C S S (Cascading Style Sheet)

CSS is an abbreviation for Cascading Style Sheets. CSS works with HTML and other Markup Languages (such as XHTML and XML) to control the way the content is presented. Cascading Style Sheets is a means to separate the appearance of a webpage from the content of a webpage. CSS is a recommendation of the World Wide Web Consortium(the W3C).

What's the "Cascade" part of CSS?

The cascade part of CSS means that more than one stylesheet can be attached to a document, and all of them can influence the presentation. For example, a designer can have a global stylesheet for the whole site, but a local one for say, controlling the link color and background of a specific page. Or, a user can use her own stylesheet if she has problems seeing the page, or if she just prefers a certain look.

Anatomy Of CSS

Selector{ 
property1: some value; 
property2: somevalue; 
} 

The declaration contains the property and value for the selector. The property is the attribute you wish to change and each property can take a value. The property and value are separated by a colon and surrounded by curly braces:
body { background-color: black}
If the value of a property is more than one word, put quotes around that value:
body { font-family: "sans serif"; }