body {
  font-family: 'Helvetica Neue', Arial, sans-serif;
  color: #000;
  margin: 16px;
  max-width: 640px;
}

nav {
  font-size: 24px;
}

h1 {
  font-size: 48px;
}

h2 {
  font-size: 32px;
}

a {
  /* text-decoration: none; */
  color: inherit;
}

.img {
  text-align: center;
  padding: 32px;
}

.img img {
  display: inline-block;
  padding-left: 16px;
  padding-right: 16px;
}