:root {
  --bg: #ffffff;
  --fg: #1f2328;
  --muted: #656d76;
  --line: #d0d7de;
  --link: #0b57d0;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #0d1117; --fg: #e6edf3; --muted: #8d96a0; --line: #30363d; --link: #6ea8fe; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
.wrap { max-width: 760px; margin: 0 auto; padding: 0 16px; }
header { border-bottom: 1px solid var(--line); }
header .wrap { display: flex; flex-wrap: wrap; gap: 8px 24px; justify-content: space-between; align-items: center; padding-top: 14px; padding-bottom: 14px; }
.brand { font-weight: 600; color: var(--fg); text-decoration: none; }
nav a { margin-left: 16px; }
nav a:first-child { margin-left: 0; }
a { color: var(--link); }
h1 { font-size: 2rem; margin: 32px 0 8px; }
h2 { font-size: 1.2rem; margin: 28px 0 8px; }
.lead { font-size: 1.15rem; color: var(--muted); margin-top: 0; }
.muted { color: var(--muted); }
code { font-size: .9em; overflow-wrap: anywhere; }
footer { border-top: 1px solid var(--line); margin-top: 40px; padding-top: 16px; padding-bottom: 32px; color: var(--muted); }