optr-decode-field .field {
  margin-top: 15px;
  background: #111;
  color: #fff;
  text-align: center;
  font-size: 24px;
  font-weight: normal;
  border-radius: 5px;
  padding: 10px;
  cursor: pointer;
}
optr-decode-field .copy-button {
  height: auto;
}