.fi {
    position: relative;
    display: inline-block;
    width: 1.333333em;
    height: 1em;
    background-size: contain;
    background-position: 50%;
    background-repeat: no-repeat;
}

.fi-es {
    background-image: url("../images/flags/es.svg");
}

.fi-gb {
    background-image: url("../images/flags/gb.svg");
}

.fi-br {
    background-image: url("../images/flags/br.svg");
}

.fi-sa {
    background-image: url("../images/flags/sa.svg");
}