summary::-webkit-details-marker {
  display: none
}

.checker-background::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  background-image: linear-gradient(#e6e6e690 1px, transparent 1px),
  linear-gradient(90deg, #e6e6e690 1px, transparent 1px);
  background-size: 3.7em 3.7em;
  -webkit-mask-image: radial-gradient(ellipse at 50% 40%, black 0%, transparent 55%);
  mask-image: radial-gradient(ellipse at 50% 40%, black 0%, transparent 55%);
  z-index: -1;
  background-position-x: center;
}
