Prepare site for Green Prophet launch

[tonic889]

Motivation

• Update the site from the older single-app content to a small studio landing page that highlights the new app, Green Prophet.
• Provide a concise support/legal surface and a placeholder CTA so the site is ready to list the app when the store URL is available.
• Refresh styling to present a modern, responsive single-page landing experience suitable for a first app launch.

Description

• Rewrote index.html into a modern landing page with a header, a Green Prophet-focused section, a Support card, and a Legal card with a link to privacy.html.
• Replaced and reformatted privacy.html content to reference Green Prophet, improve readability, and use semantic headings and lists.
• Rewrote styles.css to use CSS custom properties, responsive typography, a centered .content layout, card styles, and a styled CTA .button with an aria-disabled state.
• Kept existing assets such as images/support.png and preserved the privacy link, while adding a placeholder App Store CTA (App Store link coming soon).

Testing

• Parsed index.html and privacy.html using Python's html.parser successfully (validation succeeded).
• Attempted to fetch the remote repo README.md with curl, which failed due to network restrictions (CONNECT tunnel failed, response 403).
• Attempted a headless browser screenshot via Playwright, which failed due to a browser crash/segfault in the container runtime (artifact not produced).

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Codex Task