.whatsapp-float {
  position: fixed; bottom: 24px; right: 24px; z-index: 999;
  width: 56px; height: 56px; border-radius: 50%;
  background: #25d366;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 4px 20px rgba(37, 211, 102, 0.4);
  transition: all 0.3s; cursor: pointer; border: none;
  color: #fff; font-size: 1.6rem;
  animation: whatsapp-pulse 2s infinite;
}
.whatsapp-float:hover {
  transform: scale(1.1); box-shadow: 0 6px 28px rgba(37, 211, 102, 0.55);
}
@keyframes whatsapp-pulse {
  0% { box-shadow: 0 4px 20px rgba(37, 211, 102, 0.4); }
  50% { box-shadow: 0 4px 28px rgba(37, 211, 102, 0.65); }
  100% { box-shadow: 0 4px 20px rgba(37, 211, 102, 0.4); }
}