The corner-dwell auto page-turn zone is a quarter-ellipse whose radius is
a fraction (0.15) of the reading area on each axis. On wide screens such
as desktop or multi-column pages, that fraction grows the zone until it
reaches deep into the text, so selecting in a column and resting the
pointer there turns the page unexpectedly.
Cap each axis of the corner radius at 50px so the engagement zone stays a
real corner regardless of page width, while preserving the existing feel
on phones.
Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Huang Xin
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