.activity-selector {
  .popover {
    max-height: 400px;
    overflow-y: auto;
    padding: 8px;
  }
  
  .activity-group {
    margin-top: 16px;
    
    &:first-child {
      margin-top: 0;
    }
  }
  
  .activity-group__parent {
    font-weight: bold;
    padding: 8px 0;
    
    > div {
      display: flex;
      align-items: center;
      gap: 8px;
    }
    
    svg {
      width: 20px;
      height: 20px;
      color: #6b7280;
      flex-shrink: 0;
    }
  }
  
  .activity-group__parent-toggle {
    background: none;
    border: none;
    cursor: pointer;
    color: #6b7280;
    font-size: 12px;
    font-weight: normal;
    margin-left: 8px;
  }
  
  .activity-group__children {
    padding-left: 20px;
  }
  
  .activity-item {
    padding: 8px 0;
    border-bottom: 1px solid #f3f4f6;
    
    &:last-child {
      border-bottom: none;
    }
  }
  
  .activity-item--root {
    border-bottom: 1px solid #f3f4f6;
  }
}