calculator > editor {
  display: block;
  min-height: 300px;
  outline: none;
  padding: 5px;
}

calculatorLine {
  display: block;
  margin-bottom: 10px;
}

calculatorLine:after {
  content: attr(value);
  color: maroon;
}

calculatorText {
  color: #999;
}

calculatorMeaningfulText {
  color: maroon;
}