.analytics .widget-item .content.accounts-cash-balance {
  .tall-widget();

  .data-container {
    height: ~"calc(@{impac-big-widget-size} - 20px)";
    width: 100%;
    display: flex;
  }

  .left-panel {
    flex: 0;
    min-width: 180px;
    overflow: auto;
  }

  #cash-balance-legend {

    .header {

      .group-item {
        display: flex;
        align-items: center;
        min-height: 45px;
        margin: 3px;
        font-size: 13px;
        padding: 3px;
        cursor: pointer;
        user-select: none;
        &:hover {
          background-color: @impac-widget-menus-hover-background-color;
        }
        i {
          font-size: 19px;
          padding: 4px;
          margin-top: 1px
        }
        span { color: @impac-widget-text-color; }
      }
    }
  }

  .right-panel {
    display: flex;
    flex-direction: column;
    width: 100%;
    position: relative;
    box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.26);

    .top-bar {
      flex: 0;
      min-height: 50px;
    }

    // Highchart container
    #cashBalanceChart {
      flex: 1;
    }
  }
}

.analytics .widget-item .content.accounts-cash-balance {
  .tall-widget();

  .data-container {
    height: ~"calc(@{impac-big-widget-size} - 20px)";
    width: 100%;
    display: flex;
  }

  .left-panel {
    flex: 0;
    min-width: 180px;
    overflow: auto;
  }

  #cash-balance-legend {

    .header {

      .group-item {
        display: flex;
        align-items: center;
        min-height: 45px;
        margin: 3px;
        font-size: 13px;
        padding: 3px;
        cursor: pointer;
        user-select: none;
        &:hover {
          background-color: @impac-widget-menus-hover-background-color;
        }
        i {
          font-size: 19px;
          padding: 4px;
          margin-top: 1px
        }
        span { color: @impac-widget-text-color; }
      }
    }
  }

  .right-panel {
    display: flex;
    flex-direction: column;
    width: 100%;
    position: relative;

    .top-bar {
      flex: 0;
      min-height: 50px;
    }

    // Highchart container
    #cashBalanceChart {
      flex: 1;
    }
  }
}

Remove box-shadow from cash balance chart container
Remove box-shadow from cash balance chart container
