One of the easiest ways to change a well written theme in a Web content management system is by tweaking the Cascading Style Sheet (CSS). To be honest, I'm horrible at theme development. I prefer to focus my time on function, administration, and content of the information system. However, any bit of information that helps you tweak those themes you downloaded for that CMS is good news, right? After enough tweaks, you can may just have a theme with a style you can call your very own.
Over the last few years web-developers have written many articles about CSS and developed many useful techniques, which can save you a lot of time - of course, if you are able to find them in time. Below you’ll find a list of techniques we, as web-architects, really couldn’t live without.