.md-header__left,
.md-header__right {
  display: contents;
}

@media screen and (min-width: 60em) {
  .md-header__inner {
    padding-right: 13.3rem;
  }

  .md-header__left {
    display: flex;
    flex: 1 1 0;
    align-items: center;
    min-width: 0;
  }

  .md-header__right {
    display: flex;
    flex: 1 1 0;
    align-items: center;
    justify-content: flex-end;
  }

  /* Material sets only a left margin in LTR, which nudges the centred link off
     centre; make the spacing symmetric. */
  .md-header .md-header__source {
    margin-left: 1.4rem;
    margin-right: 1.4rem;
  }
}