How do I create a new theme?

dadaIMC relies heavily on CSS2 stylesheets for its design and layout. It ships with 3 required stylesheets: "Administration," which should not be altered, "Printable", which can be tweaked to modify the printed output of pages, and the "Default" stylesheet. These can be modified with the built-in stylesheet editor, found in the Site Administration section. It is not recommended that you modify the default stylesheet. It's quite easy to render a site unreadable with poor stylesheets, and you probably want a master stylesheet around. The best option is to click to edit the Default stylesheet, and then click the "Clone Stylesheet" button. This will make a duplicate of the default stylesheet, and allows you to give it a new title and filename. Stylesheets listed as belonging to the base module govern all dadaIMC pages, and contain CSS selectors found throughout the site. In many cases, each module you have installed loads its own stylesheet. Modules initially load a module-specific stylesheet with the same filename as the base stylesheet, and default to their own "default.css" if there is no file with the same name as the base stylesheet.