Merge pull request #26 from Aloysb/source

Fix mobile navbar depths (z-indexes)

Author: xavierfoucrier

docs/.vuepress/styles/index.styl

@@ -28,15 +28,20 @@ html, body {
     border: none;
     position: sticky;
     top: 0;
-    z-index: 2;
+    z-index: 200;
     .links {
       background-color: transparent;
     }
   }
 
   .sidebar {
     background-color: $sidebarBg;
-    z-index: 1;
+    z-index: 100;
+
+    &-mask {
+      background-color: $sidebarBg;
+      opacity: 0.85;
+    }
   }
 
   .content__default {
@@ -217,6 +222,7 @@ blockquote {
   bottom: 0;
   left: 0;
   right: 0;
+  z-index: 0;
 }
 .mojs-interactive__controller .controller {
   position: absolute