:root {
  color-scheme: light dark;
  --bg: #fbfbfd; --fg: #1d1d1f; --muted: #6e6e73;
  --line: #e3e3e6; --accent: #0b6bcb; --card: #ffffff;
}
@media (prefers-color-scheme: dark) {
  :root { --bg:#000; --fg:#f5f5f7; --muted:#98989d; --line:#2a2a2c; --card:#141416; }
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--fg);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
}
.wrap { max-width: 720px; margin: 0 auto; padding: 0 24px; }
header.site { padding: 20px 0; border-bottom: 1px solid var(--line); }
header.site .wrap { display: flex; align-items: center; gap: 10px; }
.mark { width: 26px; height: 26px; border-radius: 7px; background: var(--accent);
        display: grid; place-items: center; color: #fff; font-size: 14px; font-weight: 700; }
.brand { font-weight: 600; letter-spacing: -0.2px; }
header.site nav { margin-left: auto; display: flex; gap: 18px; font-size: 15px; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.hero { padding: 72px 0 56px; text-align: center; }
.hero h1 { font-size: 46px; line-height: 1.08; letter-spacing: -1.2px; margin: 0 0 14px; }
.hero p { font-size: 20px; color: var(--muted); margin: 0 auto; max-width: 30rem; }
.features { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            padding: 8px 0 64px; }
.feature { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 20px; }
.feature h3 { margin: 0 0 6px; font-size: 16px; }
.feature p { margin: 0; font-size: 15px; color: var(--muted); }
main.doc { padding: 48px 0 72px; }
main.doc h1 { font-size: 32px; letter-spacing: -0.6px; margin: 0 0 6px; }
main.doc .updated { color: var(--muted); font-size: 15px; margin: 0 0 32px; }
main.doc h2 { font-size: 19px; margin: 34px 0 8px; letter-spacing: -0.2px; }
main.doc p, main.doc li { color: var(--fg); }
main.doc ul { padding-left: 22px; }
main.doc li { margin: 6px 0; }
.callout { background: var(--card); border: 1px solid var(--line); border-left: 3px solid var(--accent);
           border-radius: 10px; padding: 14px 16px; margin: 20px 0; font-size: 16px; }
footer.site { border-top: 1px solid var(--line); padding: 28px 0 56px; color: var(--muted); font-size: 14px; }
footer.site .wrap { display: flex; gap: 18px; flex-wrap: wrap; }
footer.site .spacer { margin-left: auto; }