.nav li > a > span {
    /* float: right; */
    position: absolute;
    font-size: 1em;
    font-weight: bolder;
    padding: .3em 1em .6em 1em;
    right: 0;
    top: 0;
}

.nav li > a:hover > span {
    color: #fff;
}

.nav li > a > span:after {
    content: '\002B'; /*'\25be';*/
}
.nav li.open > a > span:after {
    content:  '\002D'; /*'\25b4';*/
}