:root {
  --bg: #0f1419;
  --surface: #1a2332;
  --text: #e7ecf3;
  --muted: #8b9cb3;
  --accent: #3d9eff;
  --border: #2a3548;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  font: 16px/1.6 system-ui, -apple-system, Segoe UI, sans-serif;
  color: var(--text);
  background: radial-gradient(ellipse 80% 50% at 50% -20%, #1e3a5f 0%, var(--bg) 55%);
}

header, main, footer {
  max-width: 640px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

header { padding-top: 3.5rem; padding-bottom: 2rem; }

.eyebrow {
  margin: 0 0 0.5rem;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
}

h1 {
  margin: 0 0 0.5rem;
  font-size: clamp(1.75rem, 5vw, 2.25rem);
  font-weight: 700;
}

.lead { margin: 0; color: var(--muted); font-size: 1.05rem; }

main { display: grid; gap: 1rem; padding-bottom: 3rem; }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.25rem 1.5rem;
}

.card h2 {
  margin: 0 0 0.75rem;
  font-size: 1rem;
  font-weight: 600;
}

.card ul { margin: 0; padding-left: 1.25rem; color: var(--muted); }

.card li { margin: 0.35rem 0; }

code {
  font-size: 0.9em;
  background: #0d1117;
  padding: 0.15em 0.4em;
  border-radius: 4px;
  color: #7ee787;
}

a { color: var(--accent); }

.meta { margin: 0.75rem 0 0; font-size: 0.85rem; color: var(--muted); }

footer {
  padding: 2rem 1.5rem 3rem;
  text-align: center;
  font-size: 0.85rem;
  color: var(--muted);
  border-top: 1px solid var(--border);
}