@media only screen and (max-width: 768px) {
  .container {
    flex-direction: column;
  }

  .optional-buttons {
    flex-direction: column;
    align-items: center;
  }

  .header-text {
    font-size: 25px;
  }

  .btns-o {
    margin-top: 7px;
  }
  .json-container {
    width: 300px;
  }
}