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How to achieve greyout on GrouFocus?

I am creating a single page site to convert to mobile app and would like a link menu like the one below:

I need the page to greyout so that the white cells show up, but only the Popup element has a greyout feature and Popup align centre (I need to align to bottom). The GroupFocus element is the best option to attach to the bottom elements but that doesn’t have greyout.

Does anyone know how I can achieve this look with Bubble?