body
{
background:#9999CC;
 font-family:verdana;
 font-size:18px;
}

#principale
{
background:#CCFFCC;
 width: 800px;
 padding:30px;
 border:3px #000 solid;
}
 .destra{float:right;}
 .sinistra{float:left;}

 #menù
{
background:#FFFFCC;border:10px #000 solid;padding:10px;
width:300px;
}