.whatsapp-float {
  position: fixed; bottom: 30px; right: 30px; width: 60px; height: 60px;
  background-color: #25d366; color: #ffffff; border-radius: 50%;
  display: flex; align-items: center; justify-content: center; font-size: 35px;
  box-shadow: 2px 2px 15px rgba(0, 0, 0, 0.15); z-index: 1050; text-decoration: none;
  transition: all 0.3s ease; animation: pulse-wa 2s infinite;
}
.whatsapp-float:hover {
  background-color: #128C7E; color: #ffffff; transform: scale(1.1);
  box-shadow: 2px 2px 20px rgba(37, 211, 102, 0.4); animation: none;
}
@keyframes pulse-wa {
  0% { box-shadow: 0 0 0 0 rgba(37, 211, 102, 0.6); }
  70% { box-shadow: 0 0 0 15px rgba(37, 211, 102, 0); }
  100% { box-shadow: 0 0 0 0 rgba(37, 211, 102, 0); }
}
@media (max-width: 768px) {
  .whatsapp-float { bottom: 20px; right: 20px; width: 55px; height: 55px; font-size: 30px; }
}