added split card warning

src/css/app.css

@@ -31,6 +31,10 @@ body {
 .phrase {
     word-break: keep-all;
 }
+.phraseSplitWarn {
+	text-align: right;
+	color: red;
+}
 .generate-container .strength {
     /* override mobile width from bootstrap */
     width: auto!important;