Container with one side full width image / paragraph with maxwidth


I want to have one side full-width image and on other side, I want to set textfield into container width. At the moment I set padding-left: 30%. But I am not satisfied.
What is the best way to do it?

Red rectangle is container width.

Here is my site Read-Only: LINK

Don’t use a container. Use a div. I’d recommend using a wrapper with 2 divs inside with the outer wrapper set to flex or grid with side by side 50%. Then you can apply a background image set to cover to the right div. Hope that helps!