*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:#fafafa;color:#111}.container{max-width:640px;margin:0 auto;padding:64px 24px}input[type=email],input[type=text]{border:1px solid #ccc;border-radius:8px;margin-bottom:12px}button,input[type=email],input[type=text]{width:100%;padding:12px 14px;font-size:16px}button{font-weight:600;background:#111;color:#fff;border:none;border-radius:8px;cursor:pointer}button:disabled{background:#999;cursor:not-allowed}