.nav_c {
    width: 100%;
    padding-right: var(--bs-gutter-x, .75rem);
    padding-left: var(--bs-gutter-x, .75rem);
    margin-right: auto;
    margin-left: auto;
  }
  .nav_test {
    display: none;

  }
  .nav_btn {
    padding: 0.375rem 0.75rem;

  }