/* =============================================
   KiRABiSEi - product.css
   商品個別ページ用スタイル
   ============================================= */

/* =============================================
   01: 商品ページヘッダー
   ============================================= */
.product-header {
  padding-top: 140px;
  padding-bottom: 0;
  background: #fff;
}

/* パンくずリスト */
.breadcrumb {
  font-size: 12px;
  color: var(--color-gray-mid);
  margin-bottom: 48px;
}
.breadcrumb a {
  color: var(--color-gray-mid);
  text-decoration: none;
  transition: color var(--transition);
}
.breadcrumb a:hover { color: var(--color-dark); }
.breadcrumb__sep { margin: 0 8px; }

/* 商品名 */
.product-header__name {
  font-size: clamp(22px, 2.5vw, 32px);
  font-weight: 700;
  text-align: center;
  color: var(--color-dark);
  margin-bottom: 16px;
}

/* 型番タグ */
.product-header__tags {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 40px;
}
.product-header__tag {
  display: inline-block;
  border: 1px solid var(--color-dark);
  font-size: 13px;
  font-weight: 500;
  padding: 4px 16px;
  color: var(--color-dark);
  border-radius: 2px;
}

/* ページ内ナビ：container幅で4等分・ヘッダー下に固定 */
.product-nav-wrap {
  position: sticky;
  top: 0;
  z-index: 100;
  background: #fff;
}

/* .product-nav-wrap.is-scrolled {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
} */

.product-nav-wrap__inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 40px;
}
.product-nav {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  border-bottom: 1px solid #d0d4d8;
}
.product-nav__item {
  position: relative;
  padding: 16px 0;
  font-size: 13px;
  font-weight: 500;
  color: var(--color-gray-mid);
  cursor: pointer;
  text-decoration: none;
  transition: color var(--transition);
  white-space: nowrap;
  text-align: center;
}
.product-nav__item::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--color-dark);
  transform: scaleX(0);
  transition: transform var(--transition);
}
.product-nav__item:hover { color: var(--color-dark); }
.product-nav__item.is-active {
  color: var(--color-dark);
  font-weight: 700;
}
.product-nav__item.is-active::after {
  transform: scaleX(1);
}

/* =============================================
   02+03: MV + USP（特長セクション）
   ============================================= */
.product-features {
  padding: 80px 0 0;
  background: #fff;
}

/* MV：テキスト左・画像右 */
.product-mv {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}
.product-mv__text {}
.product-mv__lead {
  font-size: 18px;
  font-weight: 500;
  line-height: 2.0;
  color: var(--color-dark);
}

/* 画像エリア：1枚 */
.product-mv__imgs--single {
  display: flex;
  justify-content: center;
  align-items: flex-end;
}
.product-mv__imgs--single img {
  max-height: 480px;
  width: auto;
  object-fit: contain;
}

/* 画像エリア：2枚 */
.product-mv__imgs--double {
  display: flex;
  gap: 32px;
  justify-content: center;
  align-items: flex-end;
}
.product-mv__img-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}
.product-mv__img-item img {
  max-height: 380px;
  width: auto;
  object-fit: contain;
}
.product-mv__img-caption {
  font-family: 'Outfit', sans-serif;
  font-size: 13px;
  color: var(--color-gray-mid);
  letter-spacing: 0.05em;
}

/* USP：3列カード */
.product-usp {
  padding: 64px 0;
}

.product-usp__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.product-usp__card {
  padding: 48px 40px;
  border: 1px solid var(--color-dark);
  text-align: left;
}

.product-usp__icon {
  font-size: 50px;
  color: var(--color-dark);
  margin-bottom: 24px;
  display: block;
  text-align: center;
}
.product-usp__title {
  font-size: 17px;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: 16px;
  text-align: center;
}
.product-usp__text {
  font-size: 14px;
  line-height: 1.9;
  color: var(--color-dark);
}

/* USP下のCTAボタン */
.product-cta {
  padding: 48px 0 72px;
  background: #fff;
  text-align: center;
}
.product-cta__btn {
  display: inline-flex;
  align-items: center;
  gap: 16px;
  background: var(--color-dark);
  color: #fff;
  padding: 20px 80px;
  font-size: 14px;
  font-weight: 500;
  transition: opacity var(--transition);
  border-radius: var(--radius);
}
.product-cta__btn:hover { opacity: 0.8; }

/* =============================================
   04: 技術仕様・スペック
   ============================================= */
.product-spec {
  padding: 80px 0;
  background: var(--color-gray-bg);
}
.product-spec .sec-title { margin-bottom: 8px; }
.product-spec .sec-divider { margin-bottom: 40px; }

.spec-table {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
  border: 1px solid #d0d4d8;
}
.spec-table tr {
  border-bottom: 1px solid #d0d4d8;
}
.spec-table tr:last-child { border-bottom: none; }
.spec-table__label {
  width: 30%;
  background: #e8eaee;
  padding: 20px 32px;
  font-size: 14px;
  font-weight: 700;
  color: var(--color-dark);
  vertical-align: middle;
  border-right: 1px solid #d0d4d8;
}
.spec-table__value {
  padding: 20px 32px;
  font-size: 14px;
  color: var(--color-dark);
  vertical-align: middle;
  text-align: center;
}

/* ===== 2列テーブル：ラベル幅を従来通り広く ===== */
.spec-table:not(.spec-table--multi) .spec-table__label {
  width: 50%;
  text-align: left;
}
.spec-table:not(.spec-table--multi) .spec-table__value {
  text-align: left;
}

/* ===== 3列テーブル（モデル比較） ===== */
.spec-table--multi .spec-table__label {
  width: 30%;
}

/* モデル名ヘッダー行 */
.spec-table--multi .spec-table__head {
  background: var(--color-dark);
  color: #fff;
  padding: 20px 32px;
  font-size: 14px;
  font-weight: 700;
  text-align: center;
  vertical-align: middle;
  letter-spacing: 0.05em;
}

/* ラベル列のヘッダー（左上の空白セル） */
.spec-table--multi .spec-table__head--empty {
  background: var(--color-dark);
  border-right: 1px solid rgba(255,255,255,0.2);
}

/* モデル列の境界線 */
.spec-table--multi .spec-table__value + .spec-table__value {
  border-left: 1px solid #d0d4d8;
}

/* colspan="2" で結合された値セル */
.spec-table--multi .spec-table__value[colspan] {
  text-align: center;
}

/* =============================================
   05a: リサイクルシステム
   ============================================= */
.product-recycle {
  padding: 80px 0;
  background: #e8eaee;
}
.product-recycle .sec-title { margin-bottom: 8px; }
.product-recycle .sec-divider { margin-bottom: 40px; }
.product-recycle__lead {
  font-size: 15px;
  line-height: 2.0;
  color: var(--color-dark);
  margin-bottom: 48px;
}
.product-recycle__img {
  width: 100%;
  max-width: 900px;
  margin: 0 auto;
  display: block;
}

/* =============================================
   05b: 保守・メンテナンス
   ============================================= */
.product-maintenance {
  position: relative;
  padding: 80px 0;
  overflow: hidden;
  min-height: 480px;
  display: flex;
  align-items: center;
}
.product-maintenance__bg {
  position: absolute;
  inset: 0;
  background-image: url('../images/products/bg-maintenance.jpg');
  background-size: cover;
  background-position: center;
  opacity: 0.3;
  z-index: 1;
}
.product-maintenance::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(40, 41, 48, 1); 
  z-index: 0;
}

.product-maintenance .container {
  position: relative;
  z-index: 1;
}
.product-maintenance .sec-title { color: #fff; }
.product-maintenance .sec-divider { border-color: rgba(255,255,255,0.3); margin-bottom: 24px; }
.product-maintenance__lead {
  text-align: center;
  font-size: 15px;
  color: rgba(255,255,255,0.9);
  margin-bottom: 56px;
  line-height: 1.8;
}
.product-maintenance__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 32px;
}
.product-maintenance__card {
  background: rgba(40, 41, 48, 0.8);
  border-radius: 50%;
  aspect-ratio: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  text-align: center;
  padding: 56px 40px 40px;
  max-width: 260px;
  margin: 0 auto;
}
.product-maintenance__card-title {
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
  line-height: 1.5;
}
.product-maintenance__card-text {
  font-size: 13px;
  color: rgba(255,255,255,0.8);
  line-height: 1.8;
}
.product-maintenance__note {
  text-align: center;
  font-size: 12px;
  color: rgba(255,255,255,0.6);
}

/* =============================================
   06: よくある質問
   ============================================= */
.product-faq {
  padding: 80px 0;
  background: #fff;
}
.product-faq .sec-title { margin-bottom: 8px; }
.product-faq .sec-divider { margin-bottom: 48px; }

/* アコーディオン間マージン */
.product-faq .accordion__item + .accordion__item {
  border-top: none;
  margin-top: 16px;
  border-radius: var(--radius) !important;
  border: 1px solid #d0d4d8;
}
.product-faq .accordion__item:first-child {
  border-radius: var(--radius) !important;
}

.product-faq__cta {
  text-align: center;
  margin-top: 48px;
}

/* =============================================
   07: 他商品リンク
   ============================================= */
.product-related {
  padding: 72px 0;
  background: var(--color-gray-bg);
}
.product-related__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  align-items: start; /* カード同士の高さを独立させる */
}
.product-related__card {
  background: #fff;
  padding: 40px;
  display: grid;
  grid-template-areas:
    "name img"
    "body img";
  gap: 0 18px;
}
.product-related__name {
  grid-area: name;
  grid-column: 1 / 2;
  grid-row: 1 / 2;
  font-size: 18px;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: 16px;
  align-self: start;
}
.product-related__img {
  grid-area: img;
  grid-column: 2 / 3;
  grid-row: 1 / 4;
  width: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
  align-self: center;
}
.product-related__text {
  grid-column: 1 / 2;
  grid-row: 2 / 3;
  font-size: 14px;
  line-height: 1.8;
  color: var(--color-dark);
  margin-bottom: 32px;
  flex: 1; 
}
.product-related__btn {
  grid-column: 1 / 2;
  grid-row: 3 / 4;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--color-dark);
  padding: 10px 28px;
  font-size: 13px;
  color: var(--color-dark);
  transition: all var(--transition);
  border-radius: var(--radius);
  align-self: flex-start; 
  justify-self: start;
}
.product-related__btn:hover {
  background: var(--color-dark);
  color: #fff;
}

.product-related__img img {
  width: 100%;
  height: auto;
  object-fit: contain;
  max-height: 180px;
}