body {
  font-family: system-ui, sans-serif;
  margin: 0;
  padding: 4rem 1rem;
  background: #0f172a;
  color: #e5e7eb;
}

main {
  max-width: 720px;
  margin: auto;
}

a {
  color: #38bdf8;
  text-decoration: none;
}