:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --text: #1b1f24;
  --muted: #57606a;
  --accent: #1f6feb;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d1117;
    --text: #e6edf3;
    --muted: #9198a1;
    --accent: #4493f8;
  }
}
* {
  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: 760px;
  margin: 0 auto;
  padding: 24px 16px 48px;
}
h1 {
  font-size: 1.6rem;
  line-height: 1.3;
}
h2 {
  font-size: 1.2rem;
  margin-top: 2rem;
}
a {
  color: var(--accent);
}
.meta {
  color: var(--muted);
}