lesson.css

body {
	font-family: 'Open Sans', sans-serif;
}

section {
	margin: 5em 0 0;
	clear: both;
}

section.side-by-side > * {
	width: 50%;
}
section.side-by-side article {
	padding: 0 2em;
}

article.hero {
	margin: 0 auto;
	height: 100%;
	width: 100%;
	text-align: center;
}

article.solo {
	width: 60%;
	max-width: 30em;
	margin: 0 auto;
}

article img {
	max-width: 100%;
}
article footer {
	margin-top: 2em;
	text-align: center;
}

.game.right {
	border: 0;
	position: sticky;
	top: 0;
	float: right;
	height: 100vh;
	overflow: hidden;
	display: block;
	image-rendering: optimizeSpeed;
	image-rendering: -moz-crisp-edges;
	image-rendering: -o-crisp-edges;
	image-rendering: -webkit-optimize-contrast;
	image-rendering: optimize-contrast;
	image-rendering: crisp-edges;
	image-rendering: pixelated;
	-ms-interpolation-mode: nearest-neighbor;
}

code {
	background: #eee;
	padding: 0.2em 0.5em;
	white-space: nowrap;
}

code.command {
	/* background: #00127C; */
	/* color: #f3f30f; */
	background: #eee;
	padding: 0.2em 0.5em;
}

p {
	line-height: 1.4;
}

pre {
	background: #eee;
	padding: 0.5em 0.5em;
}

h1 {
	font-size: 180%;
}

aside {
	border: 1px solid yellow;
	background: lightyellow;
	padding: 1em;
	width: 60%;
	margin: 0 auto;
}

article footer button, article footer .button {
	font-size: 120%;
}

article.hero footer button, article.hero footer .button {
	font-size: 200%;
}

a.button, a.button:active, a.button:visited {
	color: #333;
	text-decoration: none;
	border: 1px solid #333;
	border-radius: 14px;
	padding: 0.15em 0.6em;
	display: inline-block;
}

a.button:active {
	background-color: black;
	color: white;
}