/* grid */
        #product-list {
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
        }

        /* 📱 Mobile (ค่าเริ่มต้น) */
        .product-card {
            width: 45%;
            background: #fff;
            border: 1px solid #eee;
            border-radius: 10px;
            padding: 10px;
            position: relative;
            transition: 0.2s;
        }

        /* 📱 Tablet (≥576px) */
        @media (min-width: 576px) {
            .product-card {
                width: 45%;
            }
        }

        /* 💻 Desktop (≥992px) */
        @media (min-width: 992px) {
            .product-card {
                width: 23%;
            }
        }

        .product-card:hover {
            box-shadow: 0 5px 20px rgba(0,0,0,0.1);
            transform: translateY(-3px);
        }

        /* image */
        .product-img {
            height: 150px;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .product-img img {
            max-height: 140px;
            max-width: 100%;
        }

        /* title */
        .product-title {
            font-size: 14px;
            height: 40px;
            overflow: hidden;
            margin: 5px 0;
        }


        /* loading */
        #loading {
            width: 100%;
            text-align: center;
            padding: 20px;
        }

        /* stock label */
        .stock-label {
            position: absolute;
            top: 10px;
            left: 10px;
            font-size: 11px;
            padding: 3px 8px;
            border-radius: 4px;
            color: #fff;
        }

        .in-stock {
            background: #28a745;
        }

        .out-stock {
            background: #dc3545;
        }

        /* title */
        .product-title {
            font-size: 14px;
            height: 40px;
            overflow: hidden;
            margin: 5px 0;
        }

        /* mpn */
        .product-mpn {
            font-size: 12px;
            color: #888;
        }

        /* price */
        .product-price {
            font-weight: bold;
            color: #e60023;
            margin-top: 5px;
        }

        /* skeleton */
        .skeleton {
            animation: pulse 1.5s infinite;
            background: #eee;
            border-radius: 8px;
        }

        @keyframes pulse {
            0% { opacity: 1; }
            50% { opacity: 0.4; }
            100% { opacity: 1; }
        }