Why tailwind doesnt work in filament pages?

i created a page:

php artisan make:filament-page Settings

php artisan make:filament-page Settings

then i added this in the view:

<x-filament-panels::page>
    <p class="bg-red-500">
        should i be red?
    </p>
</x-filament-panels::page>

<x-filament-panels::page>
    <p class="bg-red-500">
        should i be red?
    </p>
</x-filament-panels::page>

but i dont see it red. i did npm run build to test if that fixes it, but doesnt