is there a way for attr() (or similar) to access other css properties? In the example there is .child { position: absolute; left: 100px;

is there a way for attr() (or similar) to access other css properties? In the example there is .child { position: absolute; left: 100px; width: calc(90% - 100px); background-color: #ff8; text-align: center; } whould be gorgeous to write instead .child { position: absolute; left: 100px; width: calc(90% - attr(left px)); background-color: #ff8; text-align: center; } the mdn attr page[0] says it can also access properties, but I cannot find a way [0] https://developer.mozilla.org/en-US/docs/CSS/attr https://developer.mozilla.org/en-US/docs/CSS/attr