title: How to discover the file that contains a CSS definition
body: <p>I am dealing with a complex page with a lot of CSS files (that were not created by me). I am fighting with a CSS style that is not on the more obvious places (css files) that I can find and I don't have a clue where it is being define.</p>
  
  <p>Is there any tool available that can tell me the file where a particular property of a class or id is being defined (having in mind that this property can be inherit from other definition)?</p>