:root { color-scheme: light dark; }
* { box-sizing: border-box; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
  max-width: 720px;
  margin: 0 auto;
  padding: 40px 22px 80px;
  color: #1c1c1e;
  background: #ffffff;
}
@media (prefers-color-scheme: dark) {
  body { color: #f2f2f7; background: #000000; }
  a { color: #6ca8ff; }
  code { background: #1c1c1e; }
}
h1 { font-size: 1.8rem; margin-bottom: 0.2em; }
h2 { font-size: 1.2rem; margin-top: 1.8em; }
.muted { color: #8e8e93; font-size: 0.9rem; }
a { color: #2f6fea; }
code { background: #f2f2f7; padding: 1px 5px; border-radius: 5px; font-size: 0.95em; }
nav { margin-bottom: 28px; font-size: 0.95rem; }
hr { border: none; border-top: 1px solid #8e8e9355; margin: 32px 0; }