Mobile game UI mockup, vertical screen. Minimalist zen puzzle interface with soft neutral colors. Top section: small target preview box centered, white card (#FFFFFF) with very subtle shadow (rgba(0,0,0,0.06)), thin border (#E7E7E7), containing a faint abstract shape shown as a translucent silhouette (20% opacity, rgba(0,0,0,0.20)). Background color #F5F5F5. Middle section: large composition area on a white rounded rectangle card (#FFFFFF), thin border #E7E7E7, subtle shadow. Inside, a layered abstract geometric shape in dark graphite gray (#3A3A3A) and soft desaturated blue (#9BB4C6), representing superimposed puzzle pieces. Below: selected layers row. Three small rectangular cards with rounded corners, evenly spaced. Cards white (#FFFFFF), borders #E7E7E7, icons of geometric shapes inside in graphite gray (#3A3A3A). A small accent highlight bar or dot in soft blue (#9BB4C6) marking them as active. Bottom section: available pieces row. White rounded cards with geometric shape icons, some marked active with a blue check (#9BB4C6), others inactive with a soft gray X (#DADADA). Clean, airy spacing, subtle shadows. Typography: thin, modern, light gray text (#8A8A8A). Overall atmosphere: calm, balanced, Japanese-inspired minimalism, lots of white space, soft lighting, no strong colors. No phone frame, no branding. High-resolution UI render, flat modern style, soft shadows, clean layout. See more