Whenever I see a fixed navigation bar (e.g. http://fermatslibrary.com/s/a-new-proof-of-euclids-theorem http://fermatslibrary.com/s/a-new-proof-of-euclids-theore

Whenever I see a fixed navigation bar (e.g. http://fermatslibrary.com/s/a-new-proof-of-euclids-theorem http://fermatslibrary.com/s/a-new-proof-of-euclids-theorem, not like Hacker News' navigation bar), I feel like the page is constricted, and I just want it to go away. Not just visually but "physically," so it still bothers me that bars auto-hide on scroll-down and reappear on scroll-up. In fact, that feels even worse to me.