Here is a list of useful CSS tutorials which may help you when creating your first template theme for Joomla

CSS Tutorial sites

CSS Basics

A nice little site dedicated to teaching you the basics of Making Cascading Style Sheets Easy to Understand

Complete CSS guide Tutorial

This is a great starter guide if you want to get your head around coding in CSS.

Hands On CSS Tutorial

Another cool free tutorial prividing you with a good introduction to CSS styling.

The Complete CSS Tutorial

Another nice little tutorial covering a wide range of topics.

Understanding Joomla CSS

Tutorial to help you understand the specific

Useful CSS articles

Some useful css articles and more tutorials to help you develop your first Joomla template

an-overview-of-current-css-layout-techniques

changingman_layout

CSS Tutorials for designs nice step by step introduction to creating a CSS web design