:root {
  --bg: #f5f0e8;
  --bg-card: #fffdf7;
  --bg-dark: #2c2418;
  --text: #2c2418;
  --text-muted: #6b5d4d;
  --accent: #8b4513;
  --accent-light: #d4a574;
  --border: #d4c4a8;
  --font-serif: 'Georgia', 'Times New Roman', serif;
  --font-sans: system-ui, -apple-system, sans-serif;
  --radius: 6px;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Header */
header {
  background: var(--bg-dark);
  color: #f5f0e8;
  padding: 1.5rem 2rem;
  border-bottom: 3px solid var(--accent);
}
header h1 { font-family: var(--font-serif); font-size: 1.6rem; font-weight: normal; }
header .subtitle { color: var(--accent-light); font-size: 0.9rem; margin-top: .25rem; }
nav a { color: var(--accent-light); margin-right: 1.5rem; font-size: 0.9rem; }
nav { margin-top: .75rem; }

/* Main content */
main { max-width: 1200px; margin: 0 auto; padding: 2rem; }

/* Book sections */
.book-section { margin-bottom: 3rem; }
.book-header {
  border-bottom: 2px solid var(--accent-light);
  margin-bottom: 1.5rem;
  padding-bottom: .5rem;
  display: flex;
  align-items: baseline;
  gap: 1rem;
}
.book-header h2 { font-family: var(--font-serif); color: var(--accent); font-size: 1.4rem; }
.book-stats { font-size: .85rem; color: var(--text-muted); }

/* Epistles section */
.epistles-section { margin-bottom: 2rem; }

/* Card grid */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
}
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.2rem;
  transition: box-shadow .15s, border-color .15s;
  cursor: pointer;
  display: block;
  color: var(--text);
  text-decoration: none;
}
.card:hover {
  box-shadow: 0 3px 12px rgba(139,69,19,.15);
  border-color: var(--accent-light);
  text-decoration: none;
}
.card-label { font-size: .75rem; color: var(--text-muted); margin-bottom: .25rem; }
.card-title {
  font-family: var(--font-serif);
  font-size: .95rem;
  font-weight: bold;
  margin-bottom: .4rem;
  line-height: 1.3;
}
.card-title em { font-style: italic; font-weight: normal; font-size: .88rem; color: var(--text-muted); }
.card-blurb { font-size: .83rem; color: var(--text-muted); line-height: 1.45; margin-bottom: .6rem; }

/* Badges */
.badge {
  display: inline-block;
  font-size: .7rem;
  padding: .15rem .5rem;
  border-radius: 3px;
  font-weight: 600;
  letter-spacing: .03em;
}
.badge-new        { background: #fce8e8; color: #7b1818; border: 1px solid #e0b0b0; }
.badge-mostly-new { background: #fff0e0; color: #7b4010; border: 1px solid #e0c090; }
.badge-preserved  { background: #e8f5e8; color: #1a5c1a; border: 1px solid #a0d0a0; }
.badge-revised    { background: #e8f0fa; color: #1a3a6e; border: 1px solid #a0b8e0; }
.badge-expanded   { background: #ede0f5; color: #4a1a6e; border: 1px solid #c0a0e0; }
.badge-unknown    { background: #f0f0f0; color: #555; border: 1px solid #ccc; }

/* Filter bar */
.filter-bar {
  display: flex; gap: .75rem; margin-bottom: 2rem; flex-wrap: wrap; align-items: center;
}
.filter-bar input {
  flex: 1; min-width: 200px; padding: .45rem .75rem;
  border: 1px solid var(--border); border-radius: var(--radius);
  font-size: .9rem; background: var(--bg-card);
}
.filter-bar select {
  padding: .45rem .75rem; border: 1px solid var(--border);
  border-radius: var(--radius); background: var(--bg-card); font-size: .9rem;
}

/* Chapter page */
.chapter-page { max-width: 760px; }
.chapter-page .back-link { font-size: .85rem; margin-bottom: 1.5rem; display: inline-block; }
.chapter-page .chap-number { font-size: .85rem; color: var(--text-muted); margin-bottom: .25rem; }
.chapter-page h1 {
  font-family: var(--font-serif);
  font-size: 1.8rem;
  color: var(--accent);
  margin-bottom: .25rem;
  line-height: 1.2;
}
.chapter-page .latin-title {
  font-style: italic; color: var(--text-muted); font-family: var(--font-serif);
  font-size: 1rem; margin-bottom: 1rem;
}
.chapter-page .diff-box {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent-light);
  padding: 1rem 1.2rem;
  margin: 1.5rem 0;
  border-radius: 0 var(--radius) var(--radius) 0;
}
.chapter-page .diff-box h3 {
  font-size: .85rem; font-weight: 600; color: var(--text-muted);
  text-transform: uppercase; letter-spacing: .08em; margin-bottom: .5rem;
}
.chapter-page .diff-box p {
  font-family: var(--font-serif); font-size: .95rem; color: var(--text);
}
.chapter-page .essay { font-family: var(--font-serif); font-size: 1rem; line-height: 1.75; }
.chapter-page .essay p { margin-bottom: 1.25rem; }

/* Scholarly section */
.scholarly-section {
  margin-top: 2rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent);
  border-radius: 0 var(--radius) var(--radius) 0;
  overflow: hidden;
}
.argument-block {
  padding: 1.2rem 1.4rem 1rem;
  border-bottom: 1px solid var(--border);
  border-left: 3px solid #8aad7a;
  margin-left: -4px;
}
.debate-block {
  padding: 1.2rem 1.4rem 1rem;
}
.scholarly-section h3 {
  font-size: .75rem; font-weight: 700; color: var(--accent);
  text-transform: uppercase; letter-spacing: .1em; margin-bottom: .65rem;
}
.argument-block h3 { color: #5a7a4a; }
.scholarly-section p {
  font-family: var(--font-serif); font-size: .95rem; line-height: 1.7;
  color: var(--text);
}

/* Footer */
footer {
  text-align: center; padding: 2rem; font-size: .8rem;
  color: var(--text-muted); border-top: 1px solid var(--border);
  margin-top: 4rem;
}