anchor.diff:  }
   
   .button.medium {
  -  font-size: 1.5em;
  +  font-size: 1.25em;
   }
   
   .button.big {
  
positive.code: 
  a[rel="external"]:after {
    content: url(<%= asset_path "external-link.png" %>);
    padding: 0 0.25em 0 0.25em;
  }
  
  /*
  
negative.code:   position: relative;
    text-decoration: none;
    -webkit-transition: background-color 0.5s ease-in-out;
    -moz-transition: background-color 0.5s ease-in-out;
  }
  .button:hover {
    background-color: #DD322D;
    color: #fff;
  }
  .button:active {
    background-color: #DD322D;
    top: 1px;
  }
  .button:focus {
  