:root {
  --bg: #fbfaf8;
  --surface: #ffffff;
  --fg: #1b1d21;
  --muted: #5c6370;
  --border: #e6e3de;
  --accent: #d94e0b;
  --accent-soft: #fdeee6;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121316;
    --surface: #1a1c20;
    --fg: #eceef1;
    --muted: #9aa1ad;
    --border: #2b2e35;
    --accent: #ff8a4c;
    --accent-soft: #2a1d16;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.65 system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans", sans-serif;
}
a { color: var(--accent); }
.wrap { max-width: 760px; margin: 0 auto; padding: 0 16px; }
header.site { border-bottom: 1px solid var(--border); background: var(--surface); }
header.site .wrap { display: flex; align-items: center; gap: 10px; height: 60px; }
.brand { font-weight: 700; font-size: 1.15rem; color: var(--fg); text-decoration: none; display: flex; align-items: center; gap: 8px; }
.brand svg { width: 26px; height: 26px; color: var(--accent); }
main { padding: 32px 0 64px; }
h1 { font-size: 1.9rem; line-height: 1.25; margin: 0 0 8px; }
h2 { font-size: 1.25rem; margin: 40px 0 8px; padding-top: 8px; }
h3 { font-size: 1.05rem; margin: 24px 0 4px; }
.meta { color: var(--muted); margin: 0 0 24px; }
.summary { background: var(--accent-soft); border-radius: 12px; padding: 16px 20px; margin: 24px 0; }
.summary ul { margin: 8px 0 0; padding-left: 20px; }
nav.toc { border: 1px solid var(--border); border-radius: 12px; padding: 12px 20px; background: var(--surface); }
nav.toc ol { margin: 8px 0; padding-left: 20px; columns: 2; column-gap: 32px; }
@media (max-width: 560px) { nav.toc ol { columns: 1; } }
table { width: 100%; border-collapse: collapse; margin: 12px 0; font-size: 0.95rem; display: block; overflow-x: auto; }
th, td { text-align: left; vertical-align: top; padding: 10px 12px; border-bottom: 1px solid var(--border); }
th { background: var(--surface); font-weight: 600; white-space: nowrap; }
footer.site { border-top: 1px solid var(--border); color: var(--muted); font-size: 0.9rem; padding: 24px 0 40px; }
.hero { padding: 48px 0 24px; }
.hero p { font-size: 1.1rem; color: var(--muted); max-width: 560px; }
.links { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 24px; }
.links a { border: 1px solid var(--border); background: var(--surface); padding: 10px 16px; border-radius: 10px; text-decoration: none; color: var(--fg); }
.invite-code { font: 700 2rem/1.2 ui-monospace, "SFMono-Regular", Consolas, monospace; letter-spacing: 0.2em; color: var(--fg); background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 16px 20px; display: inline-block; }