Minimalist Black Marker Doodle

Draw in a {argument name="medium" default="simple hand-drawn doodled style cartoon"}, as if sketched by a person with a {argument name="pen type" default="black felt-tip pen"}. Use natural marker lines, slightly wobbly contours, subtle hand-drawn imperfections, slightly open edges, and a warm editorial doodle feeling. Avoid polished vector-clean results, avoid overly crisp digital perfection, and keep the image simple, airy, flat, and understated. Use {argument name="accent color" default="sky blue"} only as the accent color.