Reply To: What i'm missing here?

[Shikkediel]

This should scale properly:

.line:before, .line:after {
  content: '';
  width: 1px;
  height: 48%;
  position: absolute;
  top: 0;
  right: 0;
  left: 0;
  bottom: -54%;
  margin: auto;
  background-color: #000;
  transform-origin: 0 0;
}

.line:before {
  transform: rotate(45deg);
}

.line:after {
  transform: rotate(-45deg);
}