.fa-background:before,
.fab-background:before,
.far-background:before,
.fas-background:before {
    -webkit-font-smoothing: antialiased;
    display: inline-block;
    font-style: normal;
    font-variant: normal;
    text-rendering: auto;
    line-height: 1;

    position: absolute;
    bottom: -1rem;
    right: -1rem;
    font-size: 8rem;
    color: white;
    opacity: .15;
}

.fa-background:before,
.far-background:before,
.fas-background:before {
    font-family: 'Font Awesome\ 5 Free';
    font-weight: 400;
}

.fas-background:before {
    font-weight: 900;
}

.fab-background:before {
    font-family: 'Font Awesome\ 5 Brands';
}