/* http://www.menucool.com/vertical/vertical-menu */
ul#mega_menu, #mega_menu ul
{
    width: 100%; /* Main Menu width */
    list-style:none; margin:0; padding:0;
    z-index:100;
}     

#mega_menu li
{
	width: 100%;
	margin: 0;
	padding: 0px 0px 0px 10px;
	float: left;
	position: relative;
	background-color: #FFF;
	border-bottom: 1px solid #eee;
	border-left: 1px solid #eee;
	border-right: 1px solid #eee;
}
#mega_menu li:hover
{
    background-color:#eeeeee;
}
#mega_menu a:hover
{
   color:#F00;
}

#mega_menu a
{
    font:normal 16px Roboto;
    display:block;
    color:#000000;
    text-decoration:none;
    line-height:33px;
    position:relative;           
}

#mega_menu li:first-child a
{
    border-top:0;
}

#mega_menu a.arrow::after{
    content:'';
    position:absolute;
    display:inline;
    top:50%;
    margin-top:-4px;
    right:8px;
    border-width:4px;
    border-style:solid;
    border-color:transparent transparent transparent black;
    transition:border-color 0.5s;  
}
                
#mega_menu li a.arrow:hover::after
{
    border-color:transparent transparent transparent red;
}
        
/*Sub level menu items
---------------------------------------*/
#mega_menu li ul
{
    min-width:180px; /* Sub level menu min width */
    position:absolute;
    display:none;
    left:100%;
	top:0;
    /*top:150%; transform:translateY(-50%); --> điều chỉnh % submenu*/
	z-index:999;
}

#mega_menu li:hover > ul
{
    display:block;
}