:after for button text?

Question

css

The Jedi are invited to the question. I need to do this:

Yes, I know that it can all be done this way:

But it's not at all interesting this way. I recently learned how to style a placeholder for inputs

and decided to figure out something similar.

But as always nothing happened.
help
+ what to read / look at css3 advise, so that I would not have such questions?

Answer 1

Since you answered your own question, use :after.