/*
  accordion.css
  FAQ用アコーディオン。開閉状態は aria-expanded / hidden 属性で制御する。
*/

.accordion {
  max-width: 37.5rem;
  margin: 4rem auto 0;
  border-top: 1px solid var(--color-border);
}

.accordion__item {
  border-bottom: 1px solid var(--color-border);
}

.accordion__trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.875rem;
  width: 100%;
  padding-block: 1.25rem;
  text-align: left;
}

.accordion__q {
  flex: none;
  width: 0.8125rem;
  font-family: var(--font-accent);
  font-style: italic;
  font-size: 1rem;
  line-height: 1.5;
  color: var(--color-accent-light);
}

.accordion__question {
  flex: 1;
  font-family: var(--font-heading);
  font-size: 1rem;
  line-height: 1.4;
  color: var(--color-text);
}

.accordion__icon {
  flex: none;
  width: 0.875rem;
  height: 0.875rem;
  transition: transform 0.25s ease;
}

.accordion__trigger[aria-expanded="true"] .accordion__icon {
  transform: rotate(45deg);
}

.accordion__panel {
  padding: 0 2rem 1.5rem 1.7rem;
  animation: accordion-open 0.25s ease;
}

.accordion__text {
  line-height: 1.9;
  color: var(--color-text-muted);
}

@keyframes accordion-open {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }

  to {
    opacity: 1;
    transform: none;
  }
}

@media (min-width: 768px) {
  .accordion__trigger {
    padding-block: 1.5rem;
  }

  .accordion__question {
    font-size: 1.05rem;
  }
}