.back-top {
	z-index:100;
    position: fixed;
    bottom: 80px;
    right: 15px;
    width: 48px;
    height: 48px;
    display: block;
    background-image: url("../../images/top48.png");
    /*background: rgba(200,200,200,0.5) url(up-arrow.png) no-repeat center center;*/
    background-size:100%;
    border-radius: 10px;
    transition: 1s;
	}
  
	.back-top:hover {
	z-index:100;
	background-image: url("../../images/top48.png");
    /*background-color: #777;*/
	}