.back_to_top__container {
	display: none;
}
.back_to_top__container .back_to_top__link {
	position: fixed;
	display: block;
	bottom: 20px;
	right: 25px;
	width: 48px;
	height: 48px;
	outline: none;
	background: url("up_arrow.png") no-repeat center center #bbb;
	border-radius: 3px;
	opacity: 0.5;
	-webkit-transition: .5s;
	-o-transition: .5s;
	transition: .5s;
}
.back_to_top__container .back_to_top__link:hover {
	opacity: 1;
}