.whatsapp-float {
    position: fixed;
    bottom: 20px;
    background-color: #25D366;
    color: #FFF;
    border-radius: 50%;
    text-align: center;
    font-size: 30px;
    box-shadow: 2px 2px 3px #999;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    transition: all 0.3s ease;
}
.whatsapp-float:hover {
    background-color: #13fa73;
}
.whatsapp-float img {
    width: 40px;
    height: 40px;
}