/* 
	LEVEL ONE
*/
#nav{position:relative; z-index:101;}
ul.dropdown                         {width:100%;}
ul.dropdown li                      { font-weight: normal; float: left; zoom:1; background:none; padding:0; text-align:center;}
ul.dropdown a:hover		            { color: #fff; }
ul.dropdown a:active                { color: #fff; }
ul.dropdown li a                    { padding:11px 12px 12px;	display: block; color: #fff; }
ul.dropdown li a:hover{background:none;}
ul.dropdown li:last-child a         { border-right: none; } /* Doesn't work in IE */
ul.dropdown li.hover,
ul.dropdown li:hover                { background:url(../images/nav-bg.png) repeat-x left -46px; }
ul.dropdown li.hover a              { color: #fff; background:none; }


/* 
	LEVEL TWO
*/
ul.dropdown li ul{margin:0; padding:15px 35px;}
ul.dropdown ul{ width:161px; visibility: hidden; position: absolute; top:100%; left: 0; background:#f77f00;}
ul.dropdown ul li { font-weight: normal; text-align:left;}
ul.dropdown ul li:hover{background:none;}
                                    /* IE 6 & 7 Needs Inline Block */
ul.dropdown ul li a{}
/* 
	LEVEL THREE
*/
ul.dropdown ul ul 					{ left: 0; top: 0; }
ul.dropdown li:hover > ul 			{ visibility: visible; }





#nav ul li {position:relative;}
#nav ul li ul.sub_menu li{width:100%; float:none; padding:0;}
#nav ul li ul.sub_menu li a{float:none; width:auto; display:inline-block; padding:3px 15px 2px 0; text-align:left; font-family:'GibsonRegular', Arial; font-size:13px; line-height:18px; height:auto; text-transform:uppercase;}
#nav ul li ul.sub_menu li a span{text-transform:lowercase;}
#nav ul li ul.sub_menu li a:hover{background:url(../images/dropdown-bullet.gif) no-repeat right 50%; text-decoration:underline;}

#nav ul li a.selected{background:url(../images/nav-bg.png) repeat-x left -46px;}

ul.dropdown li.about{width: 231px;}
ul.dropdown li.about ul{width:161px;}
ul.dropdown li.understanding{width:305px;}
ul.dropdown li.understanding ul{width:235px;}
ul.dropdown li.involved{width:190px;}
ul.dropdown li.involved ul{width:120px;}
ul.dropdown li.research{width:250px;}
ul.dropdown li.research ul{width:180px;}