/**
 * A5.4 — Accordion (plain CSS, --canvas-* tokens).
 * Disclosure triggers + regions; clear / card / sunk variants.
 */

.canvas-accordion {
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  min-width: 0;
  border-radius: var(--canvas-radius-2xl);
  border: 1px solid var(--canvas-border-default);
  padding: calc(var(--canvas-space-m) + 2px);
  padding-bottom: 0;
  font-family: var(--canvas-font-body);
  color: var(--canvas-text-primary);
}

.canvas-accordion[data-openui-partial="1"],
.canvas-accordion[aria-disabled="true"] {
  pointer-events: none;
  opacity: 0.72;
}

.canvas-accordion--clear {
  border-color: transparent;
  box-shadow: none;
  padding: 0;
}

.canvas-accordion--card {
  background: var(--canvas-surface-foreground);
  box-shadow: var(--canvas-shadow-s);
}

.canvas-accordion--sunk {
  background: var(--canvas-surface-sunk);
}

.canvas-accordion__item {
  box-sizing: border-box;
  overflow: hidden;
  border-bottom: 1px solid var(--canvas-border-default);
}

.canvas-accordion__item:last-child {
  border-bottom: none;
}

.canvas-accordion__item:focus-within {
  position: relative;
  z-index: 1;
}

.canvas-accordion__header {
  display: flex;
  margin: 0;
  font-size: inherit;
  font-weight: inherit;
}

.canvas-accordion__trigger {
  appearance: none;
  box-sizing: border-box;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--canvas-space-m);
  width: 100%;
  margin: 0;
  border: none;
  background: transparent;
  color: inherit;
  font-family: var(--canvas-font-body);
  font-size: var(--canvas-font-size-md);
  font-weight: var(--canvas-font-weight-medium);
  line-height: var(--canvas-line-height-body);
  text-align: left;
  padding: var(--canvas-space-l) 0;
  min-height: var(--canvas-touch-target-min);
  cursor: pointer;
}

.canvas-accordion--clear .canvas-accordion__item:first-child .canvas-accordion__trigger {
  padding-top: 0;
}

.canvas-accordion__trigger:focus-visible {
  outline: 2px solid var(--canvas-border-interactive-selected);
  outline-offset: 2px;
}

.canvas-accordion__trigger-label {
  flex: 1 1 auto;
  min-width: 0;
}

.canvas-accordion__chevron {
  flex: 0 0 auto;
  color: var(--canvas-text-secondary);
  transition: transform var(--canvas-motion-duration-default) var(--canvas-motion-ease-standard);
}

.canvas-accordion__trigger[data-state="open"] .canvas-accordion__chevron,
.canvas-accordion__item[data-state="open"] .canvas-accordion__chevron {
  transform: rotate(180deg);
}

.canvas-accordion__panel {
  box-sizing: border-box;
}

.canvas-accordion__panel[hidden] {
  display: none;
}

.canvas-accordion__panel-inner {
  display: flex;
  flex-direction: column;
  gap: var(--canvas-space-m);
  padding: 0 0 var(--canvas-space-l);
}

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