diff --git a/theme.css b/theme.css
index d4eebde..bb30969 100644
--- a/theme.css
+++ b/theme.css
@@ -168,6 +168,12 @@
     --font-sans: "Inter", "Inter Variable", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
     --font-heading: "Instrument Sans", "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
     --font-mono: "Geist Mono", ui-monospace, SFMono-Regular, Menlo, "Cascadia Mono", Consolas, monospace;
+
+    /* Tailwind utility families. Distinct names so a consuming app's
+     * `@theme inline` can indirect to these (--font-heading/--font-sans collide
+     * with Tailwind's own font-* namespace). Mirror --font-heading/--font-sans. */
+    --heading-family: "Instrument Sans", "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
+    --body-family: "Inter", "Inter Variable", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
 }
 
 /*