:root { color-scheme: light dark; }
* { box-sizing: border-box; }
body {
  font: 16px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  margin: 0; padding: 0; color: #1c1c1e; background: #fff;
}
@media (prefers-color-scheme: dark) { body { color: #e5e5ea; background: #000; } a { color: #0a84ff; } .card { background:#1c1c1e; } }
.wrap { max-width: 760px; margin: 0 auto; padding: 40px 22px 80px; }
header.site { padding: 28px 22px; border-bottom: 1px solid rgba(127,127,127,.2); }
header.site .wrap { padding: 0; max-width: 760px; margin: 0 auto; }
h1 { font-size: 28px; margin: 0 0 6px; }
h2 { font-size: 20px; margin: 32px 0 8px; }
.muted { color: #8e8e93; font-size: 14px; }
a { color: #007aff; text-decoration: none; }
a:hover { text-decoration: underline; }
.card { background:#f2f2f7; border-radius: 14px; padding: 18px 20px; margin: 18px 0; }
.nav a { margin-right: 18px; font-weight: 600; }
ul { padding-left: 22px; }
li { margin: 6px 0; }
footer { margin-top: 48px; padding-top: 18px; border-top: 1px solid rgba(127,127,127,.2); color:#8e8e93; font-size: 13px; }