/* ===================== PRODUCT DETAILS - PREMIUM B2B STYLE ===================== */

/* Основной контейнер */
.product-details-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 2rem;
}

@media (max-width: 768px) {
    .product-details-container {
        padding: 0 1rem;
    }
}

/* ===================== ХЛЕБНЫЕ КРОШКИ ===================== */
.product-breadcrumb {
    padding: 1.5rem 0;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-light);
    margin-bottom: 2rem;
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

.breadcrumb-item {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

    .breadcrumb-item.active {
        color: var(--text-primary);
        font-weight: 500;
    }

/* ===================== ОСНОВНАЯ СЕТКА ТОВАРА ===================== */
.product-main-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    margin-bottom: 4rem;
}

@media (max-width: 1024px) {
    .product-main-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}

/* ===================== ГАЛЕРЕЯ ИЗОБРАЖЕНИЙ ===================== */
.product-gallery {
    background: var(--bg-card);
    border-radius: 16px;
    overflow: hidden;
    transition: background-color 0.3s ease;
}

.product-main-image {
    position: relative;
    padding-top: 75%;
    background: var(--bg-secondary);
    border-radius: 12px;
    overflow: hidden;
    margin-bottom: 1rem;
}

    .product-main-image img {
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        object-fit: contain;
        padding: 2rem;
        transition: transform 0.5s ease;
    }

.product-thumbnails {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0.75rem;
}

.product-thumb {
    position: relative;
    padding-top: 75%;
    background: var(--bg-secondary);
    border-radius: 8px;
    overflow: hidden;
    cursor: pointer;
    border: 2px solid transparent;
    transition: var(--transition);
}

    .product-thumb:hover,
    .product-thumb.active {
        border-color: var(--accent-blue);
    }

    .product-thumb img {
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        object-fit: contain;
        padding: 0.75rem;
    }

/* ===================== ИНФОРМАЦИЯ О ТОВАРЕ ===================== */
.product-info {
    padding: 0 1rem;
}

.product-header {
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-light);
}

.product-article {
    color: var(--text-muted);
    font-size: 0.875rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    margin-bottom: 0.75rem;
}

.product-title {
    font-size: 1.75rem;
    font-weight: 700;
    line-height: 1.2;
    color: var(--text-primary);
    margin-bottom: 1rem;
    letter-spacing: -0.02em;
}

.product-manufacturer {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: 1.5rem;
}

.manufacturer-logo {
    width: 24px;
    height: 24px;
    border-radius: 4px;
    overflow: hidden;
}

/* ===================== ЦЕНА И НАЛИЧИЕ ===================== */
.product-pricing {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow-sm);
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

.price-section {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

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

.product-stock-status {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    font-size: 0.875rem;
    font-weight: 500;
}

.stock-available {
    background: rgba(40, 167, 69, 0.1);
    color: #28a745;
}

.stock-unavailable {
    background: rgba(108, 117, 125, 0.1);
    color: var(--text-secondary);
}

.product-min-order {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: 1.5rem;
}

/* ===================== ФОРМА ЗАКАЗА ===================== */
.order-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.quantity-selector {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 0.5rem;
}

.quantity-input {
    width: 100px;
    text-align: center;
    border: 1px solid var(--border-medium);
    border-radius: 8px;
    padding: 0.75rem;
    font-size: 1rem;
    color: var(--text-primary);
    background: var(--bg-card);
}

.quantity-btn {
    width: 40px;
    height: 40px;
    border: 1px solid var(--border-medium);
    border-radius: 8px;
    background: var(--bg-card);
    color: var(--text-primary);
    cursor: pointer;
    transition: var(--transition);
}

    .quantity-btn:hover {
        border-color: var(--accent-blue);
        color: var(--accent-blue);
    }

.order-actions {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.btn-add-to-cart {
    flex: 1;
    background: var(--accent-blue);
    color: var(--white);
    border: none;
    padding: 1rem;
    border-radius: 8px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

    .btn-add-to-cart:hover {
        background: var(--accent-dark);
        transform: translateY(-1px);
        box-shadow: var(--shadow-md);
    }

.btn-request-price {
    flex: 1;
    background: transparent;
    border: 1px solid var(--border-medium);
    color: var(--text-primary);
    padding: 1rem;
    border-radius: 8px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

    .btn-request-price:hover {
        border-color: var(--accent-blue);
        color: var(--accent-blue);
    }

/* ===================== СПЕЦИФИКАЦИЯ ===================== */
.specs-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    margin-bottom: 2rem;
}

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

.spec-item {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: 8px;
    padding: 1rem;
}

.spec-label {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: 0.25rem;
}

.spec-value {
    color: var(--text-primary);
    font-weight: 500;
}

/* ===================== ТАБЫ С КОНТЕНТОМ ===================== */
.product-tabs {
    margin: 4rem 0;
}

.tab-nav {
    display: flex;
    border-bottom: 1px solid var(--border-light);
    margin-bottom: 2rem;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.tab-btn {
    padding: 1rem 1.5rem;
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    white-space: nowrap;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    flex-shrink: 0;
}

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

    .tab-btn.active {
        color: var(--accent-blue);
        border-bottom-color: var(--accent-blue);
    }

.tab-content {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: 12px;
    padding: 2rem;
    min-height: 200px;
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

.tab-pane {
    display: none;
    opacity: 0;
    transform: translateY(10px);
    transition: opacity 0.3s ease, transform 0.3s ease;
}

    .tab-pane.active {
        display: block;
        opacity: 1;
        transform: translateY(0);
    }

/* Специфичные стили для контента табов */
#description {
    line-height: 1.6;
    color: var(--text-primary);
}

    #description p {
        margin-bottom: 1rem;
    }

#specifications {
    overflow-x: auto;
}

.specs-table {
    width: 100%;
    border-collapse: collapse;
}

    .specs-table tr {
        border-bottom: 1px solid var(--border-light);
        transition: background-color 0.2s ease;
    }

        .specs-table tr:hover {
            background-color: rgba(0, 102, 204, 0.04);
        }

    .specs-table td {
        padding: 1rem 0;
        vertical-align: top;
    }

        .specs-table td:first-child {
            width: 30%;
            color: var(--text-secondary);
            font-weight: 500;
            padding-right: 2rem;
        }

        .specs-table td:last-child {
            color: var(--text-primary);
        }

#documentation {
    text-align: center;
    padding: 3rem 1rem;
}

    #documentation i {
        font-size: 3rem;
        margin-bottom: 1rem;
        display: block;
        color: var(--text-muted);
    }

/* ===================== ПОХОЖИЕ ТОВАРЫ ===================== */
.related-products {
    margin-top: 4rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-light);
}

.section-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 2rem;
    letter-spacing: -0.02em;
}

.related-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
}

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

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

/* ===================== АНИМАЦИИ ===================== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

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

@keyframes tabFadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

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

.tab-pane.active {
    animation: tabFadeIn 0.3s ease forwards;
}

/* Отладочные стили для табов */
.tab-btn {
    position: relative;
}

    .tab-btn.active::after {
        content: '';
        position: absolute;
        bottom: -2px;
        left: 0;
        right: 0;
        height: 2px;
        background: var(--accent-blue);
        border-radius: 2px;
    }

    .tab-btn.active {
        font-weight: 600;
    }

/* ===================== УТИЛИТЫ ===================== */
.text-center {
    text-align: center;
}

.mb-0 {
    margin-bottom: 0;
}

.mt-0 {
    margin-top: 0;
}

.d-flex {
    display: flex;
}

.align-items-center {
    align-items: center;
}

.justify-content-center {
    justify-content: center;
}

.gap-2 {
    gap: 0.5rem;
}

.gap-3 {
    gap: 1rem;
}