body {
    text-align: center;
    color: inherit;
    background-color: #FFF;
}

img {
    border: none;
}

h1 {
    font: 30px sans-serif;
}

p {
    font: 12px sans-serif;
}

a {
    text-decoration: none;
    color: #00F;
    background-color: inherit;
}

table {
    width: 100%;
}

td {
    width: 170px;
    height: 170px;
    text-align:center;
    vertical-align:middle;
    font-size:10px;
    border: solid 1px black;
    color: inherit;
    background-color: #EEE;
}

td.empty {
    width: 170px;
    height: 50px;
    border: none;
    color: inherit;
    background-color: #FFF;
}

.center {
    width: 690px;
    margin-left: auto;
    margin-right: auto;
    text-align: justify;
}