nav.powerlistmenu{
    position: absolute;
    width: 200px; /* width of menu. Percentage value accepted */
    height: 750px; /* height of menu */
    overflow: hidden;	
}

nav.powerlistmenu div.loadingscreen{ /* DIV that temporarily covers menu while Ajax content being fetched */
    position: absolute;
    z-index: 1001;
    width: 100%;
    height: 100%;
    background: black;
    color: white;
    font-weight: bold;
    opacity: 0.7;
    text-align: center;
    vertical-align: middle;
}

nav.powerlistmenu div.loadingscreen > *{ /* center any text/ image inside this DIV */
    position: relative;
    top: 50%;
    transform: translateY(-50%);
}

nav.powerlistmenu div.drawer{ /* DIV that surrounds each UL after being flattened */
    position: absolute;
    width: 100%;
    height: 100%;
    list-style: none;
    margin: 0;
    padding: 0;
    overflow-y: auto; /* set y overflow to scroll if needed */
    left: 0;
    top: 0;
    background: #eeeeee;
    font-weight: bold;
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    box-sizing: border-box;
}

nav.powerlistmenu div.drawer.submenu{ /* Targets all but top level UL menu */

}

nav.powerlistmenu div.drawer div.breadcrumb{ /* Breadcrumb DIV that gets added to top of each sub level UL menu */
    position: relative;
    padding: 10px;
    border-bottom: 1px solid gray;
    background: #aa0000;
    color: #ffffff;
    font-weight: bold;
    cursor: pointer;
}

nav.powerlistmenu div.drawer div.breadcrumb span.left{ /* SPAN inside breadcrumb containing "left" arrow markup */
    margin-right: 5px;
    font-weight: bold;
    font-size: 1.5em;
    color: #ffffff;
}

nav div.drawer ul{
    margin: 0;
    padding: 0;
    list-style: none;
}

nav.powerlistmenu div.drawer ul li{

}

nav.powerlistmenu div.drawer ul li a{
    text-decoration: none;
    display: block;
    padding: 10px;
    color: black;
    border-bottom: 1px solid #eee;
}

nav.powerlistmenu div.drawer ul li a:hover{
    background: #444444;
    color: #ffffff;
}

nav.powerlistmenu div.drawer ul li a span.right{ /* SPAN inside LI headers containing "right" arrow markup */
    position: absolute;
    right: 8px;
    font-weight: bold;
    font-size: 1.1em;
}