body {
    background-image: url("stars.gif");
}

div#body {
    background: #eee;
    padding: 10px;
    float: middle;
    display: table;
    margin: 0 auto;
}

table.center {
    margin-left: auto;
    margin-right: auto;
}

th {
    border: 2px;
    border-color: darkgray;
    border-style: solid;
    padding: 2px;
}

div.center {
    text-align: center;
    align: center;
}