:root {
  --ink: #1a1a1a;
  --ink-soft: #444;
  --ink-mute: #6b6b6b;
  --paper: #fbfaf7;
  --paper-warm: #f5f2ea;
  --accent: #b85c2c;
  --rule: #e5e2d9;
  --code-bg: #f2efe6;
}

* { box-sizing: border-box; }

html { font-size: 17px; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: 'Charter', 'Iowan Old Style', 'Palatino', Georgia, serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.nav {
  border-bottom: 1px solid var(--rule);
  background: var(--paper);
  padding: 14px 24px;
  display: flex;
  align-items: center;
  gap: 24px;
  position: sticky;
  top: 0;
  z-index: 10;
}

.nav .brand {
  font-weight: 600;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: -0.01em;
  font-size: 15px;
}

.nav .brand .dot {
  color: var(--accent);
}

.nav .tabs {
  display: flex;
  gap: 4px;
  margin-left: auto;
}

.nav .tabs a {
  color: var(--ink-mute);
  text-decoration: none;
  padding: 6px 12px;
  border-radius: 4px;
  font-size: 14px;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

.nav .tabs a:hover {
  color: var(--ink);
  background: var(--paper-warm);
}

.nav .tabs a.active {
  color: var(--ink);
  background: var(--paper-warm);
  font-weight: 500;
}

main {
  max-width: 720px;
  margin: 0 auto;
  padding: 48px 24px 96px;
}

h1 {
  font-size: 2.1rem;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin: 0 0 8px;
  font-weight: 600;
}

h2 {
  font-size: 1.35rem;
  line-height: 1.3;
  margin: 42px 0 12px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

h3 {
  font-size: 1.1rem;
  margin: 28px 0 8px;
  font-weight: 600;
}

p {
  margin: 0 0 16px;
  color: var(--ink);
}

a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid rgba(184, 92, 44, 0.3);
}

a:hover {
  border-bottom-color: var(--accent);
}

strong {
  font-weight: 600;
  color: var(--ink);
}

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

li {
  margin-bottom: 6px;
}

code {
  background: var(--code-bg);
  padding: 1px 5px;
  border-radius: 3px;
  font-family: 'SF Mono', Menlo, Consolas, monospace;
  font-size: 0.88em;
  color: var(--ink);
}

pre code {
  display: block;
  padding: 14px 18px;
  overflow-x: auto;
  line-height: 1.45;
  font-size: 0.85rem;
}

hr {
  border: 0;
  border-top: 1px solid var(--rule);
  margin: 42px 0;
}

blockquote {
  border-left: 3px solid var(--accent);
  padding-left: 16px;
  color: var(--ink-soft);
  margin: 0 0 16px;
  font-style: italic;
}

.meta {
  color: var(--ink-mute);
  font-size: 0.9rem;
  margin-top: 4px;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

.references {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--rule);
  font-size: 0.92rem;
}

.references h2 {
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-mute);
  margin-top: 0;
}

.references ul {
  list-style: none;
  padding-left: 0;
}

.references li {
  margin-bottom: 8px;
  padding-left: 16px;
  text-indent: -16px;
}

.references li::before {
  content: "→ ";
  color: var(--accent);
}

footer {
  max-width: 720px;
  margin: 0 auto;
  padding: 24px;
  border-top: 1px solid var(--rule);
  color: var(--ink-mute);
  font-size: 0.85rem;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

@media print {
  .nav, footer { display: none; }
  body { background: white; }
  main { max-width: none; padding: 0; }
  a { color: var(--ink); border-bottom: none; }
  a[href]::after { content: " (" attr(href) ")"; font-size: 0.75em; color: var(--ink-mute); }
}