fix(header): Fix inline menu items and theme switch icon styling

partials/header.hbs

@@ -5,7 +5,7 @@
         </a>
 
         <div class="flex items-center">
-            <nav class="hidden md:flex flex-wrap items-center text-base justify-center">
+            <nav class="hidden md:flex flex-wrap items-center justify-center">
                 {{navigation type="primary"}}
                 <button id="theme-toggle" class="ml-4 p-2 rounded-full bg-[var(--bg-secondary)] text-[var(--text-primary)] hover:bg-[var(--bg-tertiary)] transition-colors duration-200">
                     <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="currentColor" class="w-5 h-5">