06262ec04c
The page is RTL, so the oversized flex track's natural (untransformed) box wasn't left-aligned with its container the way the 0%->-50% keyframe math assumed. Halfway through the loop, translateX(-50%) was scrolling past all the actual image content into empty space beyond the track, showing a fully blank marquee for part of every cycle. Force direction:ltr on .achv-marquee so the track lays out and scrolls the same predictable way regardless of page direction. Verified: track's left edge now matches the container's left edge at rest, and the duplicate set's first image lands exactly where the original one started, so the loop is seamless.
