.mydiv{
    padding:10px;
}

.gen_btn{

    padding:10px;
    background-color:white;
    color:black;
    font-family:arial;
    font-size:15px;
    border:2px solid black;
}

.gen_btn:hover{
    background-color:#9a64ff;
    font-size:  1.3em;
    padding: 10px;
    border: 4px solid orange;
}