body {
	margin-top:25px;
}

#authentication {
	text-align:right;
	margin-right:50px;
}

tooltip {
	position:relative;
	display:inline-block;
}

tooltip tooltiptext {
	visibility: hidden;
	width: 120px;
	background-color: black;
	color: #fff;
	text-align: center;
	padding: 5px 0;
	border-radius: 6px;
	position: absolute;
	z-index: 1;
}

tooltip:hover tooltiptext {
	visibility:visible;
	width: 120px;
	top: 100%;
	left: 50%; 
	margin-left: -60px;
}