.layout-guide {
  position: absolute;
  display: block;
  pointer-events: none;
  z-index: 30;
  background: #af52de;
  box-shadow: 0 0 0 1px rgba(255, 255, 255, .55);
}

.layout-guide[hidden] {
  display: none !important;
}

.layout-guide.vertical {
  top: 0;
  bottom: 0;
  width: 1px;
}

.layout-guide.horizontal {
  left: 0;
  right: 0;
  height: 1px;
}