Create an ethereal, high-fidelity digital artwork capturing the essence of Blue

Create an ethereal, high-fidelity digital artwork capturing the essence of Blue Hour, featuring a distant, solitary cat, optimized for a smartphone wallpaper (aspect ratio 9:20, resolution 1080x2400 pixels). Use Adobe Photoshop CC 2023 with custom Python scripts for procedural generation. Sky composition (70% of image height): Implement a physically-based sky model using Rayleigh and Mie scattering algorithms. Color gradient: Deep indigo (HSL: 240°, 80%, 15%) at horizon, transitioning to rich cerulean (HSL: 200°, 75%, 30%) at center, fading to steel blue (HSL: 210°, 40%, 60%) at top. Add 150-200 stars with Gaussian distribution, sizes ranging 1-3px, brightness 50-80% opacity. Celestial body (positioned at top-right third intersection): Rising crescent moon, 5% of image width, using accurate lunar phase model. Color: Cool white (HSL: 220°, 10%, 95%) with subtle blue rim lighting. Implement accurate lunar limb darkening effect. Foreground (lower 30% of image): Minimalist landscape silhouette using Perlin noise algorithm for natural contours. Color gradient: Deep blue-black (HSL: 240°, 70%, 5%) at base, transitioning to (HSL: 240°, 60%, 10%) at horizon. Add subtle fractals (0.5% opacity) for texture, simulating distant foliage or structures. Cat placement: Position cat silhouette at 2% of image height, placed 1/5 of the way up from the bottom, 1/3 from the left edge. Use bezier curves for smooth, natural feline contours. Apply 50% feathering (2px radius) to silhouette edges for softer integration. Atmospheric effects: Implement volumetric lighting using ray marching technique, emanating from moon position. Add subtle airglow effect near horizon (HSL: 160°, 40%, 20%, opacity 10%). Simulate light pollution with a soft radial gradient (HSL: 180°, 20%, 15%, opacity 5%) at horizon. Clouds: Generate 3-5 cirrus clouds using Fractal Brownian Motion algorithm. Color: Slight purple tinge (HSL: 270°, 30%, 70%) on edges, blending to sky color. Opacity ranging from 20% to 40

Exclude any human elements, recognizable landmarks, or multiple animals. Avoid warm color tones, harsh lines, over-saturation, or elements that disrupt the serene blue hour atmosphere. Prevent any text, logos, or identifiable shapes in clouds or landscape. Eliminate any signs of modern technology or urban environments beyond the subtle suggestion of distant light pollution.