Helsinki — complete local specimen

Implementation: Native hds-core5.2.2 CSS; Arial fallback and original local application logic.

1. Extract this archive into its own directory.
2. Run: python3 -m http.server 8080
3. Open: http://localhost:8080/helsinki.html

The HTML includes the document root, layout/theme overrides and initialization.
Its relative vendor directory includes the actual CSS, JavaScript module chain,
fonts and other packaged assets used by this specimen. Preserve this structure;
ES modules require HTTP rather than opening a file:// URL.

Dependencies included: hds-core-5.2.2
Official reference: https://hds.hel.fi/patterns/forms/form-validation/

This is an original local demonstration, not an affiliated government service.
Actions have no external side effects. Retain supplied dependency licenses.
