Merge pull request sveltejs#2311 from sveltejs/sveltejsgh-2306

Fix zen mode REPL nav CSS

Author: Rich-Harris

site/src/routes/repl/index.svelte

@@ -125,7 +125,7 @@
 		width: 100%;
 		height: 100%;
 		top: 0;
-		z-index: 11;
+		z-index: 111;
 	}
 
 	.pane { width: 100%; height: 100% }