html {
  font-family: sans-serif;
  font-size: max(3ch, 2vw + 3vh);
  line-height: 1.618;
}

body {
  margin: 0;
  overflow-wrap: anywhere;
}

article {
  display: flex;
  flex-flow: column;
  margin: auto;
}

h1 {
  align-items: center;
  justify-content: center;
  display: flex;
  margin: 0;
  min-height: 100vh;
  order: 101;
}

p {
  margin: auto;
  margin-bottom: 1em;
  padding: 1em;
}

a {
  border-radius: 30% 30% 20% 20%;
  border: thick groove;
  display: inline-flex;
  flex-flow: column;
  margin: 2vw;
  padding: 2ex;
  padding-top: 5ex;
  padding-bottom: 3ex;
}

.caterpillar {
  align-items: center;
  box-sizing: border-box;
  display: flex;
  flex-flow: row wrap;
  margin: auto;
  min-height: 100vh;
}


@media (orientation: portrait) {
  h1 {
    writing-mode: vertical-rl;
  }
}