Jonathan commented on OPEN BETA Shopify RMA 2.0 - Integrated RMA & Exchange System (Updated 11-22-13)

Here some simple css for taking advantage of the new element classes and id's

/**
 *RMA
**/
#rma-container{
 width: 800px;
 height: 100%;
}

.rma-billing-address{
 float: left;
 width: 300px;
 padding-left: 100px;
}

.rma-shipping-address{
 float: left;
 width: 300px;
 padding-left: 100px;
}

.rma-reason{
  clear: both;
  padding-top: 10px;
  width: 400px;
}

.rma-items{
  width: 800px;
}

.rma-items td{
  text-align: left;  
}

Just a quick bit of css I was using in my dummy store to adjust the layout and make it blend better. With the above example you can see how easy it is to adjust your look and feel in your own theme.