button#btn {
   display:none;
}
@media only screen and (min-width:1024px){
    button#btn {
    width: 150px;
    margin: 0 auto;
    display: block;
    padding: 5px;
    font-size: 1em;
    border-radius: 10px;
    position: absolute;
    bottom: 60px;
    left: 50%;
    transform: translate(-50%, -50%);
}
}