.whatsapp-fab{position:fixed;right:20px;bottom:20px;z-index:9999;background:#25D366;color:#fff;border-radius:50px;width:56px;height:56px;display:flex;align-items:center;justify-content:center;box-shadow:0 8px 24px rgba(0,0,0,.15);text-decoration:none;font-size:1.6rem}
.whatsapp-fab:hover{transform:translateY(-1px);color:#fff}