:link  { color: rgb(0, 145, 0) }
   :visited { color: rgb(250, 0, 0) }
   :active { color: rgb(0, 0, 255) }
   :hover { color: rgb(0, 0, 180) }

   body { 
    background: #FFFFFF;
    color: black;
    margin-left: 9%; 
    margin-right: 1%; 
        }
   h1 { margin-left: -6% }
   h2 { margin-left: -5% }
   h3 { margin-left: -4% }
   h4 { margin-left: -3% }
   h5 { margin-left: -2% }
   h6 { margin-left: -1% }
   pre {
     font-weight: bold;
     white-space: pre; font-family: monospace;
     margin-left: 05%; 
       }
   em { font-style: italic; font-weight: bold }
   strong { font-weight: bold }
   .navbar {text-align: center }