Create a dynamic, hand-illustrated pop-art portrait avatar of a marathon runner in a mid-stride pose, conveying a sense of determined effort and exhilarating momentum. The subject, gender-neutral, should be captured from a slightly low, eye-level camera angle, utilizing a wide-angle lens to emphasize their powerful forward motion. Their expression is one of focused intensity, with slightly gritted teeth and a determined glint in their eye, sweat beading on their brow. They are wearing a brightly colored, modern running singlet and shorts, with athletic shoes showing subtle wear. The composition is a close-up portrait, with the runner's upper body and determined face filling the frame, cropped just below the waist to maintain focus on their energetic drive. Lighting should be dramatic and high-contrast, mimicking the harsh glare of a midday sun, with a strong key light from the upper-left, a subtle fill light from the right to prevent crushing shadows, and a faint rim light tracing their silhouette to separate them from the background. The color palette is vibrant and saturated, featuring bold primaries and secondary colors like electric blue, fiery orange, and sunshine yellow, reminiscent of classic comic book art. Textures should be hinted at with bold, graphic lines and flat color areas, characteristic of silkscreen printing. The background is a blurred, abstract suggestion of a racecourse – streaks of color representing cheering crowds and the urban environment, rendered with a shallow depth of field to keep the focus squarely on the runner. The overall mood is energetic, inspiring, and triumphant. The rendering style is explicitly an illustration, mimicking a hand-drawn comic book panel with thick, confident linework and a slightly textured, flat color finish, no digital smoothing.