Interaction appear on click

[Lijn-B]

I had a (sort of) same question lately:

Relative styling with of 2 components

I’m trying to create 2 equal columns (with the culmn block or with to divs). When I hover over the left one, I want it to be 66% width and at the same time the right one has to shrink to 33%. With a div and relative styling using the pseudo-class :hover I can set the size of the div I hover. Is it possible to set the other div to another width while hovering the first one? And how can I create it?

Maybe this helps too