title: How to stack items above each other with flex box?
body: <p>So I just googled a lot and was not able to find a solution for this. I want 2 items to be centered horizontally and vertically. The trick here is that I want to stack them above each other, no problem with position:absolute, but I can't center the elements with an absolute position. I think that this should work anyhow with flexbox. With stacking I mean so that one element is hiding the other partially.</p>
  
  <p><a href="https://i.stack.imgur.com/2Ks4D.png" rel="noreferrer"><img src="https://i.stack.imgur.com/2Ks4D.png" alt="enter image description here"></a></p>