Is it Up: implement design updates

Fix for issue #685

Desktop:
![screen shot 2014-07-03 at 12 02 42](https://cloud.githubusercontent.com/assets/3652195/3508198/aea716e8-0687-11e4-80d3-865a01b0db1c.png)

Mobile view (width: 320px):
![screen shot 2014-07-03 at 12 01 19](https://cloud.githubusercontent.com/assets/3652195/3508192/999d195a-0687-11e4-9703-91cbe0487227.png)

Mobile view 2 (width: 480px):
![screen shot 2014-07-03 at 12 02 29](https://cloud.githubusercontent.com/assets/3652195/3508194/a5b4b1a8-0687-11e4-8363-8a736a7b4abd.png)


please use newlines for multiple selectors:

```css
.zci--is_it_up h5,
.zci--is_it_up h5 a,
.zci--is_it_up .response_time a {
```