#backToTop{
    position: fixed;
    right: 20px;
    bottom: 20px;

    width: 45px;
    height: 45px;

    background: #F79A19;
    color: #000;

    font-size: 22px;
    font-weight: bold;

    cursor: pointer;

    box-shadow: 0 4px 10px rgba(0,0,0,.25);

    z-index: 999999;

    display: none;

    transition: .3s;
}

#backToTop:hover{
    transform: translateY(-3px);
    background:#F79A19;
}