syn keyword cssFontProp contained border-top-radius border-right-radius border-bottom-radius border-left-radius border-block-start-radius border-block-end-radius border-inline-start-radius border-inline-end-radius corner corner-top-left-shape corner-top-right-shape corner-bottom-right-shape corner-bottom-left-shape corner-start-start-shape corner-start-end-shape corner-end-start-shape corner-end-end-shape corner-top-shape corner-right-shape corner-bottom-shape corner-left-shape corner-block-start-shape corner-block-end-shape corner-inline-start-shape corner-inline-end-shape corner-shape corner-top-left corner-top-right corner-bottom-left corner-bottom-right corner-start-start corner-start-end corner-end-start corner-end-end border-limit border-clip border-top-clip border-right-clip border-bottom-clip border-left-clip border-block-start-clip border-block-end-clip border-inline-start-clip border-inline-end-clip box-shadow-color box-shadow-offset box-shadow-blur box-shadow-spread box-shadow-position border-shape
syn keyword cssFontAttr contained squircle bevel scoop notch sides corners
syn region cssFunction contained matchgroup=cssFunctionName start="\<superellipse\s*(" end=")" oneline keepend