Combining two font awesome icons

combined-icons.scss

/*
 *  Use it in pug:
 *
 *  span.fa-stack.combined-icons
 *      i.fa.fa-map.fa-stack-2x.awesomeEntity
 *      i.fa.fa-heartbeat.fa-stack-1x.awesomeAction
 */

.combined-icons{
    display: block;
    margin: 0 auto;
}

.fa{
    text-shadow: 1px 1px 2px #000;
}

.awesomeEntity, .awesomeAction {
    color: white;
}
.awesomeEntity {
    font-size: 4rem;
    text-shadow: 1px 1px 2px #000;
}
.awesomeAction {
    font-size: 100%;
    margin: 10% 0 0 30%;
    text-shadow: -1px 0 black, 0 2px 3px black, 2px 0 3px black, 0 -1px black;
}

/* awesomeBlue */
span.awesomeBlue i {
    color: #2E5888;
}
span.awesomeBlue i.awesomeAction {
    text-shadow: -1px 0 white, 0 2px 3px black, 2px 0 3px black, 0 -1px white;
}