/* =============================================
   Accordion / Collapsible Component — UI-0084
   ============================================= */

/* --- Accordion Container --- */
.accordion {
  width: 100%;
  font-family: var(--font-sans);
}

/* --- Accordion Item --- */
.accordion__item {
  border-bottom: 1px solid var(--border-default, #E2E8F0);
}

.accordion__item:first-child {
  border-top: 1px solid var(--border-default, #E2E8F0);
}

/* --- Accordion Trigger Button --- */
.accordion__trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  width: 100%;
  padding: var(--space-5) 0; /* 20px vertical */
  background: none;
  border: none;
  cursor: pointer;
  text-align: left;
  color: var(--text-primary, #111111);
  font-family: inherit;
  font-size: var(--text-base);
  font-weight: var(--font-medium);
  line-height: var(--leading-snug, 1.375);
  transition: color var(--duration-fast) var(--ease-default);
}

.accordion__trigger:hover {
  color: var(--color-electric, #2F80ED);
}

/* Focus visible */
.accordion__trigger:focus-visible {
  outline: 2px solid var(--color-electric, #2F80ED);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* --- Chevron Icon --- */
.accordion__chevron {
  flex-shrink: 0;
  width: var(--icon-md);
  height: var(--icon-md);
  color: var(--text-muted, #B0BAC5);
  stroke: currentColor;
  fill: none;
  transition: transform var(--duration-normal) var(--ease-default),
              color var(--duration-fast) var(--ease-default);
}

/* Rotate chevron when open */
.accordion__item.is-open .accordion__chevron,
.accordion__trigger[aria-expanded="true"] .accordion__chevron {
  transform: rotate(180deg);
  color: var(--color-electric, #2F80ED);
}

/* --- Accordion Content Panel --- */
.accordion__panel {
  overflow: hidden;
  max-height: 0;
  transition: max-height var(--duration-normal) var(--ease-default);
}

.accordion__panel.is-open {
  /* max-height set by JS via scrollHeight */
  max-height: none; /* fallback */
}

/* --- Accordion Panel Inner --- */
.accordion__content {
  padding-bottom: var(--space-5);
  font-size: var(--text-base);
  color: var(--text-secondary, #4A5568);
  line-height: var(--leading-normal, 1.5);
}

.accordion__content p + p {
  margin-top: var(--space-4);
}

/* --- Bordered Card Variant --- */
.accordion--card .accordion__item {
  border: 1px solid var(--border-default, #E2E8F0);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-2);
}

.accordion--card .accordion__item:first-child {
  border-top: 1px solid var(--border-default, #E2E8F0);
}

.accordion--card .accordion__trigger {
  padding: var(--space-4) var(--space-5);
}

.accordion--card .accordion__content {
  padding: 0 var(--space-5) var(--space-4);
}

.accordion--card .accordion__item.is-open {
  border-color: var(--color-electric, #2F80ED);
}

/* --- FAQ Variant (larger heading) --- */
.accordion--faq .accordion__trigger {
  font-size: var(--text-lg);
  padding: var(--space-6) 0;
}

/* =============================================
   Accordion — Mobile Responsive
   ============================================= */
@media (max-width: 639px) {
  .accordion__trigger {
    padding: var(--space-4) 0;
    min-height: 44px;
    font-size: var(--text-sm);
  }

  .accordion--faq .accordion__trigger {
    font-size: var(--text-base);
    padding: var(--space-4) 0;
  }

  .accordion--card .accordion__trigger {
    padding: var(--space-3) var(--space-4);
  }

  .accordion--card .accordion__content {
    padding: 0 var(--space-4) var(--space-3);
  }
}