Cascading Style Sheets (CSS) is a style sheet language used to describe the look and formatting of web pages. CSS is designed to separate page content from how the page is presented.
vBulletin uses CSS to style the pages of a site and invludes a user-friendly interface in which you can enter values to control the styling. The vBulletin Style Manager creates CSS for you so you don’t have to know the details of CSS in order to style your site.
The next few topics provide an introduction to CSS and how vBulletin uses it.