body {
    text-align: center;
    font-family: 'Lucida Sans', 'Lucida Sans Regular', 'Lucida Grande', 'Lucida Sans Unicode', Geneva, Verdana, sans-serif;
}

table#bingo {
    text-align: center;
}

table#bingo td {
    width: 128px;
    height: 128px;
    border: 1px solid black;
    text-align: center;
    margin: 0px;
}

table#bingo td.checked {
    background-color: darkolivegreen;
    color: white;
}

table img {
    width: 128px;
    height: 128px;
}

.container {
    text-align: center;
}

.container > div {
    display: inline-block;
}