html { height: 100%; }

body {
	background: #f06d06;
	font-size: 80%;
	padding: 20px;
	height: calc(100% - 60px);
}

main {
	background: white;
	height: 100%;
	width: 100%;
	display: flex;
	justify-content: center;
	align-items: center;
	overflow: auto;
}

main>div {
	background: black;
	color: white;
	padding: 20px;
	overflow: auto;
	font-size: 300%;
}

input, button { font-size: 100%; }

a[href] { color: #f06d06; }

.invisible { display: none; }