CSS – An Introduction
Cascading Style Sheet (or CSS) documents are a set of rules that contain the elements of style for a web site, such as background color, font size and type, boxes, and borders. HTML or XHTML documents contain the text and content, but link to CSS documents to control how the page looks. So, CSS has style, and HTML has substance. These style commands “cascade” down from the homepage on through the rest of the site architecture, affecting the entire site. This means that making a change on an external style sheet can update the appearance of the entire site!
My Slideshare presentation outlines the basics of what CSS is and isn’t, how and why it’s used, benefits, and a visual example.