Red Velvet Mite of some variety

Thanks, valgaavmiko! Yes, the three identifying factors I can contribute are the location (already noted), the pattern of smokey-black pattern on its back, and the fact that, to my naked eye as I stared at it from a bird's-eye view and it crawled around, its back had the appearance of being flat like a piece of cardboard on top of those legs, not at all bulbous like some of its relative species'. I've also added one more picture to give a clearer view of the relative size and placement of its head.