:root {
        --brand-primary: #0056b3; 
        --brand-accent: #004494;  
        --text-dark: #282828;
        --text-muted: #75757a;
        --border-color: #e0e0e0;
        --bg-body: #f1f1f2;
    }

    body { background-color: var(--bg-body); color: var(--text-dark); }

    /* Layout Adjustments */
    .cart-container { max-width: 1150px; }
    
    /* Section Headers */
    .section-title { font-size: 1.25rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.5px; }

    /* Cart Card Styling */
    .cart-card {
        background: #fff;
        border-radius: 4px;
        border: none;
        box-shadow: 0 2px 5px 0 rgba(0,0,0,0.05);
    }

    .cart-item {
        padding: 1rem;
        border-bottom: 1px solid var(--border-color);
        transition: background 0.2s;
    }
    .cart-item:last-child { border-bottom: none; }
    
    .item-img {
        width: 80px; height: 80px;
        object-fit: contain;
        border-radius: 4px;
    }

    .item-name { font-size: 0.95rem; font-weight: 400; color: var(--text-dark); display: block; text-decoration: none; }
    .item-name:hover { color: var(--brand-primary); }

    .brand-tag { font-size: 0.75rem; color: var(--text-muted); text-transform: uppercase; }

    /* Price Styling */
    .current-price { font-size: 1.15rem; font-weight: 700; display: block; }
    .old-price { font-size: 0.85rem; color: var(--text-muted); text-decoration: line-through; }
    .discount-pill {
        font-size: 0.75rem;
        background: #e7f0f7;
        color: var(--brand-primary);
        padding: 2px 6px;
        border-radius: 2px;
        font-weight: 600;
    }

    /* Professional QTY Control */
    .qty-box {
        display: flex;
        align-items: center;
        border: 1px solid var(--border-color);
        border-radius: 4px;
        width: fit-content;
        height: 32px;
    }
    .qty-btn {
        background: none; border: none;
        width: 30px; color: var(--brand-primary);
        font-weight: bold; font-size: 1.2rem;
        line-height: 1;
    }
    .qty-input {
        width: 35px; border: none; text-align: center;
        font-size: 0.9rem; font-weight: 600; background: transparent;
    }

    /* Sidebar - Sticky Removed */
    .summary-sidebar {
        z-index: 5;
    }

    .summary-label { font-size: 0.9rem; color: var(--text-muted); }
    .summary-value { font-size: 1rem; font-weight: 600; }

    /* CTA Buttons */
    .btn-checkout {
        background-color: var(--brand-primary);
        color: #fff;
        border: none;
        font-weight: 700;
        text-transform: uppercase;
        padding: 12px;
        font-size: 0.95rem;
        border-radius: 4px;
        box-shadow: 0 4px 8px 0 rgba(0,0,0,0.1);
    }
    .btn-checkout:hover { background-color: var(--brand-accent); color: #fff; transform: translateY(-1px); }

    .promo-input {
        border-radius: 4px 0 0 4px !important;
        font-size: 0.85rem;
        border: 1px solid var(--border-color);
    }
    .promo-btn {
        border-radius: 0 4px 4px 0 !important;
        font-size: 0.8rem;
        font-weight: 700;
        border: 1px solid var(--brand-primary);
        background: #fff;
        color: var(--brand-primary);
    }

    .remove-link {
        font-size: 0.8rem;
        color: var(--brand-primary);
        text-decoration: none;
        text-transform: uppercase;
        font-weight: 600;
    }

    /* Form Styles */
    .form-label { font-size: 0.85rem; font-weight: 600; color: var(--text-dark); margin-bottom: 4px; }
    .form-control-sm { border-radius: 4px; border: 1px solid var(--border-color); padding: 8px 12px; font-size: 0.9rem; }
    .form-control-sm:focus { border-color: var(--brand-primary); box-shadow: none; }
    
    .payment-icon-list { display: flex; gap: 10px; justify-content: center; align-items: center; margin-top: 10px; }
    .payment-icon-list img { height: 45px; opacity: 0.8; }