:root {
  --ink: #1a1a1a;
  --ink-soft: #444;
  --rule: #e5e5e5;
  --rule-soft: #f0f0f0;
  --accent: #c0392b;
  --bg: #fafaf7;
  --bg-card: #ffffff;
  --code-bg: #f4f1ec;
  --highlight: #fff8dc;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.65;
  color: var(--ink);
  background: var(--bg);
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
}
.wrap {
  max-width: 880px;
  margin: 0 auto;
  padding: 60px 40px 80px;
  background: var(--bg-card);
  box-shadow: 0 2px 24px rgba(0,0,0,0.04);
}
.breadcrumb {
  font-size: 13px;
  color: var(--ink-soft);
  margin-bottom: 20px;
}
.breadcrumb a { color: var(--accent); text-decoration: none; }
.breadcrumb a:hover { text-decoration: underline; }
header.cover {
  border-bottom: 3px solid var(--ink);
  padding-bottom: 28px;
  margin-bottom: 36px;
}
.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 12px;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 12px;
}
h1 {
  font-size: 32px;
  line-height: 1.2;
  margin: 0 0 12px;
  letter-spacing: -0.02em;
}
.subtitle {
  font-size: 16px;
  color: var(--ink-soft);
  margin: 8px 0;
}
.meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 16px;
  font-size: 13px;
  color: var(--ink-soft);
}
.meta span { padding: 4px 10px; background: var(--code-bg); border-radius: 4px; }
h2 {
  font-size: 22px;
  line-height: 1.3;
  margin: 48px 0 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--rule);
  letter-spacing: -0.01em;
}
h2 .num { color: var(--accent); font-weight: 600; margin-right: 10px; }
h3 { font-size: 18px; margin: 28px 0 10px; color: var(--ink); }
h4 {
  font-size: 14px;
  margin: 22px 0 8px;
  color: var(--ink-soft);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 600;
}
p { margin: 12px 0; }
blockquote {
  margin: 20px 0;
  padding: 16px 22px;
  background: var(--highlight);
  border-left: 4px solid var(--accent);
  border-radius: 0 6px 6px 0;
  font-style: italic;
}
blockquote p:first-child { margin-top: 0; }
blockquote p:last-child { margin-bottom: 0; }
ul, ol { padding-left: 22px; margin: 12px 0; }
li { margin: 6px 0; }
strong { color: var(--ink); font-weight: 600; }
em { color: var(--ink-soft); }
code {
  font-family: ui-monospace, "SF Mono", Monaco, Consolas, monospace;
  font-size: 13px;
  background: var(--code-bg);
  padding: 2px 6px;
  border-radius: 3px;
}
table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
  font-size: 14px;
}
th, td {
  text-align: left;
  padding: 10px 12px;
  border-bottom: 1px solid var(--rule);
  vertical-align: top;
}
th {
  background: var(--code-bg);
  font-weight: 600;
  border-bottom: 2px solid var(--ink);
}
tr:hover td { background: var(--rule-soft); }
.callout {
  background: #f0f7f0;
  border-left: 4px solid #4a7c4a;
  padding: 14px 18px;
  margin: 20px 0;
  border-radius: 0 6px 6px 0;
}
.callout.warn { background: #fff4e8; border-left-color: #d97706; }
.callout.decision { background: #f0f4fb; border-left-color: #3b6cb8; }
.pill {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.pill.done { background: #d4edda; color: #155724; }
.pill.open { background: #fff3cd; color: #856404; }
.pill.blocked { background: #f8d7da; color: #721c24; }
.studio-table a { color: var(--accent); text-decoration: none; font-weight: 500; }
.studio-table a:hover { text-decoration: underline; }
.studio-table a.muted { color: var(--ink-soft); pointer-events: none; cursor: default; }
hr { border: 0; border-top: 1px solid var(--rule); margin: 40px 0; }
footer {
  margin-top: 60px;
  padding-top: 24px;
  border-top: 1px solid var(--rule);
  color: var(--ink-soft);
  font-size: 13px;
}
footer .back { display: inline-block; margin-top: 16px; color: var(--accent); text-decoration: none; font-weight: 600; }
footer .back:hover { text-decoration: underline; }
.toc {
  background: var(--code-bg);
  border-radius: 8px;
  padding: 20px 28px;
  margin: 28px 0;
}
.toc h3 { margin-top: 0; font-size: 14px; text-transform: uppercase; letter-spacing: 0.08em; color: var(--ink-soft); }
.toc ol { margin: 8px 0 0; padding-left: 20px; }
.toc a { color: var(--ink); text-decoration: none; }
.toc a:hover { color: var(--accent); text-decoration: underline; }
.section-divider {
  text-align: center;
  margin: 60px 0 40px;
  color: var(--ink-soft);
  letter-spacing: 0.3em;
  font-size: 12px;
}
.doc-block {
  background: var(--bg);
  border-radius: 8px;
  padding: 30px 36px;
  margin: 30px 0;
  border: 1px solid var(--rule);
}
.doc-block .doc-eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 11px;
  color: var(--accent);
  font-weight: 700;
  margin-bottom: 4px;
}
.doc-block h3 { margin-top: 0; }
.doc-block .standalone-link {
  display: inline-block;
  margin-top: 8px;
  font-size: 13px;
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
}
.doc-block .standalone-link:hover { text-decoration: underline; }
.persona {
  display: inline-block;
  font-weight: 600;
  color: var(--accent);
}
@media print {
  body { background: white; }
  .wrap { box-shadow: none; padding: 0; max-width: 100%; }
  .toc { background: white; border: 1px solid var(--rule); }
  h2 { page-break-after: avoid; }
  blockquote, .callout, table { page-break-inside: avoid; }
  .breadcrumb, .standalone-link, footer .back { display: none; }
}
@media (max-width: 700px) {
  .wrap { padding: 32px 20px; }
  h1 { font-size: 26px; }
  h2 { font-size: 19px; }
  table { font-size: 13px; }
  th, td { padding: 8px; }
}