.header {
            --background-color: rgba(42, 44, 57, 0.9);
        }

        body {
            padding-top: 80px;
        }

        .product-detail-container {
            background: linear-gradient(135deg, #f8f9fa 0%, #ffffff 100%);
            border-radius: 25px;
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
        }

        .product-image {
            width: 100%;
            max-width: 500px;
            object-fit: cover;
            border-radius: 20px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
            transition: transform 0.3s ease;
        }

        .product-image:hover {
            transform: scale(1.05);
        }

        .product-title {
            font-size: 2.2rem;
            font-weight: 800;
            color: #2c3e50;
            margin-bottom: 20px;
            line-height: 1.3;
        }

        .product-price {
            font-size: 1.5rem;
            font-weight: 700;
            color: #27ae60;
            background: linear-gradient(135deg, #e8f5e8 0%, #d4edda 100%);
            border-radius: 15px;
            padding: 5px 8px;
            display: inline-block;
            box-shadow: 0 5px 15px rgba(39, 174, 96, 0.2);
            text-align: center;
            min-width: 150px;
        }

        .total-price {
            font-size: 1.5rem;
            font-weight: 700;
            color: #e74c3c;
            background: linear-gradient(135deg, #fdf2f2 0%, #fadbd8 100%);
            border-radius: 15px;
            padding: 5px 8px;
            display: inline-block;
            box-shadow: 0 5px 15px rgba(231, 76, 60, 0.2);
            text-align: center;
            min-width: 150px;
        }

        .product-specs {
            background: linear-gradient(135deg, #ffffff 0%, #f8f9fa 100%);
            border-radius: 20px;
            padding: 25px;
            margin-bottom: 25px;
            border-left: 5px solid #3498db;
        }

        .spec-item {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 12px 0;
            border-bottom: 1px solid #eee;
        }

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

        .spec-label {
            font-weight: 700;
            color: #2c3e50;
            font-size: 1.1rem;
        }

        .spec-value {
            font-weight: 600;
            color: #3498db;
            font-size: 1.1rem;
        }

        .btn-add-to-cart {
            background: linear-gradient(135deg, #e74c3c 0%, #c0392b 100%);
            border: none;
            border-radius: 15px;
            font-size: 1.1rem;
            font-weight: 600;
            padding: 10px 25px;
            color: white;
            transition: all 0.3s ease;
            box-shadow: 0 8px 25px rgba(231, 76, 60, 0.3);
        }

        .btn-add-to-cart:hover {
            background: linear-gradient(135deg, #c0392b 0%, #a93226 100%);
            transform: translateY(-3px);
            box-shadow: 0 15px 35px rgba(231, 76, 60, 0.4);
            color: white;
        }

        .btn-add-to-cart:disabled {
            background: linear-gradient(135deg, #95a5a6 0%, #7f8c8d 100%);
            transform: none;
            box-shadow: 0 5px 15px rgba(149, 165, 166, 0.3);
            cursor: not-allowed;
        }

        .btn-back {
            background: linear-gradient(135deg, #95a5a6 0%, #7f8c8d 100%);
            border: none;
            border-radius: 12px;
            font-size: 1rem;
            font-weight: 600;
            padding: 10px 20px;
            color: white;
            transition: all 0.3s ease;
        }

        .btn-back:hover {
            background: linear-gradient(135deg, #7f8c8d 0%, #6c7b7d 100%);
            transform: translateY(-2px);
            color: white;
        }

        .related-product-card {
            background: white;
            border-radius: 15px;
            padding: 20px;
            text-align: center;
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
            transition: all 0.3s ease;
            height: 100%;
        }

        .related-product-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.2);
        }

        .related-product-image {
            height: 150px;
            object-fit: cover;
            border-radius: 12px;
            margin-bottom: 15px;
        }

        .related-product-title {
            font-size: 1.1rem;
            font-weight: 700;
            color: #2c3e50;
            margin-bottom: 10px;
        }

        .related-product-price {
            font-size: 1.3rem;
            font-weight: 800;
            color: #27ae60;
            margin-bottom: 15px;
        }

        .btn-view-product {
            background: linear-gradient(135deg, #3498db 0%, #2980b9 100%);
            border: none;
            border-radius: 10px;
            font-size: 0.95rem;
            font-weight: 600;
            padding: 10px 20px;
            color: white;
            transition: all 0.3s ease;
            width: 100%;
            text-decoration: none;
            display: inline-block;
        }

        .btn-view-product:hover {
            background: linear-gradient(135deg, #2980b9 0%, #1f4e79 100%);
            transform: translateY(-2px);
            color: white;
            text-decoration: none;
        }

        .breadcrumb {
            background: linear-gradient(135deg, #ecf0f1 0%, #bdc3c7 100%);
            border-radius: 15px;
            padding: 15px 25px;
            margin-bottom: 30px;
        }

        .breadcrumb-item+.breadcrumb-item::before {
            content: "→";
            color: #3498db;
            font-weight: bold;
        }

        .quantity-price-section {
            background: white;
            border: 2px solid #3498db;
            border-radius: 12px;
            padding: 20px;
            margin-bottom: 25px;
        }

        .price-quantity-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            margin-bottom: 20px;
        }

        .quantity-controls {
            display: flex;
            align-items: center;
            gap: 5px;
        }

        .quantity-input {
            border: 2px solid #ecf0f1;
            border-radius: 8px;
            font-size: 1.5rem;
            font-weight: 600;
            text-align: center;
            width: 150px;
        }

        .quantity-btn {
            background: #3498db;
            border: none;
            color: white;
            border-radius: 8px;
            padding: 0px 10px;
            font-size: 1.5rem;
            font-weight: 700;
            cursor: pointer;
            transition: all 0.3s ease;
            width: 40px;
            height: 40px;
        }

        .quantity-btn:hover {
            background: #2980b9;
            transform: scale(1.1);
        }

        .button-group {
            display: flex;
            justify-content: center;
            gap: 15px;
            flex-wrap: wrap;
        }

        @media (max-width: 768px) {
            .product-title {
                font-size: 1.8rem;
            }

            .price-quantity-row {
                flex-direction: column;
                gap: 15px;
            }

            .product-price,
            .total-price {
                font-size: 1.5rem;
                padding: 12px 20px;
                min-width: 120px;
            }

            .quantity-input {
                font-size: 1.3rem;
                width: 80px;
                height: 50px;
                padding: 10px;
            }

            .quantity-btn {
                font-size: 1.3rem;
                width: 50px;
                height: 50px;
                padding: 10px 15px;
            }

            .btn-add-to-cart,
            .btn-back {
                width: 100%;
                margin-bottom: 10px;
            }
        }