*,*:before,*:after{box-sizing:border-box}:root{font-family:system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,Cantarell,Noto Sans,sans-serif;line-height:1.5;color:#0f172a;background:#e2e8f0}body{margin:0;min-height:100vh;display:flex;align-items:center;justify-content:center;padding:1.5rem}#app{width:100%;max-width:28rem}.card{background:#fff;border-radius:12px;padding:1.5rem;box-shadow:0 10px 40px #0f172a14}h1{margin:0 0 .25rem;font-size:1.25rem;font-weight:650}.sub{margin:0 0 1.25rem;font-size:.875rem;color:#64748b}label{display:block;font-size:.75rem;font-weight:600;text-transform:uppercase;letter-spacing:.04em;color:#475569;margin-bottom:.35rem}input[type=url],input[type=text]{width:100%;padding:.65rem .75rem;font-size:1rem;border:1px solid #cbd5e1;border-radius:8px;outline:none}input:focus{border-color:#3b82f6;box-shadow:0 0 0 3px #3b82f633}.error{margin-top:.5rem;font-size:.8125rem;color:#b91c1c;min-height:1.25rem}.qr-wrap{margin-top:1.25rem;display:flex;flex-direction:column;align-items:center;gap:1rem}canvas{display:block;border-radius:8px;border:1px solid #e2e8f0;background:#fff}.hint{font-size:.8125rem;color:#94a3b8;text-align:center}.actions{display:flex;gap:.5rem;flex-wrap:wrap;justify-content:center}button{font:inherit;cursor:pointer;padding:.5rem 1rem;border-radius:8px;border:1px solid #cbd5e1;background:#f8fafc;color:#0f172a}button.primary{background:#2563eb;border-color:#2563eb;color:#fff}button.primary:hover:not(:disabled){background:#1d4ed8;border-color:#1d4ed8}button:disabled{opacity:.5;cursor:not-allowed}