.btn-whatsapp a {
  color:#fff;
  text-decoration:none;
  display:block;
}
.btn-whatsapp {

  position:fixed;
  right:10px;
  bottom:10px;
  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;
  z-index:5;
}
.pulsaDelay:after { animation-delay: .5s; }
@keyframes animate {
  0%   { transform: scale(0.5); opacity:0; }
  50%  { opacity:1; }
  100% { transform: scale(1.2); opacity:0; }
}

/* Exibe o botão apenas em desktops */
@media (max-width: 991px) {
  #mostrarWhats {
    display: none !important;
  }
}