message: Put hero below mobile overlay
diff: border-right: 1px solid $gray-color;
  background-color: #ffffff;
  transition-property: transform;
  + z-index: 2;
  @include mobile-only() {
  transform: translateX(-100%);
  opacity: 0;
  transition-property: opacity;
  display: block;
  -
  + z-index: 1;
  &.visible {
  top: 0;
  left: 0;
  