A userstyle to Hacker News (http://news.ycombinator.com) which tries to keep the feel of the original but with better readability. Specifically, it sets a max-width and better font sizes.

HackerNews-Restyle.css

html {
  -webkit-box-sizing: border-box;
          box-sizing: border-box;
  font-family: Verdana, sans-serif;
  font-size: 16px;
  line-height: 1.5;
}

*,
*:before,
*:after {
  -webkit-box-sizing: inherit;
          box-sizing: inherit;
}

body {
  margin: 0 auto;
  max-width: 50em;
}
 
body,
td,
input,
textarea,
.default,
.title,
.pagetop {
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
}

textarea {
  width: 100%;
  resize: vertical;
}

pre {
  max-width: 37.5em;
  overflow: auto;
  padding: .13em;
}

table {
  width: 100%;
  border-collapse: collapse;  
}

tr[style~='height:10px'] {
  height: 1em;
}
 
tr[style~='height:5px'] {
  height: 1.5em;
}
 
td {
  padding: .125em .25em;
}
 
.admin td {
  font-size: .75em;
}
 
.adtitle,
.dead,
.comment {
  font-size: .9em;
}
 
.default p {
  margin-top: 0;
  margin-bottom: .7em;
}
 
.subtext td,
.yclinks,
.comhead {
  font-size: .6em;
}

Moving away from pixels and declaring defaults on HTML and extending them to other elements via inherit. It makes it easy to override if need be.