:root {
  --bg: #fbfbf9;
  --text: #1c1c1a;
  --muted: #5f5f5a;
  --link: #1d5bbf;
  --rule: #e2e2dc;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #161615;
    --text: #ececea;
    --muted: #a3a39d;
    --link: #8db4f5;
    --rule: #33332f;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}
main { max-width: 40rem; margin: 0 auto; padding: 3rem 1rem 4rem; }
h1 { font-size: 2rem; line-height: 1.2; margin: 0 0 0.75rem; }
h2 { font-size: 1.15rem; margin: 2rem 0 0.5rem; }
.lede { color: var(--muted); font-size: 1.05rem; }
a { color: var(--link); }
code { font-size: 0.9em; word-break: break-all; }
ul { padding-left: 1.25rem; }
footer { margin-top: 3rem; padding-top: 1rem; border-top: 1px solid var(--rule); color: var(--muted); font-size: 0.95rem; }