.CodeMirror {
  /* https://codemirror.net/demo/resize.html */
  height: auto;
}

.CodeMirror-gutters {
  background: var(--silver);
}

.CodeMirror-linenumber {
  background: var(--silver);
}

.CodeMirror {
  /* https://codemirror.net/demo/resize.html */
  height: auto;
  min-height: 150px;
}

.CodeMirror-scroll {
  min-height: 150px;
}

.CodeMirror-gutters {
  background: var(--silver);
}

.CodeMirror-linenumber {
  background: var(--silver);
}

Increase CodeMirror min-height to 7 lines
Increase CodeMirror min-height to 7 lines
