See attached gif for details.
1. With smaller widths, when you click on a card to open overview, the card for which overview is shown should be at the center of vertical scroll.
2. When you scroll down to find your card, the spacing above the overview pane is weird.
3. It seems like the width of the overview pane is constant while the width of the cards is dynamic. Both cards and overview should resize dynamically, but both should have a minimum width. If the screen size is reduced further so these minimum widths can not be accommodated, a horizontal scrollbar should be shown.