Night Mode Styling
By using the Edit Card Template action, it is possible to customize how cards appear when night mode/dark mode is enabled.
If you wanted a grey background instead of black, you could use something like:
.card.nightMode {
background-color: #555;
}
If you have a 'myclass' style, the following would show the text in yellow when night mode is enabled:
.nightMode .myclass {
color: yellow;
}