:root{--bg:#0f1420;--card:#1a2233;--line:#2a3550;--text:#e8edf7;--muted:#8494b0;--green:#3ddc84;--red:#ff5d5d;--accent:#4f8cff}*{box-sizing:border-box}body{background:var(--bg);color:var(--text);margin:0;font-family:-apple-system,Segoe UI,Roboto,sans-serif}.app{max-width:900px;margin:0 auto;padding:16px}h1{margin:8px 0 16px;font-size:20px}h1 small{color:var(--muted);font-weight:400}.err{color:var(--red);background:#2a1620;border-radius:8px;margin:8px 0;padding:12px}.grid{grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:12px;display:grid}.card{background:var(--card);border:1px solid var(--line);border-radius:12px;flex-direction:column;gap:6px;padding:14px;display:flex}.card.offline{opacity:.55}.model{font-weight:600}.serial{color:var(--muted);font-family:monospace;font-size:12px}.status{color:var(--muted);font-size:13px}.card button{background:var(--accent);color:#fff;cursor:pointer;border:0;border-radius:8px;margin-top:auto;padding:8px 0;font-weight:600}.empty{color:var(--muted);text-align:center;grid-column:1/-1;padding:24px}.panel{background:var(--card);border:1px solid var(--line);border-radius:12px;margin-top:24px;padding:16px}.panel h2{margin:0 0 12px;font-size:16px}.inv-form{flex-wrap:wrap;align-items:center;gap:8px;display:flex}.inv-form input,.inv-form select{color:var(--text);border:1px solid var(--line);background:#0f1420;border-radius:8px;padding:8px;font-size:13px}.inv-form input[type=number]{width:90px}.inv-form button{background:var(--green);color:#06281a;cursor:pointer;border:0;border-radius:8px;padding:8px 14px;font-weight:700}.check-row{width:100%;color:var(--muted);flex-wrap:wrap;gap:12px;font-size:13px;display:flex}.inv-list{flex-direction:column;gap:8px;margin-top:14px;display:flex}.inv{background:#0f1420;border-radius:8px;align-items:center;gap:10px;padding:8px 12px;font-size:13px;display:flex}.inv code{background:#1a2233;border-radius:6px;padding:2px 8px;font-family:monospace}.inv button{background:var(--red);color:#fff;cursor:pointer;border:0;border-radius:6px;margin-left:auto;padding:4px 10px}.viewer{flex-direction:column;gap:8px;display:flex}.viewer-bar{background:var(--card);border-radius:12px;align-items:center;gap:8px;padding:10px 12px;display:flex}.viewer-bar b{font-size:13px}.viewer-bar .dim{color:var(--muted);font-size:12px}.viewer-bar button{background:var(--accent);color:#fff;cursor:pointer;border:0;border-radius:6px;padding:6px 12px}.viewer canvas{border:1px solid var(--line);object-fit:contain;background:#000;border-radius:12px;max-height:70vh}