@font-face {
    font-family: 'FiraSans';
    src: url(FiraSansOT-Regular.otf);
    font-weight: normal;
}
@font-face {
    font-family: 'FiraSans';
    src: url(FiraSansOT-Medium.otf);
    font-weight: 500;
}
@font-face {
    font-family: 'FiraSans';
    src: url(FiraSansOT-Light.otf);
    font-weight: 300;
}
@font-face {
    font-family: 'FiraSans';
    src: url(FiraSansOT-Bold.otf);
    font-weight: 700;
}