.whatsapp-float{position:fixed;right:20px;bottom:20px;width:56px;height:56px;background:#25D366;color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;box-shadow:0 6px 18px rgba(37,211,102,0.25);z-index:99999;transition:transform .15s ease,box-shadow .15s ease;text-decoration:none}
.whatsapp-float i{font-size:22px}
.whatsapp-float:hover{transform:translateY(-4px);box-shadow:0 10px 24px rgba(37,211,102,0.28)}
@media (max-width:640px){.whatsapp-float{right:16px;bottom:16px;width:50px;height:50px}}