.back-to-top {
    position: absolute;
    left: 50%;
    bottom: 0;
    transform: translateX(-50%);
    -webkit-transform: translateX(-50%);
}

.back-to-top:hover {
    opacity: 1;
}

.bg-dark .back-to-top {
    border-color: #fff;
}

.bg-dark .back-to-top:active,
.bg-dark .back-to-top:focus {
    color: #fff;
}

.bg-dark .back-to-top:hover {
    background: none;
}


.back-to-top {
    position: fixed;
    background: #25D366;
    color: #fff;
    width: 60px;
    height: 60px;
    text-align: center;
    line-height: 65px;
    border-radius: 50%;
    right: -15px;
    left: auto !important;
    bottom: 20px;
    font-weight:400;
    z-index: 99;
    -webkit-box-shadow: 3px 4px 10px -4px rgba(0,0,0,0.6);
    -moz-box-shadow: 3px 4px 10px -4px rgba(0,0,0,0.6);
    box-shadow: 3px 4px 10px -4px rgba(0,0,0,0.6);
}

.back-to-top i {
    padding-top:16px;
    color: #fff;
}
@media (max-width: 768px) {
    .back-to-top{
        right: -15px !important;
        left: auto !important;
        bottom: 30px;
    }
}