#back-to-top {
    background: #7db248;
    color:white;
    position: fixed;
    bottom: 20px;
    right: 20px;
    display: none;
    border:1.2px solid white;
}

.tooltip-arrow::before {
    border-bottom-color: #7cb347 !important;
    border-top-color: #7cb347 !important;
}