table.grid {
    border-collapse: collapse;
}
td {
    background: #444;
    color: #ccc;
    border: 1px #ccc solid;
    width: 20px;
    height: 20px;
    text-align: center;
    color: #5ff;
    font-size: 11px;
    font-family: sans-serif;
}
td.selected {
    background-color: #a80;
}