.cell-output-stderr pre {
  border: 1px solid grey;
  padding: 1em;
}

.cell-output-stdout pre {
  border: 1px solid grey;
  padding: 1em;
}

.cell-output-display {
  border: 1px solid grey;
  padding-top: 1em;
  padding-left: 1em;
  padding-right: 1em;
  margin-bottom: 1em;
}