.whatsapp-float {
  position: fixed;
  bottom: 20px;
  right: 20px;
  width: 56px;
  height: 56px;
  background-color: #25d366;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 28px;
  z-index: 9999;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
}

/* O efeito de onda */
.whatsapp-float::before {
  content: "";
  position: absolute;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.4);
  animation: whatsapp-pulse 3.5s infinite;
  z-index: -1;
}

@keyframes whatsapp-pulse {
  0% {
    transform: scale(1);
    opacity: 0.6;
  }
  70% {
    transform: scale(1.8);
    opacity: 0;
  }
  100% {
    opacity: 0;
  }
}