The popularity of CSS grids have been increasing steadily over the past years. They bring balance to our pages, and help us build interfaces more quickly. Most grids are one-dimensional: you specify their width and they adapt in height to their content.
Crisscross, however, is two-dimensional: you can specify both width and height, relative to the width of the container.
This allows you to draw responsive squares and rectangles that will always keep the right proportions.
The full documentation, along with examples, is available in doc folder as a HTML file.