.tabs { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.chapter-mark { display: flex; flex-direction: column; align-items: flex-end; gap: 8px; }
.favorite-button {
  min-height: 44px; padding: 8px 12px; border: 1px solid var(--line);
  border-radius: 8px; color: var(--whole-ink); background: var(--whole-button);
  font: 13px/1.5 var(--sans); white-space: nowrap;
}
.favorite-button[aria-pressed="true"] { background: var(--whole-selected); border-color: var(--sage); }
.lesson-extras { margin: -8px 0 20px; border-bottom: 1px solid var(--line); }
.lesson-extras > summary {
  min-height: 44px; padding: 10px 0; color: var(--whole-ink);
  font-size: 13px; line-height: 1.8; cursor: pointer;
}
.lesson-extras-body { padding: 4px 0 24px; }
.deep-reading-section { margin-top: 24px; padding: 22px; background: var(--whole-button); border: 1px solid var(--line); border-radius: 10px; }
.deep-reading-section > h2 { margin: 0 0 14px; font: 500 22px/1.5 var(--serif); color: var(--ink); }
.deep-reading-heading { margin: 0 0 20px; color: var(--whole-ink); font: 18px/1.7 var(--serif); }
.deep-reading-point + .deep-reading-point { margin-top: 20px; }
.deep-reading-point h3 { margin: 0 0 6px; font: 500 15px/1.8 var(--sans); color: var(--whole-ink); }
.deep-reading-point p { margin: 0; font: 15px/2 var(--sans); color: var(--ink); overflow-wrap: anywhere; }
.practice-toolbar .level-buttons { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.independent-stage {
  padding: 44px 24px; margin: 20px 0; text-align: center;
  border: 1px solid var(--line); border-radius: 12px; background: var(--whole-button);
}
.independent-stage > span { font: 50px/1.5 Georgia, serif; color: var(--sage); }
.independent-stage h3 { margin: 12px 0; font: 500 24px/1.6 var(--serif); }
.independent-stage p { max-width: 28em; margin: 0 auto; font: 14px/1.9 var(--sans); color: var(--muted); }
#independentStage[hidden], #practiceManuscript[hidden] { display: none !important; }
.recitation-manuscript.is-independent .recitation-art { display: none; }
.recitation-manuscript.is-independent .recitation-passage { grid-template-columns: minmax(0, 1fr); gap: 0; padding: 16px 0; }
.recitation-manuscript.is-independent .recitation-writing { padding: 0 10px; }
.recitation-manuscript.is-independent .recitation-number { display: none; }
.recitation-manuscript.is-independent .practice-verse { margin-top: 0; }
.contents-button:disabled { opacity: .4; cursor: default; }
@media (max-width: 699px) {
  .tabs { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .lesson-heading { gap: 10px; }
  .chapter-mark { padding-top: 8px; flex-shrink: 0; }
  .chapter-mark > span { display: none; }
  .favorite-button { padding: 8px 10px; font-size: 12px; }
  .lesson-extras { margin: -10px 0 16px; }
  .lesson-extras > summary { font-size: 12px; }
  .deep-reading-section { padding: 18px 15px; }
  .deep-reading-point p { font-size: 14px; }
  .practice-toolbar .level-buttons { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .practice-toolbar .level-buttons button:nth-child(2) { border-right: 0; }
  .practice-toolbar .level-buttons button:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .independent-stage { padding: 28px 16px; }
  .independent-stage h3 { font-size: 22px; }
}