Why is my stylesheet not working in this code?

Question

I know this is a simple basic code but wanted to post something to solo learn so here is my first code.
https://code.sololearn.com/W71tsYErQBE6/#js

Answer 1

But I can see the output ^_^

Answer 2

It's working fine for me too.

Answer 3

yes the code does work. I am not seeing the font-family I have added to the code.