An old skool Cascading Style Sheets (CSS) for a responsive HTML grid arrangement web page.
The responsive CSS code in the style sheet grid.css is suitable for laying out a web page with columns, headers and footers that is mobile friendly. It is a mobile responsive CSS and friendly to older browser versions (hence old skool). This is because it only uses the older CSS 2 and not the grid module features from CSS 3.
For more information try the Grid CSS test HTML file and browse its HTML code, and look at the article Grid CSS Old Skool.