"A high-end 3D app icon representing a professional screen annotation software. The icon features a sleek, vertical computer monitor with a dark matte black frame. On the screen, there are realistic digital windows and text lines being actively marked. A vibrant neon yellow highlighter stroke crosses over a paragraph, and a sharp lime green 'verified check mark' (WhatsApp style) is placed on the side. A stylized black digital pen is captured in motion, as if finishing a stroke on the glass surface. High contrast, studio lighting, vivid electric yellow and lime green accents against a deep black background. Professional UI/UX design, 8k resolution, isolated on a white background, glassmorphism effects on the screen surface."