.whatsapp-float {
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 9999;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, #25D366, #128C7E);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 3px 12px rgba(37,211,102,0.3);
  transition: all 0.25s cubic-bezier(0.4,0,0.2,1);
  text-decoration: none;
}
.whatsapp-float:hover {
  transform: translateY(-3px) scale(1.05);
  box-shadow: 0 6px 20px rgba(37,211,102,0.45);
}
.whatsapp-float svg { width: 22px; height: 22px; fill: white; }
.whatsapp-tooltip {
  position: absolute;
  right: calc(100% + 10px);
  top: 50%;
  transform: translateY(-50%);
  background: #0F2239;
  color: #c5cdd8;
  padding: 4px 10px;
  border-radius: 4px;
  font-size: 11px;
  white-space: nowrap;
  opacity: 0;
  transition: opacity 0.2s;
  pointer-events: none;
}
.whatsapp-tooltip::after {
  content: '';
  position: absolute;
  right: -4px;
  top: 50%;
  transform: translateY(-50%);
  border: 4px solid transparent;
  border-left-color: #0F2239;
}
.whatsapp-float:hover .whatsapp-tooltip { opacity: 1; }
@media (max-width: 768px) {
  .whatsapp-float { width: 40px; height: 40px; bottom: 16px; right: 16px; }
  .whatsapp-float svg { width: 20px; height: 20px; }
  .whatsapp-tooltip { display: none; }
}