wip

packages/tailwindcss/src/plugin-api.ts

@@ -420,6 +420,10 @@ function createCompatabilityConfig(theme: Theme): UserConfig {
       transitionTimingFunction: {
         DEFAULT: theme.get(['--default-transition-timing-function']) ?? null,
       },
+      fontFamily: {
+        DEFAULT: theme.get(['--default-font-family']) ?? null,
+        mono: theme.get(['--default-mono-font-family']) ?? null,
+      },
 
       zIndex: {
         [BARE_VALUE]: (value: string) => {

packages/tailwindcss/src/theme.ts

@@ -270,6 +270,7 @@ export type ThemeKey =
   | '--translate'
   | '--width'
   | '--z-index'
+  | `--default-${string}`
 
 export type ColorThemeKey =
   | '--color'