I'll try to set a fix value to the height of an outer flexbox item in a nested solution with no luck.
Trying height, fixed-height, max-height on both flex-container and flex-item.
To demonstrate I have create a codepen:
Optimal all the cards should be 400px or 80% or evt. windows.height - 100px. (optional).
I tried also a couple of other questions/answers in that direction, for e.g.
but in none of them I found the fitting solution.
I hope it's just a simple attribute at the right place to solve it.
If something is unclear, or need more description, let me know in what direction I should enhance the question.