I am so confused because css code without using html its possible or not ?? What diffrence

Question

https://code.sololearn.com/W4ZNOndIrYJb/?ref=app
https://code.sololearn.com/WYVVt9QVRHpo/?ref=app

Answer 1

CSS allows you to set and store your "styleguide" to later apply it to whole HTML elements (whether block or inline) by just naming them (by id or class) adequately.

Answer 2

CSS just decorates the html