Skeleton - A Dead Simple, Responsive Boilerplate for Mobile-Friendly Development

Skeleton is lightweight and simple. It styles only raw HTML elements (with a few exceptions) and provides a responsive grid. Skeleton only styles a handful of standard HTML elements and includes a grid, but that's often more than enough to get started. The grid is a 12-column fluid grid with a max width of 960px, that shrinks with the browser/device at smaller sizes.