I'm using Bootstrap 4.2 to create a relatively simple grid layout for a list of blog posts in a Wordpress theme.
I have one Card which is double height and I want to 'float' two other single-height cards to the right of it.
Before flex, I'd do this using floats, but now I can't find an answer on how to put two divs stacked to the right of one larger div.
Caveats: I want my boxes to display responsively at 4:3 ratio, so fixed height solutions won't work.
I've looked at A LOT of other pages and answers to similar questions but no-one seems to have found a fix to doing this using flex without specifying a fixed height.
Here's a diagram showing what I want to achieve (on the left) and what's displaying (on the right):