body{font-family:Arial;background:linear-gradient(135deg,#5d2c91,#8f5bd6);display:flex;justify-content:center;padding:40px;color:#fff}.c{background:#fff;color:#333;padding:30px;border-radius:16px;max-width:500px;width:100%}input{width:100%;padding:12px;margin:8px 0}#r{margin-top:20px;font-weight:bold}