.mark {
  display: block;
  position: relative;
  overflow: hidden;
  font: 500 18px DM Mono;
}

.mark b,
.mark i {
  position: absolute;
  z-index: 1;
  font: inherit;
  line-height: 1;
}

.mark b {
  top: 12px;
  left: 9px;
  color: var(--paper);
}

.mark i {
  top: 16px;
  left: 22px;
  color: var(--acid);
  font-style: normal;
}

.mark::after {
  content: "";
  position: absolute;
  top: 8px;
  left: 22px;
  width: 1px;
  height: 29px;
  background: var(--acid);
  opacity: .45;
  transform: rotate(28deg);
}