* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  height: 100%;
}

.Overflowable {
  display: flex;

  ol {
    display: flex;
    flex-wrap: nowrap;
    list-style: none;
    margin: 0;
    padding: 0;
  }

  li {
    flex: 0 0 auto;
  }

  a {
    display: block;
    outline-offset: -2px;
    padding: 0.5em 1em;
  }

  &:not(:has(.PrimaryNavigationList [hidden])) example-dropdown {
    visibility: hidden;
  }
}

.PrimaryNavigationList {
  flex: 1 1 auto;
  flex-direction: row;
  overflow: hidden;

  [hidden] {
    display: block;
    visibility: hidden;
  }
}

.SecondaryNavigationList {
  flex-direction: column;
}

example-dropdown {
  flex: 0 0 auto;
}