body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #0f172a;
  color: #e2e8f0;
  line-height: 1.6;
}
main {
  max-width: 760px;
  margin: 0 auto;
  padding: 32px 16px;
}
a {
  color: #38bdf8;
}
h1,
h2 {
  line-height: 1.2;
}
section {
  margin-top: 28px;
}