:root{font-family:Atkinson Hyperlegible,Segoe UI,sans-serif;color:#102033;background:#f4f7fb}body{margin:0}button{min-width:64px;min-height:64px;font-size:1.4rem;border-radius:16px;border:2px solid #1d4e89;background:#fff}button.primary{background:#1d4e89;color:#fff}.screen{max-width:720px;margin:0 auto;padding:24px}.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.code{font-size:4rem;letter-spacing:.2em;text-align:center}.host{min-height:100vh;background:#071426;color:#fff}