* {
      box-sizing: border-box;
    }
    
    body {
      font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
      margin: 0;
      padding: 16px;
      background: #ffffff;
      font-size: 13px;
      line-height: 1.4;
    }
    
    .container {
      max-width: 100%;
    }
    
    .section {
      margin-bottom: 24px;
      border: 1px solid #e6e6e6;
      border-radius: 6px;
      padding: 16px;
    }
    
    .section-title {
      font-weight: 600;
      margin-bottom: 12px;
      color: #333;
      font-size: 14px;
    }
    
    .button {
      background: #0066cc;
      color: white;
      border: none;
      padding: 8px 16px;
      border-radius: 4px;
      cursor: pointer;
      font-size: 13px;
      width: 100%;
      margin-bottom: 8px;
    }
    
    .button:hover {
      background: #0052a3;
    }
    
    .button:disabled {
      background: #cccccc;
      cursor: not-allowed;
    }
    
    .button.secondary {
      background: white;
      color: #333;
      border: 1px solid #ccc;
    }
    
    .button.secondary:hover {
      background: #f5f5f5;
    }
    
    .checkbox-group {
      margin-bottom: 12px;
    }
    
    .checkbox-item {
      display: flex;
      align-items: center;
      margin-bottom: 8px;
      padding: 4px;
    }
    
    .checkbox-item input {
      margin-right: 8px;
    }
    
    .checkbox-item label {
      flex: 1;
      cursor: pointer;
    }
    
    .collection-info {
      font-size: 11px;
      color: #666;
      margin-left: 20px;
    }
    
    .file-input {
      width: 100%;
      padding: 8px;
      border: 1px solid #ccc;
      border-radius: 4px;
      margin-bottom: 12px;
    }
    
    .status {
      padding: 8px;
      border-radius: 4px;
      margin-bottom: 12px;
      font-size: 12px;
    }
    
    .status.success {
      background: #e6f7e6;
      color: #2d7d2d;
      border: 1px solid #b3e6b3;
    }
    
    .status.error {
      background: #ffe6e6;
      color: #cc0000;
      border: 1px solid #ffb3b3;
    }
    
    .hidden {
      display: none;
    }
    
    .tabs {
      display: flex;
      margin-bottom: 16px;
      border-bottom: 1px solid #e6e6e6;
    }
    
    .tab {
      padding: 8px 16px;
      cursor: pointer;
      border-bottom: 2px solid transparent;
      font-weight: 500;
    }
    
    .tab.active {
      border-bottom-color: #0066cc;
      color: #0066cc;
    }
    
    .tab-content {
      display: none;
    }
    
    .tab-content.active {
      display: block;
    }
    
    .select-all-btn {
      font-size: 11px;
      padding: 4px 8px;
      margin-bottom: 8px;