One of the advantages of doing so is that the crop value will be automatically updated if you decide to change the value of your CSS variables (with no need to modify the mixin call) or if the line-height variable is modified at different media queries (with no need to re-use the mixin). The mixin explainedWhen using the lhCrop mixin, a ::before pseudo-element is created with a negative margin whi
![Line-height Crop — a simple CSS formula to remove top space from your text](https://cdn-ak-scissors.b.st-hatena.com/image/square/71831261509ff7d1fa431ca78b8ed1ef77f98468/height=288;version=1;width=512/https%3A%2F%2Fmiro.medium.com%2Fv2%2Fda%3Atrue%2Fresize%3Afit%3A1000%2F1%2A-fCK_LIT4kM5eSqgxJtqLw.gif)