/* Scoped to the catalogue; the existing reading layout stays consistent. */
.practice-controls {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: .65rem;
  padding: .85rem;
  border: 1px solid var(--lesson-border);
  border-radius: .4rem;
  background: var(--lesson-surface);
}
.practice-controls[hidden], .practice-item[hidden], .practice-section[hidden], .practice-chapter[hidden],
.practice-empty[hidden], .practice-storage-note[hidden] { display: none !important; }
.practice-controls label { font-size: .64rem; font-weight: 600; }
.practice-controls :is(input[type="search"], select) {
  display: block;
  width: 100%;
  min-width: 0;
  margin-top: .25rem;
  padding: .45rem;
  border: 1px solid var(--lesson-border);
  border-radius: .25rem;
  background: var(--md-default-bg-color);
  color: var(--md-default-fg-color);
  font: inherit;
}
.practice-controls input:focus-visible, .practice-controls select:focus-visible, .practice-check:focus-visible {
  outline: 2px solid var(--md-accent-fg-color);
  outline-offset: 2px;
}
.practice-controls .practice-core-toggle { grid-column: 1 / -1; display: flex; align-items: center; gap: .4rem; }
.practice-controls input[type="checkbox"], .practice-check { accent-color: var(--md-accent-fg-color); width: .85rem; height: .85rem; flex-shrink: 0; }
.md-typeset .practice-progress { font-weight: 650; margin: .7rem 0 .15rem; }
.md-typeset .practice-storage-note { margin: 0 0 .9rem; font-size: .63rem; color: var(--md-default-fg-color--light); }
.md-typeset details.practice-section { border: 1px solid var(--lesson-border); border-radius: .35rem; font-size: .72rem; padding: 0 .75rem; }
.md-typeset details.practice-section > summary { background: var(--lesson-surface); padding: .65rem 2rem .65rem .75rem; margin: 0 -.75rem; font-size: .73rem; }
.md-typeset details.practice-section > summary::before { display: none; }
.section-count { color: var(--md-default-fg-color--light); font-size: .62rem; font-weight: 400; margin-left: .35rem; }
.md-typeset ol.practice-list { padding: 0; margin: .8rem 0; list-style: none; }
.md-typeset .practice-list > li.practice-item { display: flex; gap: .55rem; margin: 0; padding: .65rem 0; border-top: 1px solid var(--lesson-border); }
.practice-check-label { position: relative; display: flex; align-items: start; padding: .18rem .15rem; cursor: pointer; }
.practice-problem { min-width: 0; flex: 1; }
.md-typeset .practice-problem > p { margin: 0 0 .25rem; }
.md-typeset .practice-problem > :is(p:first-child, strong:first-child) { font-size: .71rem; }
.md-typeset .practice-pattern { font-size: .61rem; color: var(--md-default-fg-color--light); line-height: 1.65; }
.practice-badges { display: flex; flex-wrap: wrap; gap: .25rem; margin: .3rem 0; }
.practice-badge { display: inline-block; border: 1px solid var(--lesson-border); border-radius: .2rem; padding: .06rem .35rem; font-size: .55rem; line-height: 1.7; }
.practice-badge.is-course { background: var(--lesson-active); color: var(--lesson-active-ink); border-color: var(--md-accent-fg-color); }
.practice-badge.is-core { font-weight: 650; color: var(--md-default-fg-color); background: var(--lesson-surface); }
.practice-badge.is-support { color: var(--md-default-fg-color--light); }
.md-typeset details.reading-path { border: 0; box-shadow: none; padding: 0; margin: .35rem 0 0; font-size: .65rem; }
.md-typeset details.reading-path > summary { background: transparent; margin: 0; padding: .2rem 1.3rem .2rem 0; font-size: .62rem; color: var(--md-typeset-a-color); }
.md-typeset details.reading-path > summary::before { display: none; }
.md-typeset details.reading-path[open] > summary { margin-bottom: .4rem; }
.practice-item.is-complete .practice-problem > :is(p:first-child, strong:first-child) a { text-decoration: underline; text-decoration-style: dotted; text-underline-offset: .2em; }
@media (max-width: 700px) {
  .practice-controls { grid-template-columns: 1fr 1fr; padding: .65rem; }
  .practice-controls label:first-child { grid-column: 1 / -1; }
  .md-typeset details.practice-section { padding: 0 .5rem; }
  .md-typeset details.practice-section > summary { margin: 0 -.5rem; padding-left: .5rem; }
}
@media (max-width: 360px) {
  .practice-controls { grid-template-columns: 1fr; }
}