The JSP pages you develop for your application and the way you style them is driven by your application’s requirements. Commerce Reference Store uses the same JSP pages for all of its sites along with a set of site-specific cascading style sheets (CSS) that style the templates differently for the different sites and locales. Commerce Reference Store uses a custom site configuration property, cssFile, along with JSP code to set the cascading style sheet used for each request. The remainder of this section describes how this mechanism works.