The site still needs the original large CSS/JS files.

Do not replace the css folder with only splash-upgrades.css.
Do not replace the js folder with only splash-upgrades.js.

The upgrade files are add-ons only:
- css/splash-upgrades.css loads after the original CSS.
- js/splash-upgrades.js loads after the original JS.

If subpages look unstyled, the most likely cause is that /css/style.css or /css/responsi.css is missing or not loading.

V11: CSS/JS cache-busting query strings updated to v=11.0. The Sudbury page now uses an embedded Checkfront widget, so the popup booking modal is not used for Sudbury.