@font-face {
   font-family: 'Avenir-Heavy';
   font-display: swap;
   src: url('Avenir-Heavy/font.ttf');
}
@font-face {
   font-family: 'Helvetica-LT-Std-Roman';
   font-display: swap;
   src: url('Helvetica-LT-Std-Roman/font.woff');
}