How do I overlap div elements

Question

How?

Answer 1

div {
position: absolute;
top: 0;
left: 0;
}

Answer 2

Overlapping poker cards

https://code.sololearn.com/WbddE1j2hdBm/?ref=app

Answer 3

I want to know, too. I suck at CSS.

Answer 4

z-index for the win!