Sorry - I wasn't being clear. I am looking for some kind of CSS framework that will do Android/iOS styles for buttons, tabs, transitions, etc. You get this kind

Sorry - I wasn't being clear. I am looking for some kind of CSS framework that will do Android/iOS styles for buttons, tabs, transitions, etc. You get this kind of stuff with jQuery Mobile - but I didn't see how it was done with the Backbone/Zepto stack (aside from the kind of hacky animations in the demo).