html {
	background-color: lightgray;
}

body {
	width: 960px;
	border: 1px solid gray;
	margin-left: auto;
	padding: 1em;
	background-color: white;
	margin-right: auto;
	margin-top: 1em;
}

table, td, tr, th {
	border: 1px solid black;
}
table {
	border-collapse: collapse;
}
th, td {
	padding: 0.5em;
}