/*
 * components/tabs.css — Tab + accordion components (Session 5: UI Lab).
 *
 * Paired with templates/components/tabs.html and
 * static/js/components/tabs.js (tab switching only; accordion uses native
 * <details>). Token-driven (D5).
 */

.tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  border-bottom: var(--border-1);
  margin-bottom: var(--space-4);
}

.tabs__tab {
  appearance: none;
  border: none;
  background: transparent;
  color: var(--color-fg-muted);
  font: inherit;
  font-size: var(--fs-md);
  font-weight: var(--fw-semibold);
  padding: var(--space-3) var(--space-4);
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  cursor: pointer;
  transition: color var(--dur-fast) var(--ease-standard),
    border-color var(--dur-fast) var(--ease-standard);
}

.tabs__tab:hover { color: var(--color-fg); }

.tabs__tab[aria-selected="true"] {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

.tabs__tab:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.tabs__panel[hidden] { display: none; }

/* Accordion (native <details>) */
.accordion__item {
  border: var(--border-1);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  margin-bottom: var(--space-2);
  overflow: hidden;
}

.accordion__item + .accordion__item { margin-top: calc(var(--space-2) * -1); border-top: var(--border-1); }

.accordion__summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  font-size: var(--fs-md);
  font-weight: var(--fw-semibold);
  color: var(--color-fg);
}

.accordion__summary::-webkit-details-marker { display: none; }

.accordion__summary::before {
  content: "\25B8";
  transition: transform var(--dur-fast) var(--ease-standard);
  color: var(--color-fg-muted);
}

.accordion__item[open] > .accordion__summary::before {
  transform: rotate(90deg);
}

.accordion__summary:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: -2px;
}

.accordion__body {
  padding: 0 var(--space-4) var(--space-4);
  font-size: var(--fs-md);
}

@media (prefers-reduced-motion: reduce) {
  .tabs__tab, .accordion__summary::before { transition: none; }
}