I have this situation:
In the left I have a tree with my companies and in the right a DIV with div which I will draw my matCard (angular material).
I would like that MyCard div can fill all with margin of 30px.
If I set two matCards second one will be under MyCard with 30px of margin between them.
How can I do it using CSS? to fill MyCArd to all myMainDi vwith 30px of margin. If I change width length that card change the with automatically.Thx