.whatsapp-button {
  position: fixed;
  bottom: 25px;
  right: 20px;
  background-color: #25d366;
  color: #fff;
  font-weight: bold;
  font-size: 1rem;
  width: 90px;
  height: 90px;
  border-radius: 50%;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 10px;
  animation: pulse-strong 1.5s infinite;
  box-shadow: 0 0 0 0 rgba(37, 211, 102, 0.6);
  cursor: pointer;
  line-height: 1.1;
  user-select: none;
}
.whatsapp-button:hover {
  transform: scale(1.1);
  background-color: #1ebe5d;
}

.whatsapp-button span {
  display: block;
  white-space: nowrap;
}

@keyframes pulse-strong {
  0% {
    box-shadow: 0 0 0 0 rgba(37, 211, 102, 0.7);
  }
  50% {
    box-shadow: 0 0 0 20px rgba(37, 211, 102, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(37, 211, 102, 0);
  }