:root{--bg:#f4f5f7;--card-bg:#fff;--text:#1a1d23;--text-muted:#6b7280;--border:#e5e7eb;--primary:#4338ca;--primary-hover:#3730a3;--danger-bg:#fef2f2;--danger-text:#b91c1c;--danger-border:#fecaca;--success-bg:#f0fdf4;--success-text:#15803d;--success-border:#bbf7d0;--radius:12px}@media (prefers-color-scheme:dark){:root{--bg:#14161a;--card-bg:#1e2128;--text:#f2f3f5;--text-muted:#9aa0ab;--border:#2c3038;--primary:#818cf8;--primary-hover:#a5b4fc;--danger-bg:#2a1414;--danger-text:#fca5a5;--danger-border:#5b2323;--success-bg:#10241a;--success-text:#86efac;--success-border:#1e4a33}}*{box-sizing:border-box}body{background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif}.page{justify-content:center;align-items:flex-start;min-height:100vh;padding:48px 16px;display:flex}.card{background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius);width:100%;max-width:440px;padding:32px;box-shadow:0 1px 3px #0000000f}h1{margin:0 0 8px;font-size:22px;font-weight:650}.subtitle{color:var(--text-muted);margin:0 0 24px;font-size:14px;line-height:1.5}.user-badge{color:var(--text-muted);border-bottom:1px solid var(--border);align-items:center;gap:8px;margin-bottom:20px;padding-bottom:16px;font-size:14px;display:flex}.user-badge strong{color:var(--text);font-weight:600}.btn{cursor:pointer;background:var(--primary);color:#fff;border:none;border-radius:8px;justify-content:center;align-items:center;width:100%;padding:11px 16px;font-size:14px;font-weight:600;transition:background .15s;display:inline-flex}.btn:hover{background:var(--primary-hover)}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-secondary{color:var(--text-muted);border:1px solid var(--border);background:0 0}.btn-secondary:hover{background:var(--bg);color:var(--text)}.link-row{margin-top:16px;font-size:14px}.link-row a{color:var(--primary);font-weight:500;text-decoration:none}.link-row a:hover{text-decoration:underline}.field-label{color:var(--text-muted);margin-bottom:6px;font-size:13px;font-weight:600;display:block}.select{border:1px solid var(--border);background:var(--card-bg);width:100%;color:var(--text);border-radius:8px;margin-bottom:20px;padding:9px 12px;font-size:14px}.scanner-frame{border-radius:var(--radius);border:1px solid var(--border);margin-bottom:16px;overflow:hidden}.status-line{color:var(--text-muted);align-items:center;gap:10px;padding:16px 0;font-size:14px;display:flex}.spinner{border:2px solid var(--border);border-top-color:var(--primary);border-radius:50%;flex-shrink:0;width:16px;height:16px;animation:.7s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.banner{border-radius:8px;margin-bottom:16px;padding:14px 16px;font-size:14px;line-height:1.5}.banner-error{background:var(--danger-bg);color:var(--danger-text);border:1px solid var(--danger-border)}.banner-success{background:var(--success-bg);color:var(--success-text);border:1px solid var(--success-border)}.offer-qr{border:1px solid var(--border);background:#fff;border-radius:8px;width:100%;padding:16px}