Use ruby 1.9.3 on heroku.
Add meta[viewport] tag.
Add carrierwave.
Upgrade rails.
Drop HTML5 tags.
Drop section's border radius.
Use border-box as the default box model.
Remove decoration.
Change h1 border appearance.
Add image column to campaigns.
Nest Campaign inside Campaigns.
Add campaigns image uploader.
Mount image uploader in campaign.
Add comment about ignoring .env.
Ignore carrierwave uploads dir.
Use an ordered list to list the campaigns.
Show campaign image on campaigns listing.

Image from

http://www.freeimageslive.com/galleries/backdrops/abstract/pics/abstractbluefilters2.jpg
Prefer expliciteness to encapsulation.
Extract partial to build the campaigns list.
Show campaigns differently on homepage.