:root {
  --bg: #fbfaf7;
  --surface: #ffffff;
  --ink: #1d1f24;
  --muted: #5b616e;
  --line: #e4e1da;
  --accent: #2f5bd3;
  --accent-soft: #e8eefc;
  --on-accent: #ffffff;
  --good: #1f7a4d;
  --good-soft: #e6f4ec;
  --warn: #9a5b00;
  --warn-soft: #fbf0dc;
  --code-bg: #f2f0ea;
  --radius: 12px;
  --max: 1080px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121418;
    --surface: #1a1d23;
    --ink: #e9eaee;
    --muted: #a3a9b6;
    --line: #2c313a;
    --accent: #7ea2ff;
    --accent-soft: #1d2740;
    --on-accent: #0d1324;
    --good: #6cd19c;
    --good-soft: #15291f;
    --warn: #f0b45c;
    --warn-soft: #2d2414;
    --code-bg: #20242c;
    color-scheme: dark;
  }
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 17px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
a { color: var(--accent); }
code, pre { font-family: ui-monospace, "Cascadia Code", "SF Mono", Menlo, Consolas, monospace; font-size: 0.88em; }
code { background: var(--code-bg); padding: 0.1em 0.35em; border-radius: 5px; }
pre {
  background: var(--code-bg); padding: 16px 18px; border-radius: var(--radius);
  overflow-x: auto; line-height: 1.5; border: 1px solid var(--line);
}
pre code { background: none; padding: 0; }
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 16px; }

/* Top bar */
.top { border-bottom: 1px solid var(--line); background: var(--surface); position: sticky; top: 0; z-index: 5; }
.top .wrap { display: flex; align-items: center; gap: 20px; height: 56px; }
.brand { font-weight: 700; color: var(--ink); text-decoration: none; white-space: nowrap; }
.top nav { display: flex; gap: 16px; overflow-x: auto; flex: 1; }
.top nav a { color: var(--muted); text-decoration: none; font-size: 0.92em; white-space: nowrap; }
.top nav a:hover { color: var(--ink); }
.lang { font-size: 0.9em; white-space: nowrap; }

/* Hero */
.hero { padding-top: 72px; padding-bottom: 48px; }
.eyebrow { color: var(--accent); font-weight: 600; letter-spacing: 0.02em; margin: 0 0 12px; }
.hero h1 { font-size: clamp(2rem, 5vw, 3.2rem); line-height: 1.12; margin: 0 0 18px; max-width: 18ch; }
.lead { font-size: 1.2em; color: var(--muted); max-width: 62ch; margin: 0 0 28px; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; }
.button {
  display: inline-block; padding: 11px 18px; border-radius: 999px; text-decoration: none; font-weight: 600;
  border: 1px solid var(--line); color: var(--ink); background: var(--surface);
}
.button.primary { background: var(--accent); color: var(--on-accent); border-color: var(--accent); }
.meta { margin-top: 18px; color: var(--muted); font-size: 0.9em; }

/* Sections */
section { padding: 48px 0; border-top: 1px solid var(--line); scroll-margin-top: 56px; }
section h2 { font-size: 1.75rem; margin: 0 0 8px; }
.intro { color: var(--muted); max-width: 70ch; margin: 0 0 28px; }
.grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; }
.card h3 { margin: 0 0 6px; font-size: 1.05rem; }
.card p { margin: 0; color: var(--muted); }
.card.good { border-left: 4px solid var(--good); }
.card.warn { border-left: 4px solid var(--warn); }
.two { display: grid; gap: 28px; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); align-items: start; }
ul.clean { padding-left: 1.1em; margin: 0; }
ul.clean li { margin: 6px 0; }
.note { background: var(--accent-soft); border-radius: var(--radius); padding: 14px 18px; }

/* Flow diagram */
.flow { display: grid; gap: 12px; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); counter-reset: step; }
.flow .step { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; position: relative; }
.flow .step::before {
  counter-increment: step; content: counter(step);
  display: inline-grid; place-items: center; width: 28px; height: 28px; border-radius: 50%;
  background: var(--accent-soft); color: var(--accent); font-weight: 700; margin-bottom: 8px;
}
.flow .step h3 { margin: 0 0 4px; font-size: 1rem; }
.flow .step p { margin: 0; color: var(--muted); font-size: 0.95em; }

/* Tables */
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
table { border-collapse: collapse; width: 100%; min-width: 560px; }
th, td { text-align: left; padding: 12px 14px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-size: 0.85em; text-transform: uppercase; letter-spacing: 0.04em; color: var(--muted); }
tr:last-child td { border-bottom: none; }

/* Terminal mock */
.terminal { background: #15171c; color: #d9dde6; border-radius: var(--radius); padding: 18px; overflow-x: auto; border: 1px solid #2a2e36; }
.terminal pre { background: none; border: none; padding: 0; margin: 0; color: inherit; }
.terminal .you { color: #8fb4ff; }
.terminal .dim { color: #8a91a0; }

details { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 18px; margin: 10px 0; }
summary { cursor: pointer; font-weight: 600; }
details p { color: var(--muted); margin: 10px 0 0; }

footer { border-top: 1px solid var(--line); padding: 32px 0 48px; color: var(--muted); font-size: 0.92em; }

@media (max-width: 640px) {
  body { font-size: 16px; }
  .top nav { display: none; }
  .hero { padding-top: 48px; padding-bottom: 32px; }
}