/*
 * publications-filter.css — chip styling for the topic filter on
 * `related_publications` and `community_publications`.
 *
 * Uses pydata_sphinx_theme / sphinx_book_theme CSS custom properties
 * (`--pst-color-*`) so the chips feel native to the docs theme in both
 * light and dark modes, with sensible fallbacks.
 */

.pub-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 16px 0 28px;
  padding: 0;
}

.pub-filter__chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  font: inherit;
  font-size: 0.85rem;
  line-height: 1.4;
  color: var(--pst-color-text-base, #374151);
  background: transparent;
  border: 1px solid var(--pst-color-border, rgba(0, 0, 0, 0.15));
  border-radius: 999px;
  cursor: pointer;
  transition: background-color 200ms ease, border-color 200ms ease, color 200ms ease;
  white-space: nowrap;
}

.pub-filter__chip:hover:not(:disabled) {
  border-color: var(--pst-color-primary, #0558a5);
  color: var(--pst-color-primary, #0558a5);
}

.pub-filter__chip:focus-visible {
  outline: 2px solid var(--pst-color-primary, #0558a5);
  outline-offset: 2px;
}

.pub-filter__chip.is-active {
  background: var(--pst-color-primary, #0558a5);
  border-color: var(--pst-color-primary, #0558a5);
  color: var(--pst-color-background, #ffffff);
}

.pub-filter__chip.is-empty,
.pub-filter__chip:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.pub-filter__chip--all {
  font-weight: 500;
}

.pub-filter__count {
  font-size: 0.75rem;
  opacity: 0.75;
  font-variant-numeric: tabular-nums;
}

.pub-filter__empty {
  margin: 12px 0 24px;
  font-style: italic;
  color: var(--pst-color-text-muted, #6b7280);
}

@media (prefers-reduced-motion: reduce) {
  .pub-filter__chip {
    transition: none;
  }
}