:root{color-scheme:light;--ink:#112b3a;--muted:#536570;--line:#d4e0e5;--blue:#006b8b;--paper:#f4f7f8}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.6 system-ui,-apple-system,"Segoe UI",sans-serif}header{max-width:1040px;margin:auto;padding:26px 28px;display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line)}a{color:var(--blue);text-underline-offset:4px}.brand{font-size:25px;font-weight:850;letter-spacing:-1px;color:var(--ink);text-decoration:none}.brand span{color:var(--blue)}nav{display:flex;gap:18px;font-size:14px}main{max-width:680px;margin:48px auto 60px;padding:0 24px}.eyebrow{font-size:11px;font-weight:800;letter-spacing:2px;color:var(--blue)}h1{font-size:36px;line-height:1.2;letter-spacing:-1.1px;margin:12px 0 18px}.intro{font-size:17px;color:var(--muted);margin-bottom:26px}.notice{border-left:3px solid #bf8a2c;background:#fff6e6;padding:14px 18px;font-size:14px;margin-bottom:22px}form,.result{background:#fff;border:1px solid var(--line);border-radius:16px;padding:30px;box-shadow:0 6px 24px #112b3a06}.step{display:flex;align-items:center;gap:12px;margin-bottom:24px}.step h2{font-size:20px;margin:0}.number{background:#e2f1f5;color:var(--blue);width:30px;height:30px;border-radius:50%;display:grid;place-items:center;font-size:14px;font-weight:750}.second{margin-top:32px;padding-top:26px;border-top:1px solid var(--line)}label{display:block;font-size:14px;font-weight:650;margin:18px 0 7px}input,select,textarea{width:100%;padding:12px 13px;min-height:48px;border:1px solid #a5b8c2;border-radius:7px;font:inherit;background:#fff;color:var(--ink)}input:focus,select:focus,textarea:focus{outline:3px solid #008aad33;border-color:var(--blue)}input#purchase-code,input#machine-code,textarea{font-family:ui-monospace,Consolas,monospace;font-size:15px}.help{font-size:13px;color:var(--muted);margin:8px 0 0}.help:empty{display:none}button{width:100%;border:0;border-radius:7px;padding:15px 20px;background:var(--blue);color:white;font:650 16px/1.3 system-ui;cursor:pointer;margin-top:26px}button:hover{background:#00526b}button:focus-visible{outline:3px solid #d29b36;outline-offset:4px}button:disabled{opacity:.65;cursor:wait}.fine{font-size:12px;color:var(--muted);margin:14px 0 0}.result{margin-top:24px;border-color:#419174;background:#f0faf5}.result h2{font-size:22px;margin:0}.result button{margin-top:12px}#status{font-size:14px;color:#9b2727}footer{margin-top:30px;color:var(--muted);font-size:13px;text-align:center;line-height:2.1}[hidden]{display:none!important}@media(max-width:480px){header{padding:20px}main{margin-top:30px;padding:0 16px}h1{font-size:29px}form,.result{padding:22px 18px}nav{gap:12px}}