:root {
  --bg: #ffffff;
  --fg: #1c2126;
  --muted: #5b6168;
  --line: #e3e6e4;
  --tint: #f1f3f2;
  --accent: #2456a6;
  --max: 46rem;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #15181b; --fg: #ecedea; --muted: #a9adb1; --line: #2c3237; --tint: #1d2125; --accent: #9dbef2; }
}
* { box-sizing: border-box; }
html { scroll-padding-top: 1.5rem; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.7 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
a { color: var(--accent); }
a:focus-visible, button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.skip { position: absolute; left: -999px; }
.skip:focus { left: 1rem; top: 1rem; background: var(--bg); padding: .5rem 1rem; z-index: 2; }
header.top {
  display: flex; align-items: center; justify-content: space-between; gap: 1rem; flex-wrap: wrap;
  padding: 1rem 1.25rem; border-bottom: 1px solid var(--line);
}
header.top .brand { font-weight: 600; letter-spacing: .06em; text-decoration: none; color: var(--fg); }
header.top nav a { margin-left: 1.25rem; text-decoration: none; }
.layout { display: grid; grid-template-columns: 15rem minmax(0, 1fr); gap: 2.5rem; max-width: 70rem; margin: 0 auto; padding: 2rem 1.25rem 4rem; }
.toc { position: sticky; top: 1.5rem; align-self: start; font-size: .9375rem; }
.toc ol { list-style: none; margin: 0; padding: 0; }
.toc li { margin: .25rem 0; }
.toc a { color: var(--muted); text-decoration: none; }
.toc a:hover { color: var(--fg); }
main { max-width: var(--max); min-width: 0; }
h1 { font-size: 2rem; line-height: 1.25; margin: 0 0 .5rem; }
h2 { font-size: 1.375rem; margin: 3rem 0 .75rem; padding-top: 1rem; border-top: 1px solid var(--line); }
h3 { font-size: 1.0625rem; margin: 1.75rem 0 .5rem; }
.lead { color: var(--muted); font-size: 1.0625rem; }
table { width: 100%; border-collapse: collapse; margin: 1rem 0; font-size: .9375rem; display: block; overflow-x: auto; }
th, td { text-align: left; vertical-align: top; padding: .5rem .75rem .5rem 0; border-bottom: 1px solid var(--line); }
th { font-weight: 600; white-space: nowrap; }
code { font: .875em ui-monospace, SFMono-Regular, Menlo, monospace; background: var(--tint); padding: .1em .35em; border-radius: 4px; }
.note { background: var(--tint); border-left: 3px solid var(--accent); padding: .75rem 1rem; margin: 1rem 0; }
.button { display: inline-block; background: var(--fg); color: var(--bg); padding: .75rem 1.5rem; text-decoration: none; border-radius: 4px; font-weight: 600; }
footer.bottom { border-top: 1px solid var(--line); padding: 1.5rem 1.25rem; color: var(--muted); font-size: .875rem; text-align: center; }
@media (max-width: 52rem) {
  .layout { grid-template-columns: 1fr; gap: 1rem; }
  .toc { position: static; border-bottom: 1px solid var(--line); padding-bottom: 1rem; }
  .toc ol { columns: 2; }
}