#helpPopup {
    width: 600px;
    margin-left: -323px;
    height: auto;
    overflow: auto;
}

.helpIcon {
    vertical-align: middle;
    margin-top: auto;
    margin-bottom: auto;
    height: 1em;
    margin-left: .5em
}

@media(max-width: 768px) {
    #helpPopup {
        width: auto;
        margin-left: 0;
    }
}