ok i think i have found it. just want to make sure i change the correct field though.
#popupShippingEstimator {background:#FFFFFF; padding:0;}
#popupShippingEstimator div {padding:15px;}
#popupShippingEstimator #state{ margin-left:128px;}
#shippingEstimatorContent h2 {text-transform:uppercase;
font-weight:bold;
color:#fff;
font-family: 'Open Sans', sans-serif;
font-size:16px;
line-height:18px;
padding:9px 0 0 0;
margin:0 0 27px -1px;}
select#country, select#stateZone {width:160px; margin:0 0 3px;}
input#state {width:156px; margin:0 0 3px 0px;}
#popupShippingEstimator label#stateLabel {display:none;}
#shippingEstimatorContent td.cartTotalDisplay {font-family: 'Open Sans', sans-serif;
color:#fff;
font-size:20px;
line-height:22px;
font-weight:normal;}
#shippingEstimatorContent table {margin:0px 0px 5px 0px; border-left:1px solid #E1E1E1; border-bottom:1px solid #E1E1E1; border-collapse:collapse;}
#shippingEstimatorContent th {padding:5px 10px; border-top:1px solid #E1E1E1; border-right:1px solid #E1E1E1; text-align:center;}
#shippingEstimatorContent th {font-size:12px; font-weight:normal; background:#fafafa; color:#000;}
#shippingEstimatorContent th a {color:#000;}
#shippingEstimatorContent td {border-right:1px solid #E1E1E1; border-top:1px solid #E1E1E1; padding:5px;}
#shippingEstimatorContent td {font-family:Arial, Helvetica, sans-serif; font-size:12px; line-height:17px;}