/* Root Variables */
:root {
    --color-bg-primary: #0f1419;
    --color-bg-secondary: #1a1f27;
    --color-bg-tertiary: #252d38;
    --color-text-primary: #e8eaed;
    --color-text-secondary: #b0b3b8;
    --color-accent: #4a9eff;
    --color-accent-hover: #6aadff;
    --color-border: #333842;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
}

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

html {
    scroll-behavior: smooth;
}

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

/* Navigation */
nav {
    position: sticky;
    top: 0;
    background-color: rgba(15, 20, 25, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    padding: var(--spacing-md) var(--spacing-lg);
    z-index: 1000;
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-accent);
    text-decoration: none;
}

nav ul {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
}

nav a {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 0.95rem;
    transition: color 0.3s ease;
}

nav a:hover {
    color: var(--color-accent);
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--color-accent);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0;
}

/* Hero Section */
.hero {
    padding: var(--spacing-xl) var(--spacing-lg);
    background: linear-gradient(135deg, rgba(26, 31, 39, 0.9) 0%, rgba(37, 45, 56, 0.9) 100%);
    		url('images/hero-brain.png') center/cover no-repeat;
    border-bottom: 1px solid var(--color-border);
    min-height: 600px;
    display: flex;
    align-items: center;
}

.hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background: url("images/hero-bg.jpg") center/cover no-repeat;
    opacity: 0.25;
    z-index: -1;
}

.hero .container {
    position: relative;
    max-width: 1200px;
    margin: 0 auto;
}

.hero-grid {
    display: grid;
    grid-template-columns: minmax(0, 3fr) minmax(0, 2fr);
    gap: var(--spacing-xl);
    align-items: center;
}

.hero-content {
    z-index: 10;
}

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-image img {
    max-width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6);
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
}

.hero .tagline {
    font-size: 1.25rem;
    color: var(--color-accent);
    margin-bottom: var(--spacing-lg);
    font-weight: 500;
}

.hero p {
    font-size: 1.05rem;
    color: var(--color-text-secondary);
    max-width: 700px;
    margin-bottom: var(--spacing-xl);
    line-height: 1.8;
}

/* Buttons */
.cta-buttons {
    display: flex;
    gap: var(--spacing-md);
}

.btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
    font-weight: 500;
}

.btn-primary {
    background-color: var(--color-accent);
    color: var(--color-bg-primary);
}

.btn-primary:hover {
    background-color: var(--color-accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(74, 158, 255, 0.4);
}

.btn-secondary {
    background-color: transparent;
    color: var(--color-accent);
    border: 2px solid var(--color-accent);
}

.btn-secondary:hover {
    background-color: rgba(74, 158, 255, 0.1);
}

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

/* Sections */
section {
    padding: var(--spacing-xl) var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
}

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

h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    color: var(--color-text-primary);
}

h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--color-text-primary);
}

.section-intro {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
}

/* About Section */
.about-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: var(--spacing-xl);
    align-items: flex-start;
}

.about-text p {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
    font-size: 1.05rem;
    line-height: 1.8;
}

.research-focus {
    background-color: var(--color-bg-secondary);
    padding: var(--spacing-lg);
    border-radius: 8px;
    border-left: 4px solid var(--color-accent);
}

.research-focus h4 {
    color: var(--color-accent);
    margin-bottom: var(--spacing-sm);
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 1px;
}

.research-focus p {
    color: var(--color-text-secondary);
    margin-bottom: 0;
}

/* Research Areas */
.research-areas {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.research-card {
    background-color: var(--color-bg-secondary);
    padding: var(--spacing-lg);
    border-radius: 8px;
    border: 1px solid var(--color-border);
    transition: all 0.3s ease;
}

.research-card:hover {
    border-color: var(--color-accent);
    background-color: var(--color-bg-tertiary);
    transform: translateY(-4px);
}

.research-card h4 {
    color: var(--color-accent);
    margin-bottom: var(--spacing-sm);
    font-size: 1.1rem;
}

.research-card p {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* Team Section */
.team-members {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.team-card {
    background-color: var(--color-bg-secondary);
    padding: var(--spacing-lg);
    border-radius: 8px;
    border: 1px solid var(--color-border);
    text-align: center;
}

.team-card-image {
    width: 120px;
    height: 120px;
    margin: 0 auto var(--spacing-md);
    border-radius: 50%;
    overflow: hidden;
    border: 3px solid var(--color-accent);
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-bg-tertiary);
}

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

.team-card .name {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-xs);
}

.team-card .role {
    color: var(--color-accent);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--spacing-sm);
}

.team-card .bio {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
    margin-bottom: var(--spacing-sm);
}

.team-links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
}

.team-links a {
    color: var(--color-accent);
    text-decoration: none;
    font-size: 0.9rem;
    padding: var(--spacing-xs) var(--spacing-sm);
    border: 1px solid var(--color-border);
    border-radius: 4px;
    transition: all 0.3s ease;
}

.team-links a:hover {
    background-color: rgba(74, 158, 255, 0.1);
    border-color: var(--color-accent);
}

/* Projects Section */
.projects-list {
    margin-top: var(--spacing-lg);
}

.project-item {
    background-color: var(--color-bg-secondary);
    padding: var(--spacing-lg);
    border-radius: 8px;
    border: 1px solid var(--color-border);
    margin-bottom: var(--spacing-lg);
}

.project-title {
    color: var(--color-accent);
    font-size: 1.15rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.project-funding {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-sm);
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.project-description {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* Publications Section */
.pub-links {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.pub-list {
    display: grid;
    gap: var(--spacing-lg);
}

.pub-card {
    background-color: var(--color-bg-secondary);
    padding: var(--spacing-lg);
    border-radius: 8px;
    border: 1px solid var(--color-border);
}

.pub-year {
    color: var(--color-accent);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.pub-title {
    color: var(--color-text-primary);
    font-weight: 500;
    margin-bottom: var(--spacing-sm);
    line-height: 1.6;
}

.pub-authors,
.pub-note {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-sm);
}

.pub-link {
    color: var(--color-accent);
    text-decoration: none;
    font-size: 0.9rem;
}

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

/* Contact Section */
.contact-content {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--spacing-xl);
}

.contact-info,
.contact-form {
    background-color: var(--color-bg-secondary);
    padding: var(--spacing-lg);
    border-radius: 8px;
    border: 1px solid var(--color-border);
}

.contact-info h4,
.contact-form h4 {
    color: var(--color-accent);
    margin-bottom: var(--spacing-md);
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 1px;
}

.contact-subheading {
    margin-top: var(--spacing-lg);
}

.contact-info p {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-sm);
    font-size: 0.95rem;
}

.contact-info a {
    color: var(--color-accent);
    text-decoration: none;
    transition: color 0.3s ease;
}

.contact-info a:hover {
    color: var(--color-accent-hover);
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-text-primary);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: var(--spacing-sm);
    background-color: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: 4px;
    color: var(--color-text-primary);
    font-family: inherit;
    font-size: 0.95rem;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-accent);
}

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

/* Footer */
footer {
    background-color: var(--color-bg-secondary);
    padding: var(--spacing-lg);
    text-align: center;
    border-top: 1px solid var(--color-border);
}

footer p {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
}

/* Utility */
.text-muted {
    color: var(--color-text-secondary);
}

.accent-text {
    color: var(--color-accent);
}

/* Responsive Styles */
@media (max-width: 1024px) {
    .research-areas {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .team-members {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 768px) {
    .menu-toggle {
        display: block;
    }

    nav ul {
        position: absolute;
        top: 60px;
        left: 0;
        right: 0;
        flex-direction: column;
        background-color: var(--color-bg-secondary);
        gap: 0;
        display: none;
        padding: var(--spacing-lg) 0;
        border-bottom: 1px solid var(--color-border);
        z-index: 999;
    }

    nav ul.active {
        display: flex;
    }

    nav ul li {
        padding: var(--spacing-sm) var(--spacing-lg);
        border-bottom: 1px solid var(--color-border);
    }

    nav ul li:last-child {
        border-bottom: none;
    }

    nav a {
        font-size: 1rem;
    }

    .hero {
        padding-top: var(--spacing-lg);
        padding-bottom: var(--spacing-lg);
        min-height: auto;
    }

    .hero-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }

    .hero h1 {
        font-size: 2.4rem;
    }

    .hero p {
        font-size: 0.95rem;
    }

    .hero .tagline {
        font-size: 1rem;
    }

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

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

    .about-content {
        grid-template-columns: 1fr;
    }

    .about-text p {
        font-size: 0.95rem;
    }

    .research-areas {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .research-card {
        padding: var(--spacing-md);
    }

    .team-members {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .team-card {
        padding: var(--spacing-md);
    }

    .team-card .bio {
        font-size: 0.85rem;
    }

    .projects-list .project-item {
        padding: var(--spacing-md);
    }

    .project-title {
        font-size: 1.05rem;
    }

    .project-funding {
        flex-direction: column;
        gap: var(--spacing-sm);
    }

    .contact-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }

    .contact-info,
    .contact-form {
        padding: var(--spacing-md);
    }

    .pub-links {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 2rem;
    }

    .hero .tagline {
        font-size: 0.9rem;
    }

    .research-areas {
        gap: var(--spacing-sm);
    }

    .research-card h4 {
        font-size: 1rem;
    }

    .research-card p {
        font-size: 0.9rem;
    }

    .team-members {
        gap: var(--spacing-sm);
    }

    .team-card .name {
        font-size: 1rem;
    }

    .team-card .role {
        font-size: 0.8rem;
    }

    .team-links {
        flex-wrap: wrap;
    }

    .team-links a {
        flex: 1 1 auto;
        min-width: 80px;
        font-size: 0.8rem;
        padding: var(--spacing-xs) var(--spacing-sm);
    }

    .project-funding span {
        font-size: 0.85rem;
    }

    .project-description {
        font-size: 0.9rem;
    }

    .contact-info h4,
    .contact-form h4 {
        font-size: 0.8rem;
    }

    .contact-info p,
    .contact-form p {
        font-size: 0.9rem;
    }

    .form-group input,
    .form-group textarea {
        padding: var(--spacing-sm);
        font-size: 1rem;
    }
}

/* Print */
@media print {
    nav,
    footer {
        display: none;
    }
}