:root {
  --bg: #ffffff;
  --panel: #fafafa;
  --border: #e4e4e7;
  --text: #18181b;
  --muted: #71717a;
  --accent: #18181b;
  --code-bg: #f4f4f5;
  --radius: 6px;
  --measure: 66ch;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b0b0d;
    --panel: #131316;
    --border: #26262b;
    --text: #ededf0;
    --muted: #9a9aa3;
    --accent: #ededf0;
    --code-bg: #141418;
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.65 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-feature-settings: "kern", "liga";
}

a { color: var(--accent); text-decoration: underline; text-underline-offset: 2px; }
a:hover { text-decoration-thickness: 2px; }

.bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
  max-width: 980px;
  margin: 0 auto;
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-weight: 600;
  letter-spacing: -0.01em;
  text-decoration: none;
}

.nav { display: flex; gap: 20px; font-size: 14px; }
.nav a { color: var(--muted); text-decoration: none; }
.nav a:hover { color: var(--text); }

main { max-width: 980px; margin: 0 auto; padding: 0 24px 64px; }

.hero { padding: 56px 0 40px; border-bottom: 1px solid var(--border); }

.eyebrow {
  margin: 0 0 14px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

h1 {
  margin: 0 0 18px;
  max-width: 22ch;
  font-size: 38px;
  line-height: 1.18;
  letter-spacing: -0.025em;
  font-weight: 650;
}

.lede { margin: 0 0 16px; max-width: var(--measure); font-size: 17px; color: var(--text); }
.meta { margin: 0; font-size: 14px; color: var(--muted); }

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
  padding: 40px 0;
}

.card {
  padding: 20px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.card h2 { margin: 0 0 8px; font-size: 15px; font-weight: 600; letter-spacing: -0.005em; }
.card p { margin: 0; font-size: 14px; color: var(--muted); }

.sample, .notes, .prose { padding: 32px 0; border-top: 1px solid var(--border); }

h2 { font-size: 22px; line-height: 1.3; letter-spacing: -0.015em; font-weight: 620; }
.sample > h2, .notes > h2, .prose > h2 { margin: 0 0 12px; }

h3 { margin: 28px 0 8px; font-size: 16px; font-weight: 600; }

.sample p, .notes p, .prose p, .prose li { max-width: var(--measure); }
.notes p { color: var(--muted); }

pre {
  margin: 18px 0;
  padding: 16px 18px;
  overflow-x: auto;
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 13.5px;
  line-height: 1.6;
}

code {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
}

p code, li code, td code {
  padding: 1px 5px;
  font-size: 0.9em;
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 4px;
}

pre code { padding: 0; background: none; border: 0; }

table {
  width: 100%;
  margin: 18px 0;
  border-collapse: collapse;
  font-size: 14px;
}

th, td {
  padding: 9px 12px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

th { font-weight: 600; color: var(--muted); font-size: 13px; }

.dl { margin: 18px 0; }
.dl dt { margin-top: 14px; font-weight: 600; font-size: 15px; }
.dl dd { margin: 4px 0 0; max-width: var(--measure); color: var(--muted); font-size: 14px; }

.foot {
  max-width: 980px;
  margin: 0 auto;
  padding: 24px;
  border-top: 1px solid var(--border);
  font-size: 13px;
  color: var(--muted);
}

.foot p { margin: 0; }
.foot a { color: var(--muted); text-decoration: none; }
.foot a:hover { color: var(--text); }

.notfound { padding: 80px 0 56px; }
.notfound h1 { font-size: 30px; }

@media (max-width: 620px) {
  h1 { font-size: 29px; }
  .hero { padding: 36px 0 28px; }
}