body {
  text-align: center;
}

th, td {
    border: 1px solid black;
}

table {
  border-collapse: collapse;
  caption-side: top;
  empty-cells: show;
  margin: auto;
}

caption {
  padding: 0.25em;
}

tr,
td {
  border-style: solid;
  border-width: 1px;
  padding: 0.5em;
  text-align: center;
  vertical-align: middle;
  height: 40px;
  width: 50px;
}