/* ОСНОВНЫЕ СТИЛИ */
.product-detail-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px;
    box-sizing: border-box;
}

.product-main {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: start;
}

/* GALLERY */
.product-gallery {
    position: relative;
}

.image-wrapper {
    position: relative;
    overflow: hidden;
    width: 100%;
    border-radius: 8px;
}

.image-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.2s ease;
    cursor: zoom-in;
}

/* Навигационные кнопки */
.nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(0,0,0,.6);
    color: white;
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    font-size: 24px;
    cursor: pointer;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.product-gallery:hover .nav {
    opacity: 1;
}

.prev { left: 15px; }
.next { right: 15px; }

/* Миниатюры */
.thumbnails {
    display: flex;
    gap: 10px;
    margin-top: 15px;
    flex-wrap: wrap;
    justify-content: center;
}

.thumb {
    width: 70px;
    height: 70px;
    object-fit: cover;
    cursor: pointer;
    border: 2px solid transparent;
    border-radius: 4px;
    transition: all 0.2s ease;
}

.thumb:hover {
    border-color: #666;
}

.thumb.active {
    border-color: #000;
}

/* INFO */
.product-info {
    padding: 0 20px;
}

.product-info h1 {
    font-size: 28px;
    margin: 0 0 15px 0;
    font-weight: 600;
}

.product-detail-container .price {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 25px;
    color: #000;
}

/* Размеры */
.product-detail-container .sizes {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 25px;
}

.product-detail-container .size {
    position: relative;
}

.product-detail-container .size input {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.product-detail-container .size span {
    display: inline-block;
    padding: 12px 20px;
    border: 1px solid #ddd;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.2s ease;
    min-width: 50px;
    text-align: center;
}

.product-detail-container .size input:checked + span {
    background: #000;
    color: #fff;
    border-color: #000;
}

.product-detail-container .size span:hover {
    border-color: #999;
}

/* Кнопка добавления в корзину */
#addToCartBtn {
    width: 100%;
    padding: 18px 24px;
    background: #000;
    color: #fff;
    border: none;
    border-radius: 4px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.3s ease;
    margin-top: 10px;
}

#addToCartBtn:disabled {
    background: #ccc;
    cursor: not-allowed;
}

#addToCartBtn:not(:disabled):hover {
    background: #333;
}

/* Сообщение о добавлении в корзину */
#cartMessage {
    margin-top: 15px;
    min-height: 24px;
    font-size: 14px;
}

.product-detail-container .ok {
    color: #27ae60;
    font-weight: 500;
}

.product-detail-container .err {
    color: #e74c3c;
    font-weight: 500;
}

/* Описание товара */
.product-description {
    margin-top: 30px;
    padding-top: 30px;
    border-top: 1px solid #eee;
    font-size: 15px;
    line-height: 1.6;
    color: #555;
}

.product-description p {
    margin-bottom: 15px;
}

/* Похожие товары */
.similar {
    max-width: 1200px;
    margin: 80px auto 0;
    padding: 0 40px;
    box-sizing: border-box;
}

.similar h2 {
    font-size: 24px;
    margin-bottom: 30px;
    font-weight: 600;
}

.similar-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.similar-grid a {
    text-decoration: none;
    color: inherit;
    display: block;
    transition: transform 0.3s ease;
}

.similar-grid a:hover {
    transform: translateY(-5px);
}

.similar-grid img {
    width: 100%;
    height: 280px;
    object-fit: cover;
    border-radius: 8px;
    margin-bottom: 15px;
}

.similar-grid .name {
    font-size: 14px;
    margin-bottom: 8px;
    color: #333;
    font-weight: 500;
}

.similar-grid .price {
    font-size: 16px;
    font-weight: 600;
    color: #000;
}

/* =========================
   MOBILE VERSION (FIXED)
========================= */
@media (max-width: 768px) {
    .product-detail-container {
        padding: 0;
        margin: 0;
        max-width: 100%;
    }

    .product-main {
        display: flex !important;
        flex-direction: column;
        gap: 0;
        width: 100%;
        margin: 0;
    }

    /* Галерея */
    .product-gallery {
        width: 100%;
        margin-bottom: 20px;
    }

    .image-wrapper {
        height: auto;
        max-height: 70vh;
    }

    .image-wrapper img {
        height: auto;
        max-height: 70vh;
        min-height: 300px;
        cursor: default;
    }

    /* Показываем кнопки навигации на мобильных */
    .nav {
        opacity: 1;
        width: 36px;
        height: 36px;
        font-size: 20px;
        background: rgba(0,0,0,.7);
    }

    /* Миниатюры - горизонтальный скролл */
    .thumbnails {
        display: flex;
        flex-wrap: nowrap;
        overflow-x: auto;
        overflow-y: hidden;
        padding: 10px 16px;
        margin: 10px 0 0 0;
        gap: 8px;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
    }

    .thumbnails::-webkit-scrollbar {
        display: none;
    }

    .thumb {
        width: 60px;
        height: 60px;
        flex-shrink: 0;
    }

    /* Информация о товаре */
    .product-info {
        padding: 0 16px 20px;
        width: 100%;
        box-sizing: border-box;
    }

    .product-info h1 {
        font-size: 20px;
        margin-bottom: 12px;
    }

    .product-detail-container .price {
        font-size: 18px;
        margin-bottom: 20px;
    }

    .product-detail-container .sizes {
        gap: 8px;
        margin-bottom: 20px;
    }

    .product-detail-container .size span {
        padding: 10px 16px;
        font-size: 13px;
        min-width: 44px;
    }

    /* Кнопка */
    #addToCartBtn {
        padding: 16px 20px;
        font-size: 16px;
        position: sticky;
        bottom: 0;
        z-index: 10;
        border-radius: 0;
        margin-top: 0;
    }

    /* Описание */
    .product-description {
        margin-top: 20px;
        padding-top: 20px;
        font-size: 14px;
        line-height: 1.5;
    }

    /* Похожие товары */
    .similar {
        margin: 40px 0 0;
        padding: 0 16px 20px;
        width: 100%;
        box-sizing: border-box;
    }

    .similar h2 {
        font-size: 20px;
        margin-bottom: 20px;
        padding: 0;
    }

    .similar-grid {
        display: flex;
        flex-direction: row;
        flex-wrap: nowrap;
        overflow-x: auto;
        overflow-y: hidden;
        gap: 16px;
        padding: 0 0 10px 0;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
    }

    .similar-grid::-webkit-scrollbar {
        display: none;
    }

    .similar-grid a {
        flex: 0 0 75%;
        max-width: 75%;
    }

    .similar-grid img {
        height: 200px;
        margin-bottom: 10px;
    }

    .similar-grid .name {
        font-size: 13px;
        margin-bottom: 6px;
    }

    .similar-grid .price {
        font-size: 14px;
    }
}

/* Мелкие экраны */
@media (max-width: 480px) {
    .image-wrapper {
        max-height: 60vh;
    }

    .image-wrapper img {
        max-height: 60vh;
        min-height: 250px;
    }

    .thumb {
        width: 50px;
        height: 50px;
    }

    .product-info h1 {
        font-size: 18px;
    }

    .product-detail-container .price {
        font-size: 16px;
    }

    #addToCartBtn {
        padding: 14px 16px;
        font-size: 15px;
    }

    .similar-grid a {
        flex: 0 0 85%;
        max-width: 85%;
    }

    .similar-grid img {
        height: 180px;
    }
}