/* Main nav with five buttons. /style.css lays the nav out in 2 columns (4 from 560px); the fifth
   button (Jukebox) runs across its own row until there is room for all five side by side. */
.nav a:last-child { grid-column: 1 / -1; }

@media (min-width: 700px) {
  .nav { grid-template-columns: repeat(5, 1fr); }
  .nav a:last-child { grid-column: auto; }
}