For discussion and questions related to CMS Specific templates and stylesheets (CSS), and themes. or layout issues. This is not a place for generic "I don't know CSS issues"
* make your template/css
*bind your css code to that template
*select by template use for all pages ( possible option )
*go to/ make your page and select the tab options and your select template you want to use by the template selectionbox.
And voila you have and other template on that other page. and this is the way you do where want to select a other template.