.display {
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
  font-size: 3rem;
  column-gap: 0.5rem;
}

.display span {
  order: 1;
}

.display #secMSB,
.display #secLSB {
  order: 2;
}

input {
  width: 2rem;
  margin: 0;
  font-size: 3rem;
  border: 1px solid grey;
  -webkit-appearance: none;
  -moz-appearance: textfield;
}

.display.progress input {
  border-color: transparent;
}

button {
  padding: 0.5rem 0.8rem;
  border: 1px solid grey;
  border-radius: 5px;
  box-shadow: 0 2px 5px 0 rgba(0, 0, 0, 0.15);
}