:root {
  --bg: #f7f6f4;
  --surface: #ffffff;
  --border: #e7e4e0;
  --text: #141414;
  --muted: #6b6b6b;
  --brand: #ff5b00;
  --brand-tint: #fff1e8;
  --brand-text: #c44300;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121212;
    --surface: #1c1c1c;
    --border: #2e2e2e;
    --text: #f2f2f2;
    --muted: #a3a3a3;
    --brand-tint: #2a1a10;
    --brand-text: #ff8a4c;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}
.bar {
  max-width: 820px;
  margin: 0 auto;
  padding: 14px 16px;
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
.logo { font-weight: 800; font-size: 20px; color: var(--text); text-decoration: none; letter-spacing: -0.3px; }
.logo span { color: var(--brand); }
nav { display: flex; gap: 14px; flex-wrap: wrap; margin-left: auto; }
nav a { color: var(--muted); text-decoration: none; font-size: 15px; }
nav a[aria-current="page"] { color: var(--brand-text); font-weight: 600; }
main { max-width: 820px; margin: 0 auto; padding: 28px 16px 64px; }
h1 { font-size: 30px; line-height: 1.2; margin: 0 0 6px; letter-spacing: -0.4px; }
.updated { color: var(--muted); margin: 0 0 24px; }
.summary {
  background: var(--brand-tint);
  border-radius: 14px;
  padding: 16px 18px;
  margin: 0 0 28px;
}
.summary h2 { margin-top: 0; font-size: 17px; }
.summary ul { margin-bottom: 0; }
h2 { font-size: 21px; margin: 36px 0 8px; letter-spacing: -0.2px; }
h3 { font-size: 17px; margin: 22px 0 6px; }
p, li { color: var(--text); }
a { color: var(--brand-text); }
ul { padding-left: 22px; }
li { margin: 4px 0; }
.table-wrap { overflow-x: auto; margin: 12px 0; }
table { border-collapse: collapse; width: 100%; min-width: 560px; background: var(--surface); border: 1px solid var(--border); border-radius: 12px; overflow: hidden; font-size: 15px; }
th, td { text-align: left; vertical-align: top; padding: 10px 12px; border-bottom: 1px solid var(--border); }
th { background: var(--bg); font-weight: 600; }
tr:last-child td { border-bottom: 0; }
.cards { display: grid; gap: 12px; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); margin-top: 20px; }
.card { display: block; background: var(--surface); border: 1px solid var(--border); border-radius: 16px; padding: 18px; text-decoration: none; color: var(--text); }
.card strong { display: block; font-size: 17px; margin-bottom: 4px; }
.card span { color: var(--muted); font-size: 15px; }
.toc { background: var(--surface); border: 1px solid var(--border); border-radius: 14px; padding: 14px 18px; margin-bottom: 8px; }
.toc ol { margin: 6px 0 0; padding-left: 20px; columns: 2; column-gap: 28px; }
@media (max-width: 600px) { .toc ol { columns: 1; } h1 { font-size: 26px; } }
footer { border-top: 1px solid var(--border); color: var(--muted); font-size: 14px; }
footer .bar { justify-content: space-between; }
footer a { color: var(--muted); }