body {
    font-family: "Helvetica", sans-serif;
}

table {
    /*width: 400px;*/
}

tr {

}

td {
    width: 30px !important;
    height: 30px !important;
    text-align: center;
    color: black;
    border: 1px solid black;
}

.red {
    background-color: red;
}

.green {
    background-color: lime;
}