html {
   scrollbar-3dlight-color: black;
   scrollbar-darkshadow-color: black;
   scrollbar-highlight-color: white;
   scrollbar-shadow-color: white;
   scrollbar-arrow-color: black;
   scrollbar-face-color: white;
   scrollbar-track-color: white;
   cursor: auto;
}

#contents {
   width: 800px;
   height: 700px;
   padding: 10px;
   margin-left: auto;
   margin-right: auto;
   margin-top: 30px;
   margin-bottom: 30px; 
   border-style: solid;
   border-color: black;
   border-width: 1px;
}