A sophisticated and minimalist logo for a publishing house named "Yûbunka". The logo is an abstract, geometric monogram combining the letters 'Y' and 'B'. The design is styled like architectural origami with clean, sharp folded paper facets and sharp angles, strictly avoiding any butterfly or bird shapes. The monogram is rendered in shades of matte terracotta, burnt orange, and warm saffron to create a subtle 3D relief with soft shadows. Isolated on a solid, clean charcoal dark grey background. Luxury branding aesthetic, vector style, elegant, high-end, premium quality. Ver mais