Thanks for the quick reply, I also have custom fields included, so 2. shouldn’t be the issue. I guess the default CSS may have changed since then.
I created a theme component and added some CSS for the desktop and managed to get it to work (after only a few hours 
) and it looks more or less the way I want it (see screenshot).
I might share the code at a later point after cleaning it up and understanding which parts I actually need and how to align things properly.