:root {
    --bg-primary: #0b0f19;
    --bg-surface: #111827;
    --bg-card: #1f2937;
    --border: #374151;
    --text-main: #f9fafb;
    --text-muted: #9ca3af;
    --accent: #2563eb;
    --accent-hover: #1d4ed8;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-main);
    line-height: 1.5;
    padding: 2rem 1rem;
}

.container { max-width: 1100px; margin: 0 auto; }
.header { margin-bottom: 3rem; text-align: center; }
.brand { color: var(--accent); font-weight: 700; text-transform: uppercase; letter-spacing: 0.05em; font-size: 0.875rem; }
.title { font-size: 2.25rem; font-weight: 800; margin-top: 0.5rem; }
.subtitle { color: var(--text-muted); margin-top: 0.5rem; }

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.5rem;
}

.card {
    background-color: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 0.75rem;
    padding: 1.75rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: transform 0.2s, border-color 0.2s;
}
.card:hover {
    transform: translateY(-2px);
    border-color: var(--accent);
}
.card-title { font-size: 1.25rem; font-weight: 600; margin-bottom: 0.5rem; }
.card-desc { color: var(--text-muted); font-size: 0.9rem; margin-bottom: 1.5rem; }

.btn {
    display: inline-block;
    background-color: var(--accent);
    color: #fff;
    padding: 0.625rem 1.25rem;
    border-radius: 0.375rem;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.875rem;
    text-align: center;
}
.btn:hover { background-color: var(--accent-hover); }