.whatsapp-float { position: fixed; bottom: 80px; right: 24px; z-index: 9999; border-radius: 50%; width: 70px; height: 70px; display: flex; align-items: center; justify-content: center; box-shadow: 0 2px 8px rgba(0,0,0,0.2); transition: box-shadow 0.2s; } 
.whatsapp-float:hover { box-shadow: 0 4px 16px rgba(0,0,0,0.3); background: #20ba5a; }