Sets up Tailwind v4 via @tailwindcss/vite, adds the full brand palette
(teal, navy, ice, mint, amber, coral) as custom theme tokens, and builds
a complete homepage with hero, feature grid, code examples, verification
section, multi-model section, observability, "Why Arc", and CTAs.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
