.whatsapp-float {
    position: fixed;
    width: 60px;
    height: 60px;
    bottom: 20px;
    right: 20px;
    z-index: 999;
    background-color: #25D366;
    border-radius: 50%;
    text-align: center;
    box-shadow: 2px 2px 5px rgba(0,0,0,0.3);
}

    .whatsapp-float img {
        margin-top: 6px;
        width: 40px;
        height: 40px;
    }