:root {
  --rust: #8B2500;
  --gold: #C9922A;
  --cream: #FAF6F0;
  --ink: #1A1A1A;
  --mid: #555;
  --border: #DDD5C8;
  --seed-bg: #FFF8F0;
  --evidence-v: #1a7340;
  --evidence-pv: #1a5c8a;
  --evidence-d: #8a3a1a;
  --evidence-yv: #6b5c00;
  --evidence-o: #555;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: 'Georgia', serif;
  background: var(--cream);
  color: var(--ink);
  line-height: 1.8;
  font-size: 18px;
}
.site-header {
  background: var(--rust);
  color: white;
  padding: 12px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 8px rgba(0,0,0,0.3);
}
.site-header a { color: #FFD580; text-decoration: none; font-size: 14px; }
.site-header a:hover { text-decoration: underline; }
.site-title { font-size: 16px; font-weight: bold; letter-spacing: 0.5px; }
.chapter-nav {
  display: flex;
  gap: 16px;
  align-items: center;
  font-size: 14px;
}
.chapter-body {
  max-width: 820px;
  margin: 0 auto;
  padding: 40px 24px 80px;
}
/* TOC Seed Block (intro) */
.toc-seed {
  background: var(--seed-bg);
  border-left: 4px solid var(--gold);
  border-radius: 4px;
  padding: 24px 28px;
  margin-bottom: 40px;
}
.toc-seed summary {
  cursor: pointer;
  font-size: 14px;
  color: var(--mid);
  font-style: italic;
  list-style: none;
  padding: 4px 0;
}
.toc-seed summary::before { content: "▶ "; }
details[open] .toc-seed summary::before { content: "▼ "; }
details.seed-block { margin-bottom: 32px; }
/* Opening quote */
.opening-quote {
  border-left: 3px solid var(--gold);
  padding: 16px 20px;
  margin: 24px 0;
  font-style: italic;
  color: #333;
  font-size: 1.05em;
}
.opening-quote cite {
  display: block;
  font-size: 0.85em;
  color: var(--mid);
  font-style: normal;
  margin-top: 8px;
}
/* Chapter title */
h1.chapter-title {
  font-size: 2em;
  color: var(--rust);
  border-bottom: 2px solid var(--gold);
  padding-bottom: 12px;
  margin-bottom: 8px;
  line-height: 1.3;
}
.chapter-meta {
  font-size: 14px;
  color: var(--mid);
  margin-bottom: 32px;
}
/* Section headings */
h2 { font-size: 1.3em; color: var(--rust); margin: 40px 0 12px; padding-bottom: 4px; border-bottom: 1px solid var(--border); }
h3 { font-size: 1.1em; color: #444; margin: 24px 0 8px; }
h4 { font-size: 1em; color: #555; margin: 16px 0 6px; }
p { margin-bottom: 16px; }
blockquote {
  border-left: 3px solid var(--gold);
  padding: 8px 16px;
  color: #444;
  font-style: italic;
  margin: 20px 0;
}
/* Evidence labels */
.ev { display: inline-block; font-size: 11px; font-weight: bold; padding: 1px 5px; border-radius: 3px; vertical-align: super; line-height: 1; margin-left: 2px; cursor: help; white-space: nowrap; }
.ev-V  { background: #e8f5ee; color: var(--evidence-v); border: 1px solid #b8dfc7; }
.ev-PV { background: #e8f2fa; color: var(--evidence-pv); border: 1px solid #b0d0e8; }
.ev-D  { background: #fdf0e8; color: var(--evidence-d); border: 1px solid #e8c4a8; }
.ev-YV { background: #fdfbe8; color: var(--evidence-yv); border: 1px solid #e0d890; }
.ev-O  { background: #f5f5f5; color: #555; border: 1px solid #ccc; }
.ev-F  { background: #f0f0f8; color: #446; border: 1px solid #c0c0d8; }
.ev-OT { background: #f8f0f8; color: #644; border: 1px solid #d8b8d8; }
/* Back matter */
.back-matter { border-top: 2px solid var(--border); margin-top: 60px; padding-top: 32px; }
.back-matter h2 { color: #333; font-size: 1.1em; border-bottom: 1px solid var(--border); }
table { width: 100%; border-collapse: collapse; margin: 16px 0; font-size: 0.9em; }
th { background: var(--rust); color: white; padding: 8px 12px; text-align: left; }
td { padding: 8px 12px; border-bottom: 1px solid var(--border); }
tr:nth-child(even) td { background: #FAF6F0; }
/* MCT divider */
.mct-divider { text-align: center; color: var(--gold); font-weight: bold; margin: 40px 0 32px; font-size: 1.1em; letter-spacing: 1px; border: none; }
/* Bottom navigation */
.chapter-footer {
  border-top: 2px solid var(--border);
  padding-top: 24px;
  margin-top: 60px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}
.btn {
  display: inline-block;
  padding: 10px 20px;
  background: var(--rust);
  color: white;
  text-decoration: none;
  border-radius: 4px;
  font-size: 14px;
  transition: background 0.2s;
}
.btn:hover { background: #a83000; }
.btn-outline {
  background: transparent;
  color: var(--rust);
  border: 2px solid var(--rust);
}
.btn-outline:hover { background: var(--rust); color: white; }
@media (max-width: 640px) {
  body { font-size: 16px; }
  .chapter-body { padding: 20px 16px 60px; }
  h1.chapter-title { font-size: 1.5em; }
  .site-header { flex-direction: column; gap: 8px; }
}