Gameboy Advance iPhone Duo support

Layout (unfolded, portrait):

• Top half: The GBA screen fills the width at its native 3:2 ratio, with a slim indigo outline. There's a bit of space above it for the top edge and a gap above the fold, so nothing sits on the hinge.
• Bottom half: L and R shoulder buttons are at the top. Between them are small Menu and Fast-Forward buttons.
• Controls: The D-pad is on the left. A and B are on the right, with A slightly higher than B like a real GBA. Select and Start are tilted pills at the bottom, above the home indicator.
• Look: The skin uses the same purple as your current one. The top half is pure black, and the fold line is a subtle shadow with a thin highlight.