Quote Originally Posted by dbgtz View Post
That's almost 6 years old and can hardly be described as solid evidence. There's lots of unnecessary repeated definitions because he's using two or more classes rather than splitting it into class and ids (I can only see 2 lines that are different between .button and .button2 out of 21 lines).
The age of the article is irrelevant, believe me the content of it IS relevant. Ids are too specific and create problems further down the line. They're great for javascript hooks and page anchors but not for styling. Do some research and you will find more on it.