Css Questions

[JenL]

Which CSS file and what line do I have to modify in order to

 

1) Change the color & font of the navigationbar that holds the Contact uss, language and sign in links ?

 

2) Change the color & font/font size of the top menu ? Submenues included ?

 

3) Change the color & font/font size of the categories header ?

 

4) Change the backgroundcolor of the search ikon in the quick search bar ?

 

5) Change the backgroundcolor of the check-out ?

 

6) Change the backgroundcolor of the footer and the social media links ?

 

Thanks.