.btn-wats{
    position: fixed;
    width: 55px;
    height: 55px;
    line-height: 40px;
    bottom: 30px;
    right: 30px;
    background: #0df053;
    color: #fff;
    border-radius: 25px;
    text-align: center;
    font-size: 40px;
    box-shadow: 0px 1px 10px rgba(0, 0, 0,0.3);
    z-index: 100;
}