No hard feelings if it isn't changed. Just something I did for fun. Most of the base is the current CSS with some tweaks, such as minor color differences to allow for shorthand colors (#222 instead of #1e1e1e). Making it did show me there are still colors missing from the current CSS, so I could always make that more compatible with LynxChan if you want that instead.
I've never been fond of the quick reply box, and I felt it was especially redundant with the posting form at the bottom, so I hid it. It could be made visible again by removing #quick-reply from the list of elements to not display at the bottom of the CSS.
Personal taste. It compliments the delete and report forms, so there isn't empty space on the right.
LynxChan doesn't have any selectors for the body to differentiate between the index and the catalog, like Tinyboard + vichan did, so it should work. I think the problem is the individual user changing CSS with the settings menu has no affect on the catalog page.
Thanks. I do prefer larger font sizes, but I didn't set anything concrete, such as px or pt. They're all percents, as LynxChan's default CSS does, so you could also change your browser's default font size. LynxChan's default CSS has the message, among other things, set to 80%. I changed it to 100%. Shrinking the most important text, that the user will spend the majority of his time reading, makes zero sense. And that explains why the font size was originally too small when the BO first altered the CSS to work with LynxChan. The body's 12px font size was shrunk to a measly 9.6px by the default CSS.