Gimir

.menu::after {
  content: "";
  width: 1px;
  height: 130%;
  position: absolute;
  bottom: -37px;
  left: -134px;
  background-color: lightgrey;
  opacity: 1;
  transform: rotate(20.5deg);
  box-shadow: -5px 4px 30px rgba(0, 0, 0, .8);
  z-index: -1;
}