.toastui-editor-contents .toastui-editor-md-preview-highlight {
  position: relative;
  z-index: 0;
}

.toastui-editor-contents .toastui-editor-md-preview-highlight::after {
  content: '';
  background-color: rgba(255, 245, 131, 0.5);
  border-radius: 4px;
  z-index: -1;
  position: absolute;
  top: -4px;
  right: -4px;
  left: -4px;
  bottom: -4px;
}

.toastui-editor-contents h1.toastui-editor-md-preview-highlight::after,
.toastui-editor-contents h2.toastui-editor-md-preview-highlight::after {
  bottom: 0;
}

.toastui-editor-contents td.toastui-editor-md-preview-highlight::after,
.toastui-editor-contents th.toastui-editor-md-preview-highlight::after {
  display: none;
}

.toastui-editor-contents th.toastui-editor-md-preview-highlight,
.toastui-editor-contents td.toastui-editor-md-preview-highlight {
  background-color: rgba(255, 245, 131, 0.5);
}

.toastui-editor-contents th.toastui-editor-md-preview-highlight {
  color: #222;
}