.hidden-unicode {
  display: none;
}

#toggleUnicode {
  padding: 8px 16px;
  background: #004080; /* deep blue */
  color: #ffffff;      /* white text */
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-size: 14px;
}

#toggleUnicode:hover {
  background: #0059b3; /* lighter blue on hover */
}