Create a React landing page using shadcn and Tailwind CSS with a dark theme. Use a radial gradient background transitioning from #1a1a2e to #16213e. Implement a hero section with a large, bold headline, a concise subtitle, and a prominent CTA button. Add a navbar with glassmorphism effect. Include a features section with hover-animated cards. | A shadcn/ui and v0 generation - v0
