table {
  border:0;
  border-collapse:collapse;
}
td {
  font-weight:700;
  text-align:center;
  line-height:200%;
  font-size: 150%;
  border:2px solid black;
  width:2em;
  height:2em
}
td.fill {
  background-color:black;
}
##</code><code>##

.outer {

margin-left : auto;
margin-right : auto;
clear: left;
margin-top: .7em;
margin-bottom: .7em;
max-width:25%;
display:block;

}