Add a theme to every parent taxonomy term through CSS

Hello,

1. I am not a programmer.
2. I would like to apply a css class on every parent taxonomy-term and i (optionally) want that its children inherit this class.
Can this be achieved through this module? If yes, can you give me a concrete example in how to accomplish this?
I found a way of styling here. This is done through css. I want something similar.
Thank you!