Simple Grid is a basic lightweight grid, not a CSS framework. There are no styles for buttons, tables, typography etc. etc. Simple Grid comes with two different types of grids. There is a grid for content, which looks like <div class="col-1-3"></div> and a grid for layouts, which looks like <div class="col-4-12"></div>. Simple Grid is also built for responsive layouts. With fluid columns, the grid will resize to adjust to the browser resolution. To accommodate for mobile and tablet devices, the grid will essentially stack all columns, one above another, when viewed on smaller screens. To see the grid in action jump on over to the Simple Grid example page.