#to-top-button {
	position:fixed;
	width:50px;
	height:50px;
	z-index:10;
	right:0;
	bottom:50px;
	
	display: none;
	background: #000 url(../images/arrow-up-white.png) 50% 50%;
	border: 2px solid #fff;
	color: #fff ;
	text-align:center;
	padding:4px;
	font-size:32px;
	border-right: none;
	border-top-left-radius: 10px;
	border-bottom-left-radius: 10px;
	cursor: pointer;
	opacity: 0.5;
	transition: 0.25s ease;
	-webkit-transition: 0.25s ease;
	-moz-transition: 0.25s ease;
	-o-transition: 0.25s ease;
	-ms-transition: 0.25s ease;
}
#to-top-button:hover {
	background:#ccc url(../images/arrow-up-black.png) 50% 50%;
	border-color:#000;
	color:#000;
	font-weight:bold;
}