make submit button consistent with other submit button styles

css/tad-civicrm.css

@@ -173,6 +173,16 @@ div#crm-container.crm-container {
 
 .cividiscount #_qf_Main_reload {
     float: none;
+    padding: 15px;
+    margin: 0px;
+    border: none;
+    background-color: #222;
+    box-sizing: content-box;
+    display: inline-block;
+    width: auto;
+    font-size: 0.875rem;
+    font-weight: 800;
+    line-height: 1;
 }
 
 /* add padding to radio/checkbox label */