*{margin:0;padding:0;box-sizing:border-box}body{font-family:system-ui,-apple-system,sans-serif;background:#f8fafc;min-height:100vh;padding:20px}.container{max-width:800px;margin:0 auto;background:#fff;border-radius:16px;box-shadow:0 10px 40px rgba(0,0,0,.1);overflow:hidden}header{background:#1e40af;color:#fff;padding:40px 20px;text-align:center}h1{font-size:2.8rem;margin-bottom:8px}.form{padding:40px}label{display:block;margin:18px 0 8px;font-weight:600;color:#374151}input,select{width:100%;padding:14px;border:2px solid #e5e7eb;border-radius:8px;font-size:16px}button{margin-top:30px;width:100%;padding:18px;background:#2563eb;color:#fff;font-size:18px;font-weight:700;border:none;border-radius:10px;cursor:pointer}button:disabled{background:#93c5fd;cursor:not-allowed}.result{padding:30px;background:#f8fafc;margin:20px;border-radius:12px;white-space:pre-wrap;line-height:1.6}