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/button.tsx

@@ -4,19 +4,19 @@ import { cva, type VariantProps } from "class-variance-authority";
 import { cn } from "@/lib/utils";
 
 const buttonVariants = cva(
-  "inline-flex items-center justify-center rounded-md text-sm font-medium transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-bronze focus-visible:ring-offset-1 disabled:pointer-events-none disabled:opacity-50",
+  "inline-flex items-center justify-center gap-2 rounded-lg font-medium transition-all focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-bronze focus-visible:ring-offset-2 focus-visible:ring-offset-[var(--background)] disabled:pointer-events-none disabled:opacity-50",
   {
     variants: {
       variant: {
-        // Bronze is the brand accent; paper reads cleanly on it.
-        default: "bg-bronze text-paper hover:bg-bronze-deep",
+        default: "bg-bronze text-paper shadow-sm hover:bg-bronze-deep hover:shadow",
         outline:
-          "border border-bronze text-bronze bg-transparent hover:bg-bronze hover:text-paper",
+          "border border-[var(--border)] bg-[var(--surface)] hover:border-bronze hover:text-bronze",
         ghost: "text-[var(--foreground)] hover:bg-bronze/10",
       },
       size: {
-        default: "h-10 px-4 py-2",
-        sm: "h-9 px-3",
+        default: "h-10 px-4 text-sm",
+        sm: "h-9 px-3 text-sm",
+        lg: "h-12 px-6 text-base",
       },
     },
     defaultVariants: { variant: "default", size: "default" },