Why doesn't anything show up in the block beside the code editor?

Tell us what’s happening:
It said I passed the challenge but nothing visual shows up in the box to the right. Why?

Your code so far


<style>
  div:hover { 
    transform: scale(1.1);
    width: 70%;
    height: 100px;
    margin:  50px auto;
    background: linear-gradient(
      53deg,
      #ccfffc,
      #ffcccf
    );
   
  }
  
  
  
</style>

<div></div>

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.131 Safari/537.36.

Link to the challenge:
https://learn.freecodecamp.org/responsive-web-design/applied-visual-design/use-the-css-transform-scale-property-to-scale-an-element-on-hover

So you were supposed to add/create a div:hover rule, not modify the existing div rule that was there.