body {
  background-color : #ffffff;
  text-align: center;
  margin : 5px 0px 0px 0px;
  padding: 0;
}

#mainbody {
	width: 1024px;
	height: 100%;
	text-align: center;
	margin: 0 auto;
	padding: 0;
}

#tutoVideo {
	display: block;
	width: 1024px;
	height: 768px;
	margin-top: 10px;
	margin-bottom: 10px;
	text-align: center;
}

#videoReturn {
	display: block;
	width: 150px;
	height: 25px;
	margin: 0 437px 0 437px;
	padding: 10px;
	border: 2px solid #16365C;
	border-radius: 5px;
	background-color: #8DB4E0;
	font-size: 20px;
	font-family: "HG丸ｺﾞｼｯｸM-PRO",serif;
	text-align: center;
	text-decoration: none;
	color: #16365c;
}
#videoReturn:hover {
	background-color: #C5D9F0;
}