:root {
  color-scheme: light dark;
  --bg: #fbfaf7;
  --ink: #1d1f24;
  --muted: #5d626c;
  --link: #1f5fbf;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #15171b;
    --ink: #e6e4df;
    --muted: #a3a7ae;
    --link: #8ab4f8;
  }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 17px/1.6 system-ui, -apple-system, "Segoe UI", sans-serif;
}

main {
  max-width: 40rem;
  margin: 0 auto;
  padding: 3rem 1rem 4rem;
}

h1 { font-size: 1.9rem; line-height: 1.2; margin: 0.5rem 0 1rem; }
h2 { font-size: 1.15rem; margin: 2rem 0 0.5rem; }
a { color: var(--link); }
code { font-size: 0.9em; }
.meta { color: var(--muted); margin-top: -0.5rem; }