/* Page Header */
.page-header {
    padding: var(--space-6) 0;
    background: var(--color-background-alt);
}

/* Product Layout */
.product-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8);
    align-items: start;
}

@media (max-width: 768px) {
    .product-layout {
        grid-template-columns: 1fr;
    }
}

/* Gallery */
.main-image {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    aspect-ratio: 1;
}

.main-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.gallery-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255,255,255,0.9);
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

.gallery-nav.prev { left: var(--space-4); }
.gallery-nav.next { right: var(--space-4); }

.thumbnail-list {
    display: flex;
    gap: var(--space-2);
    margin-top: var(--space-4);
}

.thumbnail {
    width: 80px;
    height: 80px;
    border-radius: var(--radius-md);
    overflow: hidden;
    cursor: pointer;
    border: 2px solid transparent;
    transition: border-color var(--transition-fast);
}

.thumbnail.active {
    border-color: var(--color-primary);
}

.thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Product Info */
.product-info-detail {
    padding: var(--space-4) 0;
}

.product-brand-detail {
    color: var(--color-primary);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-2);
}

.product-title-detail {
    font-size: var(--text-3xl);
    font-weight: 600;
    margin-bottom: var(--space-4);
}

.product-rating {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    margin-bottom: var(--space-4);
}

.stars {
    color: var(--color-warning);
}

.rating-count {
    color: var(--color-text-muted);
}

/* Price */
.product-price-detail {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    margin-bottom: var(--space-6);
}

.price-sale {
    font-size: var(--text-2xl);
    font-weight: 700;
    color: var(--color-primary);
}

.price-regular {
    font-size: var(--text-lg);
    color: var(--color-text-muted);
    text-decoration: line-through;
}

.price-discount {
    background: var(--color-danger);
    color: white;
    padding: var(--space-1) var(--space-2);
    border-radius: var(--radius-sm);
    font-size: var(--text-sm);
    font-weight: 600;
}

/* Meta */
.product-meta {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    margin-bottom: var(--space-6);
    padding: var(--space-4);
    background: var(--color-background-alt);
    border-radius: var(--radius-lg);
}

.meta-item {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.meta-item i {
    color: var(--color-success);
    width: 20px;
}

.meta-label {
    font-weight: 500;
}

.meta-value {
    color: var(--color-text-muted);
}

/* Options */
.product-options {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
    margin-bottom: var(--space-6);
}

.option-group label {
    display: block;
    font-weight: 500;
    margin-bottom: var(--space-2);
}

.color-options {
    display: flex;
    gap: var(--space-2);
}

.color-option {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    cursor: pointer;
    border: 3px solid transparent;
    transition: all var(--transition-fast);
}

.color-option:hover {
    transform: scale(1.1);
}

.color-option.selected {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 2px white, 0 0 0 4px var(--color-primary);
}

.size-options {
    display: flex;
    gap: var(--space-2);
    flex-wrap: wrap;
}

.size-option {
    min-width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.size-option:hover {
    border-color: var(--color-primary);
}

.size-option.selected {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

/* Quantity */
.quantity-selector {
    display: flex;
    align-items: center;
    gap: 0;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    width: fit-content;
}

.qty-btn-large {
    width: 48px;
    height: 48px;
    border: none;
    background: transparent;
    cursor: pointer;
    font-size: var(--text-lg);
    transition: background var(--transition-fast);
}

.qty-btn-large:hover:not(:disabled) {
    background: var(--color-background-alt);
}

.qty-btn-large:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.quantity-selector input {
    width: 60px;
    height: 48px;
    border: none;
    text-align: center;
    font-size: var(--text-lg);
    font-weight: 500;
    -moz-appearance: textfield;
}

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

/* Add to Cart */
.add-to-cart-section {
    display: flex;
    gap: var(--space-3);
    margin-bottom: var(--space-6);
}

.btn-add-cart {
    flex: 1;
    height: 56px;
    background: var(--color-primary);
    color: white;
    border: none;
    border-radius: var(--radius-lg);
    font-size: var(--text-lg);
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    transition: all var(--transition-fast);
}

.btn-add-cart:hover:not(:disabled) {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
}

.btn-add-cart:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-wishlist {
    width: 56px;
    height: 56px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    background: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--text-xl);
    color: var(--color-text-muted);
    transition: all var(--transition-fast);
}

.btn-wishlist:hover {
    border-color: var(--color-danger);
    color: var(--color-danger);
}

.btn-wishlist.active {
    background: var(--color-danger);
    border-color: var(--color-danger);
    color: white;
}

.btn-wishlist.active i {
    font-weight: 900;
}

/* Product Actions */
.product-actions-detail {
    display: flex;
    gap: var(--space-4);
    margin-bottom: var(--space-6);
}

.product-actions-detail a {
    color: var(--color-text-muted);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: var(--space-2);
    transition: color var(--transition-fast);
}

.product-actions-detail a:hover {
    color: var(--color-primary);
}

/* Tabs */
.product-tabs {
    margin-top: var(--space-8);
}

.tab-nav {
    display: flex;
    gap: var(--space-6);
    border-bottom: 1px solid var(--color-border);
    margin-bottom: var(--space-6);
}

.tab-btn {
    padding: var(--space-3) 0;
    background: none;
    border: none;
    cursor: pointer;
    font-size: var(--text-base);
    font-weight: 500;
    color: var(--color-text-muted);
    position: relative;
    transition: color var(--transition-fast);
}

.tab-btn:hover {
    color: var(--color-text);
}

.tab-btn.active {
    color: var(--color-primary);
}

.tab-btn.active::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--color-primary);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

.description-content {
    line-height: 1.7;
    color: var(--color-text);
}

.description-content h3 {
    font-size: var(--text-xl);
    margin-bottom: var(--space-4);
}

.description-content ul {
    list-style: disc;
    padding-left: var(--space-6);
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

/* Reviews */
.reviews-summary {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: var(--space-8);
    margin-bottom: var(--space-8);
    padding: var(--space-6);
    background: var(--color-background-alt);
    border-radius: var(--radius-lg);
}

.rating-big {
    text-align: center;
}

.rating-number {
    font-size: var(--text-5xl);
    font-weight: 700;
    line-height: 1;
}

.rating-stars-big {
    color: var(--color-warning);
    margin: var(--space-2) 0;
}

.rating-total {
    color: var(--color-text-muted);
}

.rating-bars {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.rating-bar {
    display: grid;
    grid-template-columns: 50px 1fr 30px;
    align-items: center;
    gap: var(--space-3);
}

.rating-bar-label {
    font-weight: 500;
}

.rating-bar-track {
    height: 8px;
    background: var(--color-border);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.rating-bar-fill {
    height: 100%;
    background: var(--color-warning);
    border-radius: var(--radius-full);
    transition: width var(--transition-slow);
}

.review-item {
    padding: var(--space-6) 0;
    border-bottom: 1px solid var(--color-border);
}

.review-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--space-4);
}

.review-author {
    display: flex;
    gap: var(--space-3);
}

.review-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--color-primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
}

.review-meta h4 {
    font-weight: 600;
}

.review-date {
    color: var(--color-text-muted);
    font-size: var(--text-sm);
}

.review-rating {
    color: var(--color-warning);
}

.review-text {
    color: var(--color-text-muted);
    line-height: 1.7;
}

/* Related Products */
.related-products {
    margin-top: var(--space-12);
    padding-top: var(--space-8);
    border-top: 1px solid var(--color-border);
}

.related-products h2 {
    font-size: var(--text-2xl);
    margin-bottom: var(--space-6);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-6);
}

@media (max-width: 1024px) {
    .products-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .products-grid {
        grid-template-columns: 1fr;
    }
}

.product-card {
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: transform var(--transition-fast);
}

.product-card:hover {
    transform: translateY(-4px);
}

.product-image {
    aspect-ratio: 3/4;
    overflow: hidden;
    border-radius: var(--radius-lg);
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.product-card:hover .product-image img {
    transform: scale(1.05);
}

.product-info {
    padding: var(--space-4) 0;
}

.product-name {
    font-weight: 500;
    margin-bottom: var(--space-2);
}

.product-name a {
    color: var(--color-text);
    text-decoration: none;
}

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

.price-current {
    font-weight: 600;
    color: var(--color-primary);
}