#back-top
{
    position: fixed;
    bottom: 30px;
    right: 0;
}

#back-top a
{
    color: white;
    text-decoration: none;
}

#back-top a i
{
    margin-left: -2px;
    margin-top: 2px;
}

#back-top:hover
{
    background: #8AB15A;
    opacity: 0.8;
}

#back-top
{
    background: none repeat scroll 0 0 rgba(0, 0, 0, 0.75);
    border-radius: 3px 3px 3px 3px;
    bottom: 60px;
   /* bottom: 20px;  previous code*/
    cursor: pointer;
    display: block;
    font-size: 16px;
    height: 45px;
    line-height: 45px;
    position: fixed;
    right: 20px;
    text-align: center;
    width: 45px;
    z-index: 9999;
}