music_library/lib/music_library_web/components/layouts/app.html.heex

<main class="px-4 py-20 max-sm:py-4 sm:px-6 lg:px-8">
  <div class="mx-auto max-w-5xl">
    <.flash_group flash={@flash} />
    <%= @inner_content %>
  </div>
</main>