I think there may have been some discussion of this before, but I can’t find it at the moment. When a popup is shown it has a border that seems to me to be unaffected by CSS. This is easy to see with light background themes:
Does anyone know if it is possible to style that border?
Popup borders
jcberquist
#1
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braver
#2
If I’m correct that’s the content margin of the popup_control in a theme and the border is actually the background color (layer0.tint) sticking out. So the theme author gets to decide if there is a border and what it looks like.
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