Graffiti Sketch Style Guide

The style is graffiti-like and sketch-like, presenting an overall visual effect of rapid sketching, free deformation, improvisation, and drafts. Lines are casual, exaggerated, and vary in thickness, appearing slightly chaotic yet rhythmic and expressive, emphasizing generalization, exaggeration, fun, and spontaneity rather than rigorous realism or meticulous detail. Colors are expressed in bold blocks with a distinct dry brush feel, retaining uneven application, brushstrokes, dry brush, and layering. Colors automatically adapt, but the overall expression maintains a graffiti-like, sketch-like, and generalized feel. There are no transparent watercolor washes, no delicate watercolor transitions, no paper texture, no soft misting effects, and no dreamlike quality. The background is predominantly white, maintaining a simple, relaxed, unfinished, and design-oriented feel. You can add a few auxiliary symbols, arrows, marks, circles, repeating lines, handwritten text, or other doodle elements to enhance the visual language of the sketchbook or doodle, but avoid overcrowding to prevent disrupting the main subject and the atmosphere of white space. The content of the image does not need to be pre-defined; {argument name="subject" default="theme/subject"} will automatically generate the most suitable main image, action, related elements, symbols, or simplified scene. Maintain a consistent doodle-sketch style with exaggerated and generalized expressions, avoiding complex realistic backgrounds and excessive details. A special signature, "voxcat," should be naturally included in the image, discreetly but clearly placed, such as in the lower left corner, lower right corner, or near the title. The signature style should be consistent with the overall layout, like an artist's signature or design mark; the signature font should be refined, restrained, and sophisticated, not too large, and should not disrupt the main composition or appear abrupt or cheap.