schlechtenburg/packages/core/lib/components/Block.scss

.sb-block {
  $block: &;

  display: flex;
  align-items: stretch;
  justify-items: stretch;
  height: auto;
  min-width: 32px;
  min-height: 32px;

  > * > .sb-toolbar {
    opacity: 0;
    pointer-events: none;
  }

  > .sb-block-ordering {
    opacity: 0;
    pointer-events: none;
  }

  &_active,
  &_active:hover {
    z-index: 1;
    outline: 4px solid var(--interact);

    > * > .sb-toolbar {
      opacity: 1;
      pointer-events: all;
      outline: 1px solid var(--grey-2);
    }

    > .sb-block-ordering {
      opacity: 1;
      pointer-events: all;
    }
  }

  &_highlighted {
    outline: 2px solid var(--interact);
  }
}