body 
{
    font-family : Arial ;
    font-size:12px;
}

p { font-family: Verdana ;
    font-size: 12px;
    }

#content 
{
    padding:10px;
}

.calculator
{
   background-color:#CCFF99;
   font-size:12px;
   }
   
   
.calculator_header
{ background-color:#99CC99;
    font-size:18px;
    padding: 5px;}   
    
h2 { color: White;
    font-size:18px;
    text-align:center;
    padding:5px;}
   
   
.introduction
{ padding:10px;
    font-family:Arial;
    font-size:14px;
    }

.article
{
    padding:10px;
    margin-left:10px;
    font-style:italic;}
	
table
{ border-collapse:collapse;}