3D logo icon for an online English tutor. Four glossy square segments arranged in a larger square layout, interlocking like stylized gear cogs to create a dynamic sense of rotation. Each segment features a minimalist embossed icon: sound waves/mouth (speaking), headphones/ear (listening), open book (reading), pen/motion (writing). Vibrant cheerful colors: electric blue, magenta purple, sunny yellow, deep violet. In the center acts a stylized silver letter 'E' as the central rotation axis with soft metallic highlights. Smooth glossy plastic material, soft studio lighting, clean solid white background, isometric projection, minimalist friendly design, modern high-tech corporate identity. Clean modern typography text below reading 'CoolEnglish'. High detail, 8K resolution, octane 3D render.
