Fix gutter for mobile

Before: ![screen shot 2014-04-04 at 14 38 39](https://cloud.githubusercontent.com/assets/68009/2615812/99781070-bbfe-11e3-870c-09bbee1f917d.png)

After: ![screen shot 2014-04-04 at 14 38 26](https://cloud.githubusercontent.com/assets/68009/2615811/98581a78-bbfe-11e3-8150-a37dd8d59e05.png)