anchor.diff:  aside .chapters-navigation {
     display: block;
     float: right;
  -  margin-top: 2em;
  +  margin-top: 0.5em;
     width: 95%;
   }
   aside .chapters-navigation ol {
  
positive.code:   float: left;
  }
  .guide article .inner {
    padding: 2em 2.5em 1em 2.5em;
  }
  #wrapper.guide aside {
    float: left;
  
negative.code:   background-image: url(<%= asset_path "icon-guide-l.png" %>);
  }
  #wrapper.guide hgroup h1 span {
    color: #2F8ACA;
  }
  #wrapper.guide header {
    position: relative;
  }
  #wrapper.guide header hgroup {
    border-top: solid 4px #2F8ACA;
  /*  min-height: 5.75em;*/
    margin-left: 0;
  }
  