Challenge Use CSS Selectors to Style Elements has an issue.
User Agent is: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:50.0) Gecko/20100101 Firefox/50.0.
Please describe how to reproduce this issue, and include links to screenshots if possible.

My code:

<style>
  h2 {color: blue;}
</style>  
  
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