Introducing cascading style sheets: one can efficiently format an unlimited number of web pages with a consistent appearance, advantages: Greater functionality: cross-browser support allows css to appear in all web browsers without any differences. Understanding how styles are written: a style is a consistent, recognizable pattern, a css style is a collection of one or more rules, a style sheet is a collection of styles, rule. Combination of a selector, a property, and a value: selector. You can apply a style to an identified element. Class selectors (used to select a specific xhtml element or format one or more elements on a web page, Id selectors( used to select uniquely format a single element on a web page) Property describes how the selector will be modified. Each property and value pair (color:white) is called a declaration. Paragraph format places all the css code on one or more lines as wrapping text.