The page currently uses a background image (bg.jpeg). I'll replace that with a rich, deep-toned background color that complements the frosted glass authentication card.

Now let me also make sure the AuthCard sits above the background layers with a relative z-index:

The auth card already has relative implicitly working, but let me ensure it renders above the radial gradient overlay by adding relative z-10 to the card wrapper:

I replaced the background image with a rich dark gradient that flows from deep navy (#0f172a) through slate (#1e293b) to a teal accent (#0f766e), and added subtle radial glows of cyan and violet for depth. The frosted glass auth card now sits prominently against this moody, layered background with proper z-index stacking to ensure it renders above the decorative gradient overlays.