Redesign the frontend: real type, hero landing, depth

Lifts the UI from wireframe to a finished heritage look: Fraunces (display serif) + Inter (sans) via next/font; a proper hero landing with a feature triad and the Origin mark; a warm bronze-tinted background gradient for depth; a sticky branded header and refined footer. Polished button (sizes + bronze focus ring + shadow), card (rounded-xl, soft layered shadow), and input (bronze focus) primitives that carry across every page.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Signed-off-by: Justin Paul <justin@jpaul.me>

frontend/components/ui/card.tsx

@@ -6,7 +6,7 @@ export function Card({ className, ...props }: React.HTMLAttributes<HTMLDivElemen
   return (
     <div
       className={cn(
-        "rounded-lg border border-[var(--border)] bg-[var(--surface)] shadow-sm",
+        "rounded-xl border border-[var(--border)] bg-[var(--surface)] shadow-[0_1px_2px_rgba(26,26,23,0.04),0_8px_24px_-12px_rgba(26,26,23,0.10)]",
         className,
       )}
       {...props}