table {
    border-collapse: collapse;
    margin: 20px auto;
}

td {
    width: 50px;
    height: 50px;
    border: 1px solid black;
    padding: 0;
    margin: 0;
}

#startBtn {
    display: block;
    margin: 20px auto;
    padding: 10px 20px;
    font-size: 16px;
}

#loadBtn {
    display: block;
    margin: 20px auto;
    padding: 10px 20px;
    font-size: 16px;
}

#updateBtn {
    display: block;
    margin: 20px auto;
    padding: 10px 20px;
    font-size: 16px;
}

.tableButton {
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0;
    border: none;
    display: block;
    font-size: 30px;
}