@font-face {
    font-family: 'jost';
    src: url('jost-400-book.woff2') format('woff2'),
         url('jost-400-book.woff') format('woff'),
         url('jost-400-book.ttf') format('truetype');
    font-weight: normal;
    font-style: normal;
}

@font-face {
    font-family: 'jost';
    src: url('jost-600-semi.woff2') format('woff2'),
         url('jost-600-semi.woff') format('woff'),
         url('jost-600-semi.ttf') format('truetype');
    font-weight: bold;
    font-style: normal;
}