/* ==========================================
   Item Detail Section
========================================== */
.item-detail-section {
    padding: 120px 0 var(--spacing-xxl);
}

/* Breadcrumb */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-lg);
    font-size: 0.875rem;
    color: var(--color-text-light);
}

.breadcrumb a {
    color: var(--color-text-light);
}

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

.breadcrumb span:last-child {
    color: var(--color-text);
}

/* Item Detail Content */
.item-detail-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xxl);
}

/* ==========================================
   Image Gallery
========================================== */
.item-gallery {
    width: 100%;
}

.gallery-main {
    position: relative;
    margin-bottom: var(--spacing-md);
    width: 100%;
    aspect-ratio: 3/4;
    background: var(--color-bg-light);
    overflow: hidden;
}

.gallery-main img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: opacity 0.3s ease;
}

/* Gallery Thumbnails */
.gallery-thumbs {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-sm);
}

.thumb-item {
    aspect-ratio: 1;
    cursor: pointer;
    opacity: 0.6;
    transition: opacity 0.3s ease;
    border: 2px solid transparent;
    overflow: hidden;
    position: relative;
}

.thumb-item:hover,
.thumb-item.active {
    opacity: 1;
    border-color: var(--color-primary);
}

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

/* ==========================================
   Item Information
========================================== */
.item-info-section {
    width: 100%;
}

.item-detail-title {
    font-size: 1.75rem;
    font-weight: 500;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-md);
}

.item-price {
    display: flex;
    align-items: baseline;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--color-border);
}

.price-label {
    font-size: 0.875rem;
    color: var(--color-text-light);
    letter-spacing: 0.1em;
}

.price-value {
    font-size: 1.5rem;
    font-weight: 500;
    color: var(--color-primary);
}

.item-description {
    margin-bottom: var(--spacing-xl);
}

.item-description h3 {
    font-size: 1rem;
    font-weight: 500;
    margin-bottom: var(--spacing-sm);
}

.item-description p {
    font-size: 0.9rem;
    line-height: 2;
    color: var(--color-text);
}

.item-details {
    margin-bottom: var(--spacing-xl);
}

.detail-item {
    padding: var(--spacing-md) 0;
    border-bottom: 1px solid var(--color-border);
}

.detail-item h4 {
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text-light);
}

.detail-item p {
    font-size: 0.9rem;
    line-height: 1.8;
}

/* ==========================================
   Item Actions
========================================== */
.item-actions {
    margin-bottom: var(--spacing-xl);
}

.btn-shop {
    display: block;
    width: 100%;
    padding: 16px;
    background: var(--color-primary);
    color: white;
    text-align: center;
    font-size: 1rem;
    font-weight: 500;
    letter-spacing: 0.05em;
    transition: var(--transition);
}

.btn-shop:hover {
    background: var(--color-secondary);
    opacity: 1;
}

.shop-note {
    font-size: 0.75rem;
    color: var(--color-text-light);
    text-align: center;
    margin-top: var(--spacing-xs);
}

/* ==========================================
   Share Buttons
========================================== */
.share-buttons {
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
}

.share-label {
    font-size: 0.875rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-sm);
}

.share-icons {
    display: flex;
    gap: var(--spacing-sm);
}

.share-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    transition: var(--transition);
}

.share-btn.twitter {
    background: #000000;
    color: white;
}

.share-btn.facebook {
    background: #1877F2;
    color: white;
}

.share-btn.line {
    background: #06C755;
    color: white;
}

.share-btn.pinterest {
    background: #E60023;
    color: white;
}

.share-btn:hover {
    transform: translateY(-2px);
    opacity: 0.9;
}

/* ==========================================
   Related Items
========================================== */
.related-items {
    padding-top: var(--spacing-xxl);
    border-top: 1px solid var(--color-border);
}

.related-items .section-title {
    font-size: 2rem;
    margin-bottom: var(--spacing-lg);
}

.related-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
}

.related-item {
    position: relative;
    overflow: hidden;
}

.related-image {
    aspect-ratio: 3/4;
    overflow: hidden;
}

.related-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.related-item:hover .related-image img {
    transform: scale(1.1);
}

.related-title {
    font-size: 0.9rem;
    font-weight: 400;
    text-align: center;
    margin-top: var(--spacing-sm);
    letter-spacing: 0.05em;
}

.related-items .btn-more {
    display: block;
    text-align: center;
    max-width: 400px;
    margin: var(--spacing-xl) auto 0;
}

/* ==========================================
   Responsive Design - Tablet
========================================== */
@media (min-width: 768px) {
    .item-detail-content {
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-xxl);
    }

    .item-detail-title {
        font-size: 2rem;
    }

    .price-value {
        font-size: 1.75rem;
    }

    .related-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--spacing-lg);
    }

    .btn-shop {
        font-size: 1.125rem;
        padding: 18px;
    }
}

/* ==========================================
   Responsive Design - Desktop
========================================== */
@media (min-width: 1024px) {
    .item-detail-title {
        font-size: 2.25rem;
    }

    .related-items .section-title {
        font-size: 2.5rem;
    }
}