Grids is imported from Pure Grids.
Note: The file "grids.css" is deprecated, use "cssgrids.css" instead.
The foundational CSS Grids provides a simple system for layout out content. The basic components are "grids" and "units". A "grid" (yui3-g) contains one or more "units" (yui3-u). The type of "unit" chosen describes how it should be sized (e.g. "yui3-u-1-2" takes up half the grid, "yui3-u-1-3" takes up one-third, et cetera). The only constrains for YUI3 Grids are that all "units" are children of a "grid".