message: fix(theme): fix toggle button
diff: * toggle dark button
  */
  .toggle-dark-button {
  - display: flex;
  - margin: auto;
  + padding: 6px;
  border: 0;
  background: none;
  - color: var(--text-color);
  - opacity: 0.8;
  + color: var(--dark-grey);
  cursor: pointer;
  &:hover {
  - opacity: 1;
  + color: var(--theme-color);
  }
  .icon {
  