body {
  font-family: Optima, Candara, "Noto Sans", source-sans-pro, sans-serif;
  margin: 3em 0;
  padding: 2em;
}

ul {
  list-style: none;
  padding: 0;
}

header,
main {
  max-width: 600px;
  margin: 0 auto 0;
}

main {
  margin-top: 5em;
}

li {
  margin-bottom: 5em;
}

audio {
  width: 100%;
}