* {
	box-sizing: border-box;
}

body {
	background-color: black;
	padding: 0;
	color: blanchedalmond;
	font-size: 1.2em;
}

input {
	max-width: 80px;
	font-size: 1.2em;
	background-color: black;
	border: 1px solid wheat;
	color: wheat;
}

button {
	font-size: 1.2em;
}

.number {
	display: inline-block;
	width: 70px;
	height: 70px;
	text-align: center;
	padding-top: 12px;
	margin: 5px;
	border-radius: 35px;
	font-size: 1.2em;
	line-height: 40px;
	font-family: Helvetica, sans-serif;
}

.active {
	cursor: pointer;
	border: 2px yellowgreen solid;
}

.inactive {
	cursor: not-allowed;
	border: 2px gray solid;
	color: gray;
}

canvas {
	position: absolute;
	left: 0;
	top: 0;
	display: none;
}