Design a modern bedframe scaled for a 1:6 scale Barbie doll, inspired by the clean-lined bedframe with integrated shelves. Include: (1) a tall headboard with side shelving on both ends, (2) a separate footboard with simple modern design, (3) mattress side rails that connect between headboard and footboard, and (4) a lightly tufted mattress insert that fits the frame. The shelving should match the look of the reference image, scaled down, and all components should snap together using pegs or slots. Place all pieces side by side in the same file. Optimize for FDM printing with no supports.