.CodeMirror {
  border: 1px solid #eee;
  min-height: 500px;
  resize: vertical;
  overflow: hidden !important;
}

/* Add to your admin CSS or in a <style> tag */
/* .wp-editor-wrap {
  resize: both;
  overflow: auto;
  min-width: 300px;
  min-height: 500px;
  max-width: 100%;
  max-height: 90vh;
}
.wp-editor-wrap .CodeMirror {
  width: 100% !important;
  height: 100% !important;
} */
