Source CMS means header, footer, newsletter, legal and social come from site-config. Fallback is the hardcoded brand file (gateway down or empty menus). After saving in Studio, open this page with ?fresh=1 to skip the 5s cache.

Shop: masthead, then desktop mega menu from 992px. Below 992 the hamburger slides the live-style drawer down; parents slide a child panel in from the right. Footer columns are desktop-only; the mobile footer is its own flat list. Checkout: logo, 100% secure, progress steps, legal footer.