Render the Riyadh skyline as a clean outline

Create a professional image of the Riyadh skyline as a single clean contour line. Use a black 0.5 mm stroke on a plain light background, showing only the outer silhouette with no fill, no extra details, and no surrounding scene. The composition should feel precise, minimal, and poster-ready, with a coherent Najd or Riyadh context implied only through the skyline shape itself.