anchor.diff:        }
         .special-panel {
           position: absolute;
  -        background: #333333;
  +        background: #f1f1f1;
  +        border-left: solid 1px #e8e8e8;
  +        border-top: solid 1px #e8e8e8;
  +        border-bottom: solid 1px #e8e8e8;
  +        overflow: scroll;
         }
         .panel-right .special-panel {
           left: 50vw;
  
positive.code: 
            if (! gameInstance) {
              gameInstance = UnityLoader.instantiate("gameContainer", "<%= "#{@unity_json}" %>", options );
            } else {
              // resize the canvas
              var $g = $('#gameContainer');
              $g.css({ width: options.width, height: options.height });
              var $c = $g.find('canvas').get(0);
  
negative.code:             $c.setAttribute('height', parseInt(options.height));
            }
  
            // resize EPUB
            setTimeout(function() {
               window.dispatchEvent(new Event('resize'));
            }, 0);
          }
  
  