.tile{
    width:70px;
    height:70px;
    border:1px solid blue;
    border-radius:10px;
    text-align:center;
    font-size:36px;
    background-color:white;
    box-shadow:rgb(128,128,128) 5px,5px;
}

td:hover {
    color:blue;
    background-color: skyblue;
    cursor:pointer;
}