Have you heard of Chris Coyier and CSS-Tricks.com? If not, I will advice you to visit his site, you will find a lot of good tutorials and video tutorials, for beginners and for advanced users of HTML and CSS. In this post I will talk very vague about Chris’s work, letting you to discover what he might offer you.
If you have a site powered by wordpress, and want to make certain modification you must know what HTML and CSS are and how this works. For this Chris Coyier had prepared for you some nice lessons you might wanna try. Bellow is a video made by Chris in which you will learn the basic of HTML & CSS. Enjoy!