:root {
      --bg: #0d1117;
      --surface: #161b22;
      --border: #30363d;
      --text: #e6edf3;
      --text-muted: #8b949e;
      --accent: #58a6ff;
      --accent-dim: #1f6feb;
      --green: #3fb950;
      --red: #f85149;
      --orange: #d29922;
      --font-mono: "SF Mono", "Fira Code", "Cascadia Code", monospace;
      --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
      --radius: 8px;
    }

    * { box-sizing: border-box; margin: 0; padding: 0; }
    body {
      font-family: var(--font-sans);
      background: var(--bg);
      color: var(--text);
      line-height: 1.6;
      padding: 0;
    }

    /* ── Layout ─── */
    .header {
      background: var(--surface);
      border-bottom: 1px solid var(--border);
      padding: 16px 24px;
      display: flex;
      align-items: center;
      gap: 12px;
      position: relative;
      z-index: 950;
    }
    .header h1 { font-size: 18px; font-weight: 600; }
    .header .badge {
      background: var(--accent-dim);
      color: #fff;
      font-size: 11px;
      padding: 2px 8px;
      border-radius: 12px;
      font-weight: 500;
    }
    .header .status-pills { margin-left: auto; display: flex; gap: 8px; }
    .pill { font-size: 12px; padding: 3px 10px; border-radius: 12px; font-weight: 500; }
    .pill.ok { background: rgba(63,185,80,.15); color: var(--green); }
    .pill.warn { background: rgba(210,153,34,.15); color: var(--orange); }
    .pill.err { background: rgba(248,81,73,.15); color: var(--red); }

    /* ── Auth gate overlay ── */
    .auth-gate {
      position: fixed;
      top: 0; left: 0; right: 0; bottom: 0;
      background: rgba(0,0,0,0.75);
      backdrop-filter: blur(6px);
      -webkit-backdrop-filter: blur(6px);
      z-index: 900;
      display: flex;
      align-items: center;
      justify-content: center;
    }
    .auth-gate.hidden { display: none; }
    .auth-gate-content {
      text-align: center;
      color: #fff;
      padding: 48px;
    }
    .auth-gate-icon { font-size: 56px; margin-bottom: 8px; }
    .auth-gate-content h2 { color: #fff; margin: 12px 0 8px; font-size: 22px; }
    .auth-gate-content p { color: rgba(255,255,255,0.7); font-size: 14px; margin: 0; }

    .container { max-width: 1400px; margin: 0 auto; padding: 24px; }

    /* ── Step bar (collapsed data sources) ─── */
    .step-bar {
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 10px 16px;
      margin-bottom: 16px;
      display: flex;
      align-items: center;
      gap: 12px;
      cursor: pointer;
      transition: border-color .15s;
    }
    .step-bar:hover { border-color: var(--text-muted); }
    .step-bar .step-label {
      font-size: 11px;
      font-weight: 600;
      color: var(--text-muted);
      text-transform: uppercase;
      letter-spacing: .05em;
      flex-shrink: 0;
    }
    .step-bar .step-chips {
      display: flex;
      gap: 6px;
      flex-wrap: wrap;
      flex: 1;
      min-width: 0;
    }
    .step-bar .step-chip {
      font-size: 11px;
      padding: 2px 10px;
      border-radius: 10px;
      white-space: nowrap;
      font-weight: 500;
      max-width: 220px;
      overflow: hidden;
      text-overflow: ellipsis;
    }
    .step-bar .step-field-count {
      font-size: 11px;
      color: var(--text-muted);
      flex-shrink: 0;
    }
    .step-bar .step-edit-btn {
      font-size: 11px;
      padding: 3px 10px;
      border-radius: 4px;
      border: 1px solid var(--border);
      background: transparent;
      color: var(--text-muted);
      cursor: pointer;
      flex-shrink: 0;
    }
    .step-bar .step-edit-btn:hover { border-color: var(--accent); color: var(--accent); }

    /* ── Workspace (split pane) ─── */
    .workspace {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
      min-height: calc(100vh - 160px);
    }
    @media (max-width: 1100px) { .workspace { grid-template-columns: 1fr; } }
    .workspace-pane {
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      display: flex;
      flex-direction: column;
      overflow: hidden;
    }
    .pane-header {
      padding: 12px 16px;
      border-bottom: 1px solid var(--border);
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-shrink: 0;
    }
    .pane-header h2 {
      font-size: 13px;
      font-weight: 600;
      color: var(--text-muted);
      text-transform: uppercase;
      letter-spacing: .05em;
      margin: 0;
    }
    .pane-body {
      flex: 1;
      overflow-y: auto;
      padding: 16px;
    }
    .pane-footer {
      padding: 0;
      border-top: 1px solid var(--border);
      flex-shrink: 0;
    }

    /* ── Model summary bar (collapsible) ─── */
    .model-summary-bar {
      display: flex;
      align-items: center;
      gap: 8px;
      padding: 8px 16px;
      cursor: pointer;
      user-select: none;
      font-size: 12px;
      color: var(--text-muted);
      transition: background .15s;
    }
    .model-summary-bar:hover { background: rgba(255,255,255,.03); }
    .model-summary-icon {
      font-size: 11px;
      opacity: .6;
    }
    .model-summary-chips {
      display: flex;
      gap: 6px;
      flex-wrap: wrap;
      flex: 1;
    }
    .model-chip {
      background: var(--bg);
      border: 1px solid var(--border);
      border-radius: 10px;
      padding: 1px 8px;
      font-size: 11px;
      color: var(--text-muted);
      white-space: nowrap;
    }
    .model-chip.provider { color: var(--accent); border-color: rgba(88,166,255,.25); }
    .model-summary-toggle {
      font-size: 10px;
      color: var(--text-muted);
      transition: transform .15s;
    }
    .model-summary-toggle.open { transform: rotate(90deg); }
    .model-config-panel {
      display: none;
      padding: 0 16px 12px;
      border-bottom: 1px solid var(--border);
    }

    /* ── Action bar (sticky footer) ─── */
    .action-bar {
      display: flex;
      align-items: center;
      gap: 8px;
      padding: 10px 16px;
    }
    .run-btn-primary {
      background: var(--green, #2ea043) !important;
      color: #fff !important;
      font-size: 14px !important;
      font-weight: 600;
      padding: 8px 24px;
      border-radius: 6px;
      border: none;
      display: inline-flex;
      align-items: center;
      gap: 6px;
      letter-spacing: .02em;
    }
    .run-btn-primary:hover { background: #3fb950 !important; }
    .run-btn-primary:disabled { opacity: .4; cursor: not-allowed; }
    .action-bar-sep {
      width: 1px;
      height: 20px;
      background: var(--border);
      margin: 0 4px;
    }
    .action-bar-secondary {
      display: flex;
      gap: 6px;
      margin-left: auto;
    }

    /* ── Field view modal ─── */
    .field-view-modal {
      width: 700px;
      max-height: 85vh;
      display: flex;
      flex-direction: column;
    }
    .field-view-header {
      display: flex;
      align-items: center;
      gap: 10px;
      margin-bottom: 12px;
    }
    .field-view-header h3 { margin: 0; font-size: 14px; }
    .field-view-meta {
      font-size: 12px;
      color: var(--text-muted);
      display: flex;
      gap: 12px;
      margin-bottom: 10px;
    }
    .field-view-content {
      flex: 1;
      overflow-y: auto;
      background: var(--bg);
      border: 1px solid var(--border);
      border-radius: 6px;
      padding: 12px;
      font-family: var(--font-mono);
      font-size: 12px;
      white-space: pre-wrap;
      word-break: break-word;
      max-height: 60vh;
      line-height: 1.5;
    }
    .field-expand-btn {
      background: none;
      border: none;
      padding: 2px 4px;
      font-size: 12px;
      color: var(--text-muted);
      cursor: pointer;
      opacity: .6;
      flex-shrink: 0;
    }
    .field-expand-btn:hover { opacity: 1; color: var(--accent); background: none; }

    /* ── Results pane ─── */
    .results-grid {
      display: flex;
      flex-direction: column;
      gap: 20px;
      padding-bottom: 24px;
    }
    .results-empty {
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      padding: 60px 20px;
      color: var(--text-muted);
      text-align: center;
    }
    .results-empty .empty-icon { font-size: 36px; margin-bottom: 12px; opacity: .4; }
    .results-empty .empty-text { font-size: 14px; }
    .results-empty .empty-hint { font-size: 12px; margin-top: 4px; }

    /* ── Fields toggle (inline in editor pane) ─── */
    .fields-toggle-bar {
      display: flex;
      align-items: center;
      gap: 8px;
      padding: 8px 0;
      cursor: pointer;
      user-select: none;
    }
    .fields-toggle-bar:hover { color: var(--text); }
    .fields-toggle-bar .toggle-arrow {
      font-size: 10px;
      transition: transform .15s;
      color: var(--text-muted);
    }
    .fields-toggle-bar .toggle-arrow.open { transform: rotate(90deg); }
    .fields-toggle-bar .toggle-label {
      font-size: 12px;
      font-weight: 600;
      color: var(--text-muted);
    }
    .fields-toggle-bar .toggle-count {
      font-size: 11px;
      color: var(--accent);
    }

    /* ── Cards ─── */
    .card {
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 20px;
      margin-bottom: 20px;
    }
    .card h2 {
      font-size: 14px;
      font-weight: 600;
      color: var(--text-muted);
      text-transform: uppercase;
      letter-spacing: 0.05em;
      margin-bottom: 16px;
    }

    /* ── Forms ─── */
    .input-row { display: flex; gap: 12px; align-items: flex-end; }
    .input-group { flex: 1; }
    .input-group label {
      display: block;
      font-size: 12px;
      color: var(--text-muted);
      margin-bottom: 4px;
    }
    input, select, textarea {
      width: 100%;
      background: var(--bg);
      border: 1px solid var(--border);
      border-radius: 6px;
      color: var(--text);
      padding: 8px 12px;
      font-size: 14px;
      font-family: var(--font-sans);
    }
    input:focus, select:focus, textarea:focus {
      outline: none;
      border-color: var(--accent);
    }
    textarea {
      font-family: var(--font-mono);
      font-size: 12px;
      resize: vertical;
      min-height: 80px;
    }

    button {
      background: var(--accent-dim);
      color: #fff;
      border: none;
      border-radius: 6px;
      padding: 8px 20px;
      font-size: 14px;
      font-weight: 500;
      cursor: pointer;
      white-space: nowrap;
    }
    button:hover { background: var(--accent); }
    button:disabled { opacity: 0.4; cursor: not-allowed; }
    button.secondary {
      background: transparent;
      border: 1px solid var(--border);
      color: var(--text-muted);
    }
    button.secondary:hover { border-color: var(--text-muted); color: var(--text); }
    button.danger {
      background: transparent;
      border: 1px solid rgba(248,81,73,.4);
      color: var(--red);
    }
    button.danger:hover { background: rgba(248,81,73,.1); }
    button.small { padding: 4px 12px; font-size: 12px; }

    /* ── URL Input ─── */
    .url-input-wrapper { display: flex; gap: 12px; }
    .url-input-wrapper input { flex: 1; font-family: var(--font-mono); }

    /* ── Source list ─── */
    .source-item {
      display: flex;
      align-items: center;
      gap: 10px;
      padding: 8px 12px;
      background: var(--bg);
      border: 1px solid var(--border);
      border-radius: 6px;
      font-size: 13px;
      margin-bottom: 6px;
    }
    .source-tag {
      font-size: 11px;
      font-weight: 600;
      padding: 2px 8px;
      border-radius: 10px;
      white-space: nowrap;
    }
    .source-group-header {
      font-size: 12px;
      font-weight: 600;
      color: var(--text-muted);
      padding: 12px 0 4px;
      display: flex;
      align-items: center;
      gap: 8px;
      grid-column: 1 / -1;
      border-bottom: 1px solid var(--border);
      margin-bottom: 4px;
    }

    /* ── Dataset info ─── */
    .dataset-info { display: flex; gap: 16px; flex-wrap: wrap; font-size: 13px; }
    .dataset-info .tag {
      background: var(--bg);
      border: 1px solid var(--border);
      border-radius: 6px;
      padding: 4px 12px;
    }
    .dataset-info .tag span { color: var(--text-muted); }

    /* ── Data fields ─── */
    .fields-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
      gap: 12px;
      margin-top: 12px;
    }
    .field-card {
      background: var(--bg);
      border: 1px solid var(--border);
      border-radius: 6px;
      padding: 12px;
      cursor: pointer;
      transition: border-color 0.15s;
    }
    .field-card:hover { border-color: var(--text-muted); }
    .field-card.selected { border-color: var(--accent); background: rgba(31,111,235,.08); }
    .field-card .field-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 6px;
    }
    .field-card .field-name { font-weight: 600; font-size: 13px; }
    .field-card .field-meta { font-size: 11px; color: var(--text-muted); }
    .field-card .field-check {
      width: 18px; height: 18px;
      border: 2px solid var(--border);
      border-radius: 4px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 12px;
      flex-shrink: 0;
    }
    .field-card.selected .field-check {
      background: var(--accent-dim);
      border-color: var(--accent);
      color: #fff;
    }
    .field-preview {
      font-size: 11px;
      color: var(--text-muted);
      font-family: var(--font-mono);
      max-height: 60px;
      overflow: hidden;
      margin-top: 6px;
      word-break: break-all;
    }

    /* ── Config grid ─── */
    .config-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px;
    }
    @media (max-width: 900px) { .config-grid { grid-template-columns: 1fr; } }

    /* ── Tabs ─── */
    .tab-bar {
      display: flex;
      gap: 0;
      border-bottom: 1px solid var(--border);
      margin-bottom: 16px;
    }
    .tab-btn {
      background: none;
      border: none;
      border-bottom: 2px solid transparent;
      color: var(--text-muted);
      padding: 8px 16px;
      font-size: 13px;
      font-weight: 500;
      cursor: pointer;
      transition: color .15s, border-color .15s;
    }
    .tab-btn:hover { color: var(--text); background: none; }
    .tab-btn.active {
      color: var(--accent);
      border-bottom-color: var(--accent);
      background: none;
    }
    .tab-panel { display: none; }
    .tab-panel.active { display: block; }

    /* ── Field insertion chips ─── */
    .field-chips {
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
      margin-top: 6px;
    }
    .field-chips:empty { display: none; }
    .field-chip-insert {
      display: inline-flex;
      align-items: center;
      gap: 3px;
      padding: 2px 8px;
      border-radius: 4px;
      border: 1px solid var(--border);
      background: var(--surface);
      color: var(--text-muted);
      font-size: 11px;
      font-family: monospace;
      cursor: pointer;
      transition: border-color .15s, color .15s, background .15s;
    }
    .field-chip-insert:hover {
      border-color: var(--accent);
      color: var(--accent);
      background: rgba(99,102,241,.08);
    }
    .field-chip-insert.already-used {
      border-color: rgba(34,197,94,.3);
      color: rgba(34,197,94,.8);
    }
    .field-chips-label {
      font-size: 11px;
      color: var(--text-muted);
      margin-right: 2px;
      user-select: none;
    }

    /* ── User Message compact view ─── */
    /* (Prompt Template section) */
    .user-msg-section {
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 12px;
      background: var(--surface);
    }
    .user-msg-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 8px;
    }
    .user-msg-header label {
      font-size: 12px;
      font-weight: 600;
      color: var(--text-muted);
      margin: 0;
    }
    .user-msg-toggle-edit {
      font-size: 11px;
      color: var(--accent);
      cursor: pointer;
      background: none;
      border: none;
      padding: 2px 6px;
      border-radius: 4px;
      transition: background .15s;
    }
    .user-msg-toggle-edit:hover {
      background: rgba(99,102,241,.1);
    }
    .user-msg-fields {
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
      margin-bottom: 0;
    }
    .user-msg-fields:empty::after {
      content: 'No data fields loaded yet';
      font-size: 11px;
      color: var(--text-muted);
      font-style: italic;
    }
    .user-msg-field-toggle {
      display: inline-flex;
      align-items: center;
      gap: 4px;
      padding: 4px 10px;
      border-radius: 4px;
      border: 1px solid var(--border);
      background: var(--surface);
      color: var(--text-muted);
      font-size: 11px;
      font-family: var(--font-mono);
      cursor: pointer;
      transition: all .15s;
      user-select: none;
    }
    .user-msg-field-toggle:hover {
      border-color: var(--accent);
    }
    .user-msg-field-toggle.active {
      border-color: rgba(34,197,94,.5);
      background: rgba(34,197,94,.08);
      color: rgba(34,197,94,.9);
    }
    .user-msg-field-toggle .toggle-dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      border: 1.5px solid var(--border);
      transition: all .15s;
      flex-shrink: 0;
    }
    .user-msg-field-toggle.active .toggle-dot {
      background: rgba(34,197,94,.8);
      border-color: rgba(34,197,94,.5);
    }
    .user-msg-field-toggle.disabled {
      opacity: .35;
      pointer-events: none;
      border-style: dashed;
    }
    .user-msg-advanced {
      margin-top: 10px;
      border-top: 1px solid var(--border);
      padding-top: 10px;
    }
    .user-msg-advanced textarea {
      min-height: 100px;
      font-family: var(--font-mono);
      font-size: 12px;
    }
    .user-msg-hint {
      font-size: 11px;
      color: var(--text-muted);
      margin-top: 4px;
    }

    /* ── Prompt editor ─── */
    .prompt-editor {
      margin-top: 16px;
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 16px;
      background: var(--bg);
    }
    .prompt-editor h3 {
      font-size: 13px;
      font-weight: 600;
      color: var(--text-muted);
      margin-bottom: 12px;
    }
    .prompt-actions {
      display: flex;
      gap: 8px;
      margin-top: 12px;
      flex-wrap: wrap;
    }
    .prompt-actions-inline {
      display: flex;
      gap: 6px;
      margin-top: 10px;
      flex-wrap: wrap;
    }

    /* ── Results (in column layout) ─── */
    @media (max-width: 900px) { .results-grid { flex-direction: column; } }
    .result-card {
      background: var(--bg);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      overflow: hidden;
      position: relative;
    }
    .result-card.truncated {
      border-color: #d4a017;
      box-shadow: 0 0 0 1px rgba(212,160,23,.25), 0 0 12px rgba(212,160,23,.08);
    }
    .truncated-badge {
      position: absolute;
      top: 0;
      right: 16px;
      background: #d4a017;
      color: #1a1a1a;
      font-size: 11px;
      font-weight: 600;
      padding: 3px 10px 4px;
      border-radius: 0 0 6px 6px;
      display: flex;
      align-items: center;
      gap: 4px;
      z-index: 1;
      box-shadow: 0 2px 6px rgba(212,160,23,.25);
    }
    .truncated-badge svg {
      width: 13px;
      height: 13px;
      flex-shrink: 0;
    }
    .result-card .result-header {
      padding: 12px 16px;
      background: var(--surface);
      border-bottom: 1px solid var(--border);
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 13px;
    }
    .result-card .result-header .model-tag {
      color: var(--accent);
      font-family: var(--font-mono);
      font-size: 12px;
    }
    .result-body { padding: 16px; }
    .result-body .short-summary {
      font-size: 15px;
      font-weight: 500;
      margin-bottom: 16px;
      padding-bottom: 12px;
      border-bottom: 1px solid var(--border);
    }
    .result-body .long-summary { font-size: 14px; line-height: 1.7; }
    .result-body .long-summary ul { padding-left: 20px; margin: 8px 0; }
    .result-body .long-summary li { margin-bottom: 6px; }
    .result-body .long-summary strong { color: var(--accent); }

    /* ── Rendered markdown ─── */
    .md-rendered {
      font-size: 14px;
      line-height: 1.7;
      color: var(--text);
    }
    .md-rendered h1, .md-rendered h2, .md-rendered h3, .md-rendered h4 {
      color: var(--text);
      margin: 16px 0 8px;
      font-weight: 600;
    }
    .md-rendered h1 { font-size: 18px; }
    .md-rendered h2 { font-size: 16px; border-bottom: 1px solid var(--border); padding-bottom: 6px; }
    .md-rendered h3 { font-size: 14px; }
    .md-rendered p { margin: 8px 0; }
    .md-rendered ul, .md-rendered ol { padding-left: 20px; margin: 8px 0; }
    .md-rendered li { margin-bottom: 4px; }
    .md-rendered strong { color: var(--accent); }
    .md-rendered em { color: var(--text-muted); }
    .md-rendered blockquote {
      border-left: 3px solid var(--accent);
      padding: 4px 12px;
      margin: 8px 0;
      background: rgba(99,102,241,.05);
      color: var(--text-muted);
    }
    .md-rendered code {
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: 4px;
      padding: 1px 5px;
      font-family: var(--font-mono);
      font-size: 12px;
    }
    .md-rendered pre {
      background: var(--bg);
      border: 1px solid var(--border);
      border-radius: 6px;
      padding: 12px;
      overflow-x: auto;
      margin: 8px 0;
    }
    .md-rendered pre code {
      background: none;
      border: none;
      padding: 0;
      font-size: 12px;
      color: var(--text);
    }
    .md-rendered table {
      width: 100%;
      border-collapse: collapse;
      margin: 8px 0;
      font-size: 13px;
    }
    .md-rendered th, .md-rendered td {
      border: 1px solid var(--border);
      padding: 6px 10px;
      text-align: left;
    }
    .md-rendered th { background: var(--surface); font-weight: 600; }
    .md-rendered hr { border: none; border-top: 1px solid var(--border); margin: 12px 0; }
    .format-badge {
      display: inline-block;
      font-size: 10px;
      padding: 1px 6px;
      border-radius: 3px;
      background: var(--surface);
      border: 1px solid var(--border);
      color: var(--text-muted);
      margin-bottom: 8px;
    }
    .format-badge.truncated-json-badge {
      background: rgba(212,160,23,.12);
      border-color: #d4a017;
      color: #d4a017;
      font-weight: 600;
    }
    .truncated-json-block {
      border-color: rgba(212,160,23,.3) !important;
    }
    .truncated-json-ellipsis {
      color: #d4a017;
      font-style: italic;
      font-size: 12px;
    }
    .result-meta {
      padding: 12px 16px;
      background: var(--surface);
      border-top: 1px solid var(--border);
      font-size: 12px;
      color: var(--text-muted);
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }

    .raw-json {
      background: var(--bg);
      border: 1px solid var(--border);
      border-radius: 6px;
      padding: 12px;
      font-family: var(--font-mono);
      font-size: 12px;
      white-space: pre-wrap;
      word-break: break-all;
      max-height: 400px;
      overflow-y: auto;
      margin-top: 8px;
      position: relative;
    }

    /* ── Results action bar (sticky in results pane) ─── */
    .results-action-bar {
      display: flex;
      align-items: center;
      gap: 8px;
      padding: 10px 16px;
      border-bottom: 1px solid var(--border);
      background: var(--surface);
      flex-shrink: 0;
      position: sticky;
      top: 0;
      z-index: 5;
    }

    /* ── Result detail button ─── */
    .result-detail-btn {
      padding: 2px 8px !important;
      font-size: 14px !important;
      font-weight: 700;
      line-height: 1;
      letter-spacing: 1px;
    }

    /* ── HTML sandbox ─── */
    .html-sandbox-wrap {
      margin-top: 8px;
    }
    .html-sandbox-frame {
      display: block;
    }
    .format-badge.html-badge {
      background: rgba(88,166,255,.12);
      border-color: var(--accent);
      color: var(--accent);
      font-weight: 600;
    }

    /* ── Result Detail Modal ─── */
    .result-detail-modal {
      width: 820px;
      max-height: 88vh;
      overflow-y: auto;
      padding: 0 !important;
    }
    .rd-tabs {
      display: flex;
      align-items: center;
      gap: 0;
      border-bottom: 1px solid var(--border);
      padding: 8px 16px 0;
      background: var(--surface);
      position: sticky;
      top: 0;
      z-index: 2;
    }
    .rd-tab {
      background: none;
      border: none;
      color: var(--text-muted);
      font-size: 13px;
      font-weight: 500;
      padding: 8px 16px;
      cursor: pointer;
      border-bottom: 2px solid transparent;
      transition: color .15s, border-color .15s;
    }
    .rd-tab:hover { color: var(--text); }
    .rd-tab.active {
      color: var(--accent);
      border-bottom-color: var(--accent);
    }
    .rd-panel {
      padding: 16px 20px;
    }
    .rd-section {
      margin-bottom: 16px;
    }
    .rd-label {
      font-size: 11px;
      color: var(--text-muted);
      text-transform: uppercase;
      letter-spacing: .04em;
      display: block;
      margin-bottom: 4px;
    }
    .rd-stats {
      display: flex;
      gap: 14px;
      flex-wrap: wrap;
      font-size: 12px;
      color: var(--text-muted);
      padding: 8px 12px;
      background: var(--bg);
      border: 1px solid var(--border);
      border-radius: 6px;
    }
    .json-block {
      position: relative;
      margin-top: 12px;
    }
    .json-block .copy-btn {
      position: absolute;
      top: 8px;
      right: 8px;
      z-index: 2;
      padding: 3px 10px;
      font-size: 11px;
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: 4px;
      color: var(--text-muted);
      cursor: pointer;
      transition: color .15s, border-color .15s;
      user-select: none;
      -webkit-user-select: none;
    }
    .json-block .copy-btn:hover {
      color: var(--accent);
      border-color: var(--accent);
    }
    /* JSON syntax highlighting */
    .json-key { color: #58a6ff; }
    .json-string { color: #a5d6ff; }
    .json-number { color: #79c0ff; }
    .json-bool { color: #ff7b72; }
    .json-null { color: var(--text-muted); }

    .spinner {
      display: inline-block;
      width: 16px; height: 16px;
      border: 2px solid var(--border);
      border-top-color: var(--accent);
      border-radius: 50%;
      animation: spin .6s linear infinite;
      margin-right: 8px;
      vertical-align: middle;
    }
    @keyframes spin { to { transform: rotate(360deg); } }

    /* ── Running card ─── */
    .running-card {
      background: var(--bg);
      border: 1px solid var(--accent);
      border-radius: var(--radius);
      overflow: hidden;
      margin-bottom: 20px;
      animation: pulse-border 2s ease-in-out infinite;
    }
    .running-card .running-header {
      padding: 12px 16px;
      background: var(--surface);
      border-bottom: 1px solid rgba(99,102,241,.25);
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 13px;
    }
    .running-card .running-body {
      padding: 24px 16px;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 12px;
      color: var(--text-muted);
    }
    .running-card .running-body .running-timer {
      font-family: var(--font-mono);
      font-size: 28px;
      font-weight: 600;
      color: var(--accent);
      letter-spacing: 1px;
    }
    .running-card .running-body .running-label {
      font-size: 12px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    @keyframes pulse-border {
      0%, 100% { border-color: var(--accent); box-shadow: 0 0 0 0 rgba(99,102,241,0); }
      50% { border-color: rgba(99,102,241,.5); box-shadow: 0 0 12px rgba(99,102,241,.15); }
    }

    /* ── Multi-model modal ─── */
    .mm-modal {
      width: 560px;
      max-height: 80vh;
      display: flex;
      flex-direction: column;
    }
    .mm-provider-group {
      margin-bottom: 14px;
    }
    .mm-provider-header {
      display: flex;
      align-items: center;
      gap: 8px;
      padding: 6px 0;
      font-size: 12px;
      font-weight: 600;
      color: var(--text-muted);
      border-bottom: 1px solid var(--border);
      margin-bottom: 6px;
      cursor: pointer;
      user-select: none;
    }
    .mm-provider-header:hover { color: var(--text); }
    .mm-provider-header .mm-prov-check {
      width: 14px; height: 14px;
      border: 2px solid var(--border);
      border-radius: 3px;
      display: flex; align-items: center; justify-content: center;
      font-size: 10px; flex-shrink: 0;
    }
    .mm-provider-header .mm-prov-check.checked {
      background: var(--accent-dim); border-color: var(--accent); color: #fff;
    }
    .mm-model-list {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 4px;
      padding-left: 4px;
    }
    .mm-model-item {
      display: flex;
      align-items: center;
      gap: 6px;
      padding: 5px 8px;
      border-radius: 5px;
      cursor: pointer;
      font-size: 12px;
      color: var(--text-muted);
      transition: background .1s;
    }
    .mm-model-item:hover { background: rgba(255,255,255,.04); }
    .mm-model-item.selected { color: var(--text); }
    .mm-model-item .mm-check {
      width: 14px; height: 14px;
      border: 2px solid var(--border);
      border-radius: 3px;
      display: flex; align-items: center; justify-content: center;
      font-size: 10px; flex-shrink: 0;
    }
    .mm-model-item.selected .mm-check {
      background: var(--accent-dim); border-color: var(--accent); color: #fff;
    }
    .mm-model-name { flex: 1; }
    .mm-model-meta {
      font-size: 10px;
      color: var(--text-muted);
      opacity: .7;
    }
    .mm-footer {
      display: flex;
      align-items: center;
      gap: 10px;
      margin-top: 14px;
      padding-top: 12px;
      border-top: 1px solid var(--border);
    }
    .mm-count {
      font-size: 12px;
      color: var(--text-muted);
      flex: 1;
    }
    /* ── Multi running cards grid ─── */
    .multi-running-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 10px;
      margin-bottom: 16px;
    }
    @media (max-width: 900px) { .multi-running-grid { grid-template-columns: 1fr; } }
    .running-card-mini {
      background: var(--bg);
      border: 1px solid var(--accent);
      border-radius: var(--radius);
      overflow: hidden;
      animation: pulse-border 2.5s ease-in-out infinite;
    }
    .running-card-mini.done {
      border-color: var(--green);
      animation: none;
    }
    .running-card-mini.errored {
      border-color: var(--red);
      animation: none;
    }
    .running-card-mini .rc-header {
      padding: 8px 10px;
      background: var(--surface);
      border-bottom: 1px solid rgba(99,102,241,.15);
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 11px;
      font-weight: 600;
    }
    .running-card-mini .rc-body {
      padding: 14px 10px;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 6px;
    }
    .running-card-mini .rc-timer {
      font-family: var(--font-mono);
      font-size: 20px;
      font-weight: 600;
      color: var(--accent);
    }
    .running-card-mini.done .rc-timer { color: var(--green); }
    .running-card-mini.errored .rc-timer { color: var(--red); }
    .running-card-mini .rc-status {
      font-size: 11px;
      color: var(--text-muted);
      display: flex;
      align-items: center;
      gap: 4px;
    }

    .error-msg {
      background: rgba(248,81,73,.1);
      border: 1px solid rgba(248,81,73,.3);
      border-radius: 6px;
      padding: 12px;
      color: var(--red);
      font-size: 13px;
      margin-top: 12px;
    }

    .hidden { display: none !important; }

    .toggle-link {
      font-size: 13px;
      color: var(--accent);
      cursor: pointer;
      user-select: none;
      display: inline-block;
    }
    .toggle-link:hover { text-decoration: underline; }

    .data-preview {
      max-height: 300px;
      overflow-y: auto;
      font-size: 13px;
      font-family: var(--font-mono);
      white-space: pre-wrap;
      line-height: 1.5;
      color: var(--text-muted);
      background: var(--bg);
      border: 1px solid var(--border);
      border-radius: 6px;
      padding: 12px;
      margin-top: 8px;
    }

    /* ── AI Assist button ─── */
    .ai-assist-btn {
      display: inline-flex;
      align-items: center;
      gap: 4px;
      padding: 3px 10px;
      border-radius: 6px;
      border: 1px solid rgba(210,153,34,.3);
      background: rgba(210,153,34,.08);
      color: var(--orange);
      font-size: 11px;
      font-weight: 500;
      cursor: pointer;
      transition: all .2s;
      white-space: nowrap;
      vertical-align: middle;
    }
    .ai-assist-btn:hover {
      background: rgba(210,153,34,.18);
      border-color: var(--orange);
      box-shadow: 0 0 8px rgba(210,153,34,.15);
    }
    .ai-assist-btn:disabled {
      opacity: .4;
      cursor: not-allowed;
      box-shadow: none;
    }
    .ai-assist-btn svg {
      width: 14px;
      height: 14px;
      flex-shrink: 0;
    }
    .ai-assist-btn.loading {
      animation: ai-pulse 1.5s ease-in-out infinite;
    }
    @keyframes ai-pulse {
      0%, 100% { box-shadow: 0 0 0 0 rgba(210,153,34,0); }
      50% { box-shadow: 0 0 12px rgba(210,153,34,.25); }
    }

    /* ── AI Assist modal ─── */
    .ai-modal {
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 24px;
      width: 640px;
      max-width: 95vw;
      max-height: 85vh;
      overflow-y: auto;
    }
    .ai-modal h3 {
      font-size: 16px;
      margin-bottom: 4px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .ai-modal h3 svg { width: 20px; height: 20px; color: var(--orange); }
    .ai-modal .ai-subtitle {
      font-size: 12px;
      color: var(--text-muted);
      margin-bottom: 16px;
    }
    .ai-dataset-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 6px;
      margin-top: 8px;
      max-height: 180px;
      overflow-y: auto;
    }
    .ai-dataset-item {
      display: flex;
      align-items: center;
      gap: 8px;
      padding: 6px 10px;
      background: var(--bg);
      border: 1px solid var(--border);
      border-radius: 6px;
      font-size: 12px;
      color: var(--text);
      cursor: pointer;
      transition: border-color .15s;
    }
    .ai-dataset-item:hover { border-color: var(--text-muted); }
    .ai-dataset-item.checked { border-color: var(--orange); background: rgba(210,153,34,.06); }
    .ai-dataset-item input[type="checkbox"] {
      accent-color: var(--orange);
      cursor: pointer;
      width: 16px;
      min-width: 16px;
      height: 16px;
      flex-shrink: 0;
    }
    .ai-dataset-item .ds-name {
      font-weight: 500;
      color: var(--text);
      flex: 1;
      overflow: hidden;
      text-overflow: ellipsis;
      white-space: nowrap;
    }
    .ai-dataset-item .ds-size {
      font-size: 10px;
      color: var(--text-muted);
      flex-shrink: 0;
    }
    /* ── Format preset buttons ─── */
    .format-presets-grid {
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
    }
    .format-preset-btn {
      display: inline-flex;
      align-items: center;
      gap: 5px;
      padding: 6px 12px;
      border-radius: 6px;
      border: 1px solid var(--border);
      background: var(--bg);
      color: var(--text);
      font-size: 12px;
      font-weight: 500;
      cursor: pointer;
      transition: all .15s;
      white-space: nowrap;
    }
    .format-preset-btn:hover {
      border-color: var(--orange);
      background: rgba(210,153,34,.08);
      color: var(--orange);
    }
    .format-preset-btn.active {
      border-color: var(--orange);
      background: rgba(210,153,34,.12);
      color: var(--orange);
      box-shadow: 0 0 6px rgba(210,153,34,.1);
    }
    .format-preset-btn .fp-icon {
      font-size: 14px;
      line-height: 1;
    }

    .ai-result-preview {
      background: var(--bg);
      border: 1px solid var(--border);
      border-radius: 6px;
      padding: 12px;
      font-family: var(--font-mono);
      font-size: 12px;
      white-space: pre-wrap;
      max-height: 300px;
      overflow-y: auto;
      margin-top: 12px;
      color: var(--text);
      line-height: 1.5;
    }
    .ai-result-meta {
      display: flex;
      gap: 12px;
      margin-top: 8px;
      font-size: 11px;
      color: var(--text-muted);
    }

    /* Save dialog */
    .modal-overlay {
      position: fixed;
      top: 0; left: 0; right: 0; bottom: 0;
      background: rgba(0,0,0,.6);
      display: flex;
      align-items: center;
      justify-content: center;
      z-index: 1000;
    }
    .modal {
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 24px;
      width: 480px;
      max-width: 90vw;
    }
    .modal.wide { width: 800px; }
    .modal h3 { font-size: 16px; margin-bottom: 16px; }
    .modal .input-group { margin-bottom: 12px; }

    /* Prompt manager */
    .prompt-list { display: flex; flex-direction: column; gap: 8px; margin-bottom: 12px; }
    .prompt-item {
      display: flex;
      align-items: center;
      gap: 10px;
      padding: 10px 14px;
      background: var(--bg);
      border: 1px solid var(--border);
      border-radius: 6px;
      cursor: pointer;
      transition: border-color .15s;
    }
    .prompt-item:hover { border-color: var(--text-muted); }
    .prompt-item.active { border-color: var(--accent); background: rgba(31,111,235,.08); }
    .prompt-item .pi-info { flex: 1; min-width: 0; }
    .prompt-item .pi-name { font-weight: 600; font-size: 13px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
    .prompt-item .pi-desc { font-size: 11px; color: var(--text-muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
    .prompt-item .pi-fields {
      display: inline-flex;
      gap: 4px;
      margin-left: 6px;
      flex-shrink: 0;
    }
    .field-chip {
      display: inline-block;
      font-size: 10px;
      padding: 1px 7px;
      border-radius: 10px;
      white-space: nowrap;
      font-weight: 500;
      line-height: 1.5;
    }
    .prompt-item .pi-badge {
      font-size: 10px; padding: 2px 6px; border-radius: 4px;
      background: rgba(88,166,255,.12); color: var(--accent); white-space: nowrap;
    }
    .prompt-item .pi-actions { display: flex; gap: 4px; flex-shrink: 0; }
    .prompt-item .pi-actions button { padding: 3px 8px; font-size: 11px; }
    .prompt-item .pi-run-btn {
      background: rgba(63,185,80,.15); color: #3fb950; border: 1px solid rgba(63,185,80,.3);
      font-size: 10px; padding: 3px 7px; border-radius: 4px; cursor: pointer;
      transition: background .15s, color .15s;
    }
    .prompt-item .pi-run-btn:hover { background: #3fb950; color: #0d1117; }

    /* Login / Auth */
    .auth-bar {
      display: flex;
      align-items: center;
      gap: 10px;
      margin-left: auto;
      padding-left: 16px;
      border-left: 1px solid var(--border);
    }
    .auth-bar .user-info {
      font-size: 12px;
      color: var(--text-muted);
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .auth-bar .user-info .email { color: var(--text); font-weight: 500; }
    .auth-bar .user-info .expiry { font-size: 11px; }
    .login-form {
      display: flex;
      gap: 8px;
      align-items: center;
    }
    .login-form input {
      width: 180px;
      padding: 5px 10px;
      font-size: 12px;
    }
    .login-form input[type="password"] { width: 140px; }
    .login-form button { padding: 5px 14px; font-size: 12px; }
    .login-error {
      font-size: 11px;
      color: var(--red);
      max-width: 300px;
      overflow: hidden;
      text-overflow: ellipsis;
      white-space: nowrap;
    }
    .refresh-form {
      display: flex;
      gap: 8px;
      align-items: center;
    }
    .refresh-form .refresh-email {
      font-size: 12px;
      color: var(--text);
      font-weight: 500;
      white-space: nowrap;
    }
    .refresh-form input[type="password"] {
      width: 160px;
      padding: 5px 10px;
      font-size: 12px;
      background: var(--bg);
      border: 1px solid var(--border);
      border-radius: 6px;
      color: var(--text);
    }
    .refresh-form input[type="password"]:focus {
      outline: none;
      border-color: var(--accent);
      box-shadow: 0 0 0 2px rgba(88, 166, 255, .2);
    }
    .refresh-form .refresh-error {
      font-size: 11px;
      color: var(--red);
      max-width: 220px;
      overflow: hidden;
      text-overflow: ellipsis;
      white-space: nowrap;
    }

    /* ═══════════════════════════════════════════
       RESPONSIVE — Tablet (≤ 1100px)
       ═══════════════════════════════════════════ */
    @media (max-width: 1100px) {
      .container { padding: 16px; }
      .header { padding: 12px 16px; gap: 8px; }
      .header h1 { font-size: 16px; }
      /* auth bar wraps */
      .auth-bar { margin-left: auto; padding-left: 10px; }
      .login-form input { width: 140px; }
      .login-form input[type="password"] { width: 110px; }
      /* workspace already goes 1fr via existing query */
      .workspace { min-height: auto; }
      /* modals fit tablets */
      .modal { width: 90vw; }
      .modal.wide { width: 95vw; }
      .ai-modal { width: 90vw; }
      .mm-modal { width: 90vw; }
      .field-view-modal { width: 90vw; }
      /* preview modal */
      #previewModal .modal { width: 95vw; }
    }

    /* ═══════════════════════════════════════════
       RESPONSIVE — Mobile (≤ 640px)
       ═══════════════════════════════════════════ */
    @media (max-width: 640px) {
      .container { padding: 10px; }

      /* ── Header ── */
      .header {
        padding: 10px 12px;
        flex-wrap: wrap;
        gap: 6px;
      }
      .header h1 { font-size: 15px; }
      .header .badge { font-size: 10px; padding: 1px 6px; }
      .auth-bar {
        width: 100%;
        margin-left: 0;
        padding-left: 0;
        border-left: none;
        padding-top: 8px;
        border-top: 1px solid var(--border);
        overflow-x: auto;
      }
      .login-form { flex-wrap: wrap; gap: 6px; }
      .login-form input { width: 100%; min-width: 0; }
      .login-form input[type="password"] { width: 100%; }
      .login-form button { width: 100%; }
      .refresh-form { flex-wrap: wrap; gap: 6px; }
      .refresh-form input[type="password"] { width: 100%; }
      .auth-bar .user-info { flex-wrap: wrap; font-size: 11px; }

      /* ── Step 1: Data Sources ── */
      .card { padding: 14px; margin-bottom: 14px; }
      .url-input-wrapper {
        flex-direction: column;
        gap: 8px;
      }
      .url-input-wrapper input { font-size: 13px; }
      .step-bar { padding: 8px 12px; gap: 8px; flex-wrap: wrap; }
      .step-bar .step-chips { gap: 4px; }
      .step-bar .step-chip { font-size: 10px; padding: 2px 7px; max-width: 150px; }

      /* ── Workspace pane ── */
      .workspace { gap: 12px; }
      .pane-header { padding: 10px 12px; }
      .pane-header h2 { font-size: 12px; }
      .pane-body { padding: 12px; }

      /* ── Data fields grid ── */
      .fields-grid {
        grid-template-columns: 1fr;
        gap: 8px;
      }
      .field-card { padding: 10px; }
      .field-card .field-name { font-size: 12px; }
      .field-preview { max-height: 40px; font-size: 10px; }

      /* ── Tabs ── */
      .tab-bar { margin-bottom: 12px; }
      .tab-btn { padding: 6px 12px; font-size: 12px; }

      /* ── User msg (Prompt Template) ── */
      .user-msg-section { padding: 10px; }
      .user-msg-field-toggle { font-size: 10px; padding: 3px 7px; }
      .user-msg-header label { font-size: 11px; }

      /* ── Prompt editor (Library) ── */
      .prompt-editor { padding: 12px; }
      .editor-meta-grid {
        grid-template-columns: 1fr !important;
      }

      /* ── Model footer ── */
      .model-summary-bar { padding: 6px 12px; gap: 6px; }
      .model-summary-chips { gap: 4px; }
      .model-chip { font-size: 10px; padding: 1px 6px; }
      .model-config-panel { padding: 0 12px 10px; }
      .config-grid { grid-template-columns: 1fr !important; gap: 10px; }

      /* ── Action bar ── */
      .action-bar, .results-action-bar {
        padding: 8px 12px;
        flex-wrap: wrap;
        gap: 6px;
      }
      .run-btn-primary {
        font-size: 13px !important;
        padding: 7px 16px;
        flex: 1;
        justify-content: center;
      }
      #btnRunAll { flex: 1; text-align: center; justify-content: center; }
      .action-bar-sep { display: none; }
      .action-bar-secondary {
        width: 100%;
        margin-left: 0;
        justify-content: stretch;
      }
      .action-bar-secondary button { flex: 1; text-align: center; font-size: 11px; }

      /* ── Result detail modal ── */
      .result-detail-modal { width: 100%; max-width: 100%; }
      .rd-tabs { padding: 6px 12px 0; }
      .rd-tab { font-size: 12px; padding: 6px 10px; }
      .rd-panel { padding: 12px; }

      /* ── Results ── */
      .result-card .result-header { padding: 10px 12px; font-size: 12px; flex-wrap: wrap; gap: 6px; }
      .result-body { padding: 12px; }
      .result-meta { padding: 10px 12px; font-size: 11px; gap: 10px; }
      .truncated-badge { font-size: 10px; padding: 2px 8px; }
      .raw-json { font-size: 11px; padding: 10px; max-height: 300px; }

      /* ── Running cards ── */
      .running-card .running-body .running-timer { font-size: 22px; }
      .multi-running-grid { grid-template-columns: 1fr; gap: 8px; }
      .running-card-mini .rc-timer { font-size: 16px; }

      /* ── Modals ── */
      .modal-overlay { padding: 10px; align-items: flex-start; padding-top: 40px; }
      .modal { width: 100%; max-width: 100%; padding: 16px; }
      .modal.wide { width: 100%; }
      .modal h3 { font-size: 14px; }
      .ai-modal { width: 100%; max-width: 100%; padding: 16px; max-height: 90vh; }
      .ai-dataset-grid { grid-template-columns: 1fr; }
      .mm-modal { width: 100%; max-width: 100%; }
      .mm-model-list { grid-template-columns: 1fr; }
      .field-view-modal { width: 100%; max-width: 100%; }
      .field-view-content { max-height: 50vh; font-size: 11px; }

      /* ── Preview modal ── */
      #previewModal .modal { width: 100%; max-width: 100%; padding: 14px; }
      .data-preview { font-size: 11px; padding: 10px; max-height: 200px; }

      /* ── Prompt list ── */
      .prompt-item { padding: 8px 10px; gap: 8px; }
      .prompt-item .pi-name { font-size: 12px; }
      .prompt-item .pi-actions { flex-wrap: wrap; gap: 3px; }
      .prompt-item .pi-actions button { font-size: 10px; padding: 2px 6px; }
      .prompt-item .pi-fields { display: none; }
      .prompt-item .pi-badge { font-size: 9px; }

      /* ── Misc ── */
      .format-presets-grid { gap: 4px; }
      .format-preset-btn { padding: 5px 8px; font-size: 11px; }
      textarea { font-size: 12px; min-height: 70px; }
      .ai-result-preview { font-size: 11px; max-height: 200px; }
      .md-rendered { font-size: 13px; }
      .md-rendered h1 { font-size: 16px; }
      .md-rendered h2 { font-size: 14px; }
      .md-rendered pre { padding: 10px; font-size: 11px; }

      /* ── Source items ── */
      .source-item { padding: 6px 10px; font-size: 12px; flex-wrap: wrap; }
      .dataset-info { gap: 8px; font-size: 12px; }

      /* ── Heavy warning ── */
      #fieldsHeavyWarning { font-size: 11px; padding: 6px 10px; }
    }

    /* ═══════════════════════════════════════════
       RESPONSIVE — Small phone (≤ 400px)
       ═══════════════════════════════════════════ */
    @media (max-width: 400px) {
      .container { padding: 6px; }
      .header { padding: 8px 10px; }
      .header h1 { font-size: 13px; }
      .card { padding: 10px; }
      .pane-body { padding: 10px; }
      .tab-btn { padding: 5px 8px; font-size: 11px; }
      .run-btn-primary { padding: 6px 12px; font-size: 12px !important; }
      .model-chip { font-size: 9px; }
      .user-msg-field-toggle { font-size: 9px; padding: 2px 6px; }
      .field-card .field-name { font-size: 11px; }
      .prompt-item .pi-desc { display: none; }
    }

    /* ═══════════════════════════════════════════
       Usage Panel
       ═══════════════════════════════════════════ */
    .usage-btn {
      margin-right: 6px;
    }
    .usage-panel {
      position: fixed;
      top: 52px;
      right: 12px;
      width: 420px;
      max-height: calc(100vh - 70px);
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      box-shadow: 0 8px 32px rgba(0,0,0,.45);
      z-index: 1000;
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }
    .usage-panel-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 10px 14px;
      border-bottom: 1px solid var(--border);
      font-size: 13px;
    }
    .usage-panel-body {
      overflow-y: auto;
      padding: 14px;
      flex: 1;
    }
    .usage-daily-limit {
      background: var(--bg);
      border: 1px solid var(--border);
      border-radius: 6px;
      padding: 10px 12px;
      margin-bottom: 14px;
    }
    .usage-daily-header {
      display: flex;
      justify-content: space-between;
      font-size: 11px;
      color: var(--text-muted);
      margin-bottom: 6px;
    }
    .usage-daily-header span:last-child {
      font-family: var(--font-mono);
      color: var(--text);
    }
    .usage-daily-bar-bg {
      width: 100%;
      height: 6px;
      background: var(--border);
      border-radius: 3px;
      overflow: hidden;
    }
    .usage-daily-bar-fill {
      height: 100%;
      border-radius: 3px;
      transition: width .3s ease;
    }
    .usage-daily-remaining {
      font-size: 10px;
      color: var(--text-muted);
      text-align: right;
      margin-top: 4px;
    }
    .usage-summary {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 10px;
      margin-bottom: 16px;
    }
    .usage-stat {
      background: var(--bg);
      border: 1px solid var(--border);
      border-radius: 6px;
      padding: 10px;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 2px;
    }
    .usage-stat-val {
      font-size: 16px;
      font-weight: 600;
      color: var(--accent);
      font-family: var(--font-mono);
    }
    .usage-stat-label {
      font-size: 10px;
      color: var(--text-muted);
      text-transform: uppercase;
      letter-spacing: .5px;
    }
    .usage-section-title {
      font-size: 11px;
      font-weight: 600;
      color: var(--text-muted);
      text-transform: uppercase;
      letter-spacing: .5px;
      margin-bottom: 8px;
      margin-top: 4px;
    }
    .usage-table {
      width: 100%;
      border-collapse: collapse;
      font-size: 11px;
      margin-bottom: 16px;
    }
    .usage-table th {
      text-align: left;
      color: var(--text-muted);
      font-weight: 500;
      padding: 4px 6px;
      border-bottom: 1px solid var(--border);
      font-size: 10px;
      text-transform: uppercase;
    }
    .usage-table td {
      padding: 5px 6px;
      border-bottom: 1px solid rgba(48,54,61,.4);
      font-family: var(--font-mono);
      font-size: 11px;
    }
    .usage-model-name {
      font-family: var(--font-sans) !important;
      max-width: 140px;
      overflow: hidden;
      text-overflow: ellipsis;
      white-space: nowrap;
    }
    .usage-recent {
      display: flex;
      flex-direction: column;
      gap: 4px;
      margin-bottom: 14px;
      max-height: 240px;
      overflow-y: auto;
    }
    .usage-run-row {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 11px;
      padding: 4px 6px;
      background: var(--bg);
      border-radius: 4px;
    }
    .usage-run-time {
      color: var(--text-muted);
      min-width: 90px;
      font-size: 10px;
    }
    .usage-run-model {
      flex: 1;
      overflow: hidden;
      text-overflow: ellipsis;
      white-space: nowrap;
    }
    .usage-run-cost {
      font-family: var(--font-mono);
      color: var(--accent);
      font-size: 11px;
    }
    .usage-run-tokens {
      font-family: var(--font-mono);
      color: var(--text-muted);
      font-size: 10px;
      min-width: 70px;
      text-align: right;
    }
    .usage-footer {
      text-align: center;
      font-size: 10px;
      color: var(--text-muted);
      padding-top: 10px;
      border-top: 1px solid var(--border);
    }
    @media (max-width: 480px) {
      .usage-panel {
        width: calc(100vw - 16px);
        right: 8px;
        left: 8px;
      }
    }