/* One stylesheet, no build step, no web fonts: the site is documentation and
   the pages are long, so this only has to be readable in both themes and out
   of the way on a phone. */

:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --fg: #1b1f24;
  --muted: #57606a;
  --rule: #d8dee4;
  --surface: #f6f8fa;
  --link: #0a5ca8;
  --accent: #1f883d;
  --max: 46rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d1117;
    --fg: #e6edf3;
    --muted: #9198a1;
    --rule: #30363d;
    --surface: #161b22;
    --link: #6cb6ff;
    --accent: #3fb950;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

a { color: var(--link); }
a[aria-current="page"] { font-weight: 600; color: var(--fg); }

.skip {
  position: absolute;
  left: -9999px;
}
.skip:focus {
  left: 0.5rem;
  top: 0.5rem;
  z-index: 10;
  padding: 0.5rem 0.75rem;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: 6px;
}

.topbar {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.5rem 1.25rem;
  padding: 0.85rem 1.25rem;
  border-bottom: 1px solid var(--rule);
  background: var(--surface);
}

.brand {
  font-weight: 700;
  font-size: 1.05rem;
  text-decoration: none;
  color: var(--fg);
}

.topnav { display: flex; flex-wrap: wrap; gap: 1rem; }
.topnav a { font-size: 0.92rem; }

.page {
  display: grid;
  grid-template-columns: minmax(13rem, 15rem) minmax(0, 1fr);
  gap: 2.5rem;
  max-width: 68rem;
  margin: 0 auto;
  padding: 1.75rem 1.25rem 3rem;
}

.sidebar { font-size: 0.92rem; }
.sidebar h2 {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
  margin: 1.5rem 0 0.4rem;
}
.sidebar h2:first-child { margin-top: 0; }
.sidebar ul { list-style: none; margin: 0; padding: 0; }
.sidebar li { margin: 0.28rem 0; }

main { min-width: 0; max-width: var(--max); }

h1 { font-size: 1.9rem; line-height: 1.25; margin: 0 0 1rem; }
h2 {
  font-size: 1.35rem;
  margin: 2.25rem 0 0.75rem;
  padding-bottom: 0.3rem;
  border-bottom: 1px solid var(--rule);
}
h3 { font-size: 1.1rem; margin: 1.75rem 0 0.5rem; }

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

code, pre {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.88em;
}
code { background: var(--surface); padding: 0.12em 0.35em; border-radius: 5px; }
pre {
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: 8px;
  padding: 0.85rem 1rem;
  overflow-x: auto;
}
pre code { background: none; padding: 0; }

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

/* Long reference tables are the reason for the scroll container: they must
   never make the page itself scroll sideways. */
.table-wrap, main > table { display: block; overflow-x: auto; }
table { border-collapse: collapse; width: 100%; margin: 1rem 0; }
th, td { border: 1px solid var(--rule); padding: 0.4rem 0.6rem; text-align: left; vertical-align: top; }
th { background: var(--surface); }

hr { border: 0; border-top: 1px solid var(--rule); margin: 2rem 0; }

.hero h1 { margin-bottom: 0.6rem; }

.cards ul { list-style: none; padding: 0; }
.cards > ul {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(17rem, 1fr));
  gap: 1rem;
  margin: 1rem 0;
}
.cards > ul > li {
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: 10px;
  padding: 0.85rem 1.1rem 1rem;
}
.cards h3 { margin-top: 0.2rem; }

.editlink { color: var(--muted); font-size: 0.9rem; }

.sitefoot {
  border-top: 1px solid var(--rule);
  background: var(--surface);
  color: var(--muted);
  font-size: 0.88rem;
  padding: 1.25rem;
}
.sitefoot p { max-width: 60rem; margin: 0.4rem auto; }

@media (max-width: 52rem) {
  .page { grid-template-columns: minmax(0, 1fr); gap: 1.5rem; }
  .sidebar {
    order: 2;
    border-top: 1px solid var(--rule);
    padding-top: 1rem;
  }
}