:root {
  --bg: #ffffff;
  --fg: #1c1c1e;
  --muted: #5f6368;
  --link: #0b57d0;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121212;
    --fg: #ececec;
    --muted: #a0a4a8;
    --link: #8ab4f8;
  }
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
main {
  max-width: 44rem;
  margin: 0 auto;
  padding: 2rem 1rem 4rem;
}
h1 { line-height: 1.2; }
h2 { margin-top: 2rem; font-size: 1.15rem; }
a { color: var(--link); }
.meta { color: var(--muted); font-size: 0.9rem; }