.whatsapp-float{
position:fixed;
bottom:25px;
left:25px;
z-index:9999;
}

.whatsapp-float img{
width:55px;
height:55px;
border-radius:50%;
box-shadow:0 4px 10px rgba(0,0,0,0.3);
transition:transform .3s;
}

.whatsapp-float img:hover{
transform:scale(1.1);
}