:root {
  --paper: #f6f2ea;
  --surface: #fffdf8;
  --ink: #221f1b;
  --muted: #6b645a;
  --line: #e2dbcf;
  --accent: #a45c14;
  --accent-soft: #f3e4d2;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  --sans: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Helvetica, Arial, sans-serif;
  --mono: "SF Mono", ui-monospace, Menlo, Consolas, monospace;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --paper: #1b1917;
    --surface: #24211e;
    --ink: #eee8de;
    --muted: #a69d90;
    --line: #37322c;
    --accent: #c98035;
    --accent-soft: #3a2c1e;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 17px/1.6 var(--sans);
}
a { color: var(--accent); text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }
code { font: 0.9em var(--mono); background: var(--accent-soft); padding: 0.1em 0.35em; border-radius: 4px; overflow-wrap: anywhere; }
pre { background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 14px 16px; overflow-x: auto; }
pre code { background: none; padding: 0; }
.wrap { max-width: 880px; margin: 0 auto; padding: 0 20px; }
header.site { border-bottom: 1px solid var(--line); }
header.site .wrap { display: flex; align-items: center; gap: 12px; min-height: 64px; flex-wrap: wrap; }
header.site .brand { display: flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; font-weight: 600; }
header.site .brand img { width: 36px; height: 36px; }
header.site nav { margin-left: auto; display: flex; gap: 18px; flex-wrap: wrap; }
header.site nav a { color: var(--muted); text-decoration: none; }
header.site nav a:hover, header.site nav a[aria-current="page"] { color: var(--ink); }
main { padding: 48px 0 64px; }
h1, h2, h3 { font-family: var(--serif); font-weight: 600; line-height: 1.2; }
h1 { font-size: clamp(2rem, 5vw, 2.8rem); margin: 0 0 12px; }
h2 { font-size: 1.5rem; margin: 48px 0 12px; }
h3 { font-size: 1.15rem; margin: 28px 0 8px; }
.lead { font-size: 1.2rem; color: var(--muted); max-width: 38em; }
.hero { display: flex; gap: 28px; align-items: center; flex-wrap: wrap; }
.hero img { width: 144px; height: 144px; }
.buttons { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 20px; }
.button { display: inline-block; padding: 10px 18px; border-radius: 10px; font-weight: 600; text-decoration: none; border: 1px solid var(--accent); }
.button.primary { background: var(--accent); color: #fff; }
.button.secondary { color: var(--accent); }
.button[aria-disabled="true"] { opacity: 0.55; pointer-events: none; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; margin-top: 20px; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: 14px; padding: 18px 20px; }
.card h3 { margin-top: 0; }
.card p, .card ul { margin: 0; color: var(--muted); }
.card ul { padding-left: 18px; }
.note { background: var(--accent-soft); border-radius: 10px; padding: 12px 16px; }
table { border-collapse: collapse; width: 100%; margin: 12px 0; display: block; overflow-x: auto; }
th, td { text-align: left; padding: 8px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-weight: 600; }
.toc { columns: 2 220px; padding-left: 18px; }
footer.site { border-top: 1px solid var(--line); color: var(--muted); font-size: 0.9rem; }
footer.site .wrap { padding-top: 20px; padding-bottom: 32px; display: flex; gap: 18px; flex-wrap: wrap; }
footer.site a { color: var(--muted); }
@media (max-width: 560px) {
  body { font-size: 16px; }
  main { padding-top: 32px; }
  .hero img { width: 104px; height: 104px; }
}