:root {
        --primary-color: #0f3460;
        --secondary-color: #e94560;
        --success-color: #28a745;
        --border-color: #e5e7eb;
        --bg-color: #f8f9fa;
        --text-dark: #1f2937;
        --text-light: #6b7280;
    }

    .checkout-section {
        background-color: var(--bg-color);
        padding: 60px 0;
        font-family: 'Poppins', sans-serif;
    }

    /* --- Card Design --- */
    .checkout-card {
        background: #ffffff;
        border: 1px solid var(--border-color);
        border-radius: 12px;
        box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
        margin-bottom: 24px;
        overflow: hidden;
    }

    .checkout-header {
        background: #fff;
        padding: 20px 24px;
        border-bottom: 1px solid var(--border-color);
        display: flex;
        align-items: center;
        gap: 12px;
    }
    .checkout-header i {
        color: var(--secondary-color);
        font-size: 22px;
    }
    .checkout-header h6 {
        margin: 0;
        font-size: 18px;
        font-weight: 700;
        color: var(--primary-color);
        text-transform: uppercase;
        letter-spacing: 0.5px;
    }

    .card-body-custom {
        padding: 30px;
    }

    /* --- Form Inputs --- */
    .form-group { margin-bottom: 20px; }
    .form-label-custom {
        font-size: 14px;
        font-weight: 600;
        color: var(--text-dark);
        margin-bottom: 8px;
        display: block;
    }
    .form-control-custom {
        width: 100%;
        height: 50px;
        border: 1px solid #d1d5db;
        border-radius: 8px;
        padding: 0 16px;
        font-size: 15px;
        color: #333;
        transition: all 0.2s;
        background-color: #fff;
    }
    .form-control-custom:focus {
        border-color: var(--primary-color);
        box-shadow: 0 0 0 4px rgba(15, 52, 96, 0.08);
        outline: none;
    }
    textarea.form-control-custom {
        height: auto;
        padding: 15px;
        line-height: 1.5;
    }

    /* --- Payment Methods (Interactive Box) --- */
    .payment-option-label {
        display: flex;
        align-items: center;
        justify-content: space-between;
        border: 2px solid var(--border-color);
        border-radius: 10px;
        padding: 16px;
        cursor: pointer;
        transition: all 0.2s ease;
        margin-bottom: 15px;
        background: #fff;
        position: relative;
    }
    .payment-option-label:hover {
        border-color: #9ca3af;
        background: #f9fafb;
    }
    .payment-option-label input {
        position: absolute;
        opacity: 0;
        cursor: pointer;
    }
    /* Selected State */
    .payment-option-label:has(input:checked) {
        border-color: var(--primary-color);
        background-color: #f0f5ff;
        box-shadow: 0 0 0 1px var(--primary-color);
    }
    .payment-content {
        display: flex;
        align-items: center;
        gap: 15px;
        width: 100%;
    }
    .pay-logo {
        width: 40px;
        height: 40px;
        object-fit: contain;
    }
    .pay-info strong {
        display: block;
        font-size: 16px;
        color: var(--text-dark);
    }
    .pay-info small {
        font-size: 13px;
        color: var(--text-light);
    }
    .check-circle {
        width: 22px;
        height: 22px;
        border: 2px solid #ccc;
        border-radius: 50%;
        position: relative;
        flex-shrink: 0;
    }
    .payment-option-label input:checked ~ .check-circle {
        border-color: var(--primary-color);
        background: var(--primary-color);
    }
    .payment-option-label input:checked ~ .check-circle::after {
        content: '';
        position: absolute;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
        width: 8px;
        height: 8px;
        background: #fff;
        border-radius: 50%;
    }

    /* --- Cart Items (Scrollable) --- */
    .sticky-sidebar {
        position: sticky;
        top: 100px;
    }
    .cart-items-scroll {
        max-height: 400px;
        overflow-y: auto;
        padding-right: 5px;
    }
    .cart-items-scroll::-webkit-scrollbar { width: 5px; }
    .cart-items-scroll::-webkit-scrollbar-track { background: #f1f1f1; }
    .cart-items-scroll::-webkit-scrollbar-thumb { background: #ccc; border-radius: 5px; }

    .checkout-item {
        display: flex;
        gap: 15px;
        padding: 15px 0;
        border-bottom: 1px dashed var(--border-color);
        position: relative;
        align-items: center;
    }
    .checkout-item:last-child { border-bottom: none; }

    .checkout-pro-img {
        width: 70px;
        height: 70px;
        border-radius: 8px;
        border: 1px solid #eee;
        object-fit: cover;
    }
    .checkout-pro-info h6 {
        font-size: 15px;
        font-weight: 600;
        color: var(--text-dark);
        margin: 0 0 5px;
        line-height: 1.4;
    }
    .checkout-pro-info .meta {
        font-size: 12px;
        color: var(--text-light);
    }
    .remove-item-btn {
        color: #ef4444;
        cursor: pointer;
        font-size: 16px;
        position: absolute;
        top: 15px;
        right: 0;
        transition: 0.2s;
    }
    .remove-item-btn:hover { color: #dc2626; transform: scale(1.1); }

    /* Quantity Control */
    .qty-box {
        display: flex;
        align-items: center;
        background: #f3f4f6;
        border-radius: 6px;
        padding: 3px;
        margin-top: 8px;
        width: fit-content;
    }
    .qty-btn {
        width: 28px;
        height: 28px;
        border: none;
        background: #fff;
        border-radius: 4px;
        color: var(--primary-color);
        font-weight: bold;
        cursor: pointer;
        box-shadow: 0 1px 2px rgba(0,0,0,0.05);
        display: flex;
        align-items: center;
        justify-content: center;
    }
    .qty-btn:hover { background: var(--primary-color); color: #fff; }
    .qty-val {
        width: 30px;
        text-align: center;
        font-size: 14px;
        font-weight: 600;
    }

    /* --- COUPON BOX (LARGER & MODERN) --- */
    .coupon-wrapper {
        background: #f8fafc;
        padding: 20px;
        border-top: 1px solid var(--border-color);
        border-bottom: 1px solid var(--border-color);
    }
    .coupon-group-modern {
        display: flex;
        width: 100%;
        height: 55px; /* Bigger Height */
        border: 2px solid #d1d5db;
        border-radius: 8px;
        overflow: hidden;
        transition: 0.3s;
        background: #fff;
    }
    .coupon-group-modern:focus-within {
        border-color: var(--primary-color);
        box-shadow: 0 0 0 4px rgba(15, 52, 96, 0.05);
    }
    .coupon-input-modern {
        flex-grow: 1;
        border: none;
        padding: 0 20px;
        font-size: 15px;
        color: #333;
        outline: none;
    }
    .coupon-btn-modern {
        background: var(--text-dark);
        color: #fff;
        border: none;
        padding: 0 30px;
        font-weight: 700;
        font-size: 14px;
        text-transform: uppercase;
        cursor: pointer;
        transition: 0.3s;
    }
    .coupon-btn-modern:hover {
        background: var(--secondary-color);
    }

    /* --- Totals Area --- */
    .summary-totals {
        padding: 24px;
        background: #fff;
    }
    .total-row {
        display: flex;
        justify-content: space-between;
        margin-bottom: 12px;
        font-size: 15px;
        color: var(--text-dark);
    }
    .total-row.final {
        border-top: 2px dashed #e5e7eb;
        margin-top: 15px;
        padding-top: 15px;
        font-size: 20px;
        font-weight: 800;
        color: var(--primary-color);
    }

    /* Advance/Due Alert */
    .advance-alert {
        background: #f0fdf4;
        border: 1px solid #bbf7d0;
        border-radius: 8px;
        padding: 15px;
        margin-top: 15px;
        text-align: center;
    }

    /* --- Submit Button --- */
    .btn-place-order {
        background: var(--secondary-color);
        color: #fff;
        width: 100%;
        border: none;
        padding: 18px;
        border-radius: 10px;
        font-size: 17px;
        font-weight: 700;
        text-transform: uppercase;
        letter-spacing: 1px;
        transition: 0.3s;
        box-shadow: 0 10px 25px rgba(233, 69, 96, 0.3);
        cursor: pointer;
        display: flex;
        justify-content: center;
        align-items: center;
        gap: 10px;
    }
    .btn-place-order:hover {
        background: var(--primary-color);
        transform: translateY(-2px);
    }

    /* --- Responsive Fixes --- */
    @media (max-width: 991px) {
        .cus-order-2 { order: 2; }
        .cust-order-1 { order: 1; margin-bottom: 30px; }
        .mobile-submit-btn { display: block !important; margin-top: 25px; }
        .desktop-submit-btn { display: none !important; }
    }
    @media (min-width: 992px) {
        .mobile-submit-btn { display: none !important; }
        .desktop-submit-btn { display: block !important; }
    }