an-anime-game-launcher/assets/ui/first_run.blp

using Gtk 4.0;
using Adw 1;

Adw.ApplicationWindow window {
    default-width: 780;
    default-height: 560;

    content: Adw.ToastOverlay toast_overlay {
        Gtk.Box {
            orientation: vertical;

            Adw.HeaderBar {
                title-widget: Adw.WindowTitle {
                    title: "An Anime Game Launcher";
                };
            }

            Adw.Carousel carousel {
                allow-mouse-drag: false;
            }

            Adw.CarouselIndicatorDots {
                carousel: carousel;
                height-request: 32;
            }
        }
    };
}