<style>
  #backButton {
    background-color: #23406F;
    color: #f8f8f8;
    border: none;
    border-radius: 10px;
    padding: 10px 20px;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
  }

  #backButton:hover {
    background-color: #FFFFFF;
    color: #23406F;
  }
</style>