Different Font for Site Title/Name

Hi, Just bought your great theme and currently setting things up for this site: http://publiks.net/mypubliks/

I prefer to use Site Title in place of Logo. How can I adjust the font-family and font-size of the SIte Title to be different (Cinzel Decorative) from the menu’s (which is perfectly set as Josefin Sans, 13px)? Let me know the specific custom CSS to try and where to place it (Theme Options, General Setttings?)

Many thanks,

Alvan