:root {
  --bg: #ffffff;
  --fg: #16202a;
  --muted: #5b6b7a;
  --line: #e3e8ee;
  --accent: #2f6fed;
  --accent-fg: #ffffff;
  --card: #f6f8fb;
  --code-bg: #0f1720;
  --code-fg: #d7e3f4;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e141b;
    --fg: #e6edf5;
    --muted: #97a6b6;
    --line: #22303f;
    --accent: #5b93ff;
    --accent-fg: #0b1220;
    --card: #141d27;
    --code-bg: #0a0f15;
    --code-fg: #d7e3f4;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.wrap { max-width: 960px; margin: 0 auto; padding: 0 20px; }
header { border-bottom: 1px solid var(--line); }
header .wrap { display: flex; align-items: center; justify-content: space-between; height: 60px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 650; color: var(--fg); }
.brand svg { width: 24px; height: 24px; }
nav a { margin-left: 22px; color: var(--muted); font-size: 15px; }
nav a:hover, nav a.active { color: var(--fg); text-decoration: none; }
.hero { padding: 72px 0 48px; }
.hero h1 { font-size: clamp(30px, 5vw, 46px); line-height: 1.15; margin: 0 0 16px; letter-spacing: -0.02em; }
.hero p { color: var(--muted); font-size: 18px; max-width: 620px; margin: 0 0 28px; }
.btn {
  display: inline-block; padding: 10px 18px; border-radius: 8px; font-weight: 600;
  background: var(--accent); color: var(--accent-fg); margin-right: 10px;
}
.btn.ghost { background: transparent; color: var(--fg); border: 1px solid var(--line); }
.btn:hover { text-decoration: none; opacity: .92; }
.grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); padding: 8px 0 56px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 20px; }
.card h3 { margin: 0 0 6px; font-size: 17px; }
.card p { margin: 0; color: var(--muted); font-size: 15px; }
pre {
  background: var(--code-bg); color: var(--code-fg); padding: 16px 18px; border-radius: 10px;
  overflow-x: auto; font: 14px/1.55 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 0.92em; }
p code, li code { background: var(--card); border: 1px solid var(--line); padding: 1px 6px; border-radius: 5px; }
section.block { padding: 8px 0 40px; }
section.block h2 { font-size: 24px; margin: 0 0 12px; letter-spacing: -0.01em; }
table { width: 100%; border-collapse: collapse; margin: 12px 0 24px; font-size: 15px; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--line); }
th { color: var(--muted); font-weight: 600; }
footer { border-top: 1px solid var(--line); color: var(--muted); font-size: 14px; padding: 22px 0 40px; }
.doc { display: grid; gap: 32px; grid-template-columns: 200px 1fr; padding: 40px 0 60px; }
.doc aside a { display: block; padding: 5px 0; color: var(--muted); font-size: 15px; }
.doc aside a:hover { color: var(--fg); text-decoration: none; }
.doc h1 { margin: 0 0 8px; font-size: 32px; letter-spacing: -0.02em; }
.doc h2 { margin: 36px 0 10px; font-size: 22px; }
.doc p, .doc li { color: var(--fg); }
.lead { color: var(--muted); font-size: 18px; margin-top: 0; }
.center { text-align: center; padding: 96px 0; }
.center h1 { font-size: 64px; margin: 0; }
@media (max-width: 720px) {
  .doc { grid-template-columns: 1fr; gap: 8px; }
  nav a { margin-left: 14px; }
}