Lumora Skyranger — Référence de design web et prompt

# Prompt: Lumora "Cadet Skyranger" interactive 3D hero

Build a single-file, one-screen **interactive character hero** for a fictional 3D studio, **Lumora**. Use plain HTML, CSS and vanilla JS, with no framework and no build step. The look is a cinematic space poster: a glossy Pixar-quality 3D cartoon boy cadet in a chunky white, orange and teal space suit rises from the bottom of the screen in front of a glowing orange planet horizon in deep navy space. A huge glowing italic headline floats above him.

The star of the page is the interaction:
- **Head follows the cursor:** his head and eyes turn to follow the mouse, left to right.
- **Helmet:** clicking the red **PUSH ME** button on his chest closes a glass bubble helmet over his head.
- **Cursor:** a ring cursor with a dot replaces the pointer.

## Media

- **Plate:** `https://d2ol7oe51mr4n9.cloudfront.net/user_38xzZboKViGWJOttwIXH07lWA1P/a194141a-44ba-44bb-8372-e6720af994ca.jpg` (1920×1080). The cadet looks straight ahead: messy auburn hair, freckles, big hazel eyes, a white suit with orange shoulders and a teal chest panel, and a collar ring around his neck. Behind him is a curved orange-gold planet horizon under deep navy space.