html {
	background-color: #fff;

	scroll-behavior: smooth;
}
body {
	color: #000;
	font-family: "Courier", monospace;

	background-color: #f2f2f2;
	border-radius: 1em;
	box-shadow: 0 10px 16px 0 #636363;

	max-width: 64em;

	margin: auto;
	padding: 2em;
}
button {
	color: #fff;
	font-family: "Courier", monospace;

	background-color: #0d0d0d;
}
li {
	margin: 5px 0;
}
a {
	color: #227;
}

#scroll_to_top {
	position: fixed;

	bottom: 30px;
	right: 50px;

	color: #000;

	background-color: #ddd;

	border: 3px solid #bbb;
	border-radius: 5px;

	padding: 8px;
}
#scroll_to_top:hover {
	box-shadow: 0 5px 8px 0 #ccc;
}
#scroll_to_top:active {
	background-color: #ccc;
}