  .toggle-button {
        position: fixed;
        top: 0.75rem;
        right: 0.75rem;
        width: 1.5rem;
        background-color: #fff;
        line-height: 1.5rem;
        border: 1px solid rgba(0, 0, 0, 10%);
        border-radius: 2px;
        box-shadow: 1px 1px rgba(0, 0, 0, 10%);
        cursor: pointer;
      }
      .toggle-button::before {
        content: '\25c0';
        padding-left: 0.25rem;
      }
      .open .toggle-button::before {
        content: '\25b6';
      }

      @media (m