Fixed up formatting of code.
Moved styles from internal to external file: Makes code cleaner and easier to maintain

Added responsive fix when the screen is below 900px, looks nice on mobile.

Differences:

Before: http://i.imgur.com/DFvQz20.png
After: http://i.imgur.com/lvgqIB4.png

Before: http://i.imgur.com/ptYsPBa.png
After: http://i.imgur.com/joG06yk.png