Page Grid Component
A CSS utility for creating page layouts with a grid system.
The page grid module establishes the rows, columns and areas onto which child elements can be placed. The page grid is fully responsive.
Setting up a responsive page grid requires two key elements: a container element, and the grid element itself.
The container element takes care of positioning the grid in relation to the page (typically center-justified) and adds outer margins.
The grid element creates the actual columns (and gutters); eight columns for small viewports, sixteen for large.
