.whats-flutuante{
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 68px;
  height: 68px;
  background-image: url('../img/whatsapp-icone.png');
  background-size: 60%;
  background-position: center;
  background-repeat: no-repeat;

  background-color: #25D366;
  border-radius: 50%;

  box-shadow: 0 14px 35px rgba(0,0,0,.35), 
              0 0 18px rgba(37,211,102,.4);

  cursor: pointer;
  z-index: 999;

  transform: translateZ(0) scale(1) rotateY(-6deg) rotateX(4deg);
  transition: transform .35s ease, box-shadow .35s ease;
}

.whats-flutuante:hover{
  transform: scale(1.06) rotateY(-2deg) rotateX(1deg) translateY(-4px);
  box-shadow: 0 18px 45px rgba(0,0,0,.45),
              0 0 24px rgba(37,211,102,.55);
}

.whats-flutuante{
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 68px;
  height: 68px;

 background-image: url('../img/whatsapp-icone.png');
  background-size: 60%;
  background-position: center;
  background-repeat: no-repeat;

  background-color: #25D366;
  border-radius: 50%;

  box-shadow: 0 14px 35px rgba(0,0,0,.35), 
              0 0 22px rgba(37,211,102,.55);

  cursor: pointer;
  z-index: 999;

  transform: translateZ(0) scale(1) rotateY(-6deg) rotateX(4deg);
  transition: transform .35s ease, box-shadow .35s ease;

  animation: whats-pulse 2.6s ease-in-out infinite;
}

@keyframes whats-pulse{
  0%, 100%{
    transform: scale(1) rotateY(-6deg) rotateX(4deg);
    box-shadow:
      0 14px 35px rgba(0,0,0,.35),
      0 0 20px rgba(37,211,102,.45);
  }
  50%{
    transform: scale(1.08) rotateY(-4deg) rotateX(2deg);
    box-shadow:
      0 22px 50px rgba(0,0,0,.55),
      0 0 32px rgba(37,211,102,.85);
  }
}