Usage Based Pricing

Please implement this code in the current project and add it to (Your Desired Section, e.g. homepage hero, pricing page, dashboard). Change the primary accent color to (YOUR HEX CODE COLOR, e.g. #6366F1).

Requirements:
- Use React + Tailwind CSS (match the project's existing setup)
- Install dependencies if needed: npm install react react-dom
- Keep the layout responsive on mobile and desktop
- Replace placeholder copy with content that fits the project

The UI code:

export function UsageBasedPricing() {
  return (
    <section className="mx-auto max-w-xl rounded-2xl border border-zinc-800 bg-zinc-950 p-8 text-white">
      <h2 className="text-xl font-semibold">Pay as you grow</h2>
      <p className="mt-2 text-sm text-zinc-400">$0.002 per API request · no minimum</p>
      <div className="mt-6 h-2 rounded-full bg-zinc-800">
        <div className="h-2 w-2/3 rounded-full bg-gradient-to-r from-cyan-500 to-indigo-500" />
      </div>
      <p className="mt-4 text-3xl font-bold tabular-nums">~$24<span className="text-base text-zinc-500">/mo est.</span></p>
    </section>
  );
}