/* One stylesheet, no framework, no webfont request. The site has to load fast
   from anywhere and must not depend on a third-party host -- a privacy policy
   served with a CDN font request is a privacy policy that contradicts itself. */

:root {
  --ink: #1a1c22;
  --ink-soft: #4b5060;
  --paper: #fdfdfc;
  --panel: #f4f4f2;
  --rule: #e2e2df;
  --link: #1c5fbe;
  --accent: #b4531a;
  --measure: 41rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink: #e8e8e6;
    --ink-soft: #a2a6b3;
    --paper: #16171b;
    --panel: #1f2027;
    --rule: #33353d;
    --link: #7fb0f5;
    --accent: #e0925c;
  }
}

*, *::before, *::after { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 16px/1.65 ui-serif, Georgia, "Times New Roman", serif;
  -webkit-text-size-adjust: 100%;
}

header {
  border-bottom: 1px solid var(--rule);
  background: var(--panel);
}

.bar {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 0.9rem 1.25rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.25rem;
  align-items: baseline;
}

.brand {
  font-weight: 700;
  letter-spacing: 0.02em;
  text-decoration: none;
  color: var(--ink);
  font-size: 1.05rem;
}

nav { display: flex; flex-wrap: wrap; gap: 0.25rem 1rem; }

nav a {
  font: 500 0.85rem/1 ui-sans-serif, system-ui, sans-serif;
  color: var(--ink-soft);
  text-decoration: none;
  padding: 0.2rem 0;
  border-bottom: 2px solid transparent;
}

nav a:hover { color: var(--ink); }
nav a[aria-current="page"] { color: var(--ink); border-bottom-color: var(--accent); }

main {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 2.5rem 1.25rem 4rem;
}

h1 {
  font-size: 1.9rem;
  line-height: 1.2;
  margin: 0 0 1.5rem;
  letter-spacing: -0.01em;
}

h2 {
  font-size: 1.3rem;
  line-height: 1.3;
  margin: 2.75rem 0 0.75rem;
  padding-top: 0.5rem;
  border-top: 1px solid var(--rule);
}

h3 { font-size: 1.05rem; margin: 1.75rem 0 0.5rem; }

p, ul, ol, blockquote, table { margin: 0 0 1.1rem; }

li { margin-bottom: 0.35rem; }

a { color: var(--link); text-underline-offset: 2px; }

strong { font-weight: 700; }

hr { border: 0; border-top: 1px solid var(--rule); margin: 2.5rem 0; }

blockquote {
  margin-left: 0;
  padding: 0.1rem 0 0.1rem 1rem;
  border-left: 3px solid var(--accent);
  color: var(--ink-soft);
}

code, pre {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.87em;
}

code {
  background: var(--panel);
  border: 1px solid var(--rule);
  border-radius: 3px;
  padding: 0.08em 0.32em;
}

pre {
  background: var(--panel);
  border: 1px solid var(--rule);
  border-radius: 4px;
  padding: 0.9rem 1rem;
  overflow-x: auto;
  line-height: 1.5;
}

pre code { background: none; border: 0; padding: 0; font-size: 1em; }

/* Wide content scrolls inside its own box; the page body never scrolls sideways. */
.table-wrap, table { display: block; overflow-x: auto; max-width: 100%; }

table { border-collapse: collapse; font-size: 0.92rem; }
th, td { border: 1px solid var(--rule); padding: 0.45rem 0.7rem; text-align: left; vertical-align: top; }
th { background: var(--panel); font-weight: 700; }

img { max-width: 100%; height: auto; }

footer {
  border-top: 1px solid var(--rule);
  background: var(--panel);
  color: var(--ink-soft);
  font: 0.82rem/1.6 ui-sans-serif, system-ui, sans-serif;
}

footer p { max-width: var(--measure); margin: 0 auto; padding: 0 1.25rem; }
footer p:first-child { padding-top: 1.5rem; }
footer p:last-child { padding-bottom: 1.5rem; }
footer a { color: var(--ink-soft); }

/* The limitations page separates every section with `---` AND an `<h2>`, so the
   rule from the <hr> and the h2's own border-top land two pixels apart. The h2
   keeps its rule when it stands alone; it gives it up when an <hr> already drew
   one. */
hr + h2 {
  border-top: 0;
  padding-top: 0;
  margin-top: 0;
}