.rsgst-wrap{max-width:420px;border:1px solid #e3e3e3;padding:16px;border-radius:8px;font-family:Arial,Helvetica,sans-serif;background:#fff;}
.rsgst-title{margin:0 0 8px 0;}
.rsgst-wrap label{display:block;margin-bottom:8px;}
.rsgst-wrap input[type='number'], .rsgst-wrap select{width:100%;padding:8px;margin-top:4px;border:1px solid #ddd;border-radius:4px;box-sizing:border-box;}
.rsgst-mode label{display:inline-block;margin-right:12px;}
#rsgst-calc{width:100%;padding:10px;border:none;background:#2b8aef;color:#fff;border-radius:6px;cursor:pointer;margin-top:8px;}
.rsgst-result{margin-top:12px;padding:10px;background:#fafafa;border-radius:6px;border:1px solid #eee;}