Bright 2D cartoon vector illustration, bold dark-brown outlines, flat fills with soft cel-shading, 16:9, frontal eye-level wide shot, symmetrical, soft even light. The cartoon detective tips his hat and holds a magnifying glass toward the viewer. On one side is a big red "SUBSCRIBE" button with a bell. On the other side a half-open case folder shows a glowing question mark and a shadowy silhouette. A red banner at the top reads "NEXT CASE SOON" in bold white and yellow lettering. A small channel watermark is in the bottom-right corner. Palette of red, yellow, navy and amber.
