:root {
  color-scheme: light dark;
  --fg: #141414; --muted: #5f5f5f; --bg: #fafafa; --rule: #e2e2e2; --link: #1a5fd0;
}
@media (prefers-color-scheme: dark) {
  :root { --fg: #ececec; --muted: #9a9a9a; --bg: #111; --rule: #2a2a2a; --link: #7fb0ff; }
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--fg);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
}
main { max-width: 680px; margin: 0 auto; padding: 48px 16px 64px; }
a { color: var(--link); }
h1 { font-size: 40px; line-height: 1.1; letter-spacing: -0.02em; margin: 0 0 8px; }
h2 { font-size: 20px; margin: 36px 0 8px; }
p, li { margin: 0 0 12px; }
ul { padding-left: 22px; }
.lede { font-size: 20px; color: var(--muted); margin-bottom: 28px; }
.muted { color: var(--muted); }
nav { font-size: 15px; margin-bottom: 40px; }
nav a { margin-right: 16px; text-decoration: none; }
nav a.home { font-weight: 700; color: var(--fg); }
footer { border-top: 1px solid var(--rule); margin-top: 48px; padding-top: 16px; font-size: 14px; color: var(--muted); }
footer a { color: var(--muted); }