docs(OfflineLocalView): fix css that was preventing event handling

Author: jourdain

Examples/Applications/OfflineLocalView/viewer.module.css

@@ -8,7 +8,7 @@
   background: black;
   margin: 0;
   padding: 0;
-  z-index: -1;
+  z-index: 0;
   display: flex;
   align-items: center;
   justify-content: center;
@@ -44,7 +44,7 @@
   font-size: 50px;
   color: black;
   z-index: 1;
-  background: rgba(128,128,128,.5);
+  background: rgba(128, 128, 128, 0.5);
   padding: 20px;
   border-radius: 10px;
   user-select: none;
@@ -54,6 +54,6 @@ body {
   margin: 0;
 }
 
-html { 
-  overflow: hidden; 
+html {
+  overflow: hidden;
 }