/* Shared UI helpers — filter collapsibles, page intros, nav */
.filter-details {
  margin: .85rem 0;
  border: 1px solid var(--border, #d8dee4);
  border-radius: 10px;
  background: var(--badge-bg, #f1f5f9);
  overflow: hidden;
}
.filter-details > summary {
  padding: .65rem .85rem;
  font-size: .82rem;
  font-weight: 600;
  color: var(--text-secondary, #475569);
  cursor: pointer;
  user-select: none;
  list-style: none;
}
.filter-details > summary::-webkit-details-marker { display: none; }
.filter-details > summary::before {
  content: "▸ ";
  color: var(--text-muted, #64748b);
}
.filter-details[open] > summary::before { content: "▾ "; }
.filter-details > summary:hover { color: var(--accent, #2563eb); }
.filter-details .filter-details-body {
  padding: .85rem .85rem .25rem;
  border-top: 1px solid var(--border, #d8dee4);
}
.page-intro {
  font-size: .88rem;
  color: var(--text-secondary, #475569);
  margin: -.35rem 0 1rem;
  line-height: 1.5;
}
.search-divider {
  display: flex;
  align-items: center;
  gap: .75rem;
  margin: 1rem 0 .75rem;
  font-size: .72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--text-muted, #64748b);
}
.search-divider::before,
.search-divider::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--border, #d8dee4);
}
.nav-sep {
  width: 1px;
  height: 1.25rem;
  background: var(--border, #d8dee4);
  margin: 0 .15rem;
  align-self: center;
  opacity: .7;
}