@font-face {
    font-family: Avenir-bold;
    src: url('fonts/Avenir-Black.otf');
}
@font-face {
    font-family: Avenir-light;
    src: url('fonts/Avenir-Light.otf');
}
@font-face {
    font-family: Avenir-heavy;
    src: url('fonts/Avenir-Heavy.otf');
}
@font-face {
    font-family: Avenir;
    src: url('fonts/Avenir-Book.otf');
}