.flex-grid {
  
  .groups {
    position: absolute;
    top: 24px; // headers height
    
    .group {
      font-weight: normal;
      
      &:not(:first-of-type) {
        // box-shadow: 0 1px 11px 0;
        //box-shadow: -2px -6px 19px -10px;
        &.shown {
          border-top: 1px solid #ccc;
        }
      }
      
      &.collapsed {
        font-weight: normal;
        display: flex;
      }
    }
  }
}