.btn-whatsapp a {

    color:#fff;
    text-decoration:none;
    display:block;
}

.btn-whatsapp {
    z-index: 1;
    position:fixed;
    right: 5px;
    bottom:30px;
    transform: translate(-50%, -50%);
    background-color:rgb(37, 211, 102);
    width:60px; height:60px;
    text-align:center;
    line-height:58px;
    font-size:1.8em;
    color:#ffffff;
    font-weight:100;
    border-radius:50%;
}

.btn-whatsapp:before,
.btn-whatsapp:after

{

    content: '';
    display:block;
    position: absolute;
    border-radius:50%;
    border:1px solid #25d366;
    left: -20px;
    right: -20px;
    bottom: -20px;
    top: -20px;
    animation: animate 1.5s linear infinite;
    opacity:0;
    backface-visibility:hidden;
}

.pulsaDelay:after { animation-delay: .5s; }

@keyframes animate {


    0%   { transform: scale(0.5); opacity:0; }
    50%  { opacity:1; }
    100% { transform: scale(1.2); opacity:0; }

}