seo – Website cache on google looks wrong

I see similar topics about this issue but nothing solve my problem, so I’m still struggling with it.

Below the link to Google cache:

http://webcache.googleusercontent.com/search?q=cache%3Ahttps%3A%2F%2Fwww.bomboniere-online.it%2Fbomboniere-matrimonio&oq=cache%3Ahttps%3A%2F%2Fwww.bomboniere-online.it%2Fbomboniere-matrimonio&aqs=chrome.0.69i59j69i58j69i60l2.1463j0j4&sourceid=chrome&ie=UTF-8

Seems that Google cannot read css. I’m using full path, server css cache and css minimizing (compress more css file in a single one). Without css compress the result is the same.

Thanks in advance