#back-top {
	position: fixed;
	bottom: 60px;
	right: 60px;
}
#back-top a {
	width: 60px;
	display: block;
	text-align: center;
	font: 11px/100% Arial, Helvetica, sans-serif;
	text-transform: uppercase;
	text-decoration: none;
	color: #bbb;
	/* background color transition */
	-webkit-transition: 1s;
	-moz-transition: 1s;
	transition: 1s;
}
#back-top a:hover {
	color: #000;
}
/* arrow icon (span tag) */
#back-top span {
	width: 60px;
	height: 60px;
	display: block;
	margin-bottom: 7px;
	background-color: #ddd;
	background-image: url('../img/chevron-up_256_0_ffffff_none.png');
	background-repeat: no-repeat;
	background-position: center center;
	background-size: 30px 30px;
	/* rounded corners */
	-webkit-border-radius: 30px;
	-moz-border-radius: 30px;
	border-radius: 30px;
	/* background color transition */
	-webkit-transition: 1s;
	-moz-transition: 1s;
	transition: 1s;
}
#back-top a:hover span {
	background-color: #777;
}