.ab-scroll-to-top {
    position: fixed;
    bottom: 20px;
    right: 25px;
    width: 40px;
    height: 40px;
    display: block;
    z-index: 1000;
    display: none;
    text-decoration: none;
    border-radius: 3px;
    -webkit-border-radius: 3px;
    -moz-border-radius: 3px;
    background-color: #696969 !important;
    opacity: 0.7 !important;
    text-align: center;
}

.ab-scroll-to-top i {
    color: #ffffff;
    font-size: 40px;
    position: relative;
    bottom: -2px;
    margin: auto;
    -webkit-transition: all 0.3s ease;
    -moz-transition: all 0.3s ease;
    -ms-transition: all 0.3s ease;
    -o-transition: all 0.3s ease;
    transition: all 0.3s ease;
}

.ab-scroll-to-top:hover i {
    bottom: 5px;
    cursor: pointer;
}