.img-whatsapp {
  position: fixed;
  bottom: 120px;
  right: 20px;
  z-index: 1;

  a {
    display: inline-block;
    position: relative;

    .whatsapp_btn {
      mix-blend-mode: difference;
      border-radius: 50%;
      animation: heartbeat 1.5s infinite;
    }
  }
}

@keyframes heartbeat {
  0% {
    transform: scale(1);
  }

  25% {
    transform: scale(1.1);
  }

  50% {
    transform: scale(1);
  }

  75% {
    transform: scale(1.1);
  }

  100% {
    transform: scale(1);
  }
}

@media screen and (max-width:768px){
    .spcl{
      font-size: 20px;
    }
    .lst{
      margin-top: 10px;
      margin-bottom: 10px;
    }
   }