:root { --bg:#ffffff; --fg:#1d1d1f; --muted:#6e6e73; --rule:#d2d2d7; --link:#b4530a; }
@media (prefers-color-scheme: dark) { :root { --bg:#1c1c1e; --fg:#f5f5f7; --muted:#a1a1a6; --rule:#3a3a3c; --link:#ff9f4a; } }
* { box-sizing: border-box; }
body { margin:0; background:var(--bg); color:var(--fg);
  font: 17px/1.55 -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif; }
main { max-width: 42rem; margin: 0 auto; padding: 2.5rem 1rem 4rem; }
h1 { font-size: 1.9rem; line-height:1.2; margin: 0 0 .25rem; }
h2 { font-size: 1.2rem; margin: 2rem 0 .5rem; }
p, li { margin: .5rem 0; }
.muted { color: var(--muted); }
a { color: var(--link); }
nav { margin-bottom: 2rem; font-size: .95rem; }
nav a { margin-right: 1rem; }
address { font-style: normal; }
footer { margin-top: 3rem; padding-top: 1rem; border-top: 1px solid var(--rule); font-size: .9rem; color: var(--muted); }