A mobile app screenshot for an Android photography application called "Darkroom". Portrait orientation (1080x2340 resolution). STRICTLY monochromatic color scheme using ONLY shades of gray from pure black (#000000) to pure white (#FFFFFF), absolutely NO colors allowed. Material Design 3 style. Top app bar: dark gray (#1A1A1A) background, white text "Darkroom" on left, settings gear icon and search icon on right. Main content: Horizontal scrolling film strip of black and white photography thumbnails with sprocket holes decoration (like analog film). Show 5-6 thumbnail images of landscapes and portraits in grayscale. Each thumbnail 100dp square with 8dp spacing, subtle drop shadow. Large circular floating action button (FAB) in bottom right with white "+" icon on dark gray background (#2B2B2B). Bottom navigation bar: 5 icons (Gallery, Editor, Camera, Presets, More) in light gray with Gallery selected in white. Style: Clean, minimal, professional photography app, Material 3, exclusively grayscale palette, dark theme optimized for OLED, film photography aesthetic. See more