@font-face {
    font-family: "Avenir-Black";
    src: url("Avenir-Black.ttf") format("embedded-opentype");
}
@font-face {
    font-family: "Avenir-Book";
    src: url("Avenir-Book.ttf") format("embedded-opentype");
}
@font-face {
    font-family: "Avenir-Medium";
    src: url("Avenir-Medium.ttf") format("embedded-opentype");
}