How to reuse styles?

Question

Back in the past I learned a lot about CSS but now I can\'t remember how to reuse styles.

Example:

I have some tabs with class tab and I can switch

Answer 1

This selector inheritance is a nice feature of SASS.

If you want to stick with plain CSS, look at the section on Selector Inheritance and you can see how the SASS code, with the @extend, is turned into regular CSS.