S2JS - More HTML and introducing <b>CSS</b> : CSS tutorial and reference

You can learn the basics of CSS in just an hour, but mastering takes a lot longer.

It's totally worth it, because CSS is the magic wand that can make your web sites

amazing

(This effect doesn't involve any Javascript — just a handful of CSS)

There are many online resources to learn CSS.

Take a thorough look through the w3Schools CSS Tutorial, or if you think you're already past that, the CSS Reference Guide.