low text contrast

[Rudxain]

Not sure if this is Firefox-specific, but:

• The "Search Wiki" placeholder dissapears in color-scheme: light. I guess it's identical to the BG color
• On the API Reference index, the selected "view" button is the only one that's readable. That is, the text "Tree view" cannot be seen because the entire button is white/light-gray, same thing happens to "Alphabet View" button when switching to tree