/* center the dropdown */
.version-selector {
    display: flex;
    justify-content: center;
    margin: 1em 0;
  }
  
  /* treat the <select> like your .btn.version-switcher__button */
  .version-selector select {
    color: var(--pst-color-text-base);
    border: 1px solid var(--pst-color-border);
    box-sizing: border-box;
    font-size: 1.1em;
    min-height: 24px;
    min-width: 24px;
    z-index: 1055;
  
    /* from the .btn-sm rules */
    padding: 0.25rem 0.5rem;
    border-radius: var(--bs-border-radius-sm);
  
    /* pointer and nowrap as in .dropdown-toggle */
    cursor: pointer;
    white-space: nowrap;
  
    /* match your site background */
    background-color: var(--pst-color-bg);
  }
  
  /* focus shadow like your --bs-btn-focus-box-shadow */
  .version-selector select:focus {
    outline: none;
    box-shadow: none;
  }