bingo/style.css

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

table {
  width: 100%;
}

td {
  text-align: center;
  height: 100px;

  font-size: 200%;
  font-family: Arial, Helvetica, sans-serif;
}

img {
  width: 100%;
}

h1, p {
  font-family: Arial, Helvetica, sans-serif;
  text-align: center;
  margin: 5px;
}