:root {
  --bg: #f7f7fb;
  --surface: #ffffff;
  --text: #1b1b24;
  --muted: #5d5d6e;
  --line: #e2e2ea;
  --accent: #5b3df5;
  --accent-soft: #ece8ff;
  --todo: #ffe08a;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111118;
    --surface: #1a1a24;
    --text: #ececf2;
    --muted: #a3a3b5;
    --line: #2d2d3b;
    --accent: #9d8bff;
    --accent-soft: #262040;
    --todo: #6b5400;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
a { color: var(--accent); }
header.site {
  display: flex; align-items: center; gap: 16px; flex-wrap: wrap;
  padding: 14px 16px; max-width: 900px; margin: 0 auto;
  border-bottom: 1px solid var(--line);
}
.brand { font-weight: 800; font-size: 1.2rem; text-decoration: none; color: var(--text); letter-spacing: -0.02em; }
header nav { display: flex; gap: 14px; flex-wrap: wrap; flex: 1; font-size: .92rem; }
header nav a { color: var(--muted); text-decoration: none; }
header nav a[aria-current="page"], header nav a:hover { color: var(--accent); }
.lang {
  font-size: .8rem; font-weight: 700; text-decoration: none;
  border: 1px solid var(--line); border-radius: 6px; padding: 2px 8px;
}
main { max-width: 900px; margin: 0 auto; padding: 24px 16px 48px; }
main.doc { background: var(--surface); border-radius: 12px; margin-top: 24px; padding: 24px clamp(16px, 4vw, 40px) 40px; }
main.home { text-align: center; padding-top: 12vh; }
main.home h1 { font-size: clamp(2.6rem, 9vw, 4.5rem); letter-spacing: -0.04em; margin: 0 0 8px; color: var(--accent); }
main.home ul { list-style: none; padding: 0; color: var(--muted); }
h1 { font-size: 1.9rem; line-height: 1.2; letter-spacing: -0.02em; }
h2 { font-size: 1.3rem; margin-top: 2em; padding-top: .6em; border-top: 1px solid var(--line); }
h3 { font-size: 1.05rem; }
.table { overflow-x: auto; margin: 1em 0; }
table { border-collapse: collapse; width: 100%; font-size: .9rem; }
th, td { border: 1px solid var(--line); padding: 8px 10px; text-align: left; vertical-align: top; }
th { background: var(--accent-soft); }
code { background: var(--accent-soft); padding: 1px 5px; border-radius: 4px; font-size: .9em; }
hr { border: 0; border-top: 1px solid var(--line); margin: 2em 0; }
mark.todo { background: var(--todo); color: inherit; padding: 0 4px; border-radius: 3px; font-weight: 700; }
footer.site { text-align: center; color: var(--muted); font-size: .85rem; padding: 24px 16px 40px; }