Remove transparency and fix dark mode in full screen when trying to post here

DoD

Please see the contrast of this text when trying to add post here in full screen.

Also, reduce transparency of text box when trying to add text, it it alright when I have scroll passed all messages behind the text box, but not when text is still present.

DoD

If looked at very very closely and zoomed in, you can see the title of this post in the black image here. Also, adding post as reply here has problem of transparency as well.