If the forum doesn’t offer a light mode (I haven’t seen it), I’d say don’t bother trying to make one with CSS. They managed to add in hundreds of color variables in the CSS files, takes too much time.
You could write some css to override the hard way… browsers let you inject CSS files so you’d write one once then load it every time you visit a page.
* {
background: white !important;
color: black !important;
}
but you will run into situations with white icons on white, unreadable buttons etc. so again too much effort.
