:root {
  --bg: #fbfbf9;
  --text: #1c1c1a;
  --muted: #5d5d58;
  --rule: #e2e1dc;
  --link: #1f5fa8;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #161615;
    --text: #e8e7e3;
    --muted: #a3a29c;
    --rule: #2f2f2c;
    --link: #8ab8ec;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 18px/1.6 ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
.wrap { max-width: 38rem; margin: 0 auto; padding: 2.5rem 1rem 4rem; }
nav { display: flex; gap: 1.25rem; font-size: 0.95rem; margin-bottom: 3rem; }
nav a { color: var(--muted); text-decoration: none; }
nav a:hover, nav a[aria-current] { color: var(--text); }
h1 { font-size: 2rem; line-height: 1.2; margin: 0 0 1rem; letter-spacing: -0.01em; }
h2 { font-size: 1.25rem; margin: 3rem 0 0.25rem; }
.sub { color: var(--muted); margin: 0 0 1rem; font-size: 0.95rem; }
a { color: var(--link); text-underline-offset: 0.15em; }
ul { padding-left: 1.2rem; }
li { margin: 0.35rem 0; }
.lede { font-size: 1.15rem; }
footer { margin-top: 4rem; padding-top: 1rem; border-top: 1px solid var(--rule); color: var(--muted); font-size: 0.85rem; }