I changed the original boot screen into a proper login screen because I wanted Nebula OS to feel more like an actual desktop environment when someone first opens it. The new screen has the date, a sign-in button, a quote, and a small build label before entering the desktop.

I changed the topbar from a solid background to a translucent glass-style design. This makes it blend more naturally with the wallpaper instead of looking like a separate bar placed on top of the desktop.

I also changed the dock to match the translucent style of the topbar. The desktop previously used a plain color as its background, so I added a default wallpaper image instead. This gives new users something more visually interesting when they first open Nebula OS, while still letting them replace the wallpaper with their own image.