.botonwa{
    background-color:#008000;/*plato*/
    border:1px solid #fff;
    position:fixed;
    z-index:999;
    border-radius: 50%;
    bottom:30px;
    left:20px;
    padding:15px;
    transition:ease 0.3s;
    animation:efecto 1.2s infinite;
}

.botonwa:hover{
    transform: scale(1.1);
    transition: 0.3s;
}

.wa{
    width: 80px;
    transition: ease 1s;
}

@keyframes efecto{
    0%{
        box-shadow: 0 0 0 0 rgba(0, 128, 0, 0.90);/*color sombra*/
    }
    100%{
        box-shadow: 0 0 0 25px rgba(0, 0, 0, 0);
    }
}