<IfModule mod_rewrite.c>
  RewriteEngine On

  # Serve existing files/directories as-is.
  RewriteCond %{REQUEST_FILENAME} -f [OR]
  RewriteCond %{REQUEST_FILENAME} -d
  RewriteRule ^ - [L]

  # Map clean URLs to generated SSG HTML files, e.g. /floater.js -> /floater.js.html
  RewriteCond %{REQUEST_FILENAME}.html -f
  RewriteRule ^(.+?)/?$ $1.html [L]

  # SPA fallback for unknown routes.
  RewriteRule ^ index.html [L]
</IfModule>
