CSS inner id selectors

Question

I\'ve got below id selectors in a CSS file. Headerphoto and logo-box are inner id-selectors of header id. Do I really need to add those two as inner id-selectors? I can add them

Answer 1

you don't have to add the #header selector, but i've heard the page rendering is faster the more precise the selector was declared. In my opinion it doesn't matter.