:root {
  --bg: #ffffff;
  --text: #1f2328;
  --muted: #59636e;
  --link: #0969da;
  --code-bg: #eff2f5;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d1117;
    --text: #e6edf3;
    --muted: #9198a1;
    --link: #4493f8;
    --code-bg: #262c36;
  }
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
main {
  max-width: 42rem;
  margin: 0 auto;
  padding: 2.5rem 16px 4rem;
}
h1 { font-size: 1.9rem; line-height: 1.25; margin: 0.5rem 0 1rem; }
h2 { font-size: 1.2rem; margin: 2rem 0 0.5rem; }
a { color: var(--link); }
.muted { color: var(--muted); margin-top: -0.5rem; }
code {
  background: var(--code-bg);
  padding: 0.1em 0.35em;
  border-radius: 4px;
  font-size: 0.9em;
}
ul { padding-left: 1.25rem; }
li { margin: 0.3rem 0; }