title: How to get just the responsive grid from Bootstrap 3?
body: <p>I need to add responsive design features to my web application using Twitter Bootstrap. I just want the responsive behavior, I'm not interested in the typography, components or any other stuff included in Bootstrap. </p>
  
  <p>I got a <a href="http://getbootstrap.com/customize/" rel="noreferrer">customized Bootstrap version</a> just selecting the grid system. However, when I add the generated CSS to my application, all my styles are messed up (header, links and others). Why is that happening? How can I get a Bootstrap CSS with just the grid system? I would like to avoid a manual modification of the Bootstrap files.</p>