With as all being very careful about resources within web development I am looking for a tool that you can pass a url and it show what CSS is actually used on that page but more importantly have the ability to download or extract that CSS Selectors and the actual css to create a single css of only the css needed to render that page, I have tried DustMe and various plugins. I realized I am not using 89% of bootstrap for example but picking it apart is almost impossible on pre built sites.
thanks