Still working on upgrading to Tailwind CSS v4 an dSkeleton v3.....

src/routes/core/+layout.svelte

@@ -5,7 +5,6 @@ let log_lvl: number = 0;
 // *** Import Svelte specific
 // import { goto } from '$app/navigation';
 // import type { Writable } from 'svelte/store';
-// import { localStorageStore } from '@skeletonlabs/skeleton';
 
 // *** Import Aether specific variables and functions
 // import type { key_val } from '$lib/ae_stores';
@@ -50,7 +49,7 @@ if (log_lvl) {
     class:hidden={$ae_loc.iframe}
     >
 
-    <span class="btn-group variant-soft-secondary px-4 py-2">
+    <span class=" preset-tonal-secondary px-4 py-2">
     {#each Object.entries(data.submenu) as [key, item]}
         <!-- <a href="/settings/{item.slug}">{item.title}</a> -->
         <!-- class:hidden={!$ae_loc.trusted_access && item.access} -->