3.0.0 Use one-character class and ID names

Obviously, it's more efficient to use less characters. So instead of using a class named "orangehyperlink", just call it "o". This makes your markup harder to interpret when you view the page source, but - a browser doesn't care! An advanced implementation can rewrite all your element classes and CSS selectors to be as short as possible, using 1-letter class names until they are all used up, then using 2-letter ones if more are required. Some CSS compressors do this automatically.