diff --git a/web/gui/src/main/webapp/app/fw/mast/mast.css b/web/gui/src/main/webapp/app/fw/mast/mast.css
index 600c3f0..a8df379 100644
--- a/web/gui/src/main/webapp/app/fw/mast/mast.css
+++ b/web/gui/src/main/webapp/app/fw/mast/mast.css
@@ -77,26 +77,101 @@
 
 #mast-right {
     display: inline-block;
-    padding-top: 8px;
-    padding-right: 16px;
     float: right;
-    /*border: 1px solid red;*/
-}
-
-#mast-right a {
-    font-size: 12pt;
-    font-style: normal;
-    font-weight: bold;
-    text-decoration: none;
+    position: relative;
+    top: -4px;
+    padding-right: 15px;
+    line-height: 44px;
 }
 
 .light #mast-right a {
     color: #369;
 }
+
 .dark #mast-right a {
     color: #eee;
 }
 
-#mast-right a:hover {
-    color: #CE5650;
+.light #mast nav  {
+    color: #369;
 }
+
+.dark #mast nav  {
+    color: #eee;
+}
+
+/*
+    MAST HEAD DROPDOWN MENU
+*/
+
+#mast .dropdown-parent {
+    position: relative;
+}
+
+#mast .dropdown-parent i.dropdown-icon {
+    display: inline-block;
+    height: 7px;
+    width: 9px;
+    margin-left: 10px;
+    background: url('/onos/ui/data/img/dropdown-icon.png') no-repeat;
+}
+
+#mast .dropdown {
+    position: absolute;
+    top: 44px;
+    right: 0;
+    display: none;
+    min-width: 100px;
+    border-top: 1px solid #999;
+    line-height: 16px;
+    z-index: 1000;
+}
+
+#mast .dropdown a {
+    text-decoration: none;
+    font-size: 14px;
+    display: block;
+    padding: 8px 16px 6px 12px;
+}
+
+#mast .dropdown-parent:hover .dropdown {
+    display: block;
+}
+
+#mast .dropdown-parent:hover i.dropdown-icon {
+    background-position-x: -14px
+}
+
+html[data-platform='iPad'] #mast .dropdown {
+    top: 57px;
+}
+
+/* Theme styles for drop down menu */
+
+.light #mast .dropdown {
+    background-color: #bbb;
+    box-shadow: 0 2px 8px #777;
+}
+
+.dark #mast .dropdown {
+    background-color: #444;
+    box-shadow: 0 2px 8px #111;
+}
+
+.light #mast .dropdown a {
+    color: #369;
+    border-bottom: solid #ccc 1px;
+}
+
+.dark #mast .dropdown a {
+    color: #eee;
+    border-bottom: solid #333 1px;
+}
+
+.light #mast .dropdown a:hover {
+    background-color: #ddd;
+}
+
+.dark #mast .dropdown a:hover {
+    background-color: #777;
+}
\ No newline at end of file