body { 
  font: 62.5% Arial, Verdana, sans-serif; 
} 

div {
  margin: 0.5em;
  padding: 0.5em;
  border: 1px solid #888;
  font-style: normal;
  font-weight: normal;
  background-color: #eee;
  float: left;
  clear: left;
}

.highlight {
  background-color: #000;
  color: #fff;
}