:root {
  --bg: #0d0f14;
  --surface: #161a22;
  --border: #262c38;
  --text: #e8ebf0;
  --muted: #9aa3b2;
  --accent: #7c5cff;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.65;
}
.wrap { max-width: 720px; margin: 0 auto; padding: 48px 20px 80px; }
header a.brand { color: var(--text); text-decoration: none; font-weight: 800; font-size: 20px; letter-spacing: 0.5px; }
header a.brand span { color: var(--accent); }
nav { margin-top: 8px; }
nav a { color: var(--muted); text-decoration: none; font-size: 14px; margin-right: 16px; }
nav a:hover, nav a.active { color: var(--accent); }
h1 { font-size: 28px; margin: 36px 0 4px; }
.updated { color: var(--muted); font-size: 13px; margin-bottom: 28px; }
h2 { font-size: 17px; margin: 28px 0 8px; color: var(--accent); }
p { color: var(--text); font-size: 15px; margin-bottom: 12px; }
p.muted { color: var(--muted); }
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  margin: 20px 0;
}
a { color: var(--accent); }
footer { margin-top: 48px; color: var(--muted); font-size: 13px; border-top: 1px solid var(--border); padding-top: 20px; }

/* 2026-11-05: language switch, lists, sub-headings, contents, owner placeholders. Same look. */
nav.lang { margin-top: 6px; }
nav.lang a { font-size: 13px; margin-right: 14px; }
nav.lang a[aria-current="true"] { color: var(--text); }
h3 { font-size: 15px; margin: 20px 0 6px; color: var(--text); }
ul, ol { margin: 0 0 12px 20px; }
li { color: var(--text); font-size: 15px; margin-bottom: 6px; }
.card ul { margin-bottom: 4px; }
.toc ol { margin-left: 22px; columns: 2; column-gap: 28px; }
.toc li { font-size: 14px; margin-bottom: 4px; break-inside: avoid; }
.toc a { text-decoration: none; }
section { scroll-margin-top: 16px; }
.note { color: var(--muted); font-size: 13px; }
mark.owner { background: #ffd54a; color: #1b1814; font-weight: 700; padding: 1px 5px; border-radius: 4px; }
@media (max-width: 520px) { .toc ol { columns: 1; } }
h1 { line-height: 1.2; }
.card > h2:first-child { margin-top: 2px; }