Vucko Scroll Animation

# Scroll-Grow Showreel Video Reveal (Scrub + Mouse Parallax)
## Goal
Build a minimal editorial landing page where a **tiny video-preview thumbnail (scaled to 0.25, pulled up above its section) grows into a full-width 16:9 showreel as the intro section scrolls into view**. A GSAP ScrollTrigger scrub timeline drives nothing directly — its `onUpdate` only interpolates values into a shared state object (`translateY`, `scale`, column `gap`, and a **two-phase title font-size**), and a `requestAnimationFrame` loop applies them as a transform string, adding an **eased mouse-follow horizontal parallax** that fades out as the video reaches full scale. Scroll is smoothed with Lenis. Desktop-only effect.
## Tech
Vanilla HTML/CSS/JS with ES module imports. Use **`gsap` (npm)** with the **`ScrollTrigger`** plugin, plus **`lenis`**:
```js
import Lenis from "lenis";
import gsap from "gsap";
import { ScrollTrigger } from "gsap/ScrollTrigger";
gsap.registerPlugin(ScrollTrigger);
```
Everything runs inside a `DOMContentLoaded` listener, and the **entire script body is wrapped in `if (window.innerWidth >= 900) { ... }`** — below 900px no Lenis, no ScrollTrigger, no rAF loop at all. Wire Lenis the standard way:
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