CSS is the acronym of Cascading Style Sheet. A CSS file determines the graphic properties of the objects of a web page. Multiple style sheets can be used to override certain properties, hence the term “cascading”.

For example, to determine the color and style of text paragraphs and links specified with the <a> html tag we add the following property to the CSS file:

body {
	font: normal 85% Verdana, Helvetica, sans-serif;

p {
	margin-bottom: 1em;
	line-height: 1.3;

a {
	color: #000;
	font-family: Verdana, Helvetica, sans-serif;
	font-weight: normal;
	text-decoration: none;

a:hover {
	color: #007;
	text-decoration: underline;