riot-web/res/themes/legacy-light/css/_fonts.scss

/*
 * Nunito.
 * Includes extended Latin and Vietnamese character sets
 * Current URLs are taken from
 * https://github.com/alexeiva/NunitoFont/releases/tag/v3.500
 * ...in order to include cyrillic.
 *
 * Previously, they were
 * https://fonts.googleapis.com/css?family=Nunito:400,400i,600,600i,700,700i&subset=latin-ext,vietnamese
 *
 * We explicitly do not include Nunito's italic variants, as they are not italic enough
 * and it's better to rely on the browser's built-in obliquing behaviour.
 */

// Grab the other fonts from the current theme, so we can override to Inter
// in custom fonts if needed.
@import "../../light/css/_fonts.scss";

// Nunito as the default, for old time's sake on legacy themes.
/* the 'src' links are relative to the bundle.css, which is in a subdirectory.
 */
@font-face {
    font-family: 'Nunito';
    font-style: normal;
    font-weight: 400;
    src: url('$(res)/fonts/Nunito/Nunito-Regular.ttf') format('truetype');
}
@font-face {
    font-family: 'Nunito';
    font-style: normal;
    font-weight: 600;
    src: url('$(res)/fonts/Nunito/Nunito-SemiBold.ttf') format('truetype');
}
@font-face {
    font-family: 'Nunito';
    font-style: normal;
    font-weight: 700;
    src: url('$(res)/fonts/Nunito/Nunito-Bold.ttf') format('truetype');
}