Offsets by axis (Floating UI's offset options): mainAxis pushes away from the anchor edge,
crossAxis slides along it, alignmentAxis slides along it for an aligned (-start / -end)
placement only, measured inward from the corner — so it survives a flip to the opposite corner.
Offsets by axis (Floating UI's
offsetoptions):mainAxispushes away from the anchor edge,crossAxisslides along it,alignmentAxisslides along it for an aligned (-start/-end) placement only, measured inward from the corner — so it survives a flip to the opposite corner.