title: Site Modules vs. Library Modules with BEM and SMACSS
body: <p>Here's a situation I run into a lot with CSS architecture using BEM/SMACSS. I'd like to see how other developers handle it.</p>
  
  <p>You have a library of CSS modules that you use across multiple sites. Modules like <code>.btn-group</code>, <code>.nav-tabs</code>, etc.</p>
  
  <p>Then you encounter a module that's styled in a very site-specific way -- it's too unique to be able to use one of your library modules.</p>
  
  <p>So you have the code for that "site module" in a Sass/Less file and you save it with the other style code for that site, like the layout styles. It's not saved with your "library modules."</p>
  
  <p>My question is: do you do anything to distinguish the "site module" from your "library modules"?</p>