Make clean and productive HTML markup and CSS styling without getting a headache, using the Yahoo! User Interface Library (YUI).

Get a fluid multi-column page layout in minutes with YUI CSS Grids. Control your browser compatibility and font crises with YUI Reset and YUI Fonts (all for a few KB extra CSS made by the friendly people at Yahoo!)

Design for programmers: Easily spruce up your page with padding, margins, font colors, and more advanced CSS tricks. Style the YUI Javascript widgets!

Straighten out confusing things like: How does "float" work? How do I mix relative and absolute positioning? Inline div? Block span? Learn how to really cascade your CSS. The pragmatic way to use tables.

Developer tools for Firefox, MSIE, and OS X to help build and validate your code.

Pre-requisite: Basic knowledge of HTML and CSS.