Pure CSS is used to vary the look of the generated webpages according to the screen acreage available. What is varied is the size of text and certain divs, the size of images used, and the logo used at the top of the webpage.
Jadawin supports four different page sizes. These page sizes are defined in the configuration file, as an array of width and heights for the dimensions/browser key. The CSS code uses media queries to change the look and feel based on the actual page width.