html,
body {
	margin: 0;
	padding: 0;
	height: 100%;
	font-family: Arial, sans-serif;
	font-size: 15px;
	line-height: 1.2;
	display: flex;
	flex-direction: column;
	align-items: center;
}

header, footer {
	padding: 1rem;
}

main {
	padding: 1rem;
}