:root {
  --ink: #1f2430;
  --accent: #0a7d33;
  --muted: #5c6470;
  --card: #f6f7f4;
  --line: #dcded8;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: system-ui, sans-serif;
  color: var(--ink);
  line-height: 1.65;
}
main { max-width: 46rem; margin: 0 auto; padding: 0 1rem 3rem; }
a { color: var(--accent); }

.site-header {
  display: flex; flex-wrap: wrap; gap: 1rem; align-items: baseline;
  justify-content: space-between;
  max-width: 46rem; margin: 0 auto; padding: 1rem;
  border-bottom: 2px solid var(--ink);
}
.brand { font-weight: 700; font-size: 1.2rem; text-decoration: none; color: var(--ink); }
.site-header nav a { margin-right: .75rem; text-decoration: none; }

.hero h1 { font-size: 2rem; line-height: 1.2; }
.subtitle { color: var(--muted); font-style: italic; margin-top: -0.5rem; }
.crumbs { color: var(--muted); font-size: .85rem; }

.chapter-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(13rem, 1fr)); gap: 1rem; }
.chapter-list { display: grid; gap: 1rem; margin-top: 1.5rem; }

.card {
  display: block; padding: 1rem 1.1rem; background: var(--card);
  border: 1px solid var(--line); border-left: 4px solid var(--accent);
  text-decoration: none; color: var(--ink);
}
.card h2 { margin: 0 0 .3rem; font-size: 1.05rem; color: var(--accent); }
.card p { margin: 0; color: var(--muted); font-size: .9rem; }

.pager { display: flex; justify-content: space-between; gap: 1rem; margin-top: 2rem; }
.pager a { text-decoration: none; }

.site-footer {
  border-top: 1px solid var(--line); color: var(--muted);
  max-width: 46rem; margin: 0 auto; padding: 1rem; font-size: .85rem;
}