What is CSS (Cascading Style Sheets)?
Cascading Style Sheets, style sheets when attached to documents describe how the document is displayed or printed, e.g. a CSS sheet is attached to a HTML (Hyper Text Markup Language) document, to influence its layout when it is accessed via a computer Internet browser such as Internet Explorer or Netscape.
Cascading Style Sheets are used by both web site authors and readers of web pages to define colors, fonts, layout, and other aspects of web site document presentation.
An example of a Cascading Style Sheet is Shown Below: