:root{
--bs-font-sans-serif:"Mulish-Regular";
}
<style>
@font-face {
    font-family: 'Mulish-Regular';
    font-style: normal;
    font-weight: 400;
    src: url('http://marktplaats-tradein.renewd.com/wp-content/uploads/sites/185/2024/03/Mulish-Regular-1.woff2') format('woff2');
}
</style>