ID help

Hello

I want to remove the ‘white’ from my site. Please take a look at this image: https://share.xboxlife.dk/file/ztiwotg2zgqymja3mwiyyzu3ztaxmdaynjkymgu2m2m.jpg

I can’t find the id for the area it is padding for? Not sure if it’s padding… I’m using Firebug.

Can someone help me remove it or make it smaller?

My site: https://www.geimaku.com/

Thanks.