#panel-lefthand-sidebar-stacked .lefthand-sidebar-columns {
  display: flex;
  flex-direction: row;
}

#panel-lefthand-sidebar-stacked .lefthand-sidebar-sidebar {
  flex: 0 1;
}

#panel-lefthand-sidebar-stacked .lefthand-sidebar-main-column {
  flex: 1 1;
}

#panel-lefthand-sidebar-stacked .banner img {
  width: 100%;
  height: auto;
}