CSS: limit width of the comments in community tab

assets/css/default.css

@@ -321,6 +321,16 @@ p.channel-name { margin: 0; }
 p.video-data   { margin: 0; font-weight: bold; font-size: 80%; }
 
 
+/*
+ * Comments & community posts
+ */
+
+#comments {
+  max-width: 800px;
+  margin: auto;
+}
+
+
 /*
  * Footer
  */