Compare https://query.wikidata.org/querybuilder/?uselang=ar (slightly outdated production deployment)
with https://904524--clicky-sparqly.netlify.app/?uselang=ar (recent build from master):
The footer’s padding is wrong because it didn’t get mirrored. According to git bisect, this regressed with Update scss related dependencies (T332575) – postcss-logical and postcss-dir-pseudo-class are no longer working together the way we want them to.