Twenty twelve container gone?

Hello all,

I have been messing around with the background etc of a child theme of twenty twelve called restaurant.
This usually has a white container in the middle and now it suddenly is gone.. im not sure what i have done to make this happen or how i can get this back. I have been experimenting with the background image and colours if it matters.
Please help me!!

my site:
https://www.bungaindah.nl