.dropdown-container,
.dropdown-overlay {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
}

.dropdown-container {
    z-index: 1050;
}

/**
 * 1. Make sure the dialog container and all its descendants are not
 *    visible and not focusable when it is hidden.
 */
.dropdown-container[aria-hidden='true'] {
    display: none; /* 1 */
}

.dropdown-submenu {
    position:relative;
}
.dropdown-submenu>.dropdown-menu {
    top:0;
    left:100%;
    margin-top:-6px;
    margin-left:-1px;
    -webkit-border-radius:0 6px 6px 6px;
    -moz-border-radius:0 6px 6px 6px;
    border-radius:0 6px 6px 6px;
}
.dropdown-submenu>a:after {
    display:block;
    content:" ";
    float:right;
    width:0;
    height:0;
    border-color:transparent;
    border-style:solid;
    border-width:5px 0 5px 5px;
    border-left-color:#cccccc;
    margin-top:5px;
    margin-right:-10px;
}
.dropdown-submenu:hover>a:after {
    border-left-color:#ffffff;
}
.dropdown-submenu.disabled:hover>a:after {
    border-left-color:#ccc;
}