/* Thumbnail grid */
    .page-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
      gap: 16px;
      margin-top: 16px;
    }
    .page-thumb {
      position: relative;
      border: 2px solid var(--color-border-light);
      border-radius: var(--radius-sm);
      overflow: hidden;
      cursor: pointer;
      transition: all var(--transition-fast);
      background: var(--color-surface);
    }
    .page-thumb:hover {
      border-color: var(--color-primary-subtle);
      box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    }
    .page-thumb.selected {
      border-color: #ef4444;
      box-shadow: 0 0 0 2px rgba(239,68,68,0.25);
    }
    .page-thumb canvas {
      display: block;
      width: 100%;
      height: auto;
    }
    .page-thumb .page-number {
      text-align: center;
      padding: 6px 0;
      font-size: 0.78rem;
      font-weight: 600;
      color: var(--color-text-secondary);
      background: var(--color-bg);
      border-top: 1px solid var(--color-border-light);
    }
    .page-thumb.selected .page-number {
      background: #fef2f2;
      color: #ef4444;
      text-decoration: line-through;
    }
    .page-thumb .remove-overlay {
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      bottom: 32px;
      background: rgba(239, 68, 68, 0.18);
      display: none;
      align-items: center;
      justify-content: center;
      pointer-events: none;
    }
    .page-thumb.selected .remove-overlay {
      display: flex;
    }
    .page-thumb .remove-overlay svg {
      width: 40px;
      height: 40px;
      color: #dc2626;
      opacity: 0.7;
    }

    /* Selection controls */
    .selection-bar {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 10px;
      margin-top: 16px;
      padding: 12px 16px;
      background: var(--color-bg);
      border: 1px solid var(--color-border-light);
      border-radius: var(--radius-sm);
    }
    .selection-bar .sel-count {
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--color-text);
      margin-right: auto;
    }
    .selection-bar .sel-count .sel-num {
      color: #ef4444;
    }
    .sel-btn {
      padding: 6px 14px;
      background: var(--color-surface);
      border: 1px solid var(--color-border);
      border-radius: var(--radius-sm);
      font-family: var(--font-body);
      font-size: 0.78rem;
      font-weight: 600;
      color: var(--color-text-secondary);
      cursor: pointer;
      transition: all var(--transition-fast);
      white-space: nowrap;
    }
    .sel-btn:hover {
      border-color: var(--color-primary-subtle);
      background: var(--color-primary-light);
      color: var(--color-primary);
    }

    /* Page range input */
    .range-input-group {
      display: flex;
      align-items: center;
      gap: 8px;
      margin-top: 12px;
    }
    .range-input-group input[type="text"] {
      flex: 1;
      max-width: 300px;
      padding: 8px 14px;
      border: 1px solid var(--color-border);
      border-radius: var(--radius-sm);
      font-family: var(--font-mono);
      font-size: 0.82rem;
      color: var(--color-text);
      background: var(--color-surface);
      transition: border-color var(--transition-fast);
    }
    .range-input-group input[type="text"]:focus {
      outline: none;
      border-color: var(--color-primary);
      box-shadow: 0 0 0 3px rgba(59,130,246,0.1);
    }
    .range-input-group input[type="text"]::placeholder {
      color: var(--color-text-muted);
    }
    .range-apply-btn {
      padding: 8px 16px;
      background: var(--color-surface);
      border: 1px solid var(--color-border);
      border-radius: var(--radius-sm);
      font-family: var(--font-body);
      font-size: 0.82rem;
      font-weight: 600;
      color: var(--color-text-secondary);
      cursor: pointer;
      transition: all var(--transition-fast);
    }
    .range-apply-btn:hover {
      border-color: var(--color-primary-subtle);
      background: var(--color-primary-light);
      color: var(--color-primary);
    }

    /* File info badge */
    .file-info-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 6px 14px;
      background: var(--color-primary-light);
      color: var(--color-primary);
      border-radius: 100px;
      font-size: 0.8rem;
      font-weight: 600;
      margin-bottom: 12px;
    }

    /* Progress indicator */
    .progress-bar-wrap {
      width: 100%;
      height: 6px;
      background: var(--color-border);
      border-radius: 3px;
      margin-top: 16px;
      overflow: hidden;
      display: none;
    }
    .progress-bar-wrap.visible {
      display: block;
    }
    .progress-bar-fill {
      height: 100%;
      background: var(--color-primary);
      border-radius: 3px;
      transition: width 0.3s ease;
      width: 0%;
    }

    /* Status message */
    .status-msg {
      margin-top: 12px;
      padding: 10px 16px;
      border-radius: var(--radius-sm);
      font-size: 0.85rem;
      font-weight: 500;
      display: none;
    }
    .status-msg.visible {
      display: block;
    }
    .status-msg.error {
      background: var(--color-error-bg, #fef2f2);
      color: var(--color-error, #dc2626);
      border: 1px solid rgba(239,68,68,0.2);
    }
    .status-msg.success {
      background: #f0fdf4;
      color: #16a34a;
      border: 1px solid rgba(22,163,74,0.2);
    }

    /* Loading spinner for thumbnails */
    .loading-wrap {
      text-align: center;
      padding: 48px 24px;
    }
    .loading-wrap .spinner {
      width: 36px;
      height: 36px;
      border: 3px solid var(--color-border);
      border-top-color: var(--color-primary);
      border-radius: 50%;
      animation: spin 0.8s linear infinite;
      margin: 0 auto 16px;
    }
    @keyframes spin {
      to { transform: rotate(360deg); }
    }
    .loading-wrap p {
      font-size: 0.9rem;
      color: var(--color-text-muted);
    }

    @media (max-width: 768px) {
      .page-grid {
        grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
        gap: 10px;
      }
      .selection-bar {
        flex-direction: column;
        align-items: stretch;
      }
      .selection-bar .sel-count {
        margin-right: 0;
        text-align: center;
      }
      .sel-buttons-wrap {
        display: flex;
        flex-wrap: wrap;
        gap: 6px;
        justify-content: center;
      }
      .range-input-group {
        flex-direction: column;
      }
      .range-input-group input[type="text"] {
        max-width: 100%;
      }
    }