:root {
  --bg: #fafafa;
  --surface: #ffffff;
  --border: #e2e2e2;
  --text: #1a1a1a;
  --muted: #666666;
  --brand: #2a78d6;
  --good: #0ca30c;
  --warn: #b45309;
  --critical: #d03b3b;
  --code-bg: #f2f2f2;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121212;
    --surface: #1a1a1a;
    --border: #2e2e2e;
    --text: #ededed;
    --muted: #a0a0a0;
    --brand: #5b9cec;
    --good: #4ade80;
    --warn: #fbbf24;
    --critical: #f47174;
    --code-bg: #232323;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
}

.layout {
  display: flex;
  min-height: 100vh;
}

nav.sidebar {
  width: 240px;
  flex: none;
  background: var(--surface);
  border-right: 1px solid var(--border);
  padding: 24px 16px;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}

nav.sidebar .brand {
  font-weight: 700;
  font-size: 1.05rem;
  margin-bottom: 4px;
  display: block;
  color: var(--text);
  text-decoration: none;
}

nav.sidebar .tag {
  font-size: 0.75rem;
  color: var(--muted);
  margin-bottom: 20px;
  display: block;
}

nav.sidebar a.nav-link {
  display: block;
  padding: 8px 10px;
  border-radius: 8px;
  color: var(--muted);
  text-decoration: none;
  font-size: 0.92rem;
  margin-bottom: 2px;
}

nav.sidebar a.nav-link:hover {
  background: var(--code-bg);
  color: var(--text);
}

nav.sidebar a.nav-link.active {
  background: color-mix(in srgb, var(--brand) 15%, transparent);
  color: var(--brand);
  font-weight: 600;
}

nav.sidebar .section-label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
  margin: 20px 0 8px 10px;
}

main.content {
  flex: 1;
  min-width: 0;
  padding: 40px clamp(20px, 5vw, 64px);
  max-width: 860px;
}

h1 { font-size: 1.9rem; margin-top: 0; }
h2 { font-size: 1.35rem; margin-top: 2.2em; border-bottom: 1px solid var(--border); padding-bottom: 0.4em; }
h3 { font-size: 1.1rem; margin-top: 1.6em; }

p, li { color: var(--text); }
.muted { color: var(--muted); }

a { color: var(--brand); }

code, pre {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  background: var(--code-bg);
  border-radius: 6px;
}

code { padding: 0.15em 0.4em; font-size: 0.88em; }

pre {
  padding: 14px 16px;
  overflow-x: auto;
  border: 1px solid var(--border);
}
pre code { background: none; padding: 0; }

.callout {
  border: 1px solid var(--border);
  border-left: 4px solid var(--brand);
  background: var(--surface);
  border-radius: 8px;
  padding: 14px 16px;
  margin: 1.2em 0;
}
.callout.warn { border-left-color: var(--warn); }
.callout.critical { border-left-color: var(--critical); }
.callout.good { border-left-color: var(--good); }
.callout p:first-child { margin-top: 0; }
.callout p:last-child { margin-bottom: 0; }

.grid-links {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
  margin: 1.5em 0;
}

.grid-links a {
  display: block;
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: 10px;
  padding: 16px;
  text-decoration: none;
  color: var(--text);
}
.grid-links a:hover { border-color: var(--brand); }
.grid-links a .t { font-weight: 600; color: var(--brand); margin-bottom: 4px; display: block; }
.grid-links a .d { font-size: 0.88rem; color: var(--muted); }

table { border-collapse: collapse; width: 100%; margin: 1.2em 0; font-size: 0.92rem; }
th, td { border: 1px solid var(--border); padding: 8px 10px; text-align: left; }
th { background: var(--code-bg); }

.badge {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--warn) 20%, transparent);
  color: var(--warn);
  margin-left: 8px;
  vertical-align: middle;
}

footer.page-footer {
  margin-top: 3em;
  padding-top: 1.2em;
  border-top: 1px solid var(--border);
  font-size: 0.82rem;
  color: var(--muted);
}

@media (max-width: 720px) {
  .layout { flex-direction: column; }
  nav.sidebar { width: 100%; height: auto; position: static; border-right: none; border-bottom: 1px solid var(--border); }
  main.content { padding: 28px 20px; }
}