:root {
  --bg: #0f172a;
  --card: #1e293b;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --accent: #38bdf8;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, Segoe UI, Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

.site-header {
  padding: 4rem 1.5rem 3rem;
  text-align: center;
  border-bottom: 1px solid #334155;
}

.site-header h1 {
  margin: 0 0 0.5rem;
  font-size: 2.5rem;
  color: var(--accent);
}

.site-header p { margin: 0; color: var(--muted); }

main {
  max-width: 640px;
  margin: 2.5rem auto;
  padding: 0 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.card {
  background: var(--card);
  border-radius: 12px;
  padding: 1.75rem;
  border: 1px solid #334155;
}

.card h2 { margin-top: 0; font-size: 1.25rem; }
.card p { margin-bottom: 0; color: var(--text); }

footer {
  text-align: center;
  color: var(--muted);
  padding: 2.5rem 1rem 3rem;
  font-size: 0.85rem;
}