:root{font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;color:#1f2937;background:#f9fafb}body{margin:0}.setup{max-width:40rem;margin:3rem auto;padding:0 1rem;line-height:1.5}.setup h1{font-size:1.75rem;margin-bottom:.5rem}.setup h2{font-size:1.1rem;margin-top:2rem}.setup .lead{color:#4b5563}