I did exactly the same for almost every project I started. Just extract the grid, vendor-prefixes and a few other generic rules for alignment and you're set. T

I did exactly the same for almost every project I started. Just extract the grid, vendor-prefixes and a few other generic rules for alignment and you're set. The only wish I could make is a "simplified" responsive menus/navbars, so it would be easier to build on top of that after.