table {
    border-collapse: collapse;
}

th {
    padding: 5px;
    border: 1px solid #333;
}

td {
    padding: 5px;
    border: 1px solid #333;
    text-align: center;
}

td > span {
    font-size: 0.5em;
    color: gray;
    display: block;
}