/* ==========================================================================
   Catena 26 — Single Product Page CSS
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Product Page Layout
   -------------------------------------------------------------------------- */
.single-product-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: var(--sp-10);
    align-items: start;
    margin-bottom: var(--sp-12);
}

/* --------------------------------------------------------------------------
   2. Product Gallery
   -------------------------------------------------------------------------- */
.product-gallery {
    position: sticky;
    top: calc(var(--header-total) + var(--sp-4));
}

.product-gallery__main {
    position: relative;
    aspect-ratio: 1;
    background: var(--c-bg);
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid var(--c-border);
    margin-bottom: var(--sp-3);
}

.product-gallery__main .swiper {
    width: 100%;
    height: 100%;
}

.product-gallery__main-img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    padding: var(--sp-6);
    cursor: zoom-in;
}

/* Zoom badge */
.product-gallery__zoom-hint {
    position: absolute;
    bottom: var(--sp-3);
    right: var(--sp-3);
    background: rgba(255,255,255,.9);
    border-radius: var(--radius-sm);
    padding: var(--sp-2) var(--sp-3);
    font-size: var(--font-size-xs);
    color: var(--c-text-muted);
    display: flex;
    align-items: center;
    gap: var(--sp-1);
    backdrop-filter: blur(4px);
}

.product-gallery__zoom-hint svg {
    width: 14px;
    height: 14px;
}

/* Thumbnails */
.product-gallery__thumbs {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: var(--sp-2);
}

.product-gallery__thumb {
    aspect-ratio: 1;
    border: 2px solid var(--c-border);
    border-radius: var(--radius-sm);
    overflow: hidden;
    cursor: pointer;
    transition: border-color var(--transition);
    background: var(--c-bg);
}

.product-gallery__thumb img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    padding: var(--sp-2);
    transition: transform var(--transition);
}

.product-gallery__thumb:hover {
    border-color: var(--c-accent);
}

.product-gallery__thumb--active {
    border-color: var(--c-accent);
}

/* Swiper navigation */
.product-gallery .swiper-button-next,
.product-gallery .swiper-button-prev {
    width: 36px;
    height: 36px;
    background: rgba(255,255,255,.9);
    border-radius: 50%;
    box-shadow: var(--shadow-sm);
    color: var(--c-text);
    transition: background var(--transition), color var(--transition);
}

.product-gallery .swiper-button-next::after,
.product-gallery .swiper-button-prev::after {
    font-size: 14px;
    font-weight: 700;
    color: var(--c-primary);
}

.product-gallery .swiper-button-next:hover,
.product-gallery .swiper-button-prev:hover {
    background: var(--c-accent);
    color: #fff;
}

/* Lightbox overlay */
.gallery-lightbox {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,.92);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.gallery-lightbox__img {
    max-width: 90vw;
    max-height: 90vh;
    object-fit: contain;
}

.gallery-lightbox__close {
    position: absolute;
    top: var(--sp-5);
    right: var(--sp-5);
    color: rgba(255,255,255,.8);
    font-size: 32px;
    line-height: 1;
    transition: color var(--transition);
}

.gallery-lightbox__close:hover {
    color: #fff;
}

/* --------------------------------------------------------------------------
   3. Product Summary
   -------------------------------------------------------------------------- */
.product-summary {
    display: flex;
    flex-direction: column;
    gap: var(--sp-4);
}

/* Category / breadcrumb pills */
.product-summary__cats {
    display: flex;
    flex-wrap: wrap;
    gap: var(--sp-2);
}

.product-summary__cat {
    font-size: var(--font-size-xs);
    color: var(--c-accent);
    font-weight: 500;
    text-decoration: none;
    background: rgba(242,108,13,.08);
    padding: 3px var(--sp-3);
    border-radius: 20px;
    transition: background var(--transition), color var(--transition);
}

.product-summary__cat:hover {
    background: var(--c-accent);
    color: #fff;
}

/* Title */
.product-summary__title {
    font-size: var(--font-size-2xl);
    font-weight: 800;
    color: var(--c-primary);
    line-height: 1.25;
}

/* SKU + EAN meta */
.product-summary__meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--sp-4);
    font-size: var(--font-size-xs);
    color: var(--c-text-muted);
}

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

.product-meta-item__label {
    font-weight: 600;
    color: var(--c-text-muted);
}

.product-meta-item__value {
    color: var(--c-text);
}

/* Availability badge */
.product-summary__availability {
    display: inline-flex;
    align-items: center;
    gap: var(--sp-2);
    font-size: var(--font-size-sm);
    font-weight: 600;
    padding: var(--sp-2) var(--sp-4);
    border-radius: 20px;
    width: fit-content;
}

.product-summary__availability--in-stock {
    background: rgba(22,163,74,.1);
    color: var(--c-success);
}

.product-summary__availability--out-stock {
    background: rgba(107,114,128,.1);
    color: var(--c-text-muted);
}

.product-summary__availability svg {
    width: 14px;
    height: 14px;
    flex-shrink: 0;
}

/* Price block */
.product-summary__price-block {
    display: flex;
    flex-direction: column;
    gap: var(--sp-2);
}

.product-summary__price {
    font-size: var(--font-size-3xl);
    font-weight: 800;
    color: var(--c-text);
    line-height: 1.1;
}

.product-summary__price--sale {
    color: var(--c-sale);
}

.product-summary__price-regular {
    font-size: var(--font-size-lg);
    color: var(--c-text-muted);
    text-decoration: line-through;
    font-weight: 400;
}

.product-summary__price-save {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--c-sale);
    background: rgba(220,38,38,.08);
    padding: 2px var(--sp-3);
    border-radius: 12px;
    width: fit-content;
}

.product-summary__price-vat {
    font-size: var(--font-size-xs);
    color: var(--c-text-muted);
}

/* Attribute tags (montage) */
.product-attributes {
    display: flex;
    flex-wrap: wrap;
    gap: var(--sp-2);
    margin: var(--sp-2) 0;
}

.product-attribute-tag {
    display: inline-block;
    background: var(--c-bg);
    border: 1px solid var(--c-border);
    border-radius: 20px;
    padding: 3px var(--sp-3);
    font-size: var(--font-size-xs);
    font-weight: 500;
    color: var(--c-text-muted);
}

/* Add to cart area */
.product-summary__cart-area {
    border: 1px solid var(--c-border);
    border-radius: var(--radius-md);
    padding: var(--sp-5);
    background: var(--c-bg);
}

.product-summary__qty-row {
    display: flex;
    align-items: center;
    gap: var(--sp-3);
    margin-bottom: var(--sp-4);
}

.quantity-input {
    display: flex;
    align-items: center;
    border: 1px solid var(--c-border);
    border-radius: var(--radius-sm);
    overflow: hidden;
    background: var(--c-surface);
}

.quantity-input__btn {
    width: 40px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--c-text);
    font-size: var(--font-size-lg);
    transition: background var(--transition);
}

.quantity-input__btn:hover {
    background: var(--c-bg);
}

.quantity-input input[type="number"] {
    width: 56px;
    height: 48px;
    border: none;
    outline: none;
    text-align: center;
    font-size: var(--font-size-md);
    font-weight: 600;
    color: var(--c-text);
    background: transparent;
    -moz-appearance: textfield;
}

.quantity-input input[type="number"]::-webkit-inner-spin-button,
.quantity-input input[type="number"]::-webkit-outer-spin-button {
    -webkit-appearance: none;
}

.product-summary__add-btn {
    flex: 1;
    height: 48px;
    font-size: var(--font-size-md);
}

.product-summary__wishlist-btn {
    width: 48px;
    height: 48px;
    border: 1px solid var(--c-border);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--c-text-muted);
    background: var(--c-surface);
    transition: border-color var(--transition), color var(--transition);
    flex-shrink: 0;
}

.product-summary__wishlist-btn:hover {
    border-color: var(--c-accent);
    color: var(--c-accent);
}

.product-summary__wishlist-btn svg {
    width: 20px;
    height: 20px;
}

/* USPs under add to cart */
.product-summary__usps {
    display: flex;
    flex-direction: column;
    gap: var(--sp-2);
    margin-top: var(--sp-4);
    padding-top: var(--sp-4);
    border-top: 1px solid var(--c-border);
}

.product-usp {
    display: flex;
    align-items: center;
    gap: var(--sp-3);
    font-size: var(--font-size-xs);
    color: var(--c-text-muted);
}

.product-usp svg {
    width: 16px;
    height: 16px;
    color: var(--c-success);
    flex-shrink: 0;
}

/* --------------------------------------------------------------------------
   4. Product Tabs
   -------------------------------------------------------------------------- */
.product-tabs {
    margin-top: var(--sp-8);
    border-top: 1px solid var(--c-border);
    padding-top: var(--sp-6);
}

.product-tabs__nav {
    display: flex;
    gap: 0;
    border-bottom: 2px solid var(--c-border);
    margin-bottom: var(--sp-6);
    overflow-x: auto;
}

.product-tabs__tab {
    padding: var(--sp-3) var(--sp-6);
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--c-text-muted);
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    white-space: nowrap;
    cursor: pointer;
    transition: color var(--transition), border-color var(--transition);
    text-decoration: none;
    background: transparent;
}

.product-tabs__tab:hover {
    color: var(--c-accent);
}

.product-tabs__tab--active {
    color: var(--c-accent);
    border-bottom-color: var(--c-accent);
}

.product-tabs__panel {
    display: none;
}

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

/* Attributes table in specs tab */
.product-specs-table {
    width: 100%;
    border-collapse: collapse;
}

.product-specs-table tr {
    border-bottom: 1px solid var(--c-border);
}

.product-specs-table tr:hover {
    background: var(--c-bg);
}

.product-specs-table th {
    width: 40%;
    padding: var(--sp-3) var(--sp-4);
    text-align: left;
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--c-text-muted);
    background: var(--c-bg);
}

.product-specs-table td {
    padding: var(--sp-3) var(--sp-4);
    font-size: var(--font-size-sm);
    color: var(--c-text);
}

/* --------------------------------------------------------------------------
   5. Related Products
   -------------------------------------------------------------------------- */
.related-products {
    margin-top: var(--sp-12);
}

.related-products .swiper {
    padding-bottom: var(--sp-8);
}

.related-products .swiper-slide {
    height: auto;
}

.related-products .product-card {
    height: 100%;
}

.related-products .swiper-button-next,
.related-products .swiper-button-prev {
    width: 40px;
    height: 40px;
    background: var(--c-surface);
    border: 1px solid var(--c-border);
    border-radius: 50%;
    box-shadow: var(--shadow-sm);
    transition: background var(--transition), border-color var(--transition);
}

.related-products .swiper-button-next::after,
.related-products .swiper-button-prev::after {
    font-size: 16px;
    font-weight: 700;
    color: var(--c-primary);
}

.related-products .swiper-button-next:hover,
.related-products .swiper-button-prev:hover {
    background: var(--c-accent);
    border-color: var(--c-accent);
}

.related-products .swiper-button-next:hover::after,
.related-products .swiper-button-prev:hover::after {
    color: #fff;
}

/* --------------------------------------------------------------------------
   6. Variable Product — Variation Swatches
   -------------------------------------------------------------------------- */
.variation-row {
    margin-bottom: var(--sp-4);
}

.variation-row__label {
    font-size: var(--font-size-sm);
    font-weight: 600;
    margin-bottom: var(--sp-2);
    color: var(--c-text);
}

.variation-row__label span {
    font-weight: 400;
    color: var(--c-text-muted);
    margin-left: var(--sp-2);
}

.variation-swatches {
    display: flex;
    flex-wrap: wrap;
    gap: var(--sp-2);
}

.swatch-btn {
    padding: var(--sp-2) var(--sp-3);
    border: 1px solid var(--c-border);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: border-color var(--transition), background var(--transition), color var(--transition);
    background: var(--c-surface);
    color: var(--c-text);
}

.swatch-btn:hover {
    border-color: var(--c-accent);
    color: var(--c-accent);
}

.swatch-btn--active {
    background: var(--c-accent);
    border-color: var(--c-accent);
    color: #fff;
}

.swatch-btn--disabled {
    opacity: 0.4;
    cursor: not-allowed;
    text-decoration: line-through;
}

/* --------------------------------------------------------------------------
   7. Responsive — Product
   -------------------------------------------------------------------------- */
@media (max-width: 900px) {
    .single-product-layout {
        grid-template-columns: 1fr;
        gap: var(--sp-6);
    }

    .product-gallery {
        position: static;
    }

    .product-gallery__thumbs {
        grid-template-columns: repeat(6, 1fr);
    }

    .product-tabs__nav {
        gap: 0;
    }

    .product-tabs__tab {
        padding: var(--sp-3) var(--sp-4);
    }
}

@media (max-width: 480px) {
    .product-summary__title {
        font-size: var(--font-size-xl);
    }

    .product-summary__price {
        font-size: var(--font-size-2xl);
    }

    .product-gallery__thumbs {
        grid-template-columns: repeat(5, 1fr);
    }

    .product-summary__qty-row {
        flex-wrap: wrap;
    }
}