.cell { 
   display: inline-block;
   margin-left: 0px;
   margin-right: 0px;
   margin-top: 0px;
   margin-bottom: 0px;
   border: 2px solid black;
   text-align: left;
   padding: 3px;
   width: 100%;
}

#table_header { 
   background-color: #99ff99; 
   text-align : center;
   padding: 5px;
}

div span:hover { background-color: #99ff99}

div span { display: block; 
           padding-top: 5px;
		   padding-bottom: 5px;}
           
.tan { background-color: #ffffcc; }

.table_row {
   margin-left:auto; 
	margin-right:auto; 
	margin-top: 0px; 
	margin-bottom: 0px;  
}

.table_row:after {
  content: "";
  clear: both;
  display: table;
}

@media only screen and (min-width: 600px) {
   .content_row_tall { min-height: 275px; }
   .content_cell_tall { min-height: 255Px; }
   
   .content_row_med_tall { min-height: 240px; }
   .content_cell_med_tall { min-height: 220Px; }
   
   .content_row_med { min-height: 210px; }
   .content_cell_med { min-height: 190Px; }
   
   .content_row_med_short { min-height: 180px; }
   .content_cell_med_short { min-height: 160Px; }
   
   .content_row_short { min-height: 150px; }
   .content_cell_short { min-height: 120Px; }
   
   .content_row_very_short { min-height: 120px; }
   .content_cell_very_short { min-height: 100Px; }
}