Simple just read! (chrome extension) theme. Uses no external fonts or resources.

just-read-dark-system-fonts.css

* {
	-webkit-box-sizing: border-box;
	box-sizing: border-box;
}

body {
	font-family: Georgia,Cambria,"Times New Roman",Times,serif;
	line-height: 1.75em;
	font-size: 16px;
	background-color: #212324;
	color: #ddd;
}

.simple-container {
	max-width: 675px;
	margin: 0 auto;
	padding-top: 70px;
	padding-bottom: 20px;
}

p {
	color: #ddd;
	font-size: 16px;
}

h1,
h2 {
	font-family: -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Oxygen,Ubuntu,Cantarell,"Open Sans","Helvetica Neue",sans-serif;
	color: #ddd;
}

h1 {
	font-size: 30px;
	line-height: 34px;
}

h2 {
	font-size: 20px;
	line-height: 25px;
}

h3 {
	font-family: 'Merriweather', serif;
	font-size: 16px;
	color: #ddd;
	line-height: 27px;
	padding-top: 15px;
	padding-bottom: 15px;
	border-bottom: 1px solid #666;
	border-top: 1px solid #666;
}

hr {
	height: 1px;
	background-color: #666;
	border: none;
	width: 100%;
	margin: 0px;
}

a[href] {
	color: #27AAE1;
}

a[href]:hover {
	color: #4ECAFF;
}

img {
	max-width: 100%;
}

li {
	line-height: 1.5em;
}

aside,
[class *= "sidebar"],
[id *= "sidebar"] {
	max-width: 90%;
    margin: 0 auto;
    border: 1px solid lightgrey;
    padding: 5px 15px;
}

.simple-date {
	display: inline-block;
	font-family: -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Oxygen,Ubuntu,Cantarell,"Open Sans","Helvetica Neue",sans-serif;
	font-size: 18px;
	color: #ddd;
	padding-right: 15px;
	padding-top: 10px;
	padding-bottom: 10px;
	border-right: 1px solid #666;
}

.simple-author {
	display: inline-block;
	font-family: -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Oxygen,Ubuntu,Cantarell,"Open Sans","Helvetica Neue",sans-serif;
	font-size: 18px;
	color: #ddd;
	line-height: 22px;
	padding-left: 10px;
	padding-top: 10px;
	padding-bottom: 10px;
}

.simple-close {
	position: fixed;
	top: 10px;
	right: 8px;
	font-size: 25px;

	background: none;
	border: 1px solid #ddd;
	color: #ddd;
	-webkit-transition: .3s;
	transition: .3s;
}
.simple-close:hover {
	border: 1px solid #ddd;
	color: #ddd;
}

.simple-close {
	color: #666;
	border-color: #666;
}

.simple-print {
	fill: #666;
}
.simple-print:hover {
	fill: #ddd;
}

.simple-ext-info {
	text-align: center;
}

@media (max-width: 750px) {
	.simple-container {
		padding-left: 50px;
		padding-right: 50px;
	}
}

@media (max-width: 450px) {
	.simple-container {
		padding-top: 30px;
		padding-left: 20px;
		padding-right: 20px;
	}
}

@media (min-width: 1921px) {
	body {
		font-size: 18px;
	}
}


/* Hide some things I dislike seeing when I read articles */
/* Very simple ad hider */
[class = "ad"],
[class ^= "ad-"],
[class ^= "ad_"],
[class *= "-ad-"],
[class $= "-ad"],
[class $= "_ad"],
[class ~= "ad"],
[id = "ad"],
[id ^= "ad-"],
[id ^= "ad_"],
[id *= "-ad-"],
[id $= "-ad"],
[id $= "_ad"],
[id ~= "ad"] {
    display: none;
}

/* Very simple sharing hider */
[class *= "share"],
[class *= "sharing"],
[class *= "social"],
[id *= "share"],
[id *= "sharing"],
[id *= "social"] {
    display: none;
}

/* Very simple related hider */
[class *= "meta"]:not(.simple-meta),
[id *= "meta"] {
    display: none;
}

/* Very simple related hider */
[class *= "related"],
[id *= "related"] {
    display: none;
}

/* Very simple comments hider */
[class *= "comment"],
[id *= "comment"] {
    display: none;
}

/* Very simple tags hider */
[class ^= "tag"],
[class *= "-tag-"],
[class $= "-tag"],
[class $= "_tag"],
[class ~= "tag"],
[id ^= "tag"],
[id *= "-tag-"],
[id $= "-tag"],
[id $= "_tag"],
[id ~= "tag"],
[class *= "-tags-"],
[class $= "-tags"],
[class $= "_tags"],
[class ~= "tags"],
[id *= "-tags-"],
[id $= "-tags"],
[id $= "_tags"],
[id ~= "tags"] {
    display: none;
}

/* Very simple fav/favorites hider */
[class ^= "fav"],
[class *= "-fav-"],
[class $= "-fav"],
[class $= "_fav"],
[class ~= "fav"],
[id ^= "fav"],
[id *= "-fav-"],
[id $= "-fav"],
[id $= "_fav"],
[id ~= "fav"],
[class *= "favorites"],
[id *= "favorites"] {
    display: none;
}

/* Very simple signup/signin hider */
[class *= "signup"],
[id *= "signup"],
[class *= "signin"],
[id *= "signin"],
[class *= "signIn"],
[id *= "signIn"] {
	display: none;
}

/* Very simple footer hider */
footer,
[class *= "footer"],
[id *= "footer"] {
	display: none;
}


/* Hide SVGs that use particular site names (usually icons) */
svg[class *= "pinterest"],
[class *= "pinterest"] svg,
svg[id *= "pinterest"],
[id *= "pinterest"] svg,
svg[class *= "facebook"],
[class *= "facebook"] svg,
svg[id *= "facebook"],
[id *= "facebook"] svg,
svg[class *= "github"],
[class *= "github"] svg,
svg[id *= "github"],
[id *= "github"] svg,
svg[class *= "twitter"],
[class *= "twitter"] svg,
svg[id *= "twitter"],
[id *= "twitter"] svg,
svg[class *= "instagram"],
[class *= "instagram"] svg,
svg[id *= "instagram"],
[id *= "instagram"] svg,
svg[class *= "tumblr"],
[class *= "tumblr"] svg,
svg[id *= "tumblr"],
[id *= "tumblr"] svg,
svg[class *= "youtube"],
[class *= "youtube"] svg,
svg[id *= "youtube"],
[id *= "youtube"] svg,
svg[class *= "codepen"],
[class *= "codepen"] svg,
svg[id *= "codepen"],
[id *= "codepen"] svg,
svg[class *= "dribble"],
[class *= "dribble"] svg,
svg[id *= "dribble"],
[id *= "dribble"] svg,
svg[class *= "soundcloud"],
[class *= "soundcloud"] svg,
svg[id *= "soundcloud"],
[id *= "soundcloud"] svg,
svg[class *= "rss"],
[class *= "rss"] svg,
svg[id *= "rss"],
[id *= "rss"] svg,
svg[class *= "linkedin"],
[class *= "linkedin"] svg,
svg[id *= "linkedin"],
[id *= "linkedin"] svg,
svg[class *= "vimeo"],
[class *= "vimeo"] svg,
svg[id *= "vimeo"],
[id *= "vimeo"] svg,
svg[class *= "email"],
[class *= "email"] svg,
svg[id *= "email"],
[id *= "email"] svg {
	display: none;
}