Brother, this is because of your over-smartness.
Did you ever thought why pro-bloggers like Mohammad keep large scripts and css like Font Awesome, jquery and some more in external scripts? Even they know that these scripts (external) increase loading time?
Its just because they know that if we add that scripts in our template, we get ‘Prioritize visible content’ issue which will help our Pagespeed score.
##How to fix this issue?
Now, in notepad, just write them as:
Then, you can use them as:
// FOR CSS
And after it, check that issue (Prioritize visible content). You will see that the issue is vanished!
Inform me if it worked.