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;
}