How can I include html and css togheter?

Question

So, I use sublime text 3 to code html and now css. Can anyone explain to me how to use both of them in editor so they work togheter? because I dont really get it.

Answer 1

i hope you understand
https://www.sololearn.com/learn/CSS/1079/

Answer 2

I actually understand it. Thank you very much!