.viewport {
	width: auto;
	height: 460px;
	max-height: 540px;
    min-width: 600px;
	
}

#viewport canvas {
    position: absolute;
  }

canvas {
      background-color: transparent;
  }

#box {
    position: absolute;
    top: 100px;
    left: 50px;
}

.controlli {

}