.container > header {
  margin-bottom: 1.5rem;
}

.hidden {
  opacity: 0;
}

@media (min-width: 55em) {
  /* --wide-enough-for-two-columns */
  .container {
    display: grid;
    grid-column-gap: 2.9em;
    grid-template-columns: calc(1.45em * 9) 2fr;
  }

  .container > nav {
    grid-column: 1/2;
  }

  .container > main {
    grid-column: 2/3;
  }
}

.versionDropdown {
  display: flex;
  align-items: flex-start;
}