This task involves defining a set of web design guidelines similar to this in content:

• http://visual.ly/ios-android-design-guidelines-cheat-sheet
• http://getbootstrap.com/css/

Yours doesn't have to be pretty (there's a separate task for that).  Yours can be a simple text list or an annotated set of images or an html page.  Whatever is best for conveying the design criteria.  The emphasis is putting thought into the design criteria.

As our design guidelines are not well-defined, you get to propose a consistent simple set.

Submit your design as whatever raw working files that we'd be able to edit along with a text summary.  Submit an image preview only if helpful.