/*
  Self-hosted two-font system shared by every surface on the site: the
  Jekyll pages themselves (_includes/head_custom.html), the reveal.js
  decks (assets/css/revealjs-decks.css), and the printable worksheet
  PDFs (worksheet-sources/worksheet.css). One file, so the three never
  drift apart again.

  Font files are self-hosted (assets/fonts/, Latin-subset only) rather
  than pulled from Google Fonts at request time: the worksheet PDFs are
  rendered once by a headless-Chromium/Playwright script reading these
  files straight off disk (file:// URLs, no network round trip needed),
  and the site/decks get the same reliability plus one fewer external
  dependency.

  Inter -- UI/body sans, everywhere.
  Instrument Serif -- display serif, for headings and titles only.
*/
@font-face {
  font-family: "Inter";
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url("../fonts/Inter-Variable-latin.woff2") format("woff2");
}
@font-face {
  font-family: "Instrument Serif";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("../fonts/InstrumentSerif-Regular-latin.woff2") format("woff2");
}
@font-face {
  font-family: "Instrument Serif";
  font-style: italic;
  font-weight: 400;
  font-display: swap;
  src: url("../fonts/InstrumentSerif-Italic-latin.woff2") format("woff2");
}