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

:root {
    --bg-dark: #0a0a0a;
    --bg-medium: #1a1a1a;
    --bg-light: #2a2a2a;
    --text-primary: #e0e0e0;
    --text-secondary: #a0a0a0;
    --accent: #00d4ff;
    --accent-dim: #0088aa;
    --success: #00ff88;
    --warning: #ffaa00;
    --border: #333;
    --timeline-1: #ff6b6b;
    --timeline-2: #4ecdc4;
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navigation */
.main-nav {
    background-color: var(--bg-medium);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 60px;
}

.logo a {
    color: var(--accent);
    text-decoration: none;
    font-weight: 600;
    font-size: 1.2rem;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav-menu a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--accent);
}

/* Hero Section */
.hero {
    padding: 80px 0 60px;
    text-align: center;
    background: linear-gradient(180deg, var(--bg-dark) 0%, var(--bg-medium) 100%);
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 20px;
    color: var(--accent);
}

.subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    max-width: 800px;
    margin: 0 auto;
}

/* Section Styles */
section {
    padding: 60px 0;
}

section h2 {
    font-size: 2rem;
    margin-bottom: 30px;
    color: var(--accent);
}

section p {
    margin-bottom: 20px;
    color: var(--text-secondary);
}

/* Results Grid */
.results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.result-card {
    background-color: var(--bg-light);
    padding: 30px;
    border-radius: 8px;
    border: 1px solid var(--border);
}

.result-card h3 {
    color: var(--accent);
    margin-bottom: 15px;
}

/* Timeline Preview */
.timeline-preview {
    background-color: var(--bg-medium);
}

.timeline-explanation {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    margin: 40px 0;
}

.timeline-col {
    background-color: var(--bg-light);
    padding: 30px;
    border-radius: 8px;
    border: 2px solid var(--border);
}

.timeline-col:first-child {
    border-left: 4px solid var(--timeline-1);
}

.timeline-col:last-child {
    border-left: 4px solid var(--timeline-2);
}

.timeline-col h3 {
    color: var(--accent);
    margin-bottom: 15px;
}

.timeline-note {
    text-align: center;
    font-size: 1.1rem;
    margin: 30px 0;
    color: var(--text-primary);
}

.timeline-note strong {
    color: var(--success);
}

.timeline-note-future {
    text-align: center;
    font-style: italic;
    color: var(--text-secondary);
    margin-top: 20px;
}

/* Approach Grid */
.approach {
    background-color: var(--bg-medium);
}

.approach-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.approach-card {
    background-color: var(--bg-dark);
    padding: 30px;
    border-radius: 8px;
    border: 1px solid var(--border);
    transition: border-color 0.3s;
}

.approach-card:hover {
    border-color: var(--accent);
}

.approach-card h3 {
    color: var(--accent);
    margin-bottom: 15px;
}

/* Diagnosis List */
.diagnosis-list {
    margin-top: 40px;
}

.diagnosis-item {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 20px;
    background-color: var(--bg-light);
    border-radius: 8px;
    margin-bottom: 15px;
    border: 1px solid var(--border);
}

.diagnosis {
    color: var(--warning);
    font-weight: 500;
    flex: 1;
}

.arrow {
    color: var(--accent);
    font-size: 1.5rem;
}

.capability {
    color: var(--success);
    font-weight: 500;
    flex: 1;
}

/* Publications */
.pub-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.pub-card {
    background-color: var(--bg-light);
    padding: 30px;
    border-radius: 8px;
    border: 1px solid var(--border);
}

.pub-card h3 {
    color: var(--accent);
    margin-bottom: 10px;
}

.pub-meta {
    margin-top: 15px;
    color: var(--text-secondary);
}

.pub-meta a {
    color: var(--accent);
    text-decoration: none;
}

.pub-meta a:hover {
    text-decoration: underline;
}

/* CTA Section */
.cta-section {
    background-color: var(--bg-medium);
    text-align: center;
}

.cta-button,
.cta-button-large {
    display: inline-block;
    padding: 15px 40px;
    background-color: var(--accent);
    color: var(--bg-dark);
    text-decoration: none;
    border-radius: 5px;
    font-weight: 600;
    transition: background-color 0.3s;
    margin-top: 20px;
}

.cta-button-large {
    padding: 20px 60px;
    font-size: 1.2rem;
}

.cta-button:hover,
.cta-button-large:hover {
    background-color: var(--accent-dim);
}

/* Footer */
footer {
    background-color: var(--bg-medium);
    border-top: 1px solid var(--border);
    padding: 40px 0;
    text-align: center;
}

footer p {
    color: var(--text-secondary);
    margin-bottom: 10px;
}

footer a {
    color: var(--accent);
    text-decoration: none;
}

footer a:hover {
    text-decoration: underline;
}

/* Responsive */
@media (max-width: 768px) {
    .nav-menu {
        gap: 15px;
        font-size: 0.9rem;
    }

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

    .timeline-explanation {
        grid-template-columns: 1fr;
    }

    .diagnosis-item {
        flex-direction: column;
        text-align: center;
    }

    .approach-grid,
    .results-grid,
    .pub-grid {
        grid-template-columns: 1fr;
    }
}