screen.css

/* https://screencss.com/ */

/* 6 (0.375), 7 (0.4375), 8 (0.5), 9 (0.5625), 10 (0.625), 11 (0.6875), 12 (0.75), 14 (0.875),
16 (1), 18 (1.125), 21 (1.3125), 24 (1.5), 36 (2.25), 48 (3), 60 (3.75), 72 (4.5)  px (em) */

@import url('https://meyerweb.com/eric/tools/css/reset/reset.css');
@import url('https://rsms.me/inter/inter-ui.css');
@import url('https://fonts.googleapis.com/css?family=Roboto+Mono:400,500,700');

html {
	background-color: #fff;
}

body {
	font-size: 87.5%; /* 14px */
	*font-size: small;
	color: #111;
	font-family: 'Inter UI', sans-serif;
	font-size-adjust: none;
	font-style: normal;
	font-variant: normal;
	font-weight: normal;
	line-height: 21px;
	max-width: 720px;
	margin: 42px auto;
}

html > body {
	font-size: 14px;
}

a {
	color: #007bff;
	text-decoration: none;
	border-bottom: 1px solid;
}

a.inherit {
	color: inherit;
}

a:hover,
a.quiet:hover,
.quiet a:hover {
	color: #0062cc;
}

h1,
.h1 {
	font-size: 36px;
	line-height: 42px;
	font-weight: 700;
	text-align: center;
}

h2,
.h2 {
	text-align: center;
	font-size: 18px;
	line-height: 24px;
}

h3,
.h3 {
	font-size: 18px;
	font-weight: 700;
	margin: 42px 0 21px 0;
}

h4,
.h4 {
	font-size: 16px;
	line-height: 21px;
}

p,
.p {
	margin: 10px 0 11px 0;
}

.br {
	margin: 21px 0;
}

s,
.s,
del,
.del {
	text-decoration: line-through;
}

sub,
.sub {
	vertical-align: sub;
}

sup,
.sup {
	vertical-align: super
}

b,
.b,
strong,
.strong {
	font-weight: 600;
}

i,
.i,
em,
.em {
	font-style: italic;
}

img,
iframe {
	margin: 0 auto;
	display: block;
	max-width: 100%;
}

small,
.small {
	font-size: 12px;
	line-height: 18px;
}

code,
.code {
	font-family: 'Roboto Mono', monospace;
	background-color: #ddd;
	border-radius: 3px;
	padding: 1px 4px;
}

.center {
	text-align: center;
}

.quiet,
a.quiet,
.quiet a {
	color: #999;
}

hr,
.hr {
	border: 0;
	background-color: #ccc;
	height: 1px;
	margin: 21px 0;
}

li {
	margin-left: 20px;
	list-style-type: disc;
	list-style-position: initial;
}

table {
	width: 100%;
	text-align: left;
}

table th {
	font-weight: 600;
}

table th,
table td {
	padding: 5px 0;
	border-bottom: 1px solid #ccc;
}

blockquote,
.blockquote {
	margin: 21px;
	font-style: italic;
}

blockquote p,
.blockquote p {
	/* HACK */
	margin: 0;
	display: inline;
}

blockquote:before,
.blockquote:before {
	content: '\201C';
}

blockquote:after,
.blockquote:after {
	content: '\201D';
}

.break {
	display: none;
}

@media screen and (max-width: 762px) {
	/* 720 + (21 * 2) */

	body {
		margin: 21px;
	}

	.break {
		display: inline;
	}
}