:root {
  font-family: system-ui, sans-serif;
  color: #172a35;
  background: #f6f8fa;
}
body {
  margin: 0;
}
main {
  max-width: 960px;
  margin: 4rem auto;
  padding: 0 1.5rem;
}
h1 {
  font-size: 2.8rem;
}
section {
  margin-top: 3rem;
}
article {
  padding: 1.5rem;
  background: white;
  border: 1px solid #dae2e7;
  border-radius: 0.5rem;
  margin: 1rem 0;
}
p {
  line-height: 1.8;
  white-space: pre-wrap;
}