div#cover
{
	position: absolute;
	top: 0;
	left: 0;
	right: 0;
	bottom: 0;
	background-color: white;
	text-align: center;
}

div#cover_contents
{
	/*position: absolute;
	top: 50%;
	left: 50%;
	min-width: 300px;
	transform: translate(-50%, -50%);*/
	display: inline-block;
	max-width: 480px;
	max-height: 500px;
	min-width: 300px;
	margin-top: 10%;
	margin-bottom: 10%;
	border-left: 10px solid white;
	border-right: 10px solid white;
	text-align: left;
	font-size: 13px;
}

div#cover_contents img
{
	max-width: 480px;
	width: 100%;
	height: auto;
}