diff --git a/css/mo.css b/css/mo.css
index e321381..5d22be3 100644
--- a/css/mo.css
+++ b/css/mo.css
@@ -207,6 +207,38 @@ by Jonathan Snook at http://smacss.com
   text-align: left;
   background-color: #cccccc;
 }
+.is-mobile-menu .toggle-submenu {
+  width: 44px;
+  height: 44px;
+  display: inline-block;
+  position: absolute;
+  top: 0;
+  bottom: 0;
+  right: 0;
+}
+.is-mobile-menu .toggle-submenu:after {
+  content: '';
+  position: absolute;
+  top: 50%;
+  right: 40%;
+  margin-top: -3px;
+  height: 0;
+  width: 0;
+}
+.is-mobile-menu li.has-submenu > a {
+  padding-right: 44px;
+}
+.is-mobile-menu .toggle-submenu:after {
+  border: 5px solid transparent;
+  margin-top: -3px;
+  border-color: transparent;
+  border-top-color: #000000;
+}
+.is-mobile-menu ul .toggle-submenu:after {
+  margin-top: -5px;
+  border-color: transparent;
+  border-left-color: #000000;
+}
 .is-mobile-menu li > ul.sub-menu,
 .is-mobile-menu li:hover > ul.sub-menu {
   display: none;
diff --git a/css/mo.css.map b/css/mo.css.map
index 958b6fd..015d79e 100644
--- a/css/mo.css.map
+++ b/css/mo.css.map
@@ -1,6 +1,6 @@
 {
 "version": 3,
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+"mappings": ";;;;;;;AAcA,eAAgB;EACf,OAAO,EAAE,IAAI;;;AAId,mBAAoB;EACnB,WAAW,EAAE,OAAO;EACpB,MAAM,EAAE,OAAO;EACf,UAAU,EAAE,IAAI;EAChB,cAAc,EAAE,SAAS;EACzB,gBAAgB,EAAE,IAAI;EACtB,KAAK,EAAE,OAAO;EACd,OAAO,EAAE,MAAM;EACf,OAAO,EAAE,YAAY;;;ACsErB,4BAAe;EACd,KAAK,EDlE6B,OAAO;ECmEzC,MAAM,EDnEqC,OAAO;ECoElD,OAAO,EAAE,YAAY;EACrB,QAAQ,EAAE,QAAQ;EAClB,GAAG,EAAE,CAAC;EACN,MAAM,EAAE,CAAC;EACT,KAAK,EAAE,CAAC;;AAGT,kCAAsB;EACrB,OAAO,EAAE,EAAE;EACX,QAAQ,EAAE,QAAQ;EAClB,GAAG,EAAE,GAAG;EACR,KAAK,EAAE,GAAG;EACV,UAAU,EAAE,IAAI;EAChB,MAAM,EAAE,CAAC;EACT,KAAK,EAAE,CAAC;;AAGT,+BAAmB;EAClB,aAAa,EDtFqB,OAAO;;ACyC1C,kCAAsB;EACrB,MAAM,EAAE,qBAAqB;EAyI9B,UAAU,EAAE,IAAI;EAChB,YAAY,EAAE,WAAW;EACzB,gBAAgB,EDrLqC,OAAO;;ACgD5D,qCAAyB;EA0IzB,UAAU,EAAE,IAAI;EAChB,YAAY,EAAE,WAAW;EACzB,iBAAiB,ED5LoC,OAAO;;;AAI7D,kBAAmB;EClClB,MAAM,EAAE,CAAC;EACT,OAAO,EAAE,CAAC;EACV,UAAU,EAAE,IAAI;EAChB,kBAAkB,EAAE,UAAU;EAC9B,eAAe,EAAE,UAAU;EAC3B,UAAU,EAAE,UAAU;;AAEtB,oBAAE;EACD,MAAM,EAAE,CAAC;EACT,OAAO,EAAE,CAAC;EACV,UAAU,EAAE,IAAI;EAChB,kBAAkB,EAAE,UAAU;EAC9B,eAAe,EAAE,UAAU;EAC3B,UAAU,EAAE,UAAU;;AAGvB;yDACuC;EACtC,OAAO,EAAE,KAAK;;ADkBf,yBAAyB;ECXzB,uBAAK;IACJ,OAAO,EAAE,YAAY;;EAErB,2BAAI;IACH,OAAO,EAAE,YAAY;;EAIvB,qBAAG;IACF,QAAQ,EAAE,QAAQ;IAClB,WAAW,EAAE,MAAM;;EAMpB,gCAAc;IACb,OAAO,EAAE,KAAK;;EAIf,qBAAG;IACF,QAAQ,EAAE,QAAQ;IAClB,OAAO,EAAE,IAAI;IAEb,IAAI,EAAE,CAAC;IACP,OAAO,EAAE,IAAI;IACb,UAAU,EAAE,IAAI;;EAEhB,uBAAE;IACD,OAAO,EAAE,KAAK;;EAIf,wBAAG;IACF,GAAG,EAAE,CAAC;IACN,IAAI,EAAE,IAAI;;;ADpBZ,oBAAE;EACD,OAAO,EAAE,MAAM;EACf,WAAW,EAAE,OAAO;EACpB,KAAK,EAAE,IAAI;;AAGZ;0BACQ;EACP,UAAU,EAAE,IAAI;EAChB,OAAO,EAAE,IAAI;;AAGd,uBAAK;EACJ,UAAU,EAAE,IAAI;;AAEhB,4DACQ;EACP,UAAU,EAAE,IAAI;;;AAOnB,WAAY;ECjEX,MAAM,EAAE,CAAC;EACT,OAAO,EAAE,CAAC;EACV,UAAU,EAAE,IAAI;EAChB,kBAAkB,EAAE,UAAU;EAC9B,eAAe,EAAE,UAAU;EAC3B,UAAU,EAAE,UAAU;;AAEtB,aAAE;EACD,MAAM,EAAE,CAAC;EACT,OAAO,EAAE,CAAC;EACV,UAAU,EAAE,IAAI;EAChB,kBAAkB,EAAE,UAAU;EAC9B,eAAe,EAAE,UAAU;EAC3B,UAAU,EAAE,UAAU;;AAGvB;kDACuC;EACtC,OAAO,EAAE,KAAK;;AAOf,gBAAK;EACJ,OAAO,EAAE,YAAY;;AAErB,oBAAI;EACH,OAAO,EAAE,YAAY;;AAIvB,cAAG;EACF,QAAQ,EAAE,QAAQ;EAClB,WAAW,EAAE,MAAM;;ADiCpB,yBAAyB;EC3BzB,yBAAc;IACb,OAAO,EAAE,KAAK;;EAIf,cAAG;IACF,QAAQ,EAAE,QAAQ;IAClB,OAAO,EAAE,IAAI;IAEb,IAAI,EAAE,CAAC;IACP,OAAO,EAAE,IAAI;IACb,UAAU,EAAE,IAAI;;EAEhB,gBAAE;IACD,OAAO,EAAE,KAAK;;EAIf,iBAAG;IACF,GAAG,EAAE,CAAC;IACN,IAAI,EAAE,IAAI;;EAiLZ,cAAG;IACF,UAAU,EAAE,IAAI;;EAEhB,gBAAE;IACD,MAAM,EAAE,cAAgB;IACxB,aAAa,EAAE,OAAO;IACtB,OAAO,EAAE,IAAI;;EAGd,4BAAc;IACb,aAAa,EAAE,cAAgB;IAC/B,MAAM,EAAE,IAAI;;EAGb,iBAAG;IACF,UAAU,EAAE,GAAG;IACf,WAAW,EAAE,IAAI;;;ADrLnB,aAAE;EACD,OAAO,EAAE,MAAM;EACf,WAAW,EAAE,OAAO;EACpB,KAAK,EAAE,IAAI;;AAGZ;mBACQ;EACP,UAAU,EAAE,IAAI;EAChB,KAAK,EAAE,IAAI;EACX,OAAO,EAAE,IAAI;;AAGd,gBAAK;EACJ,UAAU,EAAE,IAAI;EAChB,KAAK,EAAE,IAAI;;AAEX,8CACQ;EACP,gBAAgB,EAAE,IAAI;;;AAOzB,eAAgB;EAGf,UAAU,EAAE,IAAI;EAChB,gBAAgB,EAAE,OAAO;;ACRzB,+BAAe;EACd,KAAK,EAyB0B,IAAI;EAxBnC,MAAM,EAwB+C,IAAI;EAvBzD,OAAO,EAAE,YAAY;EACrB,QAAQ,EAAE,QAAQ;EAClB,GAAG,EAAE,CAAC;EACN,MAAM,EAAE,CAAC;EACT,KAAK,EAAE,CAAC;;AAGT,qCAAsB;EACrB,OAAO,EAAE,EAAE;EACX,QAAQ,EAAE,QAAQ;EAClB,GAAG,EAAE,GAAG;EACR,KAAK,EAAE,GAAG;EACV,UAAU,EAAE,IAAI;EAChB,MAAM,EAAE,CAAC;EACT,KAAK,EAAE,CAAC;;AAGT,kCAAmB;EAClB,aAAa,EAKkB,IAAI;;AAlDpC,qCAAsB;EACrB,MAAM,EAAE,qBAAqB;EAyI9B,UAAU,EAAE,IAAI;EAChB,YAAY,EAAE,WAAW;EACzB,gBAAgB,EA1F0D,OAAO;;AA3CjF,wCAAyB;EA0IzB,UAAU,EAAE,IAAI;EAChB,YAAY,EAAE,WAAW;EACzB,iBAAiB,EAjGyD,OAAO;;AAgFjF;sCACuB;EACtB,OAAO,EAAE,IAAI;;AAtBb,mDAAwB;EA4BzB,UAAU,EAAE,IAAI;EAChB,YAAY,EAAE,WAAW;EACzB,gBAAgB,EA1F0D,OAAO;;AAgEhF,sDAA2B;EAwB5B,UAAU,EAAE,IAAI;EAChB,YAAY,EAAE,WAAW;EACzB,gBAAgB,EA1F0D,OAAO;;AAoEhF,sEAA2C;EAkC5C,UAAU,EAAE,IAAI;EAChB,YAAY,EAAE,WAAW;EACzB,mBAAmB,EAxGuD,OAAO;;AAwEhF,yEAA8C;EA8B/C,UAAU,EAAE,IAAI;EAChB,YAAY,EAAE,WAAW;EACzB,mBAAmB,EAxGuD,OAAO;;AAIjF,kBAAG;EACF,OAAO,EAAE,gBAAgB;EACzB,QAAQ,EAAE,QAAQ;EAClB,WAAW,EAAE,MAAM;;AAEnB,oBAAE;EACD,OAAO,EAAE,gBAAgB;;AAI3B,kBAAG;EACF,QAAQ,EAAE,QAAQ;EAClB,GAAG,EAAE,IAAI;EACT,UAAU,EAAE,CAAC;;AAEb,qBAAG;EACF,QAAQ,EAAE,QAAQ;EAClB,IAAI,EAAE,CAAC;;ADrCT,iBAAE;EACD,gBAAgB,EAAE,OAAO;EACzB,KAAK,EAAE,IAAI;;AAEX,uBAAQ;EACP,gBAAgB,EAAE,OAAO;;;AC2F3B;kCACuB;EACtB,OAAO,EAAE,IAAI;;AAlDb,kEAA2C;EAsE5C,UAAU,EAAE,IAAI;EAChB,YAAY,EAAE,WAAW;EACzB,mBAAmB,ED5Ge,OAAO;;ACwCxC,qEAA8C;EAyE/C,UAAU,EAAE,IAAI;EAChB,YAAY,EAAE,WAAW;EACzB,kBAAkB,EDnHgB,OAAO;;;ACoFzC;sCACuB;EACtB,OAAO,EAAE,IAAI;;AAtBb,mDAAwB;EA4BzB,UAAU,EAAE,IAAI;EAChB,YAAY,EAAE,WAAW;EACzB,gBAAgB,ED1FW,IAAI;;ACgE9B,sDAA2B;EAwB5B,UAAU,EAAE,IAAI;EAChB,YAAY,EAAE,WAAW;EACzB,gBAAgB,ED1FW,IAAI;;ACoE9B,sEAA2C;EAkC5C,UAAU,EAAE,IAAI;EAChB,YAAY,EAAE,WAAW;EACzB,mBAAmB,EDxGQ,IAAI;;ACwE9B,yEAA8C;EA8B/C,UAAU,EAAE,IAAI;EAChB,YAAY,EAAE,WAAW;EACzB,mBAAmB,EDxGQ,IAAI",
 "sources": ["../sass/demo.scss","../sass/_mo.scss"],
 "names": [],
 "file": "mo.css"
diff --git a/sass/_mo.scss b/sass/_mo.scss
index 4b0ee95..e45f703 100644
--- a/sass/_mo.scss
+++ b/sass/_mo.scss
@@ -66,7 +66,6 @@
 	}
 }
 
-
 /// Submenu arrow styles for horizontal menus.
 @mixin mo-css-arrows-horizontal( $button-width: 44px, $button-height: 44px, $arrow-color: #000000 ) {
 	@include mo-arrows-base( $button-width, $button-height );
@@ -122,8 +121,9 @@
 }
 
 /// Mobile menu styles.
-@mixin mo-mobile {
-	@include mo-arrows-mobile;
+@mixin mo-mobile( $button-width: 44px, $button-height: 44px, $arrow-color: #000000 ) {
+	@include mo-css-arrows-horizontal( $button-width, $button-height, $arrow-color );
+	@include mo-arrows-mobile ( $arrow-color );
 
 	li {
 		display: block !important;
@@ -208,7 +208,7 @@
 }
 
 /// Created arrow pointing down.
-@mixin mo-arrow-down( $arrow-color: #000000 ) {
+@mixin mo-arrow-down( $arrow-color: '#000000' ) {
 	margin-top: -3px;
 	border-color: transparent;
 	border-top-color: $arrow-color;