div.contenente {
  background-color: #400000;
  width: 670px; 
}
div.content * { margin-top: 0.5em; margin-bottom: 0.5em; }
div.content h2 { border-bottom: 1px #444 solid; }
div.content h3 { text-decoration: underline; font-size: 100%; margin: 1em 0 1em 0; }
div.content code { border: 1px #444 dotted; }
div.content pre { padding: 1em;  border: 1px #444 dotted; }
div.content ul { margin-left: 3em; }
div.content ol { margin-left: 3em; }
div.content dd { margin-left: 3em; }
div.content dt { font-weight: bold; margin: 2em 0 2em 0; }
div.content .abstract { border: 1px #b3080b solid;  padding: 1em; color: #000; text-align: justify; }