:root {
  --bg: #ffffff;
  --text: #1b1b1f;
  --muted: #5c5c66;
  --line: #e2e2e8;
  --link: #0b57d0;
  --raised: #f5f5f8;
  --mark: #fff1b8;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e0e10;
    --text: #ececf1;
    --muted: #a3a3ad;
    --line: #2a2a31;
    --link: #8ab4f8;
    --raised: #18181c;
    --mark: #5a4a00;
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

.top, main, footer {
  max-width: 46rem;
  margin: 0 auto;
  padding: 0 16px;
}

.top { padding-top: 20px; padding-bottom: 4px; }

.brand {
  color: var(--text);
  font-weight: 700;
  font-size: 1.1rem;
  text-decoration: none;
}

main { padding-bottom: 40px; overflow-wrap: break-word; }

h1 { font-size: 2rem; line-height: 1.2; margin: 1.2rem 0 1rem; }
h2 { font-size: 1.35rem; line-height: 1.3; margin: 2.2rem 0 0.6rem; }
h3 { font-size: 1.1rem; margin: 1.6rem 0 0.4rem; }

a { color: var(--link); }

ul, ol { padding-left: 1.4rem; }
li { margin: 0.3rem 0; }

code {
  background: var(--raised);
  border-radius: 4px;
  padding: 0.1em 0.3em;
  font-size: 0.92em;
}

blockquote {
  margin: 1rem 0;
  padding: 0.2rem 1rem;
  border-left: 3px solid var(--line);
  color: var(--muted);
}

.table { overflow-x: auto; margin: 1rem 0; }

table { border-collapse: collapse; width: 100%; font-size: 0.95rem; }

th, td {
  border-bottom: 1px solid var(--line);
  padding: 0.5rem 0.6rem;
  text-align: left;
  vertical-align: top;
  min-width: 8rem;
}

th { background: var(--raised); }

mark.fill { background: var(--mark); color: inherit; padding: 0 0.2em; }

footer {
  border-top: 1px solid var(--line);
  padding-top: 16px;
  padding-bottom: 32px;
  font-size: 0.92rem;
}

footer nav { display: flex; flex-wrap: wrap; gap: 6px 18px; }

footer a { color: var(--muted); }