Minimalist Single Line Social Media Avatar

Please convert the input image into a minimalist single-line-art illustration suitable for use as a social media avatar, with a default aspect ratio of 1:1. The subject can be a person, a cat, a dog, another animal, or a plant. Based on the type of subject in the input, automatically extract the most recognizable outer silhouette and key features, and distill them into an artistic, minimalist single-line avatar / portrait illustration. The overall goal is not mechanical outlining, but rather preserving the subject's essence and recognizability, reconstructing it as a single line in a more refined, more inspired way. 【Subject-Handling Logic】If the subject is a person: preserve key contours such as the face shape, forehead, nose bridge, the turn of the mouth, chin, ears, and hairstyle, keeping only a small number of necessary facial features and avoiding overly fussy detail. If the subject is a cat, dog, or other animal: preserve key identifying features such as the head shape, ears, the outline of the muzzle, the look in the eyes, and the general direction of the fur's silhouette, avoiding complex fur detail. If the subject is a plant: preserve the most recognizable formal features among the flowers, leaves, branches, fruit, or overall silhouette, using concise lines to capture its posture and rhythm. 【Line-Style Requirements】The lines must be smooth, rounded, relaxed, expressive, and natural — as continuous as possible, done in one confident stroke, with a sense of breath and spontaneity. The overall look should mainly use soft curves, with sharp, stiff, rigid angular lines kept to a minimum. Do not draw the outline as a rigid, logo-like line trace; avoid anything mechanical, stiff, fragmented, or overly uniform. The lines should be simple yet full of life, carrying a touch of spontaneity and artistic character, and should look relaxed, lively, and collectible. 【Composition and Avatar-Fit Logic】Design the overall composition as a 1:1 square, with the subject clear, concentrated, and eye-catching, suitable for use as a social media avatar. It's recommended that the subject be centered or slightly off-center, with a complete silhouette and a clear visual focal point. Please leave reasonable negative space, avoiding a subject that is too large or touches the edges, so that even after the avatar is cropped into a circle, the subject's key parts remain fully intact, clear, and highly recognizable. The image should still be simple, bold, and easy to recognize even at a small size. 【Background-Color Logic】Do not fix the background color to any single color, and do not default to always using blue. Prioritize extracting a "dark-tone logic" suitable for the background based on the overall color character of the input image itself, choosing a suitable background color from among the dark tendencies related to the subject. If the user explicitly specifies a background color, prioritize using the user-specified color, and on that basis maintain an overall premium, restrained, tension-filled dark-tone treatment. The choice of background color should follow these principles: - Mainly use a dark, pure, emotionally tense solid-color background - The background should effectively set off the subject's lines, forming clear contrast - Do not fix on a single hue; flexibly choose dark tones such as dark blue, dark green, dark purple, dark brown, dark gray, wine red, ink black, blue-gray, or dark olive depending on the image's character - If the image itself suits a cool-toned background, adopt a cooler dark-tone logic - If the image itself suits a warm-toned background, adopt a warmer dark-tone logic - If the user specifies a color, choose a more subdued, avatar-appropriate dark version based on that color - Avoid a fluorescent feel or a cheap, garish vividness - Avoid a background that is dull, muddy, low-contrast, or lifeless 【Subject Line-Color Logic】For the subject's main outline, it's recommended to use a thin white line, or a thin, light-colored line that contrasts clearly with the background. The line should not be too thick, nor so thin that it loses its presence — it should be light, clear, and clean. If the background is darker, prioritize white or light warm-white lines to enhance recognizability and a fresh feel. 【Accent-Element Logic】Add a small number of random, spontaneous, natural small colored accent elements around the subject, to enhance a sense of inspiration, playfulness, and lightness. Accent elements can be things like: small dots, small arcs, small stars, small smiley faces, small short brush strokes, small lightning bolts, simple geometric symbols, etc. The accent style should be rounded, playful, relaxed, and natural — like inspired decorations added on a whim, rather than deliberately arranged template elements. The accents must be kept well controlled: - Few in number, just enough to make a point - Naturally distributed, with a slight sense of randomness - Not too dense, not too rigidly symmetrical - Should not overshadow the subject - Should exist only as supporting atmosphere - Accent colors can be drawn sparingly from colors near or complementary to the background color, or a small amount of a contrasting pop color can be used, such as yellow, orange, pink, light purple, or light coral - The accents overall should harmonize with the subject and the background, and should not look like a stiff collage 【Overall Style Goal】The overall image should be minimalist, light, modern, lively, and artistic in character. It should have both the clean feel of single-line illustration and the relaxed looseness and vitality of impromptu doodling. The subject should look rounded, relaxed, and full of character, rather than stiff, rigid, or formulaic. The final result should be suitable for use as a social media avatar: eye-catching, recognizable, fun, and well-designed, while also carrying a light, cheerful, naturally lively, collectible artistic character. 【Issues to Avoid】Do not make it realistic; no shadows; no light-and-dark volume; no complex textures; no complex scenes. No mechanical outlining, no stiff rigidity, no sharp harshness, no excessive uniformity. Do not fix the background color into a single, template-like blue. Do not make the background too bright or glaring, and do not make it dull and lifeless either. Do not over-decorate, and do not let decoration steal attention from the subject. Do not lose the sense of inspiration for the sake of minimalism, and do not lose restraint for the sake of decoration. Aspect ratio 16:9