:root {
  --bg: #0d1117;
  --surface: #161b22;
  --border: #30363d;
  --text: #e6edf3;
  --muted: #9198a1;
  --accent: #4493f8;
  --radius: 8px;
  --maxw: 860px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

.site-header {
  padding: 3rem 1.25rem 2rem;
  border-bottom: 1px solid var(--border);
  text-align: center;
}

.site-header h1 {
  margin: 0;
  font-size: 2.25rem;
  letter-spacing: -0.02em;
}

.tagline {
  margin: 0.5rem 0 0;
  color: var(--muted);
}

.container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 2rem 1.25rem;
}

section { margin-bottom: 2.5rem; }

section h2 {
  font-size: 1.25rem;
  margin: 0 0 0.25rem;
}

.section-note {
  margin: 0 0 1rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.card-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.75rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.15rem;
}

.card a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
}

.card a:hover { text-decoration: underline; }

.card p {
  margin: 0.35rem 0 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.card--empty {
  border-style: dashed;
  text-align: center;
}

.card--empty p { color: var(--muted); }

code {
  background: rgba(110, 118, 129, 0.2);
  padding: 0.1rem 0.35rem;
  border-radius: 4px;
  font-size: 0.85em;
}

.site-footer {
  border-top: 1px solid var(--border);
  padding: 1.5rem;
  text-align: center;
  color: var(--muted);
  font-size: 0.85rem;
}