A resolved bar style: the flat fill (scaled by opacity, 0–1) plus the
highlight colour the selected bar takes (also its outline), and the bar
geometry — gap (px between adjacent bars, the default for <BarChart gap>)
and minWidth (the px floor so a too-thin bucket stays visible) handed to
barSpanPx, with outlineWidth for the selected-bar stroke.
A resolved bar style: the flat
fill(scaled byopacity, 0–1) plus thehighlightcolour the selected bar takes (also its outline), and the bar geometry —gap(px between adjacent bars, the default for<BarChart gap>) andminWidth(the px floor so a too-thin bucket stays visible) handed tobarSpanPx, withoutlineWidthfor the selected-bar stroke.