HelvetiNews - A Minimalist Theme for HackerNews from http://www.helvetinews.com/

HelvetiNews.user.js

// ==UserScript==
// @name         HelvetiNews
// @namespace    http://tampermonkey.net/
// @version      0.2
// @description  A Minimalist Theme for HackerNews
// @author       dwynings
// @match        https://news.ycombinator.com/*
// @downloadURL  https://gist.githubusercontent.com/cllu/276fb0cd574006f4f343ef1515dac5ce/raw/HelvetiNews.user.js
// @resource     styles  https://gist.githubusercontent.com/cllu/276fb0cd574006f4f343ef1515dac5ce/raw/hn.css
// @grant        GM_addStyle
// @grant        GM_getResourceText
// ==/UserScript==

(function() {
    'use strict';
    GM_addStyle (GM_getResourceText ("styles"));
})();

hn.css

body {
	font: 14px/21px "HelveticaNeue", "Helvetica Neue", Helvetica, Arial, sans-serif !important;
	color: #444 !important;
	-webkit-font-smoothing: antialiased;
	-webkit-text-size-adjust: 100%;
	/*background: #F8F7F3;*/
	background: #F9F9F9;
	color: #828282;
	margin: 0;
}

body > center > table {
	width: 100%;
	background-color: transparent;
	/*background: red;*/

}

body > center > table > tbody > tr:first-child > td {
	background: white;
	position: absolute;
	width: 100%;
	height: 45px;
	border-bottom: 4px solid #fc7010;
	z-index: 2;
}

body > center > table > tbody > tr:first-child a[href="http://ycombinator.com"] {
	display: none;
}

body > center > table > tbody > tr:first-child > td > table {
	padding: 10px;
	margin: 0 auto;
	width: 960px;
}

.pagetop {
	font-family: "Helvetica Neue", Arial, Helvetica, Geneva, sans-serif !important;
	font-size: 14px;
	display: block;
	margin-top: 11px;
	margin-left: 150px;
	height: 40px;
	color: white !important;
}

.pagetop a {
	padding: 4px;
	display: inline-block;
	font-family: "Helvetica Neue", Arial, Helvetica, Geneva, sans-serif;
	font-size: 14px;
	line-height: 16px;
	color: #333 !important;
}

.pagetop b {
	padding: 4px;
	color: #3d3a32 !important;
	font: bold 26px "Helvetica Neue", Arial, Helvetica, Geneva, sans-serif !important;
	position: absolute;
	top: 4px;
	margin-left: -195px;
	display: block;
}

.pagetop a[href="news"] {
	min-width: 170px;
	padding-right: 0px;
	color: #3d3a32 !important;
	font: bold 26px "Helvetica Neue", Arial, Helvetica, Geneva, sans-serif !important;
	position: absolute;
	top: 0px;
}

.topsel a:link, .topsel a:visited {
	color: #fc7010 !important;
	font-weight: bold;
}

.subtext a[href^="item?id="] {
	font-weight: bold;
	color: #5e5e5e;
}

.comhead a:link, .subtext a:visited, .subtext a:link, tr:hover > .title {
	color: #828282 !important;
}

body > center > table > tbody > tr:nth-child(3) > td {
	padding: 30px 0;
}

body > center > table > tbody > tr:nth-child(3) > td > table {
	width: 960px;
	margin: 0 auto;
	margin-top: 25px;
}

.title {
	font-family: "Helvetica Neue", Arial, Helvetica, Geneva, sans-serif !important;
	font-size: 14px !important;
	color: #cdcdcd !important;
	/*font-weight: 500;*/
	font-weight: bold;

	transition: all .3s linear;
	-o-transition: all .3s linear;
	-moz-transition: all .3s linear;
	-webkit-transition: all .3s linear;
}

.title a:link {
	color: #414141;
}

.title a:visited {
	color: #8b8b8b;
}

body > center > table > tbody > tr:nth-child(3) > td > table > tbody > tr:first-child > td:nth-child(2).title > a {
	font-size: 18px;
}

body > center > table > tbody > tr:nth-child(3) > td > table > tbody > tr:first-child > td:nth-child(2).title > a:visited {
	color: #414141;
}

.subtext {
	font-family: "Helvetica Neue", Arial, Helvetica, Geneva, sans-serif !important;
	font-size: 12px !important;
	color: #444 !important;

	/*padding-bottom: 10px;*/
	padding-bottom: 4px;
	/*padding-top: 2px;*/
}

td, .default, .comhead, .yclinks, .dead, .comhead a {
	font-family: "Helvetica Neue", Arial, Helvetica, Geneva, sans-serif !important;
	font-size: 13px !important;
	color: #444 !important;
	font-weight: normal;
}

.comment {
	font-family: "Helvetica Neue", Arial, Helvetica, Geneva, sans-serif !important;
	font-size: 14px !important;
	color: #222 !important;
	font-weight: normal;
	line-height: 1.54em;
}

.comment font {
	color: #222;
}

/*.default, */

.comment {
	display: block;
	width: 550px;
}

.comhead a:link, .subtext a:visited {
	color: #828282 !important;
	text-decoration: none !important;
}

body > center > table > tbody > tr:nth-child(3) > td > form, body > center > table > tbody > tr > td > table {
	width: 960px;
	margin: 0 auto;
}

.default u {
	text-decoration: none;
}

.default, .default a {
	border-bottom: none;
	

/*

font-size: 13px;*/
	font-size: 14px;
	color: #777;
	text-decoration: none !important;
}

.default .comhead a {
	font-size: 13px;
}

.comment p font a, .comment p font a:link, .comment a:visited, .comment a:link {
	text-decoration: none;
	border-bottom: 1px dashed #777;
	transition: none;
	-o-transition: none;
	-moz-transition: none;
	-webkit-transition: none;
}

.comment p font a:hover, .comment p a:hover, .comment font a:hover {
	border-bottom: 1px solid #fc7010;
}

a[href^=reply] {
	border-bottom: 1px dashed #777;
	transition: none;
	-o-transition: none;
	-moz-transition: none;
	-webkit-transition: none;
	font-weight: bold;
	font-size: 12px;
	color: #777 !important;
}

a[href^=reply]:hover {
	border-bottom: 1px solid #fc7010;
}

.comment p, .comment + p {
	

/*m

argin: 8px 0 0 0;*/
    margin-top: 1em;
}

::selection, ::-webkit-selection, ::-moz-selection {
	background: #fc7010;
	color: #fff;
	text-shadow: none;
}

center a img {
	padding-left: 8px;
	padding-right: 8px;
}

a {
	text-decoration: none;
	transition: color .3s linear;
	-o-transition: color .3s linear;
	-moz-transition: color .3s linear;
	-webkit-transition: color .3s linear;
}

a:hover, .pagetop a:hover, .comhead a:hover, .subtext a:hover, .title a:hover, .topsel a:link, .topsel a:visited, .yclinks a:hover,.pagetop a[href="news"]:hover, td[valign="top"] a[id^="up"]:hover:before, td[valign="top"] a[id^="down"]:hover:before, a[id^="up"]:hover:before, body > center > table > tbody > tr:nth-child(3) > td > table > tbody > tr:first-child > td:nth-child(2).title > a:hover {
	text-decoration: none !important;
	color: #fc7010 !important;
}

.yclinks {
	border-top: 4px solid #fc7010 !important;
	padding-top: 20px;
	height: 100px;
	background: white;
	position: absolute;
	left: 0;
	width: 100%;
	font-family: "Helvetica Neue", Arial, Helvetica, Geneva, sans-serif;
	font-size: 14px !important;
	color: white !important;
}

tbody tr:nth-child(4) center form {
	position: absolute;
	margin-top: 80px;
	margin-left: 95px;

}

tbody tr:nth-child(4) center form input {
	float: right;
	margin-left: 10px;
}

.yclinks a {
	color: #333 !important;
	margin-right: 5px;
	margin-left: 5px;
	padding: 2px 4px;
	margin-left: 2px;
	margin-right: 4px;
}

#hnmain > tbody > tr:nth-child(4) > td > center > br {
	display: none;
}

table td[bgcolor] {
	background: none;
}

body center table tbody tr td form {
	padding-top: 60px;
}

form[method="get"] {
	padding-top: 1px;
}

tbody tr td center font[color] {
	font-size: 30px;
	position: absolute;
	margin-left: -6px;
	line-height: 28px;
	z-index: -2;
}

form {
	z-index: 2;
}

/*td[value="title"] {
	background: red;
}*/

textarea[name="text"] {
	margin-top: -60px;
}

textarea[wrap="virtual"] {
	margin-top: 0px;
}

center table[class^="comment"] a img {
	z-index: -2;
	display: block;
}

a[id^="up"] {
	/*padding: 10px;*/
	width: 30px;
	height: 20px;
	display: inline-block;
	float: left;
	position: relative;
	z-index: 1;
}

a[id^="up"]:before {
	position: absolute;
	left: 14px;
	color: #838383;
	font-size: 14px;
	line-height: 18px;
	

/*font-size: 16px;
	line-height: 21px;*/
	text-align: left;
	content: "\25b2";
}

td[valign="top"] a[id^="up"], a[id^="down"] {
	width: 30px;
	height: 20px;
	display: inline-block;
	float: left;
	position: relative;
	z-index: 1;
}

td[valign="top"] a[id^="up"]:before, td[valign="top"] a[id^="down"]:before {
	position: absolute;
	left: 7px;
	color: #838383;
	font-size: 16px;
	line-height: 21px;
	text-align: right;
}

td[valign="top"] a[id^="up"]:before {
	content: "\25B2";
}

td[valign="top"] a[id^="down"]:before {
	content: "\25BC";
}

td[valign="top"] center {
	width: 30px;
	margin-right: 0px;
}

td[valign="top"] {
	width: 20px;
}

a > img:first-child {
	opacity: 0;
}

table[bgcolor="#ffffaa"] {
	

/*background: red !important;*/
	margin-top: 30px;
}

table[bgcolor="#ffffaa"] .pagetop {
	margin-left: 0px;
	color: #444 !important;
	height: auto !important;
	font-family: "Helvetica Neue", Arial, Helvetica, Geneva, sans-serif !important;
	font-size: 14px !important;
}

table[bgcolor="#ffffaa"] .pagetop a {
	font-size: 14px !important;
	padding: 0px !important;
}

.comhead a[href="user?id=dwynings"], .subtext a[href="user?id=dwynings"] {
	color: #09F!important;
}
.comhead a[href="user?id=dwynings"]:hover, .subtext a[href="user?id=dwynings"]:hover {
	color: #fc7010 !important;
}

td p {
	font-size: 14px !important;
	width: 550px;
	line-height: 1.54em !important;
}

table td:nth-child(3) .pagetop {
	margin-left: 0px;
}

.pagetop font {
	color: #fc7010;
	font-weight: bold;
	font-size: 14px;
}

input[type="text"], input[type="password"],	input[type="email"], textarea,	select {
	border: 1px solid #ccc;
	padding: 6px 4px;
	outline: none;
	font: 13px "HelveticaNeue", "Helvetica Neue", Helvetica, Arial, sans-serif;
	color: #777;
	margin: 0;
	/*max-width: 100%;*/
	display: block;
	background: #fff;
}

textarea {
	color: #222 !important;
	font: 14px "HelveticaNeue", "Helvetica Neue", Helvetica, Arial, sans-serif !important;
	/*min-width: 550px;*/
	line-height: 1.54em !important;

}

select {
	padding: 0;
}

input[type="text"]:focus,
	input[type="password"]:focus,
	input[type="email"]:focus,
	textarea:focus {
	/*border: 1px solid #aaa;*/
	border: 1px solid #fca265;
	/*color: #444;*/
 		/*color: #fc7010;*/
	/*-moz-box-shadow: 0 0 3px rgba(0,0,0,.2);
	-webkit-box-shadow: 0 0 3px rgba(0,0,0,.2);
	box-shadow: 0 0 3px rgba(0,0,0,.2);*/
	-moz-box-shadow: 0 0 3px rgba(252,112,16,0.2);
	-webkit-box-shadow: 0 0 3px rgba(252,112,16,0.2);
	box-shadow: 0 0 3px rgba(252,112,16,0.2);
}

td {
	font-size: 14px !important;
	line-height: 1.48em;
}


input[name="t"], input[name="u"], textarea[name="x"] {
	width: 510px;
}
textarea[name="text"] {
	width: 550px;
}
.comment font[color="#aeaeae"] {color: #AEAEAE;}
.comment font[color="#bebebe"] {color: #BEBEBE;}
.comment font[color="#cecece"] {color: #CECECE;}
.comment font[color="#dedede"] {color: #DEDEDE;}
.comment font[color="#eeeeee"] {color: #EEEEEE;}
.comment font[color="#eee"] {color: #EEEEEE;}


.votearrow{display:none;}

/*input[type="submit"] {
	background: transparent;
	border: 2px solid #fc7010;
	padding: 2px 12px;
	
	color: #555;
	display: inline-block;
	font-size: 14px;
	font-weight: bold;
	text-decoration: none;
	text-shadow: 0 1px rgba(255, 255, 255, .75);
	cursor: pointer;
	margin-bottom: 20px;
	line-height: 21px;
	font-family: "HelveticaNeue", "Helvetica Neue", Helvetica, Arial, sans-serif !important;
	
	-webkit-border-radius: 150px;
	border-radius: 150px;
	text-transform: capitalize;
	text-shadow: none;

	transition: all .3s linear;
	-o-transition: all .3s linear;
	-moz-transition: all .3s linear;
	-webkit-transition: all .3s linear;
}

input[type="submit"]:hover {
	color: white;
	background: #fc7010;
	text-shadow: none;

}
input[type="submit"]:active{
	margin-top: 4px;
}*/
/*body  { font-family:Verdana; font-size:10pt; color:#828282; }
td    { font-family:Verdana; font-size:10pt; color:#828282; }

.admin td   { font-family:Verdana; font-size:8.5pt; color:#000000; }
.subtext td { font-family:Verdana; font-size:  7pt; color:#828282; }

input    { font-family:Courier; font-size:10pt; color:#000000; }
input[type=\"submit\"] { font-family:Verdana; }
textarea { font-family:Courier; font-size:10pt; color:#000000; }

a:link    { color:#000000; text-decoration:none; }
a:visited { color:#828282; text-decoration:none; }

.default { font-family:Verdana; font-size: 10pt; color:#828282; }
.admin   { font-family:Verdana; font-size:8.5pt; color:#000000; }
.title   { font-family:Verdana; font-size: 10pt; color:#828282; }
.adtitle { font-family:Verdana; font-size:  9pt; color:#828282; }
.subtext { font-family:Verdana; font-size:  7pt; color:#828282; }
.yclinks { font-family:Verdana; font-size:  8pt; color:#828282; }
.pagetop { font-family:Verdana; font-size: 10pt; color:#222222; }
.comhead { font-family:Verdana; font-size:  8pt; color:#828282; }
.comment { font-family:Verdana; font-size:  9pt; }
.dead    { font-family:Verdana; font-size:  9pt; color:#dddddd; }

.comment a:link, .comment a:visited { text-decoration:underline;}
.dead a:link, .dead a:visited { color:#dddddd; }
.pagetop a:visited { color:#000000;}
.topsel a:link, .topsel a:visited { color:#ffffff; }

.subtext a:link, .subtext a:visited { color:#828282; }
.subtext a:hover { text-decoration:underline; }

.comhead a:link, .subtext a:visited { color:#828282; }
.comhead a:hover { text-decoration:underline; }

.default p { margin-top: 8px; margin-bottom: 0px; }

.pagebreak {page-break-before:always}

pre { overflow: auto; padding: 2px; max-width:600px; }
pre:hover {overflow:auto}*/

All credit goes to @druwynings. To add this user script, ensure TamperMonkey is installed, and then click the Raw button for file HelvetiNews.user.js (direct link). TamperMonkey should be able to redirect you to the UserScript installation page.