:root {
  --bg: #ffffff;
  --fg: #1f2328;
  --muted: #57606a;
  --line: #d0d7de;
  --accent: #0b5cad;
  --code-bg: #f6f8fa;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #0d1117; --fg: #e6edf3; --muted: #9da7b3; --line: #30363d; --accent: #6cb6ff; --code-bg: #161b22; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 16px/1.6 var(--font); }
a { color: var(--accent); }
a:focus-visible, pre:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
.skip { position: absolute; left: -9999px; }
.skip:focus { left: 1rem; top: 1rem; z-index: 10; background: var(--bg); padding: .5rem 1rem; }
header.site { display: flex; flex-wrap: wrap; gap: .5rem 2rem; align-items: center; padding: .75rem 1rem; border-bottom: 1px solid var(--line); }
.brand { font-weight: 700; text-decoration: none; color: var(--fg); }
header nav ul { display: flex; flex-wrap: wrap; gap: .25rem 1rem; margin: 0; padding: 0; list-style: none; font-size: .95rem; }
header nav a { text-decoration: none; }
header nav a[aria-current="page"] { font-weight: 700; text-decoration: underline; }
main { padding: 1rem; }
.guide { max-width: 52rem; margin: 0 auto 3rem; }
.guide h1 { font-size: 2rem; line-height: 1.25; }
.guide h2 { margin-top: 2.5rem; border-bottom: 1px solid var(--line); padding-bottom: .25rem; }
code { font-family: var(--mono); font-size: .9em; background: var(--code-bg); padding: .1em .3em; border-radius: 4px; }
figure.code { margin: 1rem 0; border: 1px solid var(--line); border-radius: 6px; background: var(--code-bg); }
figure.code figcaption { font-size: .8rem; color: var(--muted); padding: .25rem .75rem; border-bottom: 1px solid var(--line); }
pre { margin: 0; padding: .75rem; overflow-x: auto; }
pre code { background: none; padding: 0; font-size: .85rem; }
table { border-collapse: collapse; width: 100%; display: block; overflow-x: auto; }
th, td { border: 1px solid var(--line); padding: .4rem .6rem; text-align: left; vertical-align: top; }
footer.site { border-top: 1px solid var(--line); padding: 1rem; color: var(--muted); font-size: .9rem; text-align: center; }
body.reference main { padding: 0; }