Build a modern, mobile-responsive fintech web application called "Oldgold" (an AI agent that autonomously hunts down forgotten 401(k) retirement accounts).

The app should be a single-page React application using Tailwind CSS for styling, Lucide React for icons, and Framer Motion for smooth animations.

Design System & Vibe

• Vibe: Trustworthy, premium, modern, and slightly magical (AI-driven).
• Colors: Use zinc (50 to 900) for the primary monochrome UI, amber-500 to orange-600 for primary accents and gradients, and soft blue and green for trust/success indicators.
• Typography: Clean sans-serif (Inter). Use tight tracking on large headings.
• Layout: Centered, card-based layouts for the app flow, with a clean top navigation bar.

Application Flow & State

The app should have a main state that toggles between the LandingPage and the AppFlow. The AppFlow should be a multi-step wizard with the following steps: connect -> scanning -> results -> consolidate -> success. Use Framer Motion's AnimatePresence to fade and slightly scale between these steps.

Screen 1: Landing Page

• Header: Logo (Coins icon + "Oldgold") on the left, "Sign In" text button on the right.
• Hero Section:
  • A small pill badge at the top: "$1.65 Trillion in forgotten 401(k)s" with a pulsing amber dot.
  • Massive, bold headline: "Find your forgotten retirement money." Make "retirement money" a text-transparent gradient from amber-500 to orange-600.
  • Subtitle explaining the AI agent scans W-2s and contacts HR departments.
  • A large, dark (zinc-900) CTA button: "Find My 401(k)s" with an ArrowRight icon.
• Features Grid: 3 columns below the hero.
  1. "Autonomous Hunting" (Search icon)
  2. "One-Click Consolidation" (Zap icon)
  3. "Ongoing Monitoring" (ShieldCheck icon)

Screen 2: App Flow - Connect IRS

• A clean, centered card.
• Icon: Landmark (bank) icon in a blue tinted circle.
• Title: "Connect IRS Account"
• Description: "We need to pull your W-2 history to identify every employer you've ever had a retirement plan with."
• UI Element: A "Read-only access" trust badge with a shield icon.
• Button: "Connect via ID.me" (zinc-900). Clicking this advances to the next step.