Increase width on specific page with Evolve Theme

I had to abandon the use of Blue Grace and go back to Evolve. I was able to disable my side bar for my store page but I’m unable to widen the content. This theme is all over the place and not easily followed in my opinion. However, it has many options for dummy’s like me.

Can anyone help with a code? I’ve tried adding .store { width 100%; } to the stylesheet. Here’s my problem link. http://paintprincess/store

Thanks in advance for the help!