Css html issue about .red-text

HTML-CSS
1

Tell us what’s happening:

Hi everyone, I’m new here just started. I am stuck on this piece of code. Anyone with suggestions?
Thanx in advance
Your code so far

<style>
  .red-text {
    color: red;
}
</style>

<h2 class= "red-text" >CatPhotoApp</h2>

Your browser information:

Your Browser User Agent is: Mozilla/5.0 (Linux; Android 7.0; SM-A520F Build/NRD90M) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/66.0.3359.158 Mobile Safari/537.36.

Link to the challenge:
https://www.freecodecamp.org/challenges/use-a-css-class-to-style-an-element

3

Thanx for answer me! I read in other posts it may be cause I am using my mobile phone instead of my laptop?
Thx in advance.