.questions-subject-page .subject-breadcrumb{
  margin-bottom: .5rem;
  font-size: .9rem;
  color: #64748b;
  display: flex;
  flex-wrap: wrap;
  gap: .35rem;
}

.questions-subject-page .subject-breadcrumb a{
  color: #1d4ed8;
  text-decoration: none;
}

.questions-subject-page .subject-breadcrumb a:hover{
  text-decoration: underline;
}

html[data-theme="dark"] .questions-subject-page .subject-breadcrumb{
  color: #94a3b8;
}

html[data-theme="dark"] .questions-subject-page .subject-breadcrumb a{
  color: #93c5fd;
}

html[data-theme="dark"] .questions-subject-page .subject-breadcrumb a:hover{
  color: #bfdbfe;
}

.questions-subject-page .chapter-card .card-head{
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .75rem;
}

.questions-subject-page .chapter-card .chapter-head-main{
  display: flex;
  align-items: center;
  gap: .75rem;
  flex: 1 1 auto;
  justify-content: space-between;
}

.questions-subject-page .chapter-card .card-head .toggle-topics{
  cursor: pointer;
}

.questions-subject-page .chapter-card .chapter-open-btn{
  flex: 0 0 auto;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 999px;
  border: 1px solid var(--bs-border-color, #d0d7e2);
  background: var(--bs-surface, #ffffff);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  color: inherit;
  transition:
    background-color .15s ease,
    box-shadow .15s ease,
    transform .1s ease;
}

.questions-subject-page .chapter-card .chapter-open-btn .icon{
  width: 1.25rem;
  height: 1.25rem;
}

.questions-subject-page .chapter-card .chapter-open-btn:hover{
  background: var(--bs-hover-bg, #f1f5f9);
  box-shadow: var(--shadow-sm, 0 1px 3px rgba(15,23,42,.12));
  transform: translateY(-1px);
}

.questions-subject-page .chapter-card .chapter-open-btn:active{
  transform: translateY(0);
  box-shadow: none;
}

.questions-subject-page .topics-list{
  list-style: none;
  padding: 0;
  margin: 0;
  grid-template-columns: 1fr;
  gap: 0;
}

.questions-subject-page .topics-list .topic-row{
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: .75rem;
  padding: .35rem 0;
}

.questions-subject-page .topics-list .topic-count{
  color: var(--bs-muted, #64748b);
  font-size: .85rem;
  white-space: nowrap;
}

.questions-subject-page .subject-footer-actions{
  padding: 1.5rem 0 2.5rem;
  margin-top: 1.25rem;
  display: flex;
  justify-content: center;
}

.questions-subject-page .subject-footer-actions .btn{
  display: inline-flex;
  align-items: center;
  gap: .4rem;
}

.questions-index .question-hero {
  background:
    radial-gradient(900px 460px at 100% -10%, color-mix(in oklab, #14b8a6 16%, transparent), transparent 62%);
}

.questions-index .question-use-cases .chooser-card:nth-child(4) {
  background:
    linear-gradient(135deg, color-mix(in oklab, var(--bs-surface) 92%, #e0e7ff), var(--bs-surface));
}

.questions-index .question-guides {
  border-top: 1px solid var(--bs-border-color);
  border-bottom: 1px solid var(--bs-border-color);
  background: color-mix(in oklab, var(--bs-surface-2) 42%, transparent);
}

.questions-index .question-answer-method,
.questions-index .question-faq {
  padding: 2rem 0;
}

.questions-index .method-grid,
.questions-index .faq-list {
  display: grid;
  gap: 1rem;
}

.questions-index .method-grid article,
.questions-index .faq-list article {
  padding: 1rem;
  border: 1px solid var(--bs-border-color);
  border-radius: .5rem;
  background: var(--bs-surface);
  box-shadow: var(--shadow-sm);
}

.questions-index .method-grid h3,
.questions-index .method-grid p,
.questions-index .faq-list h3,
.questions-index .faq-list p {
  margin: 0;
}

.questions-index .method-grid h3,
.questions-index .faq-list h3 {
  color: var(--bs-heading);
  font-size: 1.05rem;
  line-height: 1.25;
}

.questions-index .method-grid p,
.questions-index .faq-list p {
  margin-top: .45rem;
  color: var(--bs-body-color);
}

@media (min-width: 780px) {
  .questions-index .method-grid {
    grid-template-columns: repeat(1, minmax(0, 1fr));
  }

  .questions-index .faq-list {
    grid-template-columns: repeat(1, minmax(0, 1fr));
  }
}