Half-width "wide box" - any hack ideas to make this work?

I’m sure many of you know this current trend in web design, where there are two boxes next to each other - one of them is solid, and the other has a picture in it.

The missing element for me in sparkle is that each of these boxes is basically a “wide box” element, and they expand to fit the entire width of the page… HOWEVER, they only go to the center of the page and stop.

Is there any easy CSS rule I can add to my wide box to have it stop mid-page?

Example attached from a sample wordpress site.

Thanks all!

Don’t tell anyone…


HAHAHAHA!!! Love you Duncan.

@duncan - brilliant. Here’s my result using your tip. Thanks again!