/* ============================================
   PRODUCT PAGE REDESIGN — inttools.ru
   Стиль Петрович: вертикальная галерея, табы, тени
   ============================================ */

/* --- CSS Variables --- */
:root {
    --product-accent: #8CCE49;
    --product-accent-hover: #7AB83F;
    --product-price-color: #DC4D3A;
    --product-text: #2C2C2C;
    --product-text-muted: #848484;
    --product-bg: #FFFFFF;
    --product-bg-light: #F9F9F9;
    --product-border: #F1F1F1;
    --product-shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
    --product-shadow-hover: 0 8px 32px rgba(0, 0, 0, 0.1);
    --product-radius: 16px;
    --product-radius-sm: 10px;
    --product-transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ==========================
   GALLERY — Vertical Thumbnails
   ========================== */

.product-gallery {
    display: flex;
    gap: 16px;
    align-items: flex-start;
}

.product-gallery__thumbs {
    display: flex;
    flex-direction: column;
    gap: 8px;
    flex-shrink: 0;
    width: 80px;
    max-height: 550px;
    overflow-y: auto;
    overflow-x: hidden;
    scrollbar-width: thin;
    scrollbar-color: var(--product-border) transparent;
}

.product-gallery__thumbs::-webkit-scrollbar {
    width: 3px;
}

.product-gallery__thumbs::-webkit-scrollbar-track {
    background: transparent;
}

.product-gallery__thumbs::-webkit-scrollbar-thumb {
    background-color: #ddd;
    border-radius: 3px;
}

.product-gallery__thumb {
    width: 80px;
    height: 80px;
    border: 2px solid var(--product-border);
    border-radius: var(--product-radius-sm);
    overflow: hidden;
    cursor: pointer;
    transition: border-color var(--product-transition), box-shadow var(--product-transition);
    flex-shrink: 0;
}

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

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

.product-gallery__thumb img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
}

.product-gallery__main {
    flex: 1;
    border: 2px solid var(--product-border);
    border-radius: var(--product-radius);
    overflow: visible;
    background: var(--product-bg);
    cursor: crosshair;
    position: relative;
}

.product-gallery__main a {
    display: block;
    overflow: hidden;
    border-radius: var(--product-radius);
}

.product-gallery__main img {
    width: 100%;
    height: auto;
    display: block;
    max-height: 550px;
    object-fit: contain;
}

/* Drift Zoom overrides */
.product-gallery {
    position: relative;
}

.drift-zoom-pane {
    position: absolute !important;
    top: 0 !important;
    left: calc(100% + 12px) !important;
    right: auto !important;
    bottom: auto !important;
    margin-left: 0 !important;
    width: 450px !important;
    height: 450px !important;
    max-width: 450px !important;
    max-height: 450px !important;
    border-radius: var(--product-radius) !important;
    box-shadow: 0 8px 40px rgba(0, 0, 0, 0.15) !important;
    z-index: 200 !important;
    border: 2px solid var(--product-border) !important;
    background: #fff !important;
    pointer-events: none !important;
    overflow: hidden !important;
    transform: none !important;
}

.drift-zoom-pane.drift-opening {
    animation: none !important;
}

.drift-zoom-pane.drift-closing {
    animation: none !important;
}

.drift-zoom-pane img {
    max-width: none !important;
    max-height: none !important;
}

.drift-bounding-box {
    background: rgba(140, 206, 73, 0.2) !important;
    border: 2px solid var(--product-accent) !important;
    border-radius: 4px !important;
    z-index: 100 !important;
    pointer-events: none !important;
}


/* ==========================
   TABS — Classic Switchable
   ========================== */

.product-tabs-nav {
    display: flex;
    gap: 0;
    border-bottom: 2px solid var(--product-border);
    margin-top: 30px;
    background: var(--product-bg);
    padding: 0;
    list-style: none;
}

.product-tabs-nav__item {
    padding: 14px 24px;
    font-weight: 700;
    font-size: 14px;
    line-height: 20px;
    letter-spacing: 0.02em;
    text-transform: uppercase;
    color: var(--product-text-muted);
    cursor: pointer;
    border-bottom: 3px solid transparent;
    margin-bottom: -2px;
    transition: color var(--product-transition), border-color var(--product-transition);
    white-space: nowrap;
    user-select: none;
}

.product-tabs-nav__item:hover {
    color: var(--product-text);
}

.product-tabs-nav__item.active {
    color: var(--product-accent);
    border-bottom-color: var(--product-accent);
}

.product-tab-content {
    display: none;
    padding-top: 30px;
    animation: tabFadeIn 0.3s ease;
}

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

@keyframes tabFadeIn {
    from {
        opacity: 0;
        transform: translateY(8px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Hide old tabs navigation */
.tabs {
    display: none !important;
}

/* ==========================
   INFO BLOCK (О товаре)
   ========================== */

.info {
    background: var(--product-bg);
    border: none;
    border-radius: var(--product-radius);
    padding: 0;
    margin-top: 0;
    box-shadow: none;
}

.info-images {
    display: none;
    /* hidden - using new gallery */
}

.info-description {
    font-size: 15px;
    line-height: 26px;
    color: #555;
}

.info-description p {
    margin-bottom: 12px;
}

.info-description img {
    max-width: 100%;
    border-radius: var(--product-radius-sm);
}

/* ==========================
   SPECIFICATION BLOCK
   ========================== */

.specification {
    background: var(--product-bg);
    border: none;
    border-radius: var(--product-radius);
    padding: 0;
    margin-top: 0;
    box-shadow: none;
}

.specification-title {
    font-size: 20px;
    line-height: 28px;
    padding-bottom: 20px;
    font-weight: 700;
    color: var(--product-text);
}

.specification-items {
    background: var(--product-bg-light);
    border-radius: var(--product-radius-sm);
    padding: 20px 24px;
}

.specification-item {
    padding: 10px 0;
    border-bottom: 1px solid var(--product-border);
}

.specification-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.specification-item__title {
    font-weight: 600;
    font-size: 14px;
    line-height: 22px;
    color: var(--product-text-muted);
}

.specification-item__separator {
    border-bottom: 1px dashed #ddd;
    height: 1px;
    margin: 0 12px;
}

.specification-item__description {
    font-weight: 600;
    font-size: 14px;
    line-height: 22px;
    color: var(--product-text);
}


/* ==========================
   DELIVERY BLOCK
   ========================== */

.delivery,
.pickup,
.docs {
    border: none;
    border-radius: var(--product-radius);
    box-shadow: var(--product-shadow);
    transition: box-shadow var(--product-transition);
    margin-top: 20px;
}

.delivery:hover,
.pickup:hover,
.docs:hover {
    box-shadow: var(--product-shadow-hover);
}


/* ==========================
   REVIEWS BLOCK
   ========================== */

.reviews {
    border: none;
    border-radius: var(--product-radius);
    box-shadow: var(--product-shadow);
    margin-top: 0;
    transition: box-shadow var(--product-transition);
}

.reviews:hover {
    box-shadow: var(--product-shadow-hover);
}


/* ==========================
   SIDEBAR — Buyer Block (enhanced)
   ========================== */

.buyer {
    border-radius: var(--product-radius);
    box-shadow: var(--product-shadow);
    transition: box-shadow var(--product-transition);
    border: 1px solid var(--product-border);
}

.buyer:hover {
    box-shadow: var(--product-shadow-hover);
}

.buyer-price {
    font-weight: 800 !important;
    font-size: 32px !important;
    line-height: 40px !important;
    color: var(--product-price-color) !important;
}

.buyer-oldprice {
    font-weight: 600;
    color: var(--product-text-muted);
}

#button-cart {
    background: var(--product-accent);
    border: none;
    border-radius: var(--product-radius-sm);
    font-weight: 700;
    font-size: 16px;
    letter-spacing: 0.02em;
    padding: 14px 24px;
    transition: background var(--product-transition), transform var(--product-transition), box-shadow var(--product-transition);
}

#button-cart:hover {
    background: var(--product-accent-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 16px rgba(140, 206, 73, 0.3);
}

#button-cart:active {
    transform: translateY(0);
}


/* ==========================
   PROMO BLOCK (enhanced)
   ========================== */

.promo {
    padding: 40px 50px 0;
}

.promo-item {
    padding: 16px 0;
    border-bottom: 1px solid var(--product-border);
    transition: background var(--product-transition);
}

.promo-item:last-child {
    border-bottom: none;
}

.promo-item__icon {
    transition: transform var(--product-transition);
}

.promo-item:hover .promo-item__icon {
    transform: scale(1.1);
}


/* ==========================
   MANUFACTURER BLOCK
   ========================== */

.manufacturer {
    padding-bottom: 30px;
}

.manufacturer-img {
    transition: opacity var(--product-transition);
}

.manufacturer-img:hover {
    opacity: 0.8;
}


/* ==========================
   ACTION BUTTONS (compare, wishlist)
   ========================== */

.info-compare,
.info-wishlist {
    transition: transform var(--product-transition);
    padding: 8px;
    border-radius: 8px;
}

.info-compare:hover,
.info-wishlist:hover {
    transform: scale(1.15);
    background: var(--product-bg-light);
}

.info-compare__icon,
.info-wishlist__icon {
    transition: fill var(--product-transition);
}


/* ==========================
   PRODUCT COUNT (quantity)
   ========================== */

.product-count {
    border-radius: var(--product-radius-sm);
    overflow: hidden;
    border: 2px solid var(--product-border);
    transition: border-color var(--product-transition);
    display: inline-flex;
    align-items: center;
    height: 44px;
}

.product-count:focus-within {
    border-color: var(--product-accent);
}

.product-count__button {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--product-bg);
    border: none;
    cursor: pointer;
    transition: background var(--product-transition);
    padding: 0;
    font-size: 18px;
    font-weight: 600;
    color: var(--product-text);
    line-height: 1;
}

.product-count__button:hover {
    background: var(--product-bg-light);
}

.product-count__button svg {
    fill: var(--product-text);
}

.product-count__input {
    width: 50px;
    height: 40px;
    text-align: center;
    border: none;
    border-left: 1px solid var(--product-border);
    border-right: 1px solid var(--product-border);
    font-size: 16px;
    font-weight: 700;
    color: var(--product-text);
    background: var(--product-bg);
    outline: none;
    -moz-appearance: textfield;
    appearance: textfield;
}

/* Hide native number spinners */
.product-count__input::-webkit-outer-spin-button,
.product-count__input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}


/* ==========================
   RELATED PRODUCTS
   ========================== */

.related {
    padding-top: 50px;
}

.related-title {
    font-size: 28px;
    font-weight: 700;
}


/* ==========================
   H1 TITLE (enhanced)
   ========================== */

.h1 {
    font-size: 30px;
    line-height: 40px;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--product-text);
}


/* ==========================
   INFO-META (rating, stock, article)
   ========================== */

.info-quantity__title {
    font-weight: 700;
    font-size: 12px;
    letter-spacing: 0.03em;
}

.info-article {
    font-size: 13px;
    color: var(--product-text-muted);
}


/* ==========================
   BREADCRUMBS (subtle enhancement)
   ========================== */

.breadcrumb li a {
    transition: color var(--product-transition);
}


/* ==========================
   POPUP (review form)
   ========================== */

.popup {
    border-radius: var(--product-radius);
}

.popup-title {
    font-weight: 700;
}


/* ==========================
   MOBILE RESPONSIVE
   ========================== */

@media (max-width: 1199px) {
    .drift-zoom-pane {
        display: none !important;
    }
}

@media (max-width: 991px) {
    .product-tabs-nav__item {
        padding: 12px 16px;
        font-size: 12px;
    }
}

@media (max-width: 767px) {

    /* Gallery — horizontal thumbnails */
    .product-gallery {
        flex-direction: column-reverse;
        gap: 10px;
    }

    .product-gallery__thumbs {
        flex-direction: row;
        width: 100%;
        max-height: none;
        overflow-x: auto;
        overflow-y: hidden;
        gap: 8px;
        padding-bottom: 4px;
        scroll-snap-type: x mandatory;
        -webkit-overflow-scrolling: touch;
    }

    .product-gallery__thumb {
        width: 64px;
        height: 64px;
        scroll-snap-align: start;
    }

    .product-gallery__main {
        border-radius: var(--product-radius-sm);
        cursor: pointer;
    }

    .product-gallery__main img {
        max-height: 350px;
    }

    /* Tabs — horizontal scroll */
    .product-tabs-nav {
        overflow-x: auto;
        overflow-y: hidden;
        -webkit-overflow-scrolling: touch;
        scroll-snap-type: x mandatory;
        gap: 0;
        margin-top: 20px;
        scrollbar-width: none;
    }

    .product-tabs-nav::-webkit-scrollbar {
        display: none;
    }

    .product-tabs-nav__item {
        scroll-snap-align: start;
        padding: 10px 14px;
        font-size: 11px;
    }

    .product-tab-content {
        padding-top: 15px;
    }

    /* Title */
    .h1 {
        font-size: 22px;
        line-height: 30px;
        margin-bottom: 12px;
    }

    /* Buyer block */
    .buyer {
        border-radius: var(--product-radius-sm);
        padding: 16px;
    }

    .buyer-price {
        font-size: 26px !important;
        line-height: 32px !important;
    }

    .buyer-prices {
        padding-bottom: 20px;
    }

    /* Promo */
    .promo {
        padding: 16px 16px 0;
    }

    /* Specification */
    .specification-items {
        padding: 14px 16px;
    }

    .specification-title {
        font-size: 18px;
        padding-bottom: 14px;
    }

    /* Delivery / Pickup / Docs */
    .delivery,
    .pickup,
    .docs {
        border-radius: var(--product-radius-sm);
        padding: 16px;
        margin-top: 12px;
    }

    /* Reviews */
    .reviews {
        border-radius: var(--product-radius-sm);
        padding: 16px;
    }

    /* Related */
    .related {
        padding-top: 30px;
    }

    .related-title {
        font-size: 22px;
    }

    /* Hide drift zoom on mobile */
    .drift-zoom-pane {
        display: none !important;
    }
}

@media (max-width: 480px) {
    .product-gallery__thumb {
        width: 56px;
        height: 56px;
    }

    .product-gallery__main img {
        max-height: 280px;
    }

    .buyer-price {
        font-size: 22px !important;
        line-height: 28px !important;
    }

    .product-tabs-nav__item {
        padding: 8px 10px;
        font-size: 10px;
    }
}