This is a card UI based donut chart created by Rafael González based on the design by Laura Ocaña. The center area displays the legends used in the chart, when you click on the donut chart it loads up the data related to that portion, in a panel on the right. You can close this data panel using the x on the top right.
If you are having trouble with the pen, try the archived copy on GitHub
See the Pen Diet Piechart by Rafael González (@rgg) on CodePen.0