#mortgage-calculator {text-align:center;
                     width:230px;
                     height:230px; 
                     padding:5px;
                     margin-left: 350px;
                     margin-right: 350px;
                     text-decoration:none;
                     font:bold 14px Arial, Helvetica, sans-serif;}

#border { margin-left: auto;
          margin-right: auto;
          margin-top: 100px;
          margin-bottom: 100px;}