@function toRem($value) {
  $remValue: ($value / 16) + rem;
  @return $remValue;
}
@mixin fontFamily($fontSize, $fontWeight, $lineHeight, $textColor) {
  font-size: toRem($fontSize);
  font-weight: $fontWeight;
  line-height: toRem($lineHeight);
  color: $textColor;
}
