.accordion__panel[aria-hidden=true] {
  display: none;
}

button.js-accordion__header.accordion__header {
  background: none !important;
  color: inherit;
  border: none;
  padding: 0 !important;
  font: inherit;
  /*border is optional*/
  border-bottom: 1px solid #444;
  cursor: pointer;
  display: block;
}

.CodeMirror { border: 1px solid silver; height: 100%; }
.CodeMirror-empty { outline: 1px solid #c22; }
.CodeMirror-empty.CodeMirror-focused { outline: none; }
.CodeMirror pre.CodeMirror-placeholder { color: #999; }
.cm-delimit {color: #fa4;}
.cm-inner-delimit {
  color: #fa4;
}