title: css framework for an app with existing stylesheet
body: <p>I am building a chrome extension that attaches a widget sort of thing to gmail message. It appears below every email (something like a gmail contextual gadget) when the user is on gmail.com site.</p>
  
  <p>I looked at few css frameworks like twitter bootstrap to use in my app. When I used it in mywidget, it messed with the existing gmail styles because of css class name clash. Is there any other framework that I can use where there would be no name clash? I came across jquery-ui framework. All the classnames here start with .ui-* thereby causing no name clash. Are there any other css frameworks like this with unique class names?</p>