.matrix-table {
  width: auto;
  border-collapse: collapse;
  margin: 0.5em;
  display: inline-table;
  font-size: 0.95em;
}

.matrix-table td {
  border: 1px solid #444;
  padding: 0.25em 0.5em;
  text-align: center;
  min-width: 1.5em;
}

.matrix-table tr:first-child td {
  font-weight: bold;
}

.matrix-table td:first-child {
  font-weight: bold;
}