@charset "utf-8";

.double-strike {
  --line-thickness: 2px;
  --line-gap: 2px;
  --line-color: #ff0000;

  background: linear-gradient(
    transparent calc(50% - var(--line-gap) / 2 - var(--line-thickness)),
    var(--line-color) calc(50% - var(--line-gap) / 2 - var(--line-thickness)),
    var(--line-color) calc(50% - var(--line-gap) / 2),
    transparent calc(50% - var(--line-gap) / 2),
    transparent calc(50% + var(--line-gap) / 2),
    var(--line-color) calc(50% + var(--line-gap) / 2),
    var(--line-color) calc(50% + var(--line-gap) / 2 + var(--line-thickness)),
    transparent calc(50% + var(--line-gap) / 2 + var(--line-thickness))
  );
  background-repeat: no-repeat;
  background-position: center;
}