.whatsapp-float {
  position: fixed;
  right: max(1.25rem, env(safe-area-inset-right, 1.25rem));
  bottom: max(1.25rem, env(safe-area-inset-bottom, 1.25rem));
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 3.5rem;
  height: 3.5rem;
  border-radius: 9999px;
  background-color: #25d366;
  color: #fff;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.25);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.whatsapp-float:hover {
  transform: scale(1.06);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
  color: #fff;
}

.whatsapp-float:focus-visible {
  outline: 2px solid #fff;
  outline-offset: 3px;
}

@media (max-width: 640px) {
  .whatsapp-float {
    right: max(1rem, env(safe-area-inset-right, 1rem));
    bottom: max(1rem, env(safe-area-inset-bottom, 1rem));
    width: 3.25rem;
    height: 3.25rem;
  }
}