body {
	font-family: sans-serif;
	font-size: 100%;
	text-align: center;
}

h1 {
	font-size: 4em;
}

.tables-grid table {
	border-collapse: collapse;
	margin: 4px;
	margin-left: auto;
	margin-right: auto;
}

div.tables-grid th {
	font-weight: bold;
	background-color: #00308f;
	color: #fff;
}

div.tables-grid th, div.tables-grid td {
	border: 1px solid black;
	width: 60px;
	height: 60px;
	font-size: 3em;
}

footer {
	font-size: small;
}