body {
	margin: 0;
	padding: 0;
	font-family: sans-serif;
	display: flex;
	flex-direction: column;
	justify-content: center;
	align-items: center;
	height: 100vh;
}

* {
	box-sizing: border-box;
}

td {
	text-align: center;
	font-size: 14px;
	padding: 5px 8px;
	white-space: nowrap;
}

td:hover {
	background: #c0c0c0c9;
}

#numLeftInput,
#numTopInput,
#rowsInput {
	border: 1px solid;
}

th {
	padding: 5px 8px;
}

th:first-child {
	max-width: 50px;
	height: 20px;
}

td,
th {
	box-sizing: border-box;
}

td.danger {
	background: darkred;
	color: #fff;
}

tr:hover,
.selected {
	background: #c0c0c081;
}

.counter-wrapper {
	text-align: center;
	font-size: 20px;
	margin-bottom: 30px;
}