.education-item {
    display: flex;
    gap: 2rem;
    padding: 1.5rem;
    background-color: white;
    border-radius: 12px;
    box-shadow: var(--shadow);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.education-item:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.edu-period {
    font-weight: 600;
    color: var(--primary-color);
    min-width: 150px;
}

.edu-content h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.edu-degree {
    font-weight: 600;
    color: var(--text-gray);
    margin-bottom: 0.25rem;
}

.edu-major {
    color: var(--text-gray);
    margin-bottom: 0.25rem;
}

.edu-location {
    color: var(--text-gray);
    font-style: italic;
}

/* Contact */
.contact-info {
    max-width: 800px;
}

.contact-info p {
    margin-bottom: 1rem;
    color: var(--text-gray);
}

.contact-info h3 {
    color: var(--text-dark);
    margin-bottom: 1rem;
}

/* Footer */
.footer {
    background-color: var(--text-dark);
    color: white;
    padding: 2rem 0;
    text-align: center;
}

.footer p {
    margin-bottom: 0.5rem;
    opacity: 0.8;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 0 1rem;
    }

    .nav-menu {
        display: none;
    }

    .hero-content {
        flex-direction: column;
        text-align: center;
    }

    .hero-text h1 {
        font-size: 2rem;
    }

    .hero-image img {
        width: 150px;
        height: 150px;
    }

    .publication-item {
        flex-direction: column;
    }

    .pub-image {
        min-width: 100%;
        max-width: 100%;
    }

    .education-item {
        flex-direction: column;
    }

    .edu-period {
        min-width: auto;
    }

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

    .section-title {
        font-size: 1.5rem;
    }
}

@media (max-width: 480px) {
    .hero-text h1 {
        font-size: 1.5rem;
    }

    .hero-text .subtitle {
        font-size: 1rem;
    }

    .social-links a {
        width: 35px;
        height: 35px;
        font-size: 1rem;
    }
}