Ok, so I think I found a solution here. I’m using body:after to create a “faux background” that starts from the left of the browser window. The benefit of this is no extra divs, and just a few lines of CSS. I then give my content div the same background as the body and voila!
Here’s a CodePen with my results: http://codepen.io/realph/pen/recAg
Works pretty well, right?