body {
	font-family: Arial;
	font-size: 16px;
	line-height: 1.5;
	
	background-color: #ffffff;
	color: #333333;
	margin: 40px auto 40px auto;
	width: 620px;
}


canvas {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}