.channel {
  width: 300px;
  overflow-x: hidden;
}
#tree {
  float: left;
}
.demo-container {
	box-sizing: border-box;
	width: 850px;
	height: 450px;
	padding: 20px 15px 15px 15px;
	margin: 15px auto 30px auto;
	border: 1px solid #ddd;
	background: #fff;
	background: linear-gradient(#f6f6f6 0, #fff 50px);
	background: -o-linear-gradient(#f6f6f6 0, #fff 50px);
	background: -ms-linear-gradient(#f6f6f6 0, #fff 50px);
	background: -moz-linear-gradient(#f6f6f6 0, #fff 50px);
	background: -webkit-linear-gradient(#f6f6f6 0, #fff 50px);
	box-shadow: 0 3px 10px rgba(0,0,0,0.15);
	-o-box-shadow: 0 3px 10px rgba(0,0,0,0.1);
	-ms-box-shadow: 0 3px 10px rgba(0,0,0,0.1);
	-moz-box-shadow: 0 3px 10px rgba(0,0,0,0.1);
	-webkit-box-shadow: 0 3px 10px rgba(0,0,0,0.1);
	-webkit-tap-highlight-color: rgba(0,0,0,0);
	-webkit-tap-highlight-color: transparent;
	-webkit-touch-callout: none;
	-webkit-user-select: none;
	-khtml-user-select: none;
	-moz-user-select: none;
	-ms-user-select: none;
  user-select: none;
  float: left;
}
.demo-placeholder {
	width: 100%;
	height: 100%;
	font-size: 14px;
}