:root {
            --background-color: #ffffff;
            --default-color: #444444;
            --heading-color: #273d4e;
            --accent-color: #ff4a17;
            --surface-color: #ffffff;
            --contrast-color: #ffffff;
            --secondary-yellow: #f6c700;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: 'Open Sans', sans-serif;
            color: var(--default-color);
            background-color: var(--background-color);
            line-height: 1.6;
        }

        /* Header */
        .header {
            background: var(--surface-color);
            padding: 1rem 0;
            box-shadow: 0 2px 8px rgba(34,34,34,0.08);
            position: sticky;
            top: 0;
            z-index: 100;
        }

        .header-container {
            max-width: 1440px;
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .logo {
            font-family: 'Montserrat', sans-serif;
            font-weight: 700;
            font-size: 24px;
            color: var(--accent-color);
            text-transform: uppercase;
            letter-spacing: 0.05em;
            text-decoration: none;
        }

        .nav {
            display: flex;
            gap: 2rem;
            align-items: center;
        }

        .nav a {
            color: var(--heading-color);
            text-decoration: none;
            font-weight: 600;
            transition: color 0.3s ease;
        }

        .nav a:hover {
            color: var(--accent-color);
        }

        .cart-icon {
            position: relative;
            background: var(--accent-color);
            color: var(--contrast-color);
            padding: 8px 12px;
            border-radius: 6px;
            font-weight: 600;
            text-decoration: none;
        }

        /* Main Container */
        .main-container {
            max-width: 1440px;
            margin: 0 auto;
            padding: 48px 24px;
            display: grid;
            grid-template-columns: 2fr 1fr;
            gap: 48px;
            min-height: calc(100vh - 200px);
        }

        /* Cart Section */
        .cart-section {
            background: var(--surface-color);
            border-radius: 8px;
            box-shadow: 0 2px 8px rgba(34,34,34,0.08);
            padding: 32px;
            height: fit-content;
        }

        .section-title {
            font-family: 'Montserrat', sans-serif;
            font-weight: 700;
            font-size: 32px;
            color: var(--heading-color);
            margin-bottom: 32px;
            letter-spacing: 0.01em;
        }

        .cart-items {
            display: flex;
            flex-direction: column;
            gap: 24px;
        }

        .cart-item {
            display: grid;
            grid-template-columns: 120px 1fr auto auto auto;
            gap: 24px;
            align-items: center;
            padding: 24px;
            border: 1px solid #e0e0e0;
            border-radius: 8px;
            background: var(--surface-color);
            transition: transform 0.2s ease, box-shadow 0.2s ease;
        }

        .cart-item:hover {
            transform: translateY(-2px);
            box-shadow: 0 4px 16px rgba(34,34,34,0.10);
        }

        .item-image {
            width: 120px;
            height: 120px;
            object-fit: cover;
            border-radius: 8px;
            background: #f5f5f5;
        }

        .item-details h3 {
            font-family: 'Montserrat', sans-serif;
            font-weight: 600;
            font-size: 18px;
            color: var(--heading-color);
            margin-bottom: 8px;
        }

        .item-details .category {
            color: var(--default-color);
            font-size: 14px;
            margin-bottom: 8px;
        }

        .item-details .stock {
            color: #16a34a;
            font-size: 14px;
            font-weight: 600;
        }

        .quantity-controls {
            display: flex;
            align-items: center;
            gap: 12px;
            background: #f5f5f5;
            border-radius: 6px;
            padding: 8px;
        }

        .qty-btn {
            background: var(--accent-color);
            color: var(--contrast-color);
            border: none;
            width: 32px;
            height: 32px;
            border-radius: 4px;
            cursor: pointer;
            font-weight: 600;
            transition: background 0.3s ease;
        }

        .qty-btn:hover {
            background: #e03f12;
        }

        .qty-btn:disabled {
            background: #ccc;
            cursor: not-allowed;
        }

        .quantity {
            font-weight: 600;
            font-size: 16px;
            min-width: 30px;
            text-align: center;
        }

        .item-price {
            font-family: 'Montserrat', sans-serif;
            font-weight: 700;
            font-size: 18px;
            color: var(--heading-color);
        }

        .remove-btn {
            background: none;
            border: none;
            color: var(--accent-color);
            cursor: pointer;
            font-size: 24px;
            padding: 8px;
            border-radius: 4px;
            transition: background 0.3s ease;
        }

        .remove-btn:hover {
            background: #fef2f2;
        }

        .empty-cart {
            text-align: center;
            padding: 64px 32px;
            color: var(--default-color);
        }

        .empty-cart h3 {
            font-family: 'Montserrat', sans-serif;
            color: var(--heading-color);
            font-size: 24px;
            margin-bottom: 16px;
        }

        /* Summary Section */
        .summary-section {
            background: var(--surface-color);
            border-radius: 8px;
            box-shadow: 0 2px 8px rgba(34,34,34,0.08);
            padding: 32px;
            height: fit-content;
            position: sticky;
            top: 120px;
        }

        .summary-row {
            display: flex;
            justify-content: space-between;
            margin-bottom: 16px;
            padding-bottom: 8px;
        }

        .summary-row.total {
            border-top: 2px solid #e0e0e0;
            padding-top: 16px;
            font-family: 'Montserrat', sans-serif;
            font-weight: 700;
            font-size: 20px;
            color: var(--heading-color);
        }

        .btn-primary {
            background: var(--accent-color);
            color: var(--contrast-color);
            border: none;
            padding: 16px 32px;
            border-radius: 6px;
            font-family: 'Montserrat', sans-serif;
            font-weight: 700;
            font-size: 18px;
            cursor: pointer;
            width: 100%;
            margin-top: 24px;
            transition: background 0.3s ease;
            letter-spacing: 0.05em;
            text-transform: uppercase;
        }

        .btn-primary:hover {
            background: #e03f12;
        }

        .btn-primary:disabled {
            background: #ccc;
            cursor: not-allowed;
        }

        .btn-secondary {
            background: var(--contrast-color);
            color: var(--accent-color);
            border: 2px solid var(--accent-color);
            padding: 14px 32px;
            border-radius: 6px;
            font-family: 'Montserrat', sans-serif;
            font-weight: 700;
            font-size: 16px;
            cursor: pointer;
            width: 100%;
            margin-top: 16px;
            transition: background 0.3s ease;
            text-decoration: none;
            text-align: center;
            display: inline-block;
        }

        .btn-secondary:hover {
            background: #f5f5f5;
        }

        .coupon-section {
            margin: 24px 0;
            padding: 24px;
            background: #f9f9f9;
            border-radius: 8px;
        }

        .coupon-input {
            display: flex;
            gap: 12px;
            margin-top: 12px;
        }

        .coupon-input input {
            flex: 1;
            padding: 12px 16px;
            border: 1px solid #d1d5db;
            border-radius: 6px;
            font-family: 'Open Sans', sans-serif;
            font-size: 16px;
        }

        .coupon-input button {
            background: var(--heading-color);
            color: var(--contrast-color);
            border: none;
            padding: 12px 24px;
            border-radius: 6px;
            font-weight: 600;
            cursor: pointer;
        }

        /* Responsive Design */
        @media (max-width: 1199px) {
            .main-container {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            
            .summary-section {
                position: static;
            }
        }

        @media (max-width: 768px) {
            .header-container {
                padding: 0 16px;
            }
            
            .nav {
                gap: 1rem;
            }
            
            .main-container {
                padding: 24px 16px;
            }
            
            .cart-item {
                grid-template-columns: 80px 1fr;
                grid-template-rows: auto auto auto;
                gap: 16px;
            }
            
            .cart-item .item-image {
                width: 80px;
                height: 80px;
                grid-row: span 2;
            }
            
            .cart-item .item-details {
                grid-column: 2;
            }
            
            .cart-item .quantity-controls,
            .cart-item .item-price,
            .cart-item .remove-btn {
                grid-column: span 2;
                justify-self: start;
            }
            
            .section-title {
                font-size: 24px;
            }
        }

        .notification {
            position: fixed;
            top: 100px;
            right: 24px;
            background: #16a34a;
            color: white;
            padding: 16px 24px;
            border-radius: 8px;
            box-shadow: 0 4px 16px rgba(34,34,34,0.15);
            transform: translateX(400px);
            transition: transform 0.3s ease;
            z-index: 1000;
        }

        .notification.show {
            transform: translateX(0);
        }