Date of birth roller has ghosting/triple rendering on digits

The BirthDatePicker roller on the profile page has a visual ghosting artifact — each digit appears rendered 2-3 times with slight offsets, creating a smeared/echoed look. The numbers are legible but look broken. Likely a CSS issue: subpixel rendering from transform: translate3d(), overlapping scroll-snap elements, or unintended text-shadow/filter. Related to OP#4909 (BirthDatePicker component).