.float {
    position: fixed;
    right: 20px;
    bottom: 50px;
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background-color: #25D366;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 100;
    transition: background-color 0.3s;
    text-decoration: none;
}

.my-float {
    width: 70%;   /* ou 100% se preferir ocupar tudo */
    height: 70%;
    fill: white;
}

.float:hover {
    background-color: #dc8699;
}