title: How to place an img behind a card and make it responsive
body: <h2>I would like to put an image behind a card and make it responsive</h2>
  <p>Quite useless to share my code because i really don't know where to go with this problem.<br>
  I already tried to put the img in a <code>:after</code> or <code>:before</code> but i could't manage to make it not break the <code>display:flex</code> of the card container, i tried to put it in the card using <code>z-index</code> but it creates a blank space before the text.<br>
  So i tried to schematize what i would like to do, <strong>thanks a lot!</strong> :) <br><br><br>
  <a href="https://i.stack.imgur.com/DYf5D.png" rel="nofollow noreferrer">Ugly drawing of what i want :D </a></p>