:root {
	--background-color: #111;
	--border-color: #222;
	--text-color: #fb5;
	--link-color: #f70;
	--link-highlight-color: #f20;
	--header-color: #ccc;
}
body {
  background-color: var(--background-color);
  color: var(--text-color);
	display: block;
}
@media screen and (min-width: 800px) {
	body {
		width: 800px;
	}
}
@media screen and (min-width: 1000px) {
	body {
		margin: auto;
		display: grid;
		width: 1000px;
		grid-template-columns: 200px auto 200px;
		grid-template-areas:
			'head head head'
			'nav main .'
			'foot foot foot';
	}
	body > header {
		grid-area: head;
	}
	body > nav {
		grid-area: nav;
		position: sticky;
		top: 0;
		height: min-content;
	}
	body > main {
		grid-area: main;
	}
	body > footer {
		grid-area: foot;
	}
}
h1, h2, h3, h4, h5, h6 {
  color: var(--header-color);
}
body > header {
	text-align: center;
}
a {
  color: var(--link-color);
  font-weight: bold;
}
a:hover {
  color: var(--link-highlight-color);
}

img {
	max-width: 100%;
}
.icon {
  background-color: #aaa;
  padding: 5px;
	width: 64px;
	height: 64px;
}
pre {
	background-color: var(--border-color);
	color: var(--header-color);
	max-width: min-content;
	padding: 20px;
	border-radius: 5px;
}
footer {
	margin: 20px 0px 200px 0px;
	text-align: center;
}