html, body {
  margin: 0;
  padding: 0;
  font-family: monospace;
}

body {
  width: 100vw;
  height: 100vh;
  overflow-y: hidden;
}

section {
  margin: 0 auto;
  width: 100vw;
  max-width: 80rem;
  height: 100vh;
  display: flex;
  flex-flow: column nowrap;
  justify-content: flex-start;
  align-items: flex-start;
  font-size: 2rem;
}

section h1 {
  width:100%;
  text-align: center;
}

pre {
  font-size: 1.8rem;
}

nav {
  position: fixed;
  top: 1rem;
  left: 1rem;
}

nav ol {
  list-style: none;
  padding: 0.5rem;
  background: white;
  border: 1px solid grey;
  z-index: 1;
}

nav .active {
  font-weight: 700;
}