site/source/stylesheets/demos/primes.css
@import url(http://fonts.googleapis.com/css?family=Source+Code+Pro:400,700);

div {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  overflow: auto;
}

span {
  margin: 0;
  font-family: "Source Code Pro", monospace;
  font-size: 24pt;
  font-weight: bold;
  letter-spacing: -1px;
  word-break: break-all;;
}

span:nth-child(odd) {
  color: #bbb;
}

span:nth-child(even) {
  color: #888;
}

p {
  position: fixed;
  top: 30%;
  left: 0;
  right: 0;
  min-height: 100px;
  margin: 0;
  padding: 2ex 2em;
  font-family: Helvetica, Arial, sans-serif;
  font-size: 24pt;
  color: #fff;
  /*text-align: center;*/
  z-index: 1;
}

p:before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: #000;
  opacity: 0.75;
  filter: alpha(opacity=75);
  z-index: -1;
}

p code {
  font-family: "Source Code Pro", monospace;
  color: #def;
}

p strong {
  color: #efd;
}

@media all and (max-height: 600px) {
  p {
    top: auto;
    bottom: 0;
  }
}

@media all and (max-width: 600px) {
  p {
    font-size: 12pt;
  }
}
