maybe this helps:
/* =Menu
-------------------------------------------------------------- */
.main-navigation {
margin-bottom: -20px;
padding-left: 20px;
text-align: right;
vertical-align: bottom;
}
.main-navigation ul {
list-style: none;
margin: 0;
padding-left: 0;
}
.main-navigation li {
position: relative;
display: inline-block;
padding: 0 15px 3em 15px;
}
.main-navigation li:first-child {
padding-left: 0;
}
.main-navigation li:last-child {
padding-right: 0;
}
.main-navigation a {
color: inherit;
display: block;
text-align: left;
text-decoration: none;
white-space: nowrap;
}
.main-navigation ul ul {
position: absolute;
top: 100%;
left: 50%;
width: 180px;
background: #f2f2f2;
border-top: 3px solid #3b3b3b;
-moz-box-shadow: 0 2px 2px rgba(0,0,0,0.25);
-webkit-box-shadow: 0 2px 2px rgba(0,0,0,0.25);
box-shadow: 0 2px 2px rgba(0,0,0,0.25);
-moz-box-sizing: border-box;
-webkit-box-sizing: border-box;
box-sizing: border-box;
display: none;
float: none;
font-size: 97.5%;
margin-left: -90px;
padding: 15px;
z-index: 99999;
}
.main-navigation ul ul:before {
position: absolute;
top: -15px;
left: 50%;
content: url(images/sprites/menu-pointer.png);
display: block;
margin-left: -9px;
}
.main-navigation ul ul ul {
top: 0;
left: 100%;
width: auto;
margin-left: 0;
}
.main-navigation ul ul ul:before {
content: '';
}
.main-navigation ul ul a {
}
.main-navigation ul ul li {
display: block;
float: none;
margin-bottom: 4px;
margin-left: 0;
padding: 0;
}
.main-navigation ul ul li:last-child {
margin-bottom: 0;
}
.main-navigation li:hover > a {
}
.main-navigation ul ul :hover > a {
}
.main-navigation ul ul a:hover {
}
.main-navigation ul li:hover > ul {
display: block;
}
.main-navigation li.current_page_item a,
.main-navigation li.current-menu-item a {
}
/* =Menu : Mobile Navigation Button
-------------------------------------------------------------- */
a.mobilenav {
height: 1em;
color: #474747;
display: none;
font-size: 125%;
font-weight: bold;
margin-top: 25px;
text-align: center;
text-decoration: none;
}
a.mobilenav:before {
content: '+ ';
}