Fix z-index issues

src/components/NavigationDropdown.tsx

@@ -109,7 +109,7 @@ export function NavigationDropdown() {
       </button>
       <div
         className={cn(
-          'pointer-events-none invisible absolute left-0 top-full z-[999] mt-2 w-48 min-w-[320px] -translate-y-1 rounded-lg bg-slate-800 py-2 opacity-0 shadow-xl transition-all duration-100',
+          'pointer-events-none invisible absolute left-0 top-full z-[90] mt-2 w-48 min-w-[320px] -translate-y-1 rounded-lg bg-slate-800 py-2 opacity-0 shadow-xl transition-all duration-100',
           {
             'pointer-events-auto visible translate-y-2.5 opacity-100':
               $navigationDropdownOpen,

src/components/RoadmapDropdownMenu/RoadmapDropdownMenu.tsx

@@ -64,7 +64,7 @@ export function RoadmapDropdownMenu() {
       </button>
       <div
         className={cn(
-          'pointer-events-none invisible absolute left-0 top-full z-[999] mt-2 w-48 min-w-[320px] -translate-y-1 rounded-lg bg-slate-800 py-2 opacity-0 shadow-2xl transition-all duration-100',
+          'pointer-events-none invisible absolute left-0 top-full z-[90] mt-2 w-48 min-w-[320px] -translate-y-1 rounded-lg bg-slate-800 py-2 opacity-0 shadow-2xl transition-all duration-100',
           {
             'pointer-events-auto visible translate-y-2.5 opacity-100':
               $roadmapsDropdownOpen,