:root {
  --bg: #fbfbfa;
  --surface: #ffffff;
  --border: #e3e2df;
  --text: #1d1c1a;
  --muted: #66625c;
  --accent: #b0552b;
  --accent-soft: #f6ece6;
  --code-bg: #f4f3f1;
  --good: #2f6b45;
  --bad: #a33a2c;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  --sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Inter, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #16151a;
    --surface: #1e1d23;
    --border: #322f38;
    --text: #eceaf0;
    --muted: #a29daa;
    --accent: #e08a5c;
    --accent-soft: #2a2229;
    --code-bg: #201f26;
    --good: #79c295;
    --bad: #e5877a;
  }
}
:root[data-theme="dark"] {
  --bg: #16151a;
  --surface: #1e1d23;
  --border: #322f38;
  --text: #eceaf0;
  --muted: #a29daa;
  --accent: #e08a5c;
  --accent-soft: #2a2229;
  --code-bg: #201f26;
  --good: #79c295;
  --bad: #e5877a;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.62;
  overflow-x: hidden;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
code, pre { font-family: var(--mono); font-size: 0.86em; }

.wrap { max-width: 880px; margin: 0 auto; padding: 0 24px; }

/* ---------- site nav ---------- */
.nav {
  border-bottom: 1px solid var(--border);
  background: var(--surface);
  position: sticky;
  top: 0;
  z-index: 20;
}
.nav .wrap {
  display: flex;
  align-items: center;
  gap: 20px;
  height: 54px;
}
.nav .brand {
  font-family: var(--mono);
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--text);
  letter-spacing: -0.01em;
}
.nav .brand span { color: var(--accent); }
.nav .links { display: flex; gap: 16px; margin-left: auto; font-size: 0.92rem; flex-wrap: wrap; }
.nav .links a { color: var(--muted); }
.nav .links a:hover, .nav .links a[aria-current="page"] { color: var(--text); text-decoration: none; }
.nav .links a[aria-current="page"] { font-weight: 600; }

/* ---------- page furniture ---------- */
.page { padding: 44px 0 72px; }
h1 { font-size: 2rem; letter-spacing: -0.02em; margin: 0 0 8px; }
.lede { color: var(--muted); font-size: 1.06rem; margin: 0 0 32px; max-width: 64ch; }
h2 {
  font-size: 1.28rem;
  letter-spacing: -0.01em;
  margin: 48px 0 10px;
  padding-top: 8px;
  scroll-margin-top: 70px;
}
h3 { font-size: 1.02rem; margin: 30px 0 8px; scroll-margin-top: 70px; }
p { margin: 0 0 16px; }

pre {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 9px;
  padding: 15px 18px;
  overflow-x: auto;
  line-height: 1.55;
  margin: 0 0 18px;
}
p code, li code, td code {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1px 5px;
  white-space: nowrap;
}
.cm { color: var(--muted); }
.ok { color: var(--good); }
.no { color: var(--bad); }

ul, ol { margin: 0 0 16px; padding-left: 22px; }
li { margin-bottom: 7px; }

.note {
  border-left: 3px solid var(--accent);
  background: var(--accent-soft);
  padding: 14px 18px;
  border-radius: 0 9px 9px 0;
  margin: 0 0 20px;
}
.note p:last-child { margin: 0; }
.note strong { color: var(--text); }

.tablewrap { overflow-x: auto; margin-bottom: 20px; }
table { border-collapse: collapse; width: 100%; font-size: 0.93rem; }
th, td { text-align: left; padding: 9px 12px; border-bottom: 1px solid var(--border); vertical-align: top; }
th {
  font-weight: 600;
  color: var(--muted);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  white-space: nowrap;
}
td:first-child code { white-space: nowrap; }

/* ---------- table of contents ---------- */
.toc {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px 20px;
  margin-bottom: 36px;
}
.toc h2 { margin: 0 0 8px; font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--muted); padding: 0; }
.toc ul { margin: 0; padding-left: 18px; columns: 2; column-gap: 28px; }
.toc li { margin-bottom: 4px; font-size: 0.92rem; break-inside: avoid; }

/* ---------- cards ---------- */
.grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); margin-bottom: 20px; }
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 18px 20px;
}
.card h3 { margin: 0 0 6px; font-size: 0.98rem; }
.card p { margin: 0; color: var(--muted); font-size: 0.92rem; }

/* ---------- footer ---------- */
footer {
  border-top: 1px solid var(--border);
  padding: 28px 0 56px;
  color: var(--muted);
  font-size: 0.9rem;
}
footer a { color: var(--muted); text-decoration: underline; }
footer p { margin: 0 0 6px; }

@media (max-width: 640px) {
  body { font-size: 16px; }
  h1 { font-size: 1.7rem; }
  .toc ul { columns: 1; }
  .nav .wrap { height: auto; padding-top: 10px; padding-bottom: 10px; flex-wrap: wrap; gap: 10px; }
  .nav .links { margin-left: 0; width: 100%; }
}