diff --git a/src/app/styles/app.css b/src/app/styles/app.css
index adb7fe0..dc3f313 100644
--- a/src/app/styles/app.css
+++ b/src/app/styles/app.css
@@ -91,7 +91,6 @@
   --space-4xl: 4rem;
 
   /* Typography Scale */
-  --text-2xs: 0.625rem;
   --text-xs: 0.75rem;
   --text-sm: 0.875rem;
   --text-base: 1rem;
@@ -205,6 +204,14 @@
   --font-mono: 'Space Mono', monospace;
   --font-primary: 'Space Grotesk', system-ui, -apple-system, 'Segoe UI', Inter, Roboto, Arial, sans-serif;
   --font-secondary: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, Arial, sans-serif;
+
+  /* Micro typography scale — extends Tailwind's text-xs (0.75rem) downward */
+  --font-size-5xs: 0.4375rem;
+  --font-size-4xs: 0.5rem;
+  --font-size-3xs: 0.5625rem;
+  --font-size-2xs: 0.625rem;
+  /* Monospace label tracking — used in Loader and Footnote */
+  --tracking-wider-mono: 0.2em;
 }
 
 @layer base {