/* scaledbox.dev and docs.scaledbox.dev: system fonts, no images, no
   scripts. Colours meet WCAG AA contrast in light and dark. */
:root {
  color-scheme: light dark;
  --fg: #1b1f24;
  --muted: #4d5560;
  --bg: #ffffff;
  --soft: #f3f5f7;
  --line: #d5dae0;
  --link: #0b57b0;
  --accent: #0b57b0;
}
@media (prefers-color-scheme: dark) {
  :root {
    --fg: #e6e9ed;
    --muted: #a9b1bb;
    --bg: #111418;
    --soft: #1b2027;
    --line: #333b45;
    --link: #79b0f2;
    --accent: #79b0f2;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font: 1.0625rem/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color: var(--fg);
  background: var(--bg);
}
a { color: var(--link); text-underline-offset: 0.15em; }
a:focus-visible, summary:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; border-radius: 2px; }
.skip { position: absolute; left: -999px; top: 0.5rem; background: var(--bg); padding: 0.5rem 1rem; }
.skip:focus { left: 0.5rem; z-index: 1; }
header { border-bottom: 1px solid var(--line); }
header nav, main, footer p { max-width: 46rem; margin: 0 auto; padding: 0 1.25rem; }
header nav { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 0.5rem 1.5rem; padding-top: 0.9rem; padding-bottom: 0.9rem; }
header ul { display: flex; gap: 1.25rem; list-style: none; margin: 0; padding: 0; }
header a { text-decoration: none; }
header a:hover, header a[aria-current] { text-decoration: underline; }
.brand { font-weight: 700; font-size: 1.15rem; color: var(--fg); }
main { padding-top: 1.5rem; padding-bottom: 3rem; }
h1 { font-size: 2rem; line-height: 1.25; margin: 1rem 0; }
h2 { font-size: 1.4rem; line-height: 1.3; margin: 2.25rem 0 0.75rem; }
h3 { font-size: 1.15rem; margin: 1.75rem 0 0.5rem; }
p, ul, ol, table, pre { margin: 0 0 1rem; }
li + li { margin-top: 0.25rem; }
code { font: 0.9em/1.5 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; background: var(--soft); padding: 0.1em 0.3em; border-radius: 4px; }
pre { background: var(--soft); border: 1px solid var(--line); border-radius: 6px; padding: 0.9rem 1rem; overflow-x: auto; }
pre code { background: none; padding: 0; font-size: 0.875rem; }
table { border-collapse: collapse; width: 100%; display: block; overflow-x: auto; font-size: 0.95rem; }
th, td { border: 1px solid var(--line); padding: 0.4rem 0.6rem; text-align: left; vertical-align: top; }
th { background: var(--soft); }
blockquote { margin: 0 0 1rem; padding: 0.1rem 1rem; border-left: 4px solid var(--line); color: var(--muted); }
hr { border: 0; border-top: 1px solid var(--line); margin: 2rem 0; }
footer { border-top: 1px solid var(--line); color: var(--muted); font-size: 0.9rem; }
footer p { padding-top: 1.25rem; padding-bottom: 2rem; }