custom.css

body {
   font-family: sans-serif;
   background-color: white;
   font-size: 12px;
   width: 800px;
   margin: 8px auto;

}

tt, code, pre {
   font-family: 'DejaVu Sans Mono', 'Droid Sans Mono', 'Lucida Console', Consolas, Monaco, monospace;
   background-color: #EEE;
   border: 1px solid #CCC;
}

h1 { 
   font-size:2.2em; 
   color: rgb(21,106,155);
}

h2 { 
   font-size:1.8em; 
   border-bottom: 2px solid rgb(139,174,204);
}

h3 { 
   font-size:1.4em; 
   font-weight: normal;
}

h4 { 
   font-size:1.0em; 
}

h5 { 
   font-size:0.9em; 
}

h6 { 
   font-size:0.8em; 
}

a:visited {
   color: rgb(50%, 0%, 50%);
}

pre {	
   margin-top: 0;
   max-width: 95%;
   border: 1px solid #ccc;
   white-space: pre-wrap;
}

pre code {
   display: block; padding: 0.5em;
}

code.r, code.cpp {
   background-color: #F8F8F8;
}

table {
    border-collapse: collapse;
    border-bottom: 2px solid black;
    margin-bottom: 2em;
}

th {
    border-top:2px solid black;
    border-bottom: 1px solid black;
    background-color: #EEE;
}

td {
    border: 0px;
}

caption {
    padding-top: 0.5em;
    text-align: left;
}

blockquote {
   color:#666666;
   margin:0;
   padding-left: 1em;
   border-left: 0.5em #EEE solid;
}

hr {
   height: 0px;
   border-bottom: none;
   border-top-width: thin;
   border-top-style: dotted;
   border-top-color: #999999;
}

@media print {
   * { 
      background: transparent !important; 
      color: black !important; 
      filter:none !important; 
      -ms-filter: none !important; 
   }

   body { 
      font-size:12pt; 
      max-width:100%; 
   }
       
   a, a:visited { 
      text-decoration: underline; 
   }

   hr { 
      visibility: hidden;
      page-break-before: always;
   }

   pre, blockquote { 
      padding-right: 1em; 
      page-break-inside: avoid; 
   }

   tr, img { 
      page-break-inside: avoid; 
   }

   img { 
      max-width: 100% !important; 
   }

   @page :left { 
      margin: 15mm 20mm 15mm 10mm; 
   }
     
   @page :right { 
      margin: 15mm 10mm 15mm 20mm; 
   }

   p, h2, h3 { 
      orphans: 3; widows: 3; 
   }

   h2, h3 { 
      page-break-after: avoid; 
   }
}