body {
  font-family: sans-serif;
  max-width: 600px;
  margin: 0 auto;
  padding: 0 20px;
}

div.centred-flex {/*
  display:flex;
  align-items: center;
  justify-content: center;
*/}

h1 {
  text-align: center;
  margin-bottom: 0.1em;
  margin-top: 0.5em;
}

h2 {
  text-align: center;
  font-weight: normal;
  margin-top: 0.1em;
  margin-bottom: 2em;
}