Six website archetypes — each an invented brand in a different design language, rebuilt as a fully-fluid mobile-and-desktop page. No real trademarks, logos, or copy. No Bootstrap, no Tailwind, no CDN, no icon fonts, no JavaScript frameworks — just hand-written HTML and CSS, following the OnlyCSharp mobile-web handbook (fluid type, safe-area insets, ≥44px targets, :focus-visible, reduced-motion, semantic landmarks, dark/light). Tap any card.