I have built a very simple grids system which is 100% responsive, including a nav and a footer. Tested on my Galaxy S2 so it should be quite nice on newer phones! :)
I would like to get some feedback on this design, I find it more intuitive for the following reason:
-standard grid system: .col-1, .col-2, .col-3…
-My system: .col-25, .col-50, .col-75…the numbers reflect the percentage instead of having to figure out which is which.