What part of +/- buttons exactly?
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This is the whole chunk, similar to what Tom posted here:
.do-quantity-buttons form .quantity:not(.buttons-added):not(.hidden)::after,
.do-quantity-buttons form .quantity:not(.buttons-added):not(.hidden)::before,
.woocommerce form .quantity.buttons-added .minus,
.woocommerce form .quantity.buttons-added .plus,
.woocommerce form .quantity.buttons-added .qty
Minus, plus and qty are doing their thing fine, it’s the first two selectors that I’ve no clue what they’re applied to.