As we mentioned in Chapter 1, Responsive Web Design, Responsive.gs is a lightweight CSS framework. It comes only with the bare minimum requirements for building responsive websites. In this section, we are going to see what is included in Responsive.gs.
Responsive.gs is shipped with a series of reusable classes to form the responsive grid that makes it easier and faster for web designers to build web page layout. These classes contain preset style rules that have been carefully calibrated and tested. So we can simply drop in these classes within the HTML element to construct the responsive grid. The following is a list of the classes in Responsive.gs: