diff --git a/get_online_session_communities.php b/get_online_session_communities.php
index 7cadae82..2e476062 100644
--- a/get_online_session_communities.php
+++ b/get_online_session_communities.php
@@ -570,20 +570,27 @@
 				}
 			}
 
+			// test if active_users is valid
+			$active_users = $content["active_users"];
+			if($active_users == -1) {
+				$active_users = "N/A";
+			}
+
 			$line =
 				"	<tr>" . PHP_EOL .
-				"		<td>" . $id . "</td>" . PHP_EOL .
+				"		<td class=\"td_identifier\">" . $id . "</td>" . PHP_EOL .
 				"		<td>" . $content["name"] . "</td>" . PHP_EOL .
 				"		<td>" . $content["description"] . "</td>" . PHP_EOL .
-				"		<td class=\"td_users\">" . $content["active_users"] . "</td>" . PHP_EOL .
+				"		<td class=\"td_users\">" . $active_users . "</td>" . PHP_EOL .
 				"		<td><a href=\"" . $preview_link . "\">" . $preview_link . "</a></td>" . PHP_EOL .
-				"		<td>" . substr($join_link, 0, 32) . "...<button>Copy</button></td>" . PHP_EOL .
+				"		<td class=\"td_join_url\">" . substr($join_link, 0, 32) . "...<button>Copy</button></td>" . PHP_EOL .
 				"	</tr>" . PHP_EOL;
 			$table_lines[] = $line;
 		}
 
 		// prefix
 		$prefix =
+			"<h1 id=\"headline\">Session Communities</h1>" . PHP_EOL .
 			"<table id=\"tbl_communities\">" . PHP_EOL .
 			"	<tr>" . PHP_EOL .
 			"		<th id=\"th_identifier\">Identifier</th>" . PHP_EOL .
@@ -595,10 +602,14 @@
 			"	</tr>" . PHP_EOL;
 
 		// suffix
-		// span over 5 columns (id, name, description, users, preview, join link)
+		// span over 6 columns (id, name, description, users, preview, join link)
+		$span_count = 6;
 		$suffix =
 			"	<tr>" . PHP_EOL .
-			"		<td colspan=\"6\">" . count($table_lines) . " unique Session Communities have been found.</td>" . PHP_EOL .
+			"		<td id=\"td_summary\" colspan=\"" . $span_count . "\">" . count($table_lines) . " unique Session Communities have been found.</td>" . PHP_EOL .
+			"	</tr>" . PHP_EOL .
+			"	<tr>" . PHP_EOL .
+			"		<td id=\"td_last_checked\" colspan=\"" . $span_count . "\">Last checked X minutes ago.</td>" . PHP_EOL .
 			"	</tr>" . PHP_EOL .
 			"</table>" . PHP_EOL;
 
diff --git a/output/styles.css b/output/styles.css
index 2c6c99d2..4d71dafe 100644
--- a/output/styles.css
+++ b/output/styles.css
@@ -1,9 +1,16 @@
+#headline        { text-align: center; }
+
 #tbl_communities { width:100%; }
 
-#th_identifier   { width:11%; }
-#th_name         { width:11%; }
+#th_identifier   { width:8%; }
+.td_identifier   { font-family: monospace; }
+#th_name         { width:14%; }
 #th_description  {  }
 #th_users        {  }
 .td_users        { text-align: right; }
 #th_preview      { width:20%; }
-#th_join_url     { width:19%; }
+#th_join_url     { width:18%; }
+.td_join_url     { font-family: monospace; }
+
+#td_summary      { text-align: center; }
+#td_last_checked { text-align: center; }