anchor.diff:  }
   
   .footer_copyright {
  -    //float: left;
  -    text-align: center;
  +  text-align: center;
   }
   
   .footer_nav {
  
positive.code: 
  .navbar {
    margin: 0px;
  }
  
  .nav-bg {
  
negative.code:    }
  }
  
  .nav-float {
    float: right;
  }
  
  .nav-item {
    margin: 10px;
    color: #000;
  