iTIP formatter shows in HTML unneeded white border
I send and receive the attached email — abc.mbox. It has three MIME parts - plain text, HTML and iCalendar. It contains:
@media(prefers-color-scheme:light){body{background:Canvas;color:CanvasText}}
@media(prefers-color-scheme:dark){body{background:#ff0000;color:#0000ff}}
When Gnome is in Dark mode, it displays the email as shown below. As can be seen, there is unnecessary white border around the content.