:root {
  --bg: #ffffff;
  --text: #1c1c1c;
  --muted: #5f5e5a;
  --border: #e6e4dd;
  --accent: #e4572e;
  --accent-soft: #fdeee8;
  --max: 720px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #131313;
    --text: #f1efe8;
    --muted: #b4b2a9;
    --border: #2c2c2a;
    --accent: #f0997b;
    --accent-soft: #2a1a14;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
header.site, footer.site {
  max-width: var(--max);
  margin: 0 auto;
  padding: 20px 16px;
}
header.site { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
header.site a.brand { font-weight: 700; text-decoration: none; color: var(--text); font-size: 18px; }
header.site nav a { color: var(--muted); text-decoration: none; margin-left: 16px; font-size: 15px; }
header.site nav a:hover, footer.site a:hover { color: var(--accent); }
main {
  max-width: var(--max);
  margin: 0 auto;
  padding: 8px 16px 64px;
}
h1 { font-size: 34px; line-height: 1.2; margin: 24px 0 8px; }
h2 { font-size: 22px; margin: 40px 0 8px; }
h3 { font-size: 18px; margin: 24px 0 6px; }
p, li { max-width: 68ch; }
a { color: var(--accent); }
.meta { color: var(--muted); font-size: 15px; margin-bottom: 24px; }
.summary {
  background: var(--accent-soft);
  border-left: 4px solid var(--accent);
  padding: 12px 16px;
  margin: 16px 0 32px;
  border-radius: 0 8px 8px 0;
}
.summary p { margin: 6px 0; }
table { border-collapse: collapse; width: 100%; font-size: 15px; margin: 12px 0 24px; }
th, td { text-align: left; vertical-align: top; padding: 8px 10px; border-bottom: 1px solid var(--border); }
th { color: var(--muted); font-weight: 600; }
.toc { padding-left: 20px; columns: 2; column-gap: 32px; font-size: 15px; }
@media (max-width: 560px) { .toc { columns: 1; } }
footer.site { border-top: 1px solid var(--border); color: var(--muted); font-size: 14px; margin-top: 32px; }
footer.site a { color: var(--muted); }
.hero { text-align: center; padding: 48px 0 24px; }
.hero h1 { font-size: 44px; }
.hero p { margin: 0 auto; }
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 16px; margin: 32px 0; }
.card { border: 1px solid var(--border); border-radius: 12px; padding: 16px; text-decoration: none; color: inherit; display: block; }
.card:hover { border-color: var(--accent); }
.card h3 { color: var(--accent); }
.card h3 { margin: 0 0 6px; }
.card p { margin: 0; color: var(--muted); font-size: 15px; }
code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 0.92em; }