fix issue of ribbon style of demo

Author: dev-javascript

example/stories/styles.css

@@ -1,7 +1,17 @@
-pre > span.token.tag:nth-last-child(3),
-pre > span.token.punctuation:nth-last-child(2) {
+pre>span.token.tag:nth-last-child(3),
+pre>span.token.punctuation:nth-last-child(2) {
   display: none;
 }
-main > footer {
+
+main>footer {
   display: none !important;
 }
+
+footer {
+  z-index: 1 !important;
+}
+
+main {
+  position: relative !important;
+  z-index: 2 !important;
+}