#w { display: block; margin:auto; }

/* nav menu styles */
#nav { display: block; }
    #nav li { margin:1px 0; }
        #nav li div{ margin:0; padding:10px; display: none; background:#cfcfcf; color:#000; }
    #nav > li > h4 {
        display: block;
        margin:0;
        padding: 10px 15px;
        font: normal 14px tahoma;
        color: #000000;
        text-align: left;
        background: #aaaaaa;
        cursor: pointer;
    }
        #nav > li > h4:hover, #nav > li > h4.open {
            color: #000000;
            background: #888888;
            -webkit-transition: all 0.3s ease-in;
            -moz-transition: all 0.3s ease-in;
            -ms-transition: all 0.3s ease-in;
            -o-transition: all 0.3s ease-in;
            transition: all 0.3s ease-in;
        }