/* All existing CSS styles remain the same */
        /* Adding new styles for category structure */
        
        .quantity-controls {
            display: flex;
            align-items: center;
            margin-top: 10px;
        }
        
        .quantity-btn {
            width: 30px;
            height: 30px;
            border: 1px solid #ddd;
            background-color: #f9f9f9;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
        }
        
        .quantity-btn:hover {
            background-color: #e9e9e9;
        }
        
        .quantity-input {
            width: 40px;
            height: 30px;
            text-align: center;
            border: 1px solid #ddd;
            margin: 0 5px;
        }
        
        .remove-btn {
            background: none;
            border: none;
            color: #e74c3c;
            cursor: pointer;
            margin-left: 10px;
            font-size: 16px;
        }
        
        .remove-btn:hover {
            color: #c0392b;
        }
        
        .cart-item-controls {
            display: flex;
            align-items: center;
            margin-top: 10px;
        }
        
        /* Category toggle styles */
        .main-category {
            margin-bottom: 15px;
        }
        
        .main-category-header {
            display: flex;
            align-items: center;
            cursor: pointer;
            padding: 8px 0;
            font-weight: bold;
            color: #2c3e50;
            border-bottom: 1px solid #eee;
        }
        
        .main-category-header:hover {
            color: #3498db;
        }
        
        .toggle-icon {
            margin-right: 8px;
            transition: transform 0.3s;
        }
        
        .main-category-header.collapsed .toggle-icon {
            transform: rotate(-90deg);
        }
        
        .subcategory-list {
            list-style: none;
            margin-left: 20px;
            margin-top: 8px;
            max-height: 200px;
            overflow: hidden;
            transition: max-height 0.3s ease;
        }
        
        .main-category-header.collapsed + .subcategory-list {
            max-height: 0;
        }
        
        .subcategory-list li {
            margin-bottom: 6px;
        }
        
        .subcategory-list a {
            text-decoration: none;
            color: #555;
            display: block;
            padding: 5px 8px;
            border-radius: 4px;
            transition: background-color 0.3s;
        }
        
        .subcategory-list a:hover {
            background-color: #f0f7ff;
            color: #3498db;
        }
        
        /* All other existing CSS styles remain unchanged */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Arial', sans-serif;
        }

        body {
            background-color: #f5f5f5;
            color: #333;
        }

        /* Header Styles */
        header {
            background: linear-gradient(to right, #2c3e50, #3498db);
            color: white;
            padding: 20px;
            text-align: center;
            font-size: 24px;
            box-shadow: 0 2px 5px rgba(0,0,0,0.1);
        }

        /* Navigation */
        .top-nav {
            display: flex;
            justify-content: space-between;
            padding: 15px 20px;
            background-color: white;
            box-shadow: 0 2px 5px rgba(0,0,0,0.1);
        }

        .top-nav a {
            text-decoration: none;
            color: #333;
            padding: 8px 15px;
            border-radius: 4px;
            transition: background-color 0.3s;
        }

        .top-nav a:hover {
            background-color: #f0f0f0;
        }

        /* Search Section */
        .search-section {
            padding: 20px;
            background-color: white;
            margin: 20px;
            border-radius: 8px;
            box-shadow: 0 2px 5px rgba(0,0,0,0.1);
        }

        .search-box {
            display: flex;
            max-width: 600px;
            margin: 0 auto;
        }

        .search-box input {
            flex: 1;
            padding: 12px;
            border: 1px solid #ddd;
            border-radius: 4px 0 0 4px;
            font-size: 16px;
        }

        .search-box button {
            padding: 12px 20px;
            background-color: #3498db;
            color: white;
            border: none;
            border-radius: 0 4px 4px 0;
            cursor: pointer;
        }

        /* Main Container */
        .main-container {
            display: flex;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* Sidebar */
        .sidebar {
            width: 250px;
            background-color: white;
            border-radius: 8px;
            padding: 20px;
            margin-right: 20px;
            box-shadow: 0 2px 5px rgba(0,0,0,0.1);
        }

        .sidebar h3 {
            margin-bottom: 15px;
            color: #2c3e50;
            border-bottom: 1px solid #eee;
            padding-bottom: 10px;
        }

        .category-section {
            margin-bottom: 20px;
        }

        .category-section h4 {
            margin-bottom: 10px;
            color: #3498db;
            display: flex;
            align-items: center;
        }

        .category-list {
            list-style: none;
            margin-left: 10px;
        }

        .category-list li {
            margin-bottom: 8px;
        }

        .category-list a {
            text-decoration: none;
            color: #555;
            display: block;
            padding: 6px 8px;
            border-radius: 4px;
            transition: background-color 0.3s;
        }

        .category-list a:hover {
            background-color: #f0f7ff;
            color: #3498db;
        }

        /* Products Section */
        .content-area {
            flex: 1;
        }

        .category-header {
            margin-bottom: 20px;
        }

        .category-header h2 {
            color: #2c3e50;
            margin-bottom: 10px;
        }

        .products {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .card {
            background-color: white;
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 2px 5px rgba(0,0,0,0.1);
            transition: transform 0.3s;
            position: relative;
        }

        .card:hover {
            transform: translateY(-5px);
        }

        .card img {
            width: 100%;
            height: 200px;
            object-fit: cover;
        }

        .card-content {
            padding: 15px;
        }

        .card h3 {
            margin-bottom: 10px;
            font-size: 18px;
        }

        .price {
            font-size: 20px;
            font-weight: bold;
            color: #e74c3c;
            margin-bottom: 15px;
        }

        .card-buttons {
            display: flex;
            gap: 10px;
        }

        .btn {
            flex: 1;
            padding: 10px;
            border: none;
            border-radius: 4px;
            cursor: pointer;
            font-weight: bold;
            transition: background-color 0.3s;
        }

        .add-to-cart {
            background-color: #3498db;
            color: white;
        }

        .add-to-cart:hover {
            background-color: #2980b9;
        }

        .buy-now {
            background-color: #2ecc71;
            color: white;
        }

        .buy-now:hover {
            background-color: #27ae60;
        }

        /* Card Touch Options */
        .card-touch-options {
            position: absolute;
            top: 10px;
            right: 10px;
            display: flex;
            gap: 5px;
            opacity: 0;
            transition: opacity 0.3s;
        }

        .card:hover .card-touch-options {
            opacity: 1;
        }

        .touch-btn {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            border: none;
            background-color: white;
            box-shadow: 0 2px 5px rgba(0,0,0,0.2);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            transition: background-color 0.3s;
        }

        .touch-btn:hover {
            background-color: #f0f0f0;
        }

        /* Footer */
        footer {
            background-color: #2c3e50;
            color: white;
            padding: 30px 20px;
            margin-top: 40px;
        }

        .footer-content {
            display: flex;
            justify-content: space-around;
            max-width: 1200px;
            margin: 0 auto;
        }

        .footer-section h4 {
            margin-bottom: 15px;
            font-size: 18px;
        }

        .footer-section ul {
            list-style: none;
        }

        .footer-section li {
            margin-bottom: 8px;
        }

        .footer-section a {
            color: #bdc3c7;
            text-decoration: none;
        }

        .footer-section a:hover {
            color: white;
        }

        .copyright {
            text-align: center;
            margin-top: 20px;
            padding-top: 20px;
            border-top: 1px solid #34495e;
            color: #bdc3c7;
        }

        /* Modal Styles */
        .modal {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0,0,0,0.5);
            z-index: 1000;
            justify-content: center;
            align-items: center;
        }

        .modal-content {
            background-color: white;
            width: 90%;
            max-width: 500px;
            border-radius: 8px;
            padding: 20px;
            box-shadow: 0 4px 8px rgba(0,0,0,0.2);
        }

        .modal-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 1px solid #eee;
        }

        .close-modal {
            background: none;
            border: none;
            font-size: 24px;
            cursor: pointer;
            color: #777;
        }

        /* Cart Modal */
        .cart-items {
            max-height: 300px;
            overflow-y: auto;
            margin-bottom: 20px;
        }

        .cart-item {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 10px 0;
            border-bottom: 1px solid #eee;
        }

        .cart-item-info {
            flex: 1;
        }

        .cart-item-name {
            font-weight: bold;
        }

        .cart-item-price {
            color: #e74c3c;
        }

        .cart-total {
            display: flex;
            justify-content: space-between;
            font-size: 18px;
            font-weight: bold;
            margin-bottom: 20px;
            padding-top: 10px;
            border-top: 1px solid #eee;
        }

        .checkout-btn {
            width: 100%;
            padding: 12px;
            background-color: #2ecc71;
            color: white;
            border: none;
            border-radius: 4px;
            font-size: 16px;
            font-weight: bold;
            cursor: pointer;
        }

        .checkout-btn:hover {
            background-color: #27ae60;
        }

        /* Customer Details Modal Styles */
.customer-details {
    margin-bottom: 20px;
}

.customer-details textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 16px;
    resize: vertical;
    min-height: 80px;
    font-family: inherit;
}

.customer-details textarea:focus {
    border-color: #3498db;
    outline: none;
    box-shadow: 0 0 5px rgba(52, 152, 219, 0.3);
}

.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
    color: #2c3e50;
}

.form-group input {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 16px;
    transition: border-color 0.3s;
}

.form-group input:focus {
    border-color: #3498db;
    outline: none;
    box-shadow: 0 0 5px rgba(52, 152, 219, 0.3);
}

        /* Payment Modal */
        .payment-methods {
            margin-bottom: 20px;
        }

        .payment-method {
            display: flex;
            align-items: center;
            margin-bottom: 10px;
            padding: 10px;
            border: 1px solid #ddd;
            border-radius: 4px;
            cursor: pointer;
            transition: background-color 0.3s;
        }

        .payment-method:hover {
            background-color: #f9f9f9;
        }

        .payment-method.selected {
            background-color: #f0f7ff;
            border-color: #3498db;
        }

        .payment-method input {
            margin-right: 10px;
        }

        .payment-details {
            margin-top: 20px;
            display: none;
        }

        .payment-details.active {
            display: block;
        }

        .form-group {
            margin-bottom: 15px;
        }

        .form-group label {
            display: block;
            margin-bottom: 5px;
            font-weight: bold;
        }

        .form-group input {
            width: 100%;
            padding: 10px;
            border: 1px solid #ddd;
            border-radius: 4px;
            font-size: 16px;
        }

        .payment-footer {
            display: flex;
            justify-content: space-between;
            margin-top: 20px;
        }

        .back-btn {
            padding: 10px 20px;
            background-color: #95a5a6;
            color: white;
            border: none;
            border-radius: 4px;
            cursor: pointer;
        }

        .pay-btn {
            padding: 10px 20px;
            background-color: #2ecc71;
            color: white;
            border: none;
            border-radius: 4px;
            cursor: pointer;
        }

        /* Success Message */
        .success-message {
            position: fixed;
            top: 20px;
            right: 20px;
            background-color: #2ecc71;
            color: white;
            padding: 15px 20px;
            border-radius: 4px;
            box-shadow: 0 2px 5px rgba(0,0,0,0.2);
            display: none;
            z-index: 1001;
        }

        /* Order Success Modal */
        .order-success {
            text-align: center;
            padding: 20px;
        }

        .order-success-icon {
            font-size: 48px;
            color: #2ecc71;
            margin-bottom: 15px;
        }

        /* Responsive Design */
        @media (max-width: 992px) {
            .products {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .main-container {
                flex-direction: column;
            }
            
            .sidebar {
                width: 100%;
                margin-right: 0;
                margin-bottom: 20px;
            }
            
            .products {
                grid-template-columns: 1fr;
            }
            
            .footer-content {
                flex-direction: column;
                gap: 20px;
            }
        }