@import url(http://fonts.googleapis.com/css?family=Lora);

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font: 16px/1.3 'Lora', serif;
  background: #f1f1f1;
}

h1 {
  line-height: 1.5; 
}

h4 {
  font-size: 1em;
  margin-bottom: 1.25em;
}

hr {
  margin: 1em 0;
  background: #212121;
  border: none;
  width: 100%;
  height: 1px;
}

.wrap {
  width: 100%;
  max-width: 35em;
  margin: 0 auto;
  padding-top: 2em;
}

.original, .demo {
  background: #fff;
  padding: 1.75em;
  position: relative;
  
  &:before {
    background: #212121;
    color: #f1f1f1;
    position: absolute;
    top: 0;
    left: 0;
    padding: .25em;
  }
}

.original {
  &:before {
    content: 'original';
  }
}

.demo {
  &:before {
    content: 'demo';
  }
}