Stack: a minimal static HTML/CSS/JavaScript site. Existing files include index.html, style.css, app.js, README.md, and the non-authoritative visual reference at docs/design-reference.png. app.js queries .headline and #interaction-status, then changes the status text to “Smoke test passed.” on headline click. The documented intent is a centered black “Tape site smoke test.” headline on a white responsive page with a system sans-serif stack, generous whitespace, semantic HTML, and an accessible interaction status. Preserve the minimal centered layout and restrained styling; do not add frameworks or unnecessary dependencies. The supplied file text does not include the contents of index.html or style.css, so the HTML-to-script wiring, semantic structure, styling, and whether the primary interaction is actually reachable cannot be verified. In particular, confirm that the expected .headline and #interaction-status elements exist, that app.js is loaded after the DOM is available or deferred, and that the headline is keyboard-accessible if it is intended to be activated. Generated code was not executed, and the project should not yet be treated as verified complete or visually matched.

## Visual handoff
VISUAL HANDOFF:
- Design reference: `docs/design-reference.png`. It is non-authoritative visual guidance; the user prompt and runnable target remain authoritative.
- Design brief: A minimal, responsive static page with a clean white background and centered black headline reading “Tape site smoke test.” Use semantic HTML, a system sans-serif font stack, generous whitespace, and restrained styling that closely matches the supplied visual reference. Keep the JavaScript entry point thin and use it only for a small smoke-test interaction, such as updating an accessible status message when the headline is activated.