Motion — premium landing page for a SaaS product

Motion - interactive SaaS landing page with animations and code-diff demo

The main focus is on interactivity. Scroll-reveal animations, fade-in effects, and code-diff block are implemented in pure JavaScript.

What has been implemented:
- Static HTML/CSS/JS structure without frameworks
- Local fonts, images, CSS, audio, and media
- Rebranding of the interface under Motion
- Header/footer edits: logo, typography, links
- Scroll-reveal and fade-in animations
- Interactive code-diff block
- Editable right code pane
- Green inserted-text highlighting
- Synchronization of left and right diff parts
- Preservation of syntax highlighting during editing
- Responsive layout
- Clean production/deploy folder
- Checking asset dependencies and absence of 404

Technical details:
- HTML5, CSS3, vanilla JavaScript
- No React, Next.js, Vue
- No Webpack/Vite/esbuild
- Fully static site
- 100% local runtime assets
- IntersectionObserver for reveal animations
- Vanilla JS module for code-diff interaction

Challenges and resolved issues:
- Reproducing complex UI without original React/Next runtime
- Transferring interactive logic to vanilla JS
- Preserving syntax highlighting during live editing
- Synchronizing diff panels
- Correct operation of opacity/transform in reveal animations
- Localizing assets without CDN
- Preparing a clean deploy package

Result:
A ready standalone static landing page under the Motion brand, which retains the visual complexity of the reference, works without a build process, and is deployed as a regular HTML/CSS/JS site.

Stack:
HTML5 · CSS3 · Vanilla JavaScript · IntersectionObserver · GitHub · Vercel