Gumroad style icon

Create a high-resolution illustration of a [OBJECT] icon in the style of a flat, outlined sticker graphic. The icon should be made entirely from very thin, solid black outlines with no interior fill. Add a bold, soft-edged sticker-style contour around the icon using a flat, vibrant [YELLOW, BLUE, OR PINK] color. The result should look like a cartoon-style icon cut from black paper, outlined by a bright color. Do not use any white or filled shapes inside. No gradients, no shadows, no textures. Vector-friendly. Black background. Square aspect ratio.