.readout {
  width: 28px;
  height: 16px;
  text-align: center;
  -moz-appearance: textfield;
  font: inherit;
  font-weight: bold;
}
[dir="ltr"] .readout {
  margin-left: 10px;
}
[dir="rtl"] .readout {
  margin-right: 10px;
}
.readout::-webkit-outer-spin-button,
.readout::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}