:root {
  /* ── Brand colors ────────────────────────────── */
  --el-brand: #1e6249;
  --el-brand-rgb: 30, 98, 73;
  --el-brand-light: #278563;
  --el-brand-dark: #164a38;
  --el-brand-bg: rgba(30, 98, 73, 0.06);
  --el-brand-bg-hover: rgba(30, 98, 73, 0.10);

  /* ── Override Bootstrap primary ──────────────── */
  --bs-primary: #1e6249;
  --bs-primary-rgb: 30, 98, 73;
  --bs-link-color: #1e6249;
  --bs-link-hover-color: #278563;

  /* ── Accordion ───────────────────────────────── */
  --bs-accordion-active-color: #164a38;
  --bs-accordion-active-bg: rgba(30, 98, 73, 0.06);
  --bs-accordion-btn-focus-box-shadow: 0 0 0 0.25rem rgba(30, 98, 73, 0.25);

  /* ── Shadows ─────────────────────────────────── */
  --el-shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
  --el-shadow: 0 4px 12px rgba(0, 0, 0, 0.06), 0 1px 3px rgba(0, 0, 0, 0.04);
  --el-shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.08), 0 4px 8px rgba(0, 0, 0, 0.04);
  --el-shadow-hover: 0 12px 28px rgba(0, 0, 0, 0.1), 0 4px 8px rgba(0, 0, 0, 0.05);

  /* ── Radius ──────────────────────────────────── */
  --el-radius-sm: 8px;
  --el-radius: 12px;
  --el-radius-lg: 16px;
  --el-radius-xl: 20px;

  /* ── Detail page ─────────────────────────────── */
  --detail-bg-color: #f5f3f1;
  --detail-text-color: #2d3436;
  --detail-card-bg: #ffffff;
  --detail-card-shadow: var(--el-shadow-sm);
  --detail-border-color: #e8e6e3;
  --detail-accent-color: var(--el-brand);

  /* ── Chapter reader ──────────────────────────── */
  --chapter-bg-color: #F2EBE9;
  --chapter-text-color: #1A1A1D;
  --chapter-link-color: #2d3436;
}

[data-bs-theme="dark"] {
  --el-brand-bg: rgba(30, 98, 73, 0.12);
  --el-brand-bg-hover: rgba(30, 98, 73, 0.20);

  --bs-primary: #2ea87a;
  --bs-primary-rgb: 46, 168, 122;
  --bs-link-color: #2ea87a;
  --bs-link-hover-color: #3cc08e;

  --bs-accordion-active-color: #2ea87a;
  --bs-accordion-active-bg: rgba(30, 98, 73, 0.12);
  --bs-accordion-btn-focus-box-shadow: 0 0 0 0.25rem rgba(46, 168, 122, 0.25);

  --el-shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.2), 0 1px 2px rgba(0, 0, 0, 0.15);
  --el-shadow: 0 4px 12px rgba(0, 0, 0, 0.25), 0 1px 3px rgba(0, 0, 0, 0.15);
  --el-shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.3), 0 4px 8px rgba(0, 0, 0, 0.2);
  --el-shadow-hover: 0 12px 28px rgba(0, 0, 0, 0.35), 0 4px 8px rgba(0, 0, 0, 0.2);

  --detail-bg-color: #1a1a1a;
  --detail-text-color: #e0e0e0;
  --detail-card-bg: #242424;
  --detail-card-shadow: var(--el-shadow-sm);
  --detail-border-color: #333;
  --detail-accent-color: #2ea87a;

  --chapter-bg-color: #181a1b;
  --chapter-text-color: #ffffffcc;
  --chapter-link-color: #e0e0e0;
}