CSS is used to format your web page. As one CSS file can be used across many different pages file sizes are smaller and download times are quicker after the style sheet has been loaded the first time.

The current version is CSS2 with CSS3 under development.

Tutorials:

Basics of CSS

This page explains the basics of CSS such asapplying styles to elements and adding stylesheets to a web page.

The Box Model

This page explains how HTML elements are represented in CSS and how different size elements work.

Uses of CSS boxes

This page explains some of the practical uses of CSS boxes such as resizing elements or editing borders.

CSS Positioning

This page explains how to use CSS positioning to place HTML elements in the places on the page that you want them to appear.

Colours and backgrounds

This tutorial explains how to add colours and backgrounds to your pages using CSS.