diff --git a/.jules/palette.md b/.jules/palette.md
new file mode 100644
index 0000000..77a34f9
--- /dev/null
+++ b/.jules/palette.md
@@ -0,0 +1,3 @@
+## 2024-05-06 - Interactive Element Accessibility in Global Navigation
+**Learning:** Disclosure widgets (like mobile menus and dropdowns) in global navigation often lack `aria-expanded` attributes, making their state opaque to screen readers. Additionally, icon-only buttons frequently lack explicit focus rings, rendering them inaccessible to keyboard users.
+**Action:** Always include `aria-expanded` on any interactive disclosure widget and ensure explicit `focus-visible` styles (e.g., `focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-accent-500`) are applied to all interactive elements, particularly icon-only buttons.
diff --git a/src/components/layout/Navbar.jsx b/src/components/layout/Navbar.jsx
index de3fea5..3fee993 100644
--- a/src/components/layout/Navbar.jsx
+++ b/src/components/layout/Navbar.jsx
@@ -95,7 +95,9 @@ const Navbar = () => {
             <div className="relative" ref={dropdownRef}>
               <button
                 onClick={toggleDropdown}
-                className={`flex items-center space-x-1 px-3 py-2 rounded-md text-sm font-medium transition-colors duration-200 ${location.pathname.startsWith('/forum')
+                aria-expanded={isDropdownOpen}
+                aria-haspopup="menu"
+                className={`flex items-center space-x-1 px-3 py-2 rounded-md text-sm font-medium transition-colors duration-200 focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-accent-500 ${location.pathname.startsWith('/forum')
                     ? 'text-accent-500 bg-accent-50 dark:bg-navy-800'
                     : 'text-gray-700 dark:text-slate-300 hover:text-accent-500 hover:bg-gray-50 dark:hover:bg-navy-800'
                   }`}
@@ -139,7 +141,7 @@ const Navbar = () => {
             {/* Theme Toggle Button */}
             <button
               onClick={toggleTheme}
-              className="p-2 rounded-lg text-gray-600 dark:text-slate-300 hover:bg-gray-100 dark:hover:bg-navy-800 transition-all duration-300"
+              className="p-2 rounded-lg text-gray-600 dark:text-slate-300 hover:bg-gray-100 dark:hover:bg-navy-800 transition-all duration-300 focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-accent-500"
               aria-label={isDark ? 'Switch to light mode' : 'Switch to dark mode'}
             >
               <FontAwesomeIcon
@@ -161,7 +163,7 @@ const Navbar = () => {
             {/* Theme Toggle - Mobile */}
             <button
               onClick={toggleTheme}
-              className="p-2 rounded-lg text-gray-600 dark:text-slate-300 hover:bg-gray-100 dark:hover:bg-navy-800 transition-colors duration-200"
+              className="p-2 rounded-lg text-gray-600 dark:text-slate-300 hover:bg-gray-100 dark:hover:bg-navy-800 transition-colors duration-200 focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-accent-500"
               aria-label={isDark ? 'Switch to light mode' : 'Switch to dark mode'}
             >
               <FontAwesomeIcon
@@ -172,7 +174,10 @@ const Navbar = () => {
 
             <button
               onClick={toggleMobile}
-              className="text-gray-700 dark:text-slate-300 hover:text-accent-500 p-2"
+              aria-expanded={isOpen}
+              aria-controls="mobile-menu"
+              aria-label="Toggle mobile menu"
+              className="text-gray-700 dark:text-slate-300 hover:text-accent-500 p-2 focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-accent-500 rounded-lg"
             >
               <FontAwesomeIcon icon={isOpen ? faTimes : faBars} className="text-xl" />
             </button>
@@ -180,7 +185,7 @@ const Navbar = () => {
         </div>
 
         {/* Mobile Navigation */}
-        <div className={`md:hidden transition-all duration-300 ease-in-out ${isOpen ? 'max-h-screen opacity-100' : 'max-h-0 opacity-0 overflow-hidden'}`}>
+        <div id="mobile-menu" className={`md:hidden transition-all duration-300 ease-in-out ${isOpen ? 'max-h-screen opacity-100' : 'max-h-0 opacity-0 overflow-hidden'}`}>
           <div className="px-2 pt-2 pb-3 space-y-1 bg-white dark:bg-navy-900 border-t border-gray-200 dark:border-navy-700">
             {navLinks.map((link) => (
               <Link