/* ========================================
   商品詳細ページ - item.css
   rem基準（1rem = 10px @1920px）
   ======================================== */

/* ========================================
   パンくずリスト
   ======================================== */
.item-breadcrumb {
    background-color: var(--cream-bg);
    padding: 2.8rem 0 0;
}

.item-breadcrumb-inner {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 11.2rem;
}

.item-breadcrumb-list {
    display: flex;
    align-items: center;
    gap: 1.4rem;
    font-size: 2rem;
    color: var(--text-light);
}

.item-breadcrumb-list a {
    color: var(--accent-blue);
    font-weight: 500;
}

.item-breadcrumb-list a:hover {
    text-decoration: underline;
}

.item-breadcrumb-separator {
    color: var(--text-light);
    font-size: 1.8rem;
}

.item-breadcrumb-current {
    color: var(--text-color);
    font-weight: 600;
}

/* ========================================
   商品詳細セクション
   ======================================== */
.item-detail-section {
    padding: 10rem 0;
    background-color: var(--cream-bg);
}

.item-detail-inner {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 11.2rem;
}

.item-detail-flex {
    display: flex;
    gap: 7rem;
    align-items: flex-start;
}

/* ========================================
   左: 画像エリア
   ======================================== */
.item-images {
    flex: 0 0 48%;
}

.item-main-image {
    background-color: #fff;
    border-radius: 2.1rem;
    overflow: hidden;
    aspect-ratio: 1 / 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

.item-main-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 2.1rem;
    transition: opacity 0.3s ease;
}

.item-thumbs {
    display: flex;
    gap: 2.1rem;
    margin-top: 2.8rem;
}

.item-thumb {
    flex: 1;
    aspect-ratio: 1 / 1;
    border: 2px solid transparent;
    border-radius: 1.4rem;
    overflow: hidden;
    cursor: pointer;
    background: #fff;
    padding: 0;
    transition: border-color 0.2s ease, opacity 0.2s ease;
}

.item-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    border-radius: 1.2rem;
}

.item-thumb:hover {
    border-color: var(--primary-color);
}

.item-thumb.active {
    border-color: var(--primary-color);
    opacity: 0.7;
}

/* ========================================
   右: 商品情報エリア
   ======================================== */
.item-info {
    flex: 1;
}

/* タグ（トップページの .pickup-tag を再利用） */
.item-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.84rem;
    margin-bottom: 2.8rem;
}

/* PSAバッジ */
.item-psa-badge {
    display: inline-block;
    background-color: var(--accent-blue);
    color: #fff;
    font-size: 2.24rem;
    font-weight: 700;
    padding: 0.84rem 2.1rem;
    border-radius: 0.7rem;
    margin-bottom: 2.8rem;
    letter-spacing: 0.05em;
}

/* 商品名 */
.item-name {
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--text-color);
    line-height: 1.5;
    margin-bottom: 2.8rem;
}

/* 価格 */
.item-price {
    font-size: 4.2rem;
    font-weight: 700;
    color: var(--text-color);
    margin-bottom: 2.8rem;
    line-height: 1.2;
}

.item-price-tax {
    font-size: 2.52rem;
    font-weight: 600;
    margin-left: 0.42rem;
}

/* 在庫 */
.item-stock {
    display: flex;
    align-items: center;
    gap: 1.4rem;
    margin-bottom: 4.2rem;
    padding-bottom: 4.2rem;
    border-bottom: 1px solid var(--border-color);
}

.item-stock-label {
    font-size: 2.38rem;
    font-weight: 600;
    color: var(--text-color);
}

.item-stock-value {
    font-size: 2.38rem;
    font-weight: 700;
}

.item-stock-available {
    color: #28a745;
}

.item-stock-unavailable {
    color: var(--danger-color);
}

/* ========================================
   数量コントロール
   ======================================== */
.item-qty-area {
    margin-bottom: 4.2rem;
}

.item-qty-label {
    display: block;
    font-size: 2.38rem;
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: 1.4rem;
}

.item-qty-control {
    display: flex;
    align-items: center;
    gap: 0;
    width: fit-content;
}

.item-qty-minus,
.item-qty-plus {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 6.3rem;
    height: 6.3rem;
    border: 1px solid var(--border-color);
    background-color: var(--cream-bg);
    font-size: 2.8rem;
    font-weight: 600;
    color: var(--text-color);
    cursor: pointer;
    transition: background-color 0.2s ease;
    user-select: none;
}

.item-qty-minus {
    border-radius: 0.7rem 0 0 0.7rem;
}

.item-qty-plus {
    border-radius: 0 0.7rem 0.7rem 0;
}

.item-qty-minus:hover,
.item-qty-plus:hover {
    background-color: var(--border-color);
}

.item-qty-input {
    width: 8.4rem;
    height: 6.3rem;
    text-align: center;
    font-size: 2.52rem;
    font-weight: 600;
    border: 1px solid var(--border-color);
    border-left: none;
    border-right: none;
    background-color: #fff;
    color: var(--text-color);
    -moz-appearance: textfield;
    appearance: textfield;
}

.item-qty-input::-webkit-outer-spin-button,
.item-qty-input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

/* ========================================
   カートボタン
   ======================================== */
.item-cart-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1.4rem;
    width: 100%;
    padding: 2.8rem;
    background-color: var(--accent-blue);
    color: #fff;
    font-size: 2.8rem;
    font-weight: 700;
    border: none;
    border-radius: 1.05rem;
    cursor: pointer;
    transition: background-color 0.2s ease;
    margin-bottom: 5.6rem;
    letter-spacing: 0.1em;
}

.item-cart-btn svg {
    width: 3.5rem;
    height: 3.5rem;
    stroke: #fff;
}

.item-cart-btn:hover {
    background-color: var(--accent-blue-dark);
}

.item-cart-btn:disabled {
    opacity: 0.7;
    cursor: default;
}

/* ========================================
   商品説明
   ======================================== */
.item-description {
    padding-top: 4.2rem;
    border-top: 1px solid var(--border-color);
}

.item-description-title {
    font-size: 2.8rem;
    font-weight: 700;
    color: var(--text-color);
    margin-bottom: 2.8rem;
}

.item-description p {
    font-size: 2.38rem;
    color: var(--text-color);
    line-height: 1.8;
    margin-bottom: 2.1rem;
}

/* ========================================
   関連商品セクション
   ======================================== */
.item-related-section {
    padding: 10rem 0;
    background-color: var(--bg-white);
}

.item-related-inner {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 11.2rem;
}

.item-related-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 4.9rem;
    padding-top: 2.8rem;
    max-width: 80%;
    margin: 0 auto;
}

/* ========================================
   レスポンシブ - タブレット（768px以下）
   ======================================== */
@media (max-width: 768px) {
    .item-breadcrumb-inner {
        padding: 0 4.2rem;
    }

    .item-detail-section {
        padding: 8rem 0;
    }

    .item-detail-inner {
        padding: 0 2.8rem;
    }

    .item-detail-flex {
        flex-direction: column;
        gap: 5.6rem;
    }

    .item-images {
        flex: none;
        width: 100%;
    }

    .item-name {
        font-size: 3rem;
    }

    .item-price {
        font-size: 3.5rem;
    }

    .item-related-section {
        padding: 8rem 0;
    }

    .item-related-inner {
        padding: 0 2.8rem;
    }

    .item-related-grid {
        max-width: 100%;
        gap: 3.5rem;
    }

}

/* ========================================
   レスポンシブ - 小画面モバイル（480px以下）
   ======================================== */
@media (max-width: 480px) {
    .item-breadcrumb {
        padding: 2.1rem 0 0;
    }

    .item-breadcrumb-inner {
        padding: 0 2.8rem;
    }

    .item-breadcrumb-list {
        font-size: 1.82rem;
    }

    .item-detail-section {
        padding: 6rem 0;
    }

    .item-detail-inner {
        padding: 0 2.1rem;
    }

    .item-detail-flex {
        gap: 4.2rem;
    }

    .item-thumbs {
        gap: 1.4rem;
    }

    .item-name {
        font-size: 2.66rem;
    }

    .item-price {
        font-size: 3rem;
    }

    .item-price-tax {
        font-size: 2.24rem;
    }

    .item-psa-badge {
        font-size: 1.96rem;
        padding: 0.7rem 1.68rem;
    }

    .item-cart-btn {
        font-size: 2.52rem;
        padding: 2.4rem;
    }

    .item-cart-btn svg {
        width: 3rem;
        height: 3rem;
    }

    .item-description-title {
        font-size: 2.52rem;
    }

    .item-description p {
        font-size: 2.1rem;
    }

    .item-related-section {
        padding: 6rem 0;
    }

    .item-related-inner {
        padding: 0 2.1rem;
    }

    .item-related-grid {
        grid-template-columns: 1fr;
        gap: 4.2rem;
    }

}