.hw-back-to-top {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    width: 3rem;
    height: 3rem;
}

.hw-back-to-top i.fa.fa-chevron-up{
    position: static;
    font-size: 2.75rem;
}

@media (min-width: 768px) {
    .hw-back-to-top {
        width: 4rem;
        height: 4rem;
    }
    .hw-back-to-top i.fa.fa-chevron-up{
        font-size: 3.75rem;
    }

}