.whatsapp{
    position: fixed;
    bottom: 100px;
    right: 30px;
    width: 70px;
    height: 70px;
    background: #25D366;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: visible;
    z-index: 40;
}

/* contenido (esto es lo que late) */
.contenido{
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
}

.contenido img{
    width: 40px;
}

/* ondas */
.wave{
    position: absolute;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: rgba(37,211,102,0.4);
    z-index: -1;
}