factorio-clockmaster/src/assets/components/NumberInput.module.css

/* Wrapper ensures the total height is exactly 44px */
.numberInputWrap {
  display: inline-flex;
  align-items: stretch;
  height: 44px;
  border-radius: 4px;
  overflow: hidden;
}

/* The + and - buttons */
.numBtn {
  height: 44px;
  min-width: 10px;
  padding: 8px 6px;
  margin: 0;
}
/* The actual text input in the middle */
.numInput {
  width: 48px;
  text-align: center;
  height: 100%;
  font-family: inherit;
  font-size: 110%;
  font-weight: bold;
}

/* Hide native up/down arrows (spinners) */
.numInput {
  -moz-appearance: textfield;
}
.numInput::-webkit-outer-spin-button,
.numInput::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}