restructure theme css

go/tw/tailwind.go

@@ -1269,6 +1269,14 @@ var defaultThemeCSS string
 //go:embed tw_preflight.css
 var defaultPreflightCSS string
 
+// kjolThemeCSS is the shared kjol extension layer — the semantic design tokens
+// (surface/line/ink/...), the class-based dark variant, the chart palette and the
+// :root icon vars. It sits between Tailwind's defaults and an app's brand, and is
+// prepended to the app entry stylesheet by CompileApp / CompileAppFiles.
+//
+//go:embed kjol_theme.css
+var kjolThemeCSS string
+
 func parseThemeOptions(params string) ThemeOptions {
 	o := themeNone
 	for _, f := range strings.Fields(params) {