.btn-floating-whatsapp {
  width: 60px;
  height: 60px;
  display: flex;
  justify-content: center;
  align-items: center;
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  cursor: pointer;
  background-color: #25d366;
  border-radius: 50%;
  user-select: none;
  box-shadow: 0px 4px 10px 0px rgb(0 0 0 / 15%);
  z-index: 9998;
}
.btn-floating-whatsapp svg {
  width: 70%;
  height: 70%;
}

.btn-floating-whatsapp__animated:before {
  content: "";
  border-color: inherit;
  width: 60px;
  height: 60px;
  border-radius: 50%;
  position: absolute;
  box-shadow: 0 0 0 0 rgba(37, 211, 101, 0);
  animation: _pulse 1.2s infinite;
}

/* keyframes */
@keyframes _pulse {
  0% {
    box-shadow: 0 0 0 0 rgba(37, 211, 101, 0.75);
  }
  100% {
    box-shadow: 0 0 0 15px rgba(37, 211, 101, 0);
  }
}