.fab {
    padding: 25px;
    font-size: 45px;
    width: auto;
    text-align: center;
    text-decoration: none;
    border-radius: 50%;
    }
    
    .fab:hover {
    opacity: 0.5;
    }
    
    .fa-whatsapp {
    background: #32ec1a;
    color: white;
    
    }