body{font-family:system-ui,sans-serif;background:#111827;color:#f9fafb;margin:0;min-height:100vh;display:grid;place-items:center}main{width:min(28rem,calc(100% - 3rem));padding:2rem;background:#1f2937;border-radius:.75rem}label{display:grid;gap:.35rem;margin:1rem 0}input,button{font:inherit;padding:.7rem}button{cursor:pointer}