* {margin:0; padding:0;}
body { overflow:hidden; margin:0; padding:0;}

a{
  text-decoration:none; 
}
 
#mainbox { margin: 0 0 0 5em; height:100%; overflow:auto; padding:0; border-left:1px solid ;;;;;}

#leftbox { position:absolute; left:0; top:0; width:5em; height:100%; margin:0; padding:0; text-align: center ;}
 
 
leftnavi {margin:50px 0 0 4em; width:12em; font-size:1em;}
#mainin { width:80%; margin:0 0 0 2em; padding:1em 0 30px 0;}
 
h1 {margin:0;padding:0 0 1em 0;}
h2 {border-bottom:1px solid #fc3; margin:3em 0 1em 0;}
 
.main_text {margin:10px 0; border:0px dotted #999;}


table {
	border : 1px solid #888 ;
	background-color : gray ;
	text-align : center ;
	margin-left: auto ;
    margin-right: auto ;
	}

td {
	border: 1px solid #ab8 ;
	background-color : #ffc ;
	padding : 0.1em ;
	width: 5%;
	
	vertical-align: top;
	}
 
.genteihatubai {
    color: red ;
    }
 
.enki {
    color: red ;
    } 
    


td.bunko { background-color: #E6E6E6; }
td.biniman { background-color: #CEECF5; }
td.seijin { background-color: #F6CEF5; }
td.kanketsu { background-color: #D0E2BF; }  

<!-- td class="biniman" -->