:root {
    --primary-color: #2563eb;
    --secondary-color: #64748b;
    --success-color: #16a34a;
    --background: #f8fafc;
    --surface: #ffffff;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --border: #e2e8f0;
}

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

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

header {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    padding: 1rem 2rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

header h1 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    font-size: 1.5rem;
}

nav a {
    color: var(--text-secondary);
    text-decoration: none;
    margin-right: 2rem;
    font-weight: 500;
    transition: color 0.2s;
}

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

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

section {
    background: var(--surface);
    border-radius: 8px;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

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

.metric-card {
    background: var(--background);
    padding: 1.5rem;
    border-radius: 6px;
    border: 1px solid var(--border);
    text-align: center;
}

.metric-card h3 {
    color: var(--text-secondary);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.5rem;
}

.metric-card div {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

.benchmark-section, .coverage-section, .flamegraph-section {
    margin-top: 2rem;
}

.benchmark-section canvas {
    margin-top: 1rem;
    max-height: 400px;
}

.flamegraph-section {
    padding: 1.5rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
}

.docs-link {
    display: inline-block;
    background: var(--primary-color);
    color: white;
    padding: 0.75rem 1.5rem;
    text-decoration: none;
    border-radius: 6px;
    font-weight: 500;
    transition: background 0.2s;
}

.docs-link:hover {
    background: #1d4ed8;
}

footer {
    text-align: center;
    padding: 2rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

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

@media (max-width: 768px) {
    main {
        padding: 1rem;
    }

    header {
        padding: 1rem;
    }

    nav a {
        display: block;
        margin: 0.5rem 0;
    }

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