diff --git a/css/style.css b/css/style.css
index eca406f..3f8f19f 100644
--- a/css/style.css
+++ b/css/style.css
@@ -1,3 +1,15 @@
-#hello {
-	color: red;
-}
\ No newline at end of file
+/* Navigation: folder like structure */
+#app-mailbox-content {
+	width: 250px;
+	height: 100%;
+	float: left;
+	-moz-box-sizing: border-box; box-sizing: border-box;
+	background-color: #f5f5f5;
+	padding-bottom: 44px;
+	border-left: 1px solid #ddd;
+	border-right: 1px solid #ddd;
+	-webkit-user-select: none;
+	-moz-user-select: none;
+	-ms-user-select: none;
+	user-select: none;
+}
diff --git a/templates/part.navigation.php b/templates/part.navigation.php
index 4992ab2..a1b62d9 100644
--- a/templates/part.navigation.php
+++ b/templates/part.navigation.php
@@ -1,12 +1,7 @@
 <ul>
 	<?php foreach ($_['mailboxes'] as $mboxName => $mailbox) { ?>
 		<?php if (count($mailbox['phoneNumbers']) > 0) { ?>
-		<li><a href="<?php p($mailbox['url']); ?>"><?php p($mailbox['label']); ?></a>
-		<ul>
-		<?php foreach ($mailbox['phoneNumbers'] as $number) { ?>
-			<li><?php p($number); ?></li>
-		<?php } ?>
-		</ul></li>
-		<?php }
+		<li><a href="<?php p($mailbox['url']); ?>"><?php p($mailbox['label']); ?></a></li>
+	<?php }
 	} ?>
 </ul>