I've been playing with Foundation recently but I've found the lack of documentation for the Compass gem to be frustrating. It's not clear what mixins you need

I've been playing with Foundation recently but I've found the lack of documentation for the Compass gem to be frustrating. It's not clear what mixins you need to include to make a site responsive without trial and error. There's also a few mixins missing that would be useful; for example moving a field label to the left you add the classes "right inline" but there's no mixin to do this so I have to litter my markup with styling class names.