ETHReport/assets/styles/base/mixins.scss

@mixin hasRedUnderline() {

  &::before {
    content: '';
    width: 100%;
    height: calculateRem(1);
    background-color: $red;
    position: absolute;
    bottom: calculateRem(3);
    left: 0;
    z-index: -1;
  }
}