html {
	margin: 0px;
	padding: 0px;
	background-color: #ccc;
}

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

#blackbar-top {
	position: fixed;
	left: 0px;
	top: 0px;
	width: 100%;
	height: 100px;
	background-color: #000;
}

#blackbar-bottom{
	position: fixed;
	bottom: 0px;
	left: 0px;
	width: 100%;
	height: 100px;
	background-color: #000;
}