:root {
  --bg: #fdfdfc; --fg: #1d1d1b; --muted: #6b6b66; --line: #e2e1dc;
  --code-bg: #f3f2ee; --link: #1f5fbf; --accent: #b4561c;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #161615; --fg: #e6e5e0; --muted: #9a9993; --line: #2f2f2c;
    --code-bg: #20201e; --link: #7fb0ff; --accent: #e8945c;
    color-scheme: dark;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--fg);
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
header, main, footer { max-width: 46rem; margin: 0 auto; padding: 0 16px; }
header { border-bottom: 1px solid var(--line); }
header nav { display: flex; flex-wrap: wrap; gap: .25rem 1.25rem; padding: .9rem 0; }
header a { color: var(--muted); text-decoration: none; }
header a:first-child { color: var(--fg); font-weight: 600; }
header a[aria-current="page"] { color: var(--accent); }
header a:hover { color: var(--fg); }
main { padding-top: 1.5rem; padding-bottom: 3rem; }
footer { color: var(--muted); font-size: .85rem; border-top: 1px solid var(--line); padding-top: 1rem; padding-bottom: 2rem; }
a { color: var(--link); }
h1, h2, h3, h4 { line-height: 1.25; margin: 2rem 0 .75rem; position: relative; }
h1 { font-size: 2rem; margin-top: .5rem; }
h2 { font-size: 1.4rem; border-bottom: 1px solid var(--line); padding-bottom: .3rem; }
h3 { font-size: 1.15rem; }
.anchor { position: absolute; left: -1.1rem; color: var(--line); text-decoration: none; font-weight: 400; }
h1:hover .anchor, h2:hover .anchor, h3:hover .anchor, h4:hover .anchor { color: var(--muted); }
code, pre { font: .9em/1.5 ui-monospace, "SF Mono", Menlo, Consolas, monospace; }
code { background: var(--code-bg); padding: .1em .3em; border-radius: 3px; }
pre { background: var(--code-bg); padding: .8rem 1rem; overflow-x: auto; border-radius: 4px; }
pre code { background: none; padding: 0; }
table { border-collapse: collapse; display: block; overflow-x: auto; margin: 1rem 0; }
th, td { border: 1px solid var(--line); padding: .35rem .6rem; text-align: left; vertical-align: top; }
th { background: var(--code-bg); }
hr { border: 0; border-top: 2px solid var(--line); margin: 3rem 0; }
blockquote { margin: 1rem 0; padding: 0 1rem; color: var(--muted); border-left: 3px solid var(--line); }
img { max-width: 100%; }