How to position 2 divs side by side

Hello,

In my application, I am printing a razor page and I want to display 2 divs side by side. (Contact and Delivery Information) I want the grid to start from the left and closer to the others.

Here is my sample razor:

@page "/dialogcard/{Order}"
@using IMS.CoreBusiness
@using IMS.UseCases.Interfaces.OrderDetail
@inject IViewOrderDetailsByOrderIdUseCase ViewOrderDetailsByOrderIdUseCase
@inject DialogService DialogService
@inject IJSRuntime JsRuntime


@if (orderDetails != null)
{
    

        


            
                

                    Order @Order.OrderId Details
                
                
                    

                        @{
                            var detailVendorId = 0;
                        }
                        @foreach (var detail in orderDetails)
                        {
                            @if (detailVendorId != detail.VendorId)
                            {
                                
                                    

                                        

                                            

                                                
                                                    
Contact
                                                    

                                                        

                                                            
Responsible
                                                            @detail.Vendor.MainResponsibleName
                                                            
Company
                                                            @Order?.CustomerName
                                                        
                                                    
                                                
                                            
                                            

                                                
                                                    
Delivery Information
                                                    

                                                        

                                                            
Address
                                                            @(detail?.ShippingNumber), @(detail?.TrackingNumber)
                                                            
Vendor
                                                            @detail?.Vendor.Name
                                                        
                                                    
                                                
                                            
                                        
                                    

                                    

                                        

                                             x.VendorId == detail.VendorId).Select(x => x.TotalBuyPrice).Sum())}") style="margin-bottom: 5px"/>
                                        
                                        
                                            
                                                
                                                
                                                
                                                
                                                
                                                
                                                

                                            
                                        
                                    
                                
                            }
                            detailVendorId = detail.VendorId;
                        }

                    
                
            
        

    
}



    

        
        
        @*Print*@
    


@code {
    [Parameter] public ReportViewModel Order { get; set; }
    IEnumerable orderDetails;

    protected override async Task OnInitializedAsync()
    {
        orderDetails = await ViewOrderDetailsByOrderIdUseCase.ExecuteAsync(Order.OrderId);
        
    }
    private void PrintDocument()
    {
        JsRuntime.InvokeVoidAsync("print");
    }
}

And here is my related CSS:

@media print {
    body * {
        visibility: hidden;
    }
    #printarea, #printarea1, #printarea *, #printarea1 * {
        visibility: visible;
    }
    #printarea {
        position: absolute;
        left: 0;
        top: 0;
        
    }
    #printarea1 {
        position: fixed;
        left: 0;
        top: 0;
    }
    @page {
        size: A4 landscape;
    }
    .float-child {
        width: 50%;
        float: left;
        /*padding: 20px;*/
        
    }

And the result which is not even close what I want: