.section--qa__header {
  display: grid;
  justify-items: center;
  gap: 6px;
  text-align: center;
}

.qa-grid {
  display: grid;
  gap: 18px;
  margin-top: 32px;
  align-items: start;
}

.qa-card {
  padding: 0;
  border: 1px solid rgba(var(--color-gold-matte-rgba), 0.22);
  border-radius: 4px;
  background: var(--color-brown-card);
  overflow: hidden;
  transition: border-color var(--duration-quick) var(--ease-standard);
}

.qa-card:hover {
  border-color: rgba(var(--color-gold-matte-rgba), 0.45);
}

.qa-card:focus-within {
  outline: 2px solid rgba(var(--color-gold-matte-rgba), 0.85);
  outline-offset: 4px;
}

/* SP: details/summary でアコーディオン化 */
.qa-card__question,
.qa-card__answer {
  display: grid;
  grid-template-columns: 24px minmax(0, 1fr);
  column-gap: 14px;
  padding: 0;
  margin: 0;
}

.qa-card__question {
  padding: 22px 50px 22px 20px;
  color: rgba(var(--color-white-warm), 0.95);
  font-size: 17px;
  font-weight: 400;
  line-height: 1.7;
  letter-spacing: 0.05em;
  cursor: pointer;
  position: relative;
  list-style: none;
  user-select: none;
}

.qa-card__question:focus-visible {
  outline: none;
}

.qa-card__question::-webkit-details-marker {
  display: none;
}

.qa-card__question::after {
  content: '';
  position: absolute;
  right: 22px;
  top: 50%;
  width: 12px;
  height: 12px;
  border-right: 2px solid rgba(var(--color-gold-matte-rgba), 0.85);
  border-bottom: 2px solid rgba(var(--color-gold-matte-rgba), 0.85);
  transform: translateY(-75%) rotate(45deg);
  transition: transform var(--duration-quick) var(--ease-standard);
}

.qa-card[open] .qa-card__question::after {
  transform: translateY(-25%) rotate(-135deg);
}

.qa-card__question span {
  color: rgba(var(--color-gold-matte-rgba), 0.95);
  font-size: 22px;
  line-height: 1.35;
}

.qa-card__answer {
  margin-top: 0;
  padding: 0 20px 22px 20px;
  color: rgba(var(--color-white-warm), 0.88);
  font-size: 15px;
  line-height: 2.0;
}

.qa-card__answer span {
  color: rgba(var(--color-white-warm), 0.95);
  font-size: 21px;
  line-height: 1.35;
}

@media (min-width: 768px) {
  .qa-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px;
    margin-top: 40px;
    align-items: start;
  }

  .qa-card__question {
    padding: 28px 50px 28px 26px;
    font-size: 18px;
  }

  .qa-card__answer {
    padding: 0 26px 28px;
    font-size: 16px;
  }
}

.qa-card[open] {
  background: var(--color-brown-card);
}