.back-to-top {
    display: none;
    position: fixed;
    right: 12%;
    bottom: 4%;
    width: 50px;
    height: 50px;
    z-index: 9;    
    border-radius: 25px;
    border: 1px solid #dbdbdb;

    background: url('/img/back_top.png');
    background-position: center;
    background-size: cover;

    font-size: 14px;
    font-weight: bold;
    color: #6e6e6e;
    text-align: center;
}
@media (max-width: 1279px) {
    .back-to-top {right: 2%;}
}