Dashboard tile layout with different widths

I know there are quite numerous threads already, but obviously I am too stupid to adapt their solutions for my probplem.
In case I just overread something it would be nice to point me there.

What I want to do is to create a layout with a four column division in general.
It is meant for my lights page.
So for four buttons in a row plus markdown cards on top for the rooms or for the floor.
As long as the markdown cards are to span over all four columns or over two and two everything is easy.
Trouble starts when I want to have two markdown cards in one row, one being three columns wide and the other one being one column wide.
I will add a screenshot to visualize.
I managed at least something but then there is a indent gap and a 75%/25% division doesn’t give exactly what I want.
So I am grateful for any help.

Thread can be closed I found a solution.
I now use the code which gave the odd indent for all the cards.
I may now loose a few pixels over all cards on the page but therefore I can split them up as I want to.