/* ============================================================
   faq.css
   「FAQ（よくある質問）」セクション（#faq 配下のみ）
   ============================================================ */

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.faq-item {
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color 0.2s ease;
}

.faq-item[open] {
  border-color: var(--color-line-strong);
}

.faq-item summary {
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.15rem 1.35rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.98rem;
  color: var(--color-text);
  cursor: pointer;
  user-select: none;
  transition: background-color 0.2s ease;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary:hover {
  background: var(--color-surface-2);
}

.faq-item__q {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  flex: 1;
}

.faq-item__q-badge {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--color-matcha);
  flex-shrink: 0;
}

.faq-item__icon {
  width: 18px;
  height: 18px;
  min-width: 18px;
  color: var(--color-text-muted);
  transition: transform 0.25s ease;
}

.faq-item[open] .faq-item__icon {
  transform: rotate(180deg);
  color: var(--color-matcha-light);
}

.faq-item__a {
  padding: 1rem 1.35rem 1.25rem 3.1rem;
  font-size: 0.88rem;
  line-height: 1.8;
  color: var(--color-text-muted);
  border-top: 1px solid var(--color-line);
  background: color-mix(in srgb, var(--color-surface-2) 40%, var(--color-surface));
}

@media (max-width: 600px) {
  .faq-item summary {
    padding: 1rem 1.1rem;
    font-size: 0.92rem;
  }
  .faq-item__a {
    padding: 0.9rem 1.1rem 1.1rem 1.1rem;
    font-size: 0.85rem;
  }
}