css errors for

Acedemy

Hi, I have testing page in here

sablonlar.camart.us/

when I check css file from here
jigsaw.w3.org/css-validator/validator?ur...vextwarning=&lang=el

(you can translate whith google translate that)
there are 51 error
how can we fix that?

That is normal. We sometimes use magic that is not by w3 standards to make things look similar on different browsers.