feat(tailwind): use Karla fonts for sans font

assets/stylesheets/tailwind.css

@@ -1,5 +1,9 @@
 @import "tailwindcss";
 
+@theme {
+  --font-sans: "Karla", sans-serif;
+}
+
 @layer base {
   @font-face {
     font-family: "Cal Sans";