Cascading Style Sheets (CSS) is a style sheet language used to describe the presentation semantics (the look and formatting) of a document written in a markup language.

snippet - Center Floats with CSS
17 Apr, 2011
Center floating divs or menus or any kind of floats using css.
written tutorial - Round Corners for HTML Divs in CSS
12 Sep, 2010
This tutorial shows you how to make round corners for divs. From scratch with and without jQuery UI library.
written tutorial - 100% layout with footer bottom of the page
3 Sep, 2010
This tutorial shows how you can make 100% height and width layouts with footer that stays always at the bottom of the page.