anchor.diff:      width: 40px;
   }
   
  -body.side-compact > main
  +.side-compact > main
   {
       padding-left: 80px;
   }
  
positive.code: }
  
  body > aside,
  body > main
  {
      position: relative;
      min-height: 100%;
  
negative.code:     z-index: 10;
      background: #fff;
  }
  .side-compact main footer
  {
      margin-left: 80px;
  }
  
  
  main footer .tools
  {
      height: 40px;
      background: #e6e6e6;
  