.btn-top {
    background-image: url('/images/top.png');
    background-repeat: no-repeat;
    border: medium none;
    bottom: 6px;
    cursor: pointer;
    display: none;
    height: 41px;
    outline: medium none;
    padding: 0;
    position: fixed;
    right: 20px;
    width: 41px;
    z-index: 9999;
    background-color: rgba(255, 255, 255, 0.6);
    border-radius: 21px;
}

.btn-top:hover {background-color:white}