.whatsapp-float {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 90;
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #25D366;
  color: #ffffff;
  border-radius: 50%;
  box-shadow: 0 4px 20px rgba(37, 211, 102, 0.45);
  text-decoration: none;
  transition: transform .2s, box-shadow .2s, opacity .2s;
}

.whatsapp-float svg {
  width: 28px;
  height: 28px;
  fill: currentColor;
}

.whatsapp-float:hover {
  transform: scale(1.06);
  box-shadow: 0 6px 28px rgba(37, 211, 102, 0.55);
}

.whatsapp-float:active {
  transform: scale(0.96);
}

@media (max-width: 768px) {
  .whatsapp-float {
    right: 16px;
    bottom: max(16px, env(safe-area-inset-bottom));
    width: 52px;
    height: 52px;
  }

  .whatsapp-float svg {
    width: 26px;
    height: 26px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .whatsapp-float { transition: none; }
  .whatsapp-float:hover { transform: none; }
}