ia.css: some design updates from Chris

New:
![screen shot 2014-12-17 at 3 03 08 pm](https://cloud.githubusercontent.com/assets/81969/5477972/12171e1c-85fe-11e4-9c0e-85a21e958385.png)

Old:
![screen shot 2014-12-17 at 3 04 27 pm](https://cloud.githubusercontent.com/assets/81969/5477973/12173a46-85fe-11e4-8e42-72d142e21a5c.png)