How to get Gitit to obey Dark mode on my Mac?

[capn....@gmail.com]

What is the easiest way to get Gitit to render pages in Dark mode when I have Dark mode selected for my Mac?

I tried this, in `custom.css`:

@media (prefers-color-scheme: dark) {
    /* Your dark mode styles here */
    body{
        background-color: darkslateblue;
    }

}

And it does change the background color of the overall browser page as expected.

However, the background in the content area is still bright white. :(