Design a professionally crafted mobile app icon for the App Type, centered on the Symbol. Use the Style and Color Palette with a smooth, controlled two-tone gradient and a clean white glyph. Keep one strong, simple silhouette with generous padding inside the central 80 percent, readable even at 60 pixels. Follow one consistent light direction from the top and use no more than two or three colors. Produce the Variant as three identical square icons side by side on a plain neutral background, evenly spaced: light as the standard icon, dark with a dark base and the glyph in color, and tinted with a monochrome grayscale glyph on dark. Each icon must be a perfect 1:1 square filling its own frame edge to edge, with no rounded corners, device frame, mockup, outside shadow, border or internal text. Avoid sparkles, glow, lens flares, busy backgrounds, extra objects, photographic detail, random letters and resemblance to existing app icons or logos. No watermark.
Use these details:
App Type: "QR scanner"
Symbol: "QR corner brackets glyph"
Style: "Gradient icon"
Color Palette: "vivid blue two-tone gradient with white glyph"
Variant: "Light, dark and tinted set"
Using your own logo, product or face? Attach it in the chat and say which of the details it replaces.
Your result will come out close to the example rather than identical to it. Change the details to make it yours.
