body {
  max-width: 80em;
  margin: 2em auto;
  padding: 0 1em;
  font-family: sans-serif;
  line-height: 1.5;
}

table {
  border-collapse: collapse;
}

th, td {
  border: 1px solid #999;
  padding: 0.3em 0.6em;
}