Viva City premium navigation and hero update

All existing HTML pages have an updated shared navigation. Only index.html hero has been replaced.
Place all files in C:\xampp-new\htdocs\check\ and open http://localhost/check/
Links use relative .html paths to work in this subfolder. Do not remove .html unless Apache rewrite is configured.
New assets: viva-nav-hero.css and viva-nav-hero.js.
Existing site and course pages retained. Back up your original site before replacing.
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