/* =========================================================
   Faq
========================================================= */

.faq {
  padding-block: 140px;
  background: var(--color-white);
}

.faq__inner {
  display: grid;
  grid-template-columns: 4fr 8fr;
  align-items: start;
  gap: 64px;
}

/* ---------- Head ---------- */
.faq__title {
  margin-top: 28px;
  font-family: var(--font-heading);
  font-size: clamp(32px, 3.1vw, 44px);
  font-weight: 700;
  line-height: 1.55;
  letter-spacing: 0.04em;
}

/* ---------- List ---------- */
.faq__list {
  border-top: 1px solid var(--color-accent);
}

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

.faq__heading {
  font-size: inherit;
  font-weight: inherit;
}

.faq__q {
  display: grid;
  grid-template-columns: 32px 1fr 24px;
  align-items: center;
  gap: 20px;
  width: 100%;
  min-height: 80px;
  padding: 20px 8px;
  text-align: left;
  transition: color var(--duration) var(--ease);
}

.faq__q:hover {
  color: var(--color-primary);
}

.faq__mark {
  font-family: var(--font-heading);
  font-size: 22px;
  font-weight: 700;
  line-height: 1;
  color: var(--color-primary);
}

.faq__q-text {
  font-size: 17px;
  font-weight: 700;
  line-height: 1.6;
  letter-spacing: 0.06em;
}

/* ＋ / − アイコン：縦線を潰して − にする */
.faq__icon {
  position: relative;
  width: 18px;
  height: 18px;
  justify-self: end;
}

.faq__icon::before,
.faq__icon::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 0;
  width: 100%;
  height: 1.5px;
  margin-top: -0.75px;
  border-radius: 2px;
  background: var(--color-primary);
  transition: transform 0.25s var(--ease);
}

.faq__icon::after {
  transform: rotate(90deg);
}

.faq__q[aria-expanded="true"] .faq__icon::after {
  transform: rotate(90deg) scaleX(0);
}

/* ---------- Answer ---------- */
/* 高さ0 ⇔ 自動の開閉を grid-template-rows で滑らかに */
.faq__a {
  display: grid;
  grid-template-rows: 0fr;
  visibility: hidden;
  transition: grid-template-rows 0.25s var(--ease),
              visibility 0s linear 0.25s;
}

.faq__item.is-open .faq__a {
  grid-template-rows: 1fr;
  visibility: visible;
  transition: grid-template-rows 0.25s var(--ease),
              visibility 0s linear 0s;
}

.faq__a-inner {
  overflow: hidden;
}

.faq__a-body {
  display: grid;
  grid-template-columns: 32px 1fr;
  gap: 20px;
  padding: 0 52px 28px 8px;
}

.faq__mark--a {
  padding-top: 4px;
  color: var(--color-accent);
}

.faq__a-body p {
  font-size: 15px;
  line-height: 2;
  letter-spacing: 0.05em;
  color: var(--color-text-sub);
}

/* ---------- Tablet / SP ---------- */
@media (max-width: 960px) {
  .faq {
    padding-block: 100px;
  }

  .faq__inner {
    grid-template-columns: 1fr;
    gap: 44px;
  }
}

@media (max-width: 767px) {
  .faq {
    padding-block: 80px;
  }

  .faq__title {
    margin-top: 20px;
    font-size: clamp(26px, 7.4vw, 32px);
  }

  .faq__q {
    grid-template-columns: 24px 1fr 18px;
    gap: 12px;
    min-height: 72px;
    padding: 18px 0;
  }

  .faq__mark {
    font-size: 19px;
  }

  .faq__q-text {
    font-size: 15px;
    letter-spacing: 0.04em;
  }

  .faq__icon {
    width: 16px;
    height: 16px;
  }

  .faq__a-body {
    grid-template-columns: 24px 1fr;
    gap: 12px;
    padding: 0 0 24px;
  }

  .faq__a-body p {
    font-size: 14px;
    letter-spacing: 0.04em;
  }
}

@media (prefers-reduced-motion: reduce) {
  .faq__a,
  .faq__item.is-open .faq__a { transition: none; }
}