.btn-wsp{
    position:
    fixed;
    width: 60px;
    height: 60px;
    line-height: 60px;
    bottom: 20px;
    right: 20px;
    background:#25d366;
    color:#FFF;
    border-radius:50px;
    text-align: center;
    font-size: 34px;
    z-index:100;
    transition: all 300ms ease;
}
.btn-wsp:hover{
    background: #15a349;
}

.fa.fa-whatsapp {
    font-family: "Font Awesome 5 Brands";
    font-weight: 400;
    color: #FFF;
}

@media only screen and (min-width:320px) and (max-width:768px){
    .btn-wsp{
        width: 60px;
        height: 60px;
        line-height: 60px;
 }
}