:root {
  color-scheme: light dark;
  --bg: #fafaf9;
  --text: #1c1917;
  --muted: #57534e;
  --accent: #0f766e;
  --line: #e7e5e4;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #161618;
    --text: #e7e5e4;
    --muted: #a8a29e;
    --accent: #5eead4;
    --line: #2e2e33;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
main { max-width: 720px; margin: 0 auto; padding: 40px 16px 64px; }
h1 { font-size: 2rem; line-height: 1.2; margin: 0 0 8px; }
h2 { font-size: 1.15rem; margin: 32px 0 8px; }
section { border-top: 1px solid var(--line); margin-top: 32px; padding-top: 8px; }
.lead { color: var(--muted); font-size: 1.1rem; margin: 0; }
.meta { color: var(--muted); font-size: 0.9rem; }
a { color: var(--accent); }
ul { padding-left: 20px; }
li { margin: 6px 0; }
footer {
  border-top: 1px solid var(--line);
  margin-top: 40px;
  padding-top: 16px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  font-size: 0.95rem;
  color: var(--muted);
}