:root {
  --bg: #fbfbf9;
  --text: #1d1d1b;
  --muted: #5d5d58;
  --rule: #e2e1dc;
  --link: #1f5fa8;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #161615; --text: #ecebe6; --muted: #a7a6a0; --rule: #33332f; --link: #8ab8ee; }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.65 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
header, main, footer { max-width: 44rem; margin: 0 auto; padding: 0 1rem; }
header {
  display: flex; flex-wrap: wrap; gap: .5rem 1.5rem; align-items: baseline; justify-content: space-between;
  padding-top: 1.25rem; padding-bottom: 1rem; border-bottom: 1px solid var(--rule);
}
.brand { margin: 0; font-weight: 600; }
nav { display: flex; gap: 1.25rem; }
nav a { color: var(--muted); text-decoration: none; }
nav a[aria-current="page"] { color: var(--text); }
main { padding-top: 2rem; padding-bottom: 3rem; }
h1 { font-size: 2rem; line-height: 1.2; margin: 0 0 .75rem; }
h2 { font-size: 1.2rem; margin: 2.25rem 0 .5rem; }
.lead { font-size: 1.15rem; color: var(--muted); }
.meta { color: var(--muted); margin-top: 0; }
a { color: var(--link); }
code { font-size: .88em; overflow-wrap: anywhere; }
li { margin: .35rem 0; }
footer { padding-top: 1rem; padding-bottom: 2rem; border-top: 1px solid var(--rule); color: var(--muted); font-size: .9rem; }
footer a { color: var(--muted); }