.btn-wsp{
    position:fixed;
    width:50px;
    height:50px;
    line-height:50px;
    margin:auto; 
    top:3px;
    left:47%;
    background:none;
    color:#fc024e;
    border-radius:50px;
    text-align:center;
    font-size:37px;
    /*box-shadow: 0px 1px 10px rgba(0,0,0,0.3);*/
    z-index:100;
    transition: all 300ms ease;
}

.btn-wsp:hover {
    background: #eceded;
    color:#25d366;
}


@media only screen and (min-width:320px) and (max-width:768px) {
.btn-wsp {
    width:50px;
    height:50px;
    line-height: 50px;
}
}