body { font-family : Helvetica, Arial, Courier;  
       background: #333; color: #fff; 
       width : 90%;
       margin: 0 auto;
      }     
sidebar { position:absolute; left:520px; top:20px; padding : 10px;}
#links { margin-top : 15px;}
h1 { margin-top: 20px; }
pre { color: #0f0; background: #000; text-align: left; padding: 10px; }
#content { float : left; width: 60%; margin-bottom: 10px;}
#src { clear : both; }
#demo { float : left; width : 200px; height: 200px; margin: 10px; 
        background: #222; padding: 10px;}
::selection {
        background: #550000; /* Safari */
        }
::-moz-selection {
        background: #550000; /* Firefox */
}
a { color: #fff}
.hilite { color : #ffff00 ; display : block; }