:root {
  --bg: #fbfbfa;
  --surface: #ffffff;
  --sidebar: #f3f3f1;
  --text: #1d1f23;
  --muted: #5d636d;
  --border: #e2e2de;
  --accent: #2f5bd3;
  --accent-soft: #e8eefc;
  --code-bg: #f1f1ee;
  --pre-bg: #1e2127;
  --pre-text: #e6e6e6;
  --ok: #1f7a4d;
  --ok-soft: #e4f4ec;
  --warn: #8a5a00;
  --warn-soft: #fbf1dc;
  --bad: #a3322b;
  --bad-soft: #fbe6e4;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Helvetica, Arial, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #15171b;
    --surface: #1b1e23;
    --sidebar: #191b20;
    --text: #e4e6ea;
    --muted: #9aa1ac;
    --border: #2c3038;
    --accent: #8aa8ff;
    --accent-soft: #232c45;
    --code-bg: #262a31;
    --pre-bg: #0f1114;
    --pre-text: #e6e6e6;
    --ok: #6fd3a0;
    --ok-soft: #1c3329;
    --warn: #e8c070;
    --warn-soft: #362c17;
    --bad: #f0928b;
    --bad-soft: #3a2220;
  }
}
:root[data-theme="dark"] {
  --bg: #15171b;
  --surface: #1b1e23;
  --sidebar: #191b20;
  --text: #e4e6ea;
  --muted: #9aa1ac;
  --border: #2c3038;
  --accent: #8aa8ff;
  --accent-soft: #232c45;
  --code-bg: #262a31;
  --pre-bg: #0f1114;
  --pre-text: #e6e6e6;
  --ok: #6fd3a0;
  --ok-soft: #1c3329;
  --warn: #e8c070;
  --warn-soft: #362c17;
  --bad: #f0928b;
  --bad-soft: #3a2220;
}

* { box-sizing: border-box; }
html { scroll-padding-top: 16px; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 var(--sans);
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.layout { display: grid; grid-template-columns: 260px minmax(0, 1fr); min-height: 100vh; }
.sidebar {
  background: var(--sidebar);
  border-right: 1px solid var(--border);
  padding: 24px 18px;
  position: sticky; top: 0; height: 100vh; overflow-y: auto;
}
.brand { display: block; font-weight: 700; font-size: 17px; color: var(--text); margin-bottom: 4px; }
.brand-sub { color: var(--muted); font-size: 13px; margin-bottom: 22px; }
.nav-group { margin: 18px 0 6px; font-size: 12px; font-weight: 600; letter-spacing: .06em; text-transform: uppercase; color: var(--muted); }
.sidebar ul { list-style: none; margin: 0; padding: 0; }
.sidebar li a { display: block; padding: 5px 10px; border-radius: 6px; color: var(--text); font-size: 15px; }
.sidebar li a:hover { background: var(--accent-soft); text-decoration: none; }
.sidebar li a.active { background: var(--accent-soft); color: var(--accent); font-weight: 600; }

main { padding: 40px 56px 80px; max-width: 920px; }
main h1 { font-size: 34px; line-height: 1.2; margin: 0 0 8px; letter-spacing: -.01em; }
.lede { font-size: 18px; color: var(--muted); margin: 0 0 32px; }
main h2 { font-size: 24px; margin: 44px 0 12px; padding-top: 8px; border-top: 1px solid var(--border); }
main h3 { font-size: 18px; margin: 28px 0 8px; }
main p, main li { max-width: 74ch; }
code { font-family: var(--mono); font-size: .88em; background: var(--code-bg); padding: 1px 5px; border-radius: 4px; }
pre {
  position: relative;
  background: var(--pre-bg); color: var(--pre-text);
  padding: 14px 16px; border-radius: 8px; overflow-x: auto;
  font: 13.5px/1.55 var(--mono);
}
pre code { background: none; padding: 0; font-size: inherit; color: inherit; }
pre .c { color: #8b949e; }
.copy {
  position: absolute; top: 8px; right: 8px;
  font: 12px var(--sans); color: #c9d1d9; background: #30363d;
  border: 0; border-radius: 5px; padding: 3px 8px; cursor: pointer; opacity: .75;
}
.copy:hover { opacity: 1; }

table { border-collapse: collapse; width: 100%; margin: 12px 0 20px; font-size: 14.5px; display: block; overflow-x: auto; }
th, td { text-align: left; vertical-align: top; padding: 8px 10px; border-bottom: 1px solid var(--border); }
th { font-weight: 600; background: var(--sidebar); white-space: nowrap; }

.callout { border-left: 4px solid var(--accent); background: var(--accent-soft); padding: 12px 16px; border-radius: 0 8px 8px 0; margin: 18px 0; }
.callout.warn { border-color: var(--warn); background: var(--warn-soft); }
.callout.ok { border-color: var(--ok); background: var(--ok-soft); }
.callout > :first-child { margin-top: 0; }
.callout > :last-child { margin-bottom: 0; }

.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 14px; margin: 20px 0; }
.card { display: block; background: var(--surface); border: 1px solid var(--border); border-radius: 10px; padding: 16px 18px; color: var(--text); }
.card:hover { border-color: var(--accent); text-decoration: none; }
.card strong { display: block; margin-bottom: 4px; color: var(--accent); }
.card span { color: var(--muted); font-size: 14.5px; }

ol.steps { counter-reset: step; list-style: none; padding-left: 0; }
ol.steps > li { counter-increment: step; position: relative; padding-left: 42px; margin-bottom: 22px; }
ol.steps > li::before {
  content: counter(step); position: absolute; left: 0; top: 0;
  width: 28px; height: 28px; border-radius: 50%;
  background: var(--accent); color: var(--surface);
  font-weight: 700; font-size: 14px; display: grid; place-items: center;
}

.tag { display: inline-block; font-size: 12px; font-weight: 600; padding: 1px 8px; border-radius: 10px; white-space: nowrap; }
.tag.pass { background: var(--ok-soft); color: var(--ok); }
.tag.partial { background: var(--warn-soft); color: var(--warn); }
.tag.pending { background: var(--accent-soft); color: var(--accent); }
.tag.deferred { background: var(--code-bg); color: var(--muted); }

.diagram { width: 100%; height: auto; margin: 12px 0 24px; }
.diagram .box { fill: var(--surface); stroke: var(--border); stroke-width: 1.5; }
.diagram .box.hl { stroke: var(--accent); }
.diagram text { fill: var(--text); font: 13px var(--sans); }
.diagram .sub { fill: var(--muted); font-size: 11.5px; }
.diagram .edge { stroke: var(--muted); stroke-width: 1.4; fill: none; marker-end: url(#arrow); }
.diagram .arrowhead { fill: var(--muted); }

.pager { display: flex; justify-content: space-between; gap: 16px; margin-top: 56px; padding-top: 20px; border-top: 1px solid var(--border); }
.pager a { display: block; border: 1px solid var(--border); border-radius: 8px; padding: 10px 14px; background: var(--surface); }
.pager small { display: block; color: var(--muted); }
.footer { color: var(--muted); font-size: 13px; margin-top: 28px; }

.menu-toggle { display: none; }

@media (max-width: 860px) {
  .layout { grid-template-columns: 1fr; }
  .sidebar { position: static; height: auto; border-right: 0; border-bottom: 1px solid var(--border); padding: 14px 16px; }
  .sidebar nav { display: none; }
  .sidebar.open nav { display: block; }
  .menu-toggle { display: inline-block; float: right; background: none; border: 1px solid var(--border); color: var(--text); border-radius: 6px; padding: 4px 10px; font-size: 14px; }
  .brand-sub { margin-bottom: 0; }
  main { padding: 24px 16px 60px; }
  main h1 { font-size: 28px; }
}