Skeleton's responsive grid with smaller margins

A few weeks ago I was looking for a simple grid system and as I am not a front-end developer I decided to go with a really simply and well known solution, Skeleton boilerplate.

Well, Skeleton's grid was almost what I was looking for... except for one thing, the annoying wide margins between columns - 4% of the row's width.

So, I decided to modify Skeleton's grid using 1.2% of the row's width for margins.

If you find yourself in similar position, feel free to use it.