/* ============================================
   Product Detail Page
   ============================================ */
.product-detail {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
}

.product-detail__media {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.product-detail__gallery-main {
    position: relative;
    background: var(--color-off-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--color-light-gray);
}

.product-detail__gallery-main img {
    width: 100%;
    max-height: 540px;
    display: block;
    object-fit: contain;
}

.product-detail__gallery-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-gray);
}

.product-detail__gallery-thumbs {
    display: flex;
    gap: var(--space-sm);
    flex-wrap: wrap;
}

.product-detail__thumb {
    width: 80px;
    height: 80px;
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 2px solid var(--color-light-gray);
    cursor: pointer;
    transition: border-color var(--duration-hover) var(--ease-smooth);
}

.product-detail__thumb:hover {
    border-color: var(--color-primary);
}

.product-detail__thumb--active {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 1px var(--color-primary);
}

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

.product-detail__category {
    font-size: var(--text-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--color-secondary-dark);
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.product-detail__title {
    font-size: 1.75rem;
    font-weight: var(--font-weight-extrabold);
    color: var(--color-neutral);
    margin: var(--space-sm) 0;
    line-height: 1.3;
}

.product-detail__sku {
    font-size: var(--text-sm);
    color: var(--color-gray);
    margin-bottom: var(--space-lg);
}

.product-detail__pricing {
    margin-bottom: var(--space-lg);
}

.product-detail__price {
    font-size: var(--text-4xl);
    font-weight: var(--font-weight-extrabold);
    color: var(--color-neutral);
}

.product-detail__price--sale {
    color: var(--color-danger);
}

.product-detail__price--original {
    font-size: var(--text-lg);
    color: var(--color-gray);
    text-decoration: line-through;
    margin-left: 0.75rem;
}

.product-detail__save-badge {
    display: inline-block;
    margin-left: var(--space-sm);
    padding: 0.2rem 0.6rem;
    background: rgba(220, 53, 69, 0.1);
    color: var(--color-danger);
    font-size: var(--text-xs);
    font-weight: var(--font-weight-bold);
    border-radius: var(--radius-full);
}

.product-detail__stock {
    margin-bottom: var(--space-lg);
    padding: 0.75rem 1rem;
    border-radius: var(--radius-md);
    font-size: var(--text-sm);
    font-weight: var(--font-weight-semibold);
}

.product-detail__stock--in {
    background: rgba(40, 167, 69, 0.1);
    color: #065f46;
}

.product-detail__stock--out {
    background: rgba(220, 53, 69, 0.1);
    color: #991b1b;
}

.product-detail__short-desc {
    color: var(--color-neutral-lighter);
    line-height: 1.7;
    margin-bottom: var(--space-lg);
}

/* Quantity Selector */
.qty-selector {
    display: flex;
    gap: 1rem;
    align-items: center;
    margin-bottom: var(--space-xl);
}

.qty-selector__control {
    display: flex;
    align-items: center;
    border: 1px solid var(--color-light-gray);
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--color-surface);
    height: 48px;
}

.qty-selector__btn {
    width: 48px;
    height: 48px;
    border: none;
    background: transparent;
    cursor: pointer;
    font-size: 1.25rem;
    font-weight: var(--font-weight-bold);
    color: var(--color-neutral);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color var(--duration-hover) var(--ease-smooth),
                color var(--duration-hover) var(--ease-smooth);
    user-select: none;
    line-height: 1;
}

.qty-selector__btn:hover {
    background-color: var(--color-primary);
    color: var(--color-white);
}

.qty-selector__btn:active {
    transform: scale(0.92);
}

.qty-selector__input {
    width: 52px;
    height: 48px;
    text-align: center;
    border: none;
    border-left: 1px solid var(--color-light-gray);
    border-right: 1px solid var(--color-light-gray);
    background: var(--color-bg-main);
    font-size: var(--text-base);
    font-weight: var(--font-weight-bold);
    font-family: inherit;
    color: var(--color-neutral);
    -moz-appearance: textfield;
    appearance: textfield;
}

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

.qty-selector__input:focus {
    outline: none;
    background: var(--color-surface);
}

.qty-selector__submit {
    flex: 1;
    height: 48px;
}

/* Product Specs */
.product-detail__specs {
    border-top: 1px solid var(--color-light-gray);
    padding-top: var(--space-lg);
}

.product-detail__specs-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
    font-size: var(--text-sm);
}

.product-detail__specs-grid strong {
    color: var(--color-neutral-lighter);
}

/* Material Tags */
.product-detail__materials {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    margin-bottom: var(--space-lg);
}

.product-detail__material-tag {
    display: inline-block;
    padding: 0.25rem 0.65rem;
    font-size: 0.7rem;
    font-weight: var(--font-weight-semibold);
    color: var(--color-primary-light);
    background: rgba(139, 26, 43, 0.08);
    border: 1px solid rgba(139, 26, 43, 0.15);
    border-radius: 100px;
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    transition: background var(--duration-hover) var(--ease-smooth),
                color var(--duration-hover) var(--ease-smooth);
}

.product-detail__material-tag:hover {
    background: rgba(139, 26, 43, 0.16);
    color: var(--color-primary);
}

/* Specs Title */
.product-detail__specs-title {
    font-size: var(--text-base);
    font-weight: var(--font-weight-bold);
    color: var(--color-neutral);
    margin-bottom: var(--space-md);
}

/* Unified Section Titles */
.product-detail__section-title {
    font-size: var(--text-xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
    margin-bottom: var(--space-lg);
}

/* Video player overlay in main gallery area */
.product-detail__video-player {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-black);
    z-index: 2;
}

.product-detail__video-player iframe {
    width: 100%;
    height: 100%;
    border: 0;
}

/* Video thumbnail — same size as image thumbs, with play overlay */
.product-detail__thumb--video {
    position: relative;
}

.product-detail__thumb-play {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.65);
    color: #fff;
    font-size: 12px;
    border-radius: 50%;
    pointer-events: none;
    transition: background var(--duration-hover) var(--ease-smooth);
}

.product-detail__thumb--video:hover .product-detail__thumb-play {
    background: rgba(139, 26, 43, 0.85);
}

/* ============================================
   Product Tabs: Details | Reviews
   ============================================ */
.product-tabs {
    margin-top: var(--space-3xl);
    border-top: 1px solid var(--color-light-gray);
    padding-top: var(--space-xl);
}

.product-tabs__nav {
    display: flex;
    gap: 0;
    border-bottom: 2px solid var(--color-light-gray);
    margin-bottom: 0;
}

.product-tabs__btn {
    padding: 0.85rem 1.75rem;
    font-size: var(--text-base);
    font-weight: var(--font-weight-semibold);
    font-family: inherit;
    color: var(--color-gray);
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    cursor: pointer;
    transition: color var(--duration-hover) var(--ease-smooth),
                border-color var(--duration-hover) var(--ease-smooth);
    letter-spacing: 0.01em;
}

.product-tabs__btn:hover {
    color: var(--color-neutral);
}

.product-tabs__btn--active {
    color: var(--color-primary);
    border-bottom-color: var(--color-primary);
}

.product-tabs__content {
    padding: var(--space-xl) 0;
}

.product-tabs__panel {
    display: none;
}

.product-tabs__panel--active {
    display: block;
}

.product-tabs__specs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
    font-size: var(--text-sm);
    color: var(--color-neutral);
    margin-bottom: var(--space-xl);
    padding-bottom: var(--space-xl);
    border-bottom: 1px solid var(--color-light-gray);
}

.product-tabs__specs strong {
    color: var(--color-neutral-lighter);
}

.product-tabs__description {
    color: var(--color-neutral-lighter);
    line-height: 1.85;
    max-width: 800px;
    font-size: var(--text-base);
}

.product-tabs__empty {
    color: var(--color-gray);
    font-style: italic;
}

.product-tabs__reviews-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-md);
    padding: var(--space-3xl) var(--space-xl);
    text-align: center;
    color: var(--color-gray);
}

.product-tabs__reviews-placeholder svg {
    opacity: 0.4;
}

.product-tabs__reviews-placeholder p {
    font-size: var(--text-sm);
    max-width: 320px;
}

/* Related Products */
.related-products {
    margin-top: var(--space-3xl);
    padding-top: var(--space-xl);
    border-top: 1px solid var(--color-light-gray);
}

/* Zoomable main image cursor */
.product-detail__zoomable {
    cursor: zoom-in;
}

/* ============================================
   Lightbox / Image Zoom Modal
   ============================================ */
.lightbox {
    position: fixed;
    inset: 0;
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.85);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--duration-hover) var(--ease-smooth),
                visibility var(--duration-hover) var(--ease-smooth);
}

.lightbox--open {
    opacity: 1;
    visibility: visible;
}

.lightbox__img {
    max-width: 90vw;
    max-height: 90vh;
    object-fit: contain;
    border-radius: var(--radius-md);
    transition: transform 0.2s var(--ease-smooth);
    user-select: none;
    -webkit-user-drag: none;
}

.lightbox__close {
    position: absolute;
    top: 1.25rem;
    right: 1.5rem;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    color: var(--color-white);
    font-size: 1.5rem;
    cursor: pointer;
    transition: background var(--duration-hover) var(--ease-smooth);
    z-index: 10000;
    line-height: 1;
}

.lightbox__close:hover {
    background: rgba(255, 255, 255, 0.2);
}

/* Product Detail Responsive */
@media (max-width: 1024px) {
    .product-detail {
        gap: var(--space-xl);
    }
}

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

    .product-detail__specs-grid {
        grid-template-columns: 1fr;
    }
}