/* ─────────────────────────────────────────────────────────────────
   Lesson section search bar — sits between the lesson header and the
   first content block. Quiet pill on the cream paper; dropdown of
   matching headings on focus / typing. Honey accent on the focus
   ring + match highlight to fit the IELTS aesthetic.
   ───────────────────────────────────────────────────────────── */

.lesson-toc {
  position: relative;
  margin: 1.4rem 0 1.6rem;
  font-family: 'Inter', system-ui, sans-serif;
}

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

.lesson-toc-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--paper-ink-mute, #7A6A55);
  pointer-events: none;
  transition: color .15s;
}

.lesson-toc-input {
  flex: 1;
  width: 100%;
  background: rgba(255, 255, 255, .45);
  border: 1px solid rgba(31, 24, 18, .12);
  border-radius: 999px;
  padding: 11px 40px 11px 40px;
  font-family: inherit;
  font-size: .9rem;
  color: var(--paper-ink, #1F1812);
  outline: none;
  transition: border-color .15s, background-color .15s, box-shadow .2s;
}
.lesson-toc-input::placeholder {
  color: var(--paper-ink-mute, #7A6A55);
  font-style: italic;
}
.lesson-toc-input:focus {
  border-color: var(--paper-honey, #B57A2E);
  background: rgba(255, 255, 255, .82);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--paper-honey, #B57A2E) 18%, transparent);
}
.lesson-toc-input-wrap:focus-within .lesson-toc-icon {
  color: var(--paper-honey, #B57A2E);
}

.lesson-toc-clear {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  background: transparent;
  border: 0;
  color: var(--paper-ink-mute, #7A6A55);
  cursor: pointer;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color .15s, color .15s;
}
.lesson-toc-clear:hover {
  background: rgba(31, 24, 18, .08);
  color: var(--paper-ink, #1F1812);
}

.lesson-toc-results {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  right: 0;
  background:
    linear-gradient(180deg, rgba(255, 250, 232, .98) 0%, rgba(245, 235, 211, .98) 100%);
  border: 1px solid rgba(31, 24, 18, .12);
  border-radius: 14px;
  padding: 6px;
  box-shadow:
    0 1px 0 rgba(255, 255, 255, .55) inset,
    0 8px 22px -6px rgba(0, 0, 0, .25),
    0 22px 44px -16px rgba(0, 0, 0, .2);
  z-index: 18;
  max-height: 360px;
  overflow-y: auto;
}

.lesson-toc-result {
  display: block;
  width: 100%;
  text-align: left;
  background: transparent;
  border: 0;
  padding: 9px 14px;
  border-radius: 9px;
  font: inherit;
  font-size: .9rem;
  line-height: 1.4;
  color: var(--paper-ink, #1F1812);
  cursor: pointer;
  transition: background-color .12s, transform .12s;
}
.lesson-toc-result:hover,
.lesson-toc-result.is-active {
  background: rgba(255, 255, 255, .7);
  transform: translateX(2px);
}
.lesson-toc-result mark {
  background: color-mix(in srgb, var(--paper-honey, #B57A2E) 28%, transparent);
  color: var(--paper-honey-deep, #8B5A1C);
  font-weight: 600;
  padding: 1px 3px;
  border-radius: 3px;
}

.lesson-toc-empty {
  padding: 14px 16px;
  font-size: .84rem;
  color: var(--paper-ink-mute, #7A6A55);
  font-style: italic;
  margin: 0;
  text-align: center;
}

/* Brief honey-tinted flash on the heading after a jump-to. */
.rd-h2.is-toc-flash {
  background-color: color-mix(in srgb, var(--paper-honey, #B57A2E) 16%, transparent);
  border-radius: 6px;
  padding: 2px 6px;
  margin-left: -6px;
  transition: background-color .9s ease, padding .3s ease;
}
.rd-h2:not(.is-toc-flash) {
  transition: background-color .9s ease, padding .3s ease;
}

/* Mobile — compress a touch */
@media (max-width: 720px) {
  .lesson-toc { margin: 1rem 0 1.2rem; }
  .lesson-toc-input { padding: 10px 36px 10px 38px; font-size: .85rem; }
  .lesson-toc-icon { left: 12px; }
  .lesson-toc-clear { right: 10px; }
}