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

:root {
    --primary: #0051A5;
    --primary-dark: #003D7A;
    --secondary: #00B4D8;
    --text: #1A1A1A;
    --text-light: #666666;
    --bg: #FFFFFF;
    --bg-alt: #F8F9FA;
    --border: #E5E7EB;
    --shadow: rgba(0, 0, 0, 0.1);
    --shadow-lg: rgba(0, 0, 0, 0.15);
}

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

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

/* Navigation */
.nav {
    position: sticky;
    top: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    z-index: 1000;
    box-shadow: 0 2px 4px var(--shadow);
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    text-decoration: none;
}

.nav-links {
    display: flex;
    gap: 2rem;
}

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

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

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
}

.mobile-menu-btn span {
    width: 25px;
    height: 3px;
    background: var(--text);
    transition: 0.3s;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    padding: 4rem 0;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.hero-content {
    text-align: left;
}

.hero-title {
    font-size: 2.75rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.125rem;
    margin-bottom: 2rem;
    opacity: 0.95;
    line-height: 1.7;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.hero-image {
    position: relative;
    animation: fadeInUp 1s ease-out;
}

.hero-image img {
    width: 100%;
    height: auto;
    border-radius: 16px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

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

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.875rem 2rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
    border: 2px solid transparent;
}

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

.btn-primary:hover {
    background: #0096B8;
    transform: translateY(-2px);
    box-shadow: 0 8px 16px var(--shadow-lg);
}

.btn-secondary {
    background: transparent;
    color: white;
    border-color: white;
}

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

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

.btn-large {
    padding: 1.125rem 2.5rem;
    font-size: 1.125rem;
}

/* Stats Section */
.stats {
    background: var(--bg-alt);
    padding: 3rem 0;
}

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

.stat-card {
    text-align: center;
    padding: 2rem;
    background: white;
    border-radius: 12px;
    box-shadow: 0 4px 6px var(--shadow);
}

.stat-number {
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 1rem;
    color: var(--text-light);
    font-weight: 500;
}

/* Sections */
.section {
    padding: 5rem 0;
}

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

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

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--primary);
}

.section-subtitle {
    font-size: 1.25rem;
    color: var(--text-light);
}

/* About Section */
.about-content {
    max-width: 900px;
    margin: 0 auto;
}

.about-text p {
    margin-bottom: 1.5rem;
    font-size: 1.125rem;
}

.about-text h3 {
    margin-top: 2rem;
    margin-bottom: 1rem;
    color: var(--primary);
    font-size: 1.75rem;
}

.mission-list {
    list-style: none;
    padding: 0;
}

.mission-list li {
    padding: 1rem;
    margin-bottom: 1rem;
    background: white;
    border-left: 4px solid var(--secondary);
    border-radius: 8px;
    box-shadow: 0 2px 4px var(--shadow);
}

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

.research-card {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px var(--shadow);
    transition: transform 0.3s, box-shadow 0.3s;
}

.research-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 16px var(--shadow-lg);
}

.research-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

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

.research-card ul {
    margin-top: 1rem;
    padding-left: 1.5rem;
}

.research-card li {
    margin-bottom: 0.5rem;
}

/* Team Section */
.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.team-card {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px var(--shadow);
    text-align: center;
    transition: transform 0.3s;
}

.team-card:hover {
    transform: translateY(-4px);
}

.team-card h3 {
    color: var(--primary);
    margin-bottom: 0.5rem;
    font-size: 1.25rem;
}

.team-role {
    font-weight: 600;
    color: var(--secondary);
    margin-bottom: 0.25rem;
}

.team-affiliation {
    color: var(--text-light);
    font-size: 0.875rem;
}

.team-note {
    text-align: center;
    margin-top: 2rem;
    font-style: italic;
    color: var(--text-light);
}

/* Publications Section */
.publications {
    max-width: 900px;
    margin: 0 auto;
}

.publication-card {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px var(--shadow);
    margin-bottom: 2rem;
    position: relative;
}

.publication-card.featured {
    border: 2px solid var(--secondary);
}

.publication-badge {
    position: absolute;
    top: -12px;
    right: 2rem;
    background: var(--secondary);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
}

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

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

.publication-journal {
    font-weight: 600;
    color: var(--text);
    margin-bottom: 1rem;
}

.publication-abstract {
    margin: 1.5rem 0;
    line-height: 1.7;
}

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

/* Consortium Section */
.consortium-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.consortium-content > p {
    font-size: 1.25rem;
    margin-bottom: 2rem;
}

.consortium-benefits {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px var(--shadow);
    margin: 2rem 0;
    text-align: left;
}

.consortium-benefits h3 {
    color: var(--primary);
    margin-bottom: 1rem;
}

.consortium-benefits ul {
    list-style: none;
    padding: 0;
}

.consortium-benefits li {
    padding: 0.75rem 0;
    padding-left: 2rem;
    position: relative;
}

.consortium-benefits li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--secondary);
    font-weight: bold;
    font-size: 1.25rem;
}

.consortium-cta {
    margin-top: 3rem;
}

/* Contact Section */
.contact-content {
    max-width: 600px;
    margin: 0 auto;
}

.contact-info {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px var(--shadow);
    margin-bottom: 2rem;
}

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

.contact-info p {
    margin-bottom: 0.75rem;
}

.contact-info a {
    color: var(--secondary);
    text-decoration: none;
}

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

.philanthropy-note {
    text-align: center;
    padding: 1.5rem;
    background: white;
    border-radius: 12px;
    box-shadow: 0 4px 6px var(--shadow);
    border-left: 4px solid var(--secondary);
}

.philanthropy-note p {
    color: var(--text-light);
    font-size: 1rem;
    line-height: 1.6;
}

.philanthropy-note strong {
    color: var(--primary);
    font-size: 1.125rem;
}

/* Footer */
.footer {
    background: var(--text);
    color: white;
    padding: 3rem 0 1rem;
}

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

.footer-section h4 {
    margin-bottom: 1rem;
    color: var(--secondary);
}

.footer-section a {
    display: block;
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    margin-bottom: 0.5rem;
    transition: color 0.3s;
}

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

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.6);
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .mobile-menu-btn {
        display: flex;
    }

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

    .hero-content {
        text-align: center;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1.125rem;
    }

    .hero-actions {
        justify-content: center;
    }

    .section-title {
        font-size: 2rem;
    }

    .stat-number {
        font-size: 2.5rem;
    }

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

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

/* Selection */
::selection {
    background: var(--secondary);
    color: white;
}