Premium 3D isometric Sudoku puzzle icon, authentic Sudoku board with a mathematically valid Sudoku puzzle, correct number placement following official Sudoku rules, 9x9 grid divided into 3x3 subgrids, partially completed puzzle with realistic distribution of digits, no duplicate numbers in any row, column, or 3x3 box, glossy rounded tiles, futuristic neon glow, blue and white color palette, subtle green underlighting, floating platform, ultra-clean mobile game icon, soft reflections, depth, shadows, premium casual game art, App Store featured quality, centered composition, dark gradient background, octane render, highly detailed, masterpiece, 4K