/* ─────────────────────────────────────────────────────────────────
   Course-wide section search bar — lives at the top of a subject's
   lesson index (writing / reading). Renders on the dark IELTS shell
   so it uses the IELTS palette, not the cream-paper one. Each result
   shows the matching heading + the lesson it belongs to.
   ───────────────────────────────────────────────────────────── */

.lesson-toc {
  position: relative;
  margin: 0 0 2rem;
  font-family: 'Inter', system-ui, sans-serif;
  z-index: 5;
}

.lesson-toc-input-wrap {
  position: relative;
  display: flex;
  align-items: center;
}

.lesson-toc-icon {
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--ielts-ink-mute, #7A6A52);
  pointer-events: none;
  transition: color .15s;
}

.lesson-toc-input {
  flex: 1;
  width: 100%;
  background: var(--ielts-card, #322519);
  border: 1px solid var(--ielts-line-strong, rgba(242, 230, 204, .18));
  border-radius: 999px;
  padding: 13px 44px 13px 44px;
  font-family: inherit;
  font-size: .95rem;
  color: var(--ielts-ink, #F2E6CC);
  outline: none;
  transition: border-color .18s, background-color .18s, box-shadow .2s;
}
.lesson-toc-input::placeholder {
  color: var(--ielts-ink-mute, #7A6A52);
  font-style: italic;
}
.lesson-toc-input:focus {
  border-color: var(--ielts-honey, #D9A268);
  background: var(--ielts-card-lift, #3D2D1F);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--ielts-honey, #D9A268) 22%, transparent);
}
.lesson-toc-input-wrap:focus-within .lesson-toc-icon {
  color: var(--ielts-honey, #D9A268);
}

.lesson-toc-clear {
  position: absolute;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  background: transparent;
  border: 0;
  color: var(--ielts-ink-mute, #7A6A52);
  cursor: pointer;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color .15s, color .15s;
}
.lesson-toc-clear:hover {
  background: rgba(242, 230, 204, .12);
  color: var(--ielts-ink, #F2E6CC);
}

.lesson-toc-results {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  right: 0;
  background:
    linear-gradient(180deg, var(--ielts-card-lift, #3D2D1F) 0%, var(--ielts-card, #322519) 100%);
  border: 1px solid var(--ielts-line-strong, rgba(242, 230, 204, .18));
  border-radius: 14px;
  padding: 6px;
  box-shadow:
    0 1px 0 rgba(255, 255, 255, .04) inset,
    0 14px 32px -10px rgba(0, 0, 0, .55),
    0 28px 56px -22px rgba(0, 0, 0, .45);
  z-index: 18;
  max-height: 440px;
  overflow-y: auto;
}
.lesson-toc-results::-webkit-scrollbar { width: 8px; }
.lesson-toc-results::-webkit-scrollbar-thumb {
  background: rgba(242, 230, 204, .15);
  border-radius: 4px;
}

.lesson-toc-result {
  display: flex;
  flex-direction: column;
  gap: 3px;
  width: 100%;
  text-align: left;
  background: transparent;
  border: 0;
  padding: 11px 14px;
  border-radius: 9px;
  font: inherit;
  line-height: 1.4;
  color: var(--ielts-ink, #F2E6CC);
  cursor: pointer;
  transition: background-color .12s, transform .12s;
}
.lesson-toc-result:hover,
.lesson-toc-result.is-active {
  background: rgba(242, 230, 204, .08);
  transform: translateX(2px);
}
.lesson-toc-result-heading {
  font-family: 'Source Serif 4', Georgia, serif;
  font-size: .98rem;
  font-weight: 600;
  color: var(--ielts-ink, #F2E6CC);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.lesson-toc-result-lesson {
  font-family: 'Inter', system-ui, sans-serif;
  font-size: .68rem;
  letter-spacing: .12em;
  color: var(--ielts-honey, #D9A268);
  text-transform: uppercase;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 7px;
}
.lesson-toc-result-lesson::before {
  content: '';
  display: inline-block;
  width: 5px;
  height: 5px;
  background: var(--ielts-honey, #D9A268);
  border-radius: 50%;
  flex-shrink: 0;
  box-shadow: 0 0 6px color-mix(in srgb, var(--ielts-honey, #D9A268) 50%, transparent);
}
.lesson-toc-result mark {
  background: color-mix(in srgb, var(--ielts-honey, #D9A268) 32%, transparent);
  color: var(--ielts-honey, #D9A268);
  font-weight: 700;
  padding: 1px 4px;
  border-radius: 3px;
}

.lesson-toc-empty,
.lesson-toc-truncated {
  padding: 14px 16px;
  font-size: .82rem;
  color: var(--ielts-ink-mute, #7A6A52);
  font-style: italic;
  margin: 0;
  text-align: center;
}
.lesson-toc-truncated {
  border-top: 1px solid var(--ielts-line, rgba(242, 230, 204, .10));
  margin-top: 4px;
  padding-top: 10px;
}

/* Brief honey-tinted flash on the heading after a search-bar jump.
   This still lives on the cream-paper lesson body, so use the
   paper-honey variable. */
.rd-h2.is-toc-flash {
  background-color: color-mix(in srgb, var(--paper-honey, #B57A2E) 18%, transparent);
  border-radius: 6px;
  padding: 2px 8px;
  margin-left: -8px;
  transition: background-color .9s ease, padding .3s ease;
}
.rd-h2:not(.is-toc-flash) {
  transition: background-color .9s ease, padding .3s ease;
}

@media (max-width: 720px) {
  .lesson-toc { margin-bottom: 1.4rem; }
  .lesson-toc-input { padding: 11px 40px 11px 40px; font-size: .88rem; }
}