table {
	width: 100%;
	margin: auto;
	line-height: 2em;
}

table tr td {
	border-style: solid;
	border-color: black;
	border-width: 0.1em;
	text-align: center;
	padding: 2px;
}

th {
	background-color: gray;
}

table tr:nth-child(even) {
	background-color: darkgray;
}

button {
	font-size: 1em;
}

body {
	display: flex;
	align-items: center;
	justify-content: space-around;
}

div {
	background-color: lightgray;
	padding: 10px;
	text-align: center;
}