:root {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

body {
  margin: 0;
  padding: 0;
  background: #fafafa;
  color: #222;
}

header {
  background: #111;
  color: #fff;
  padding: 24px;
  text-align: center;
}

main {
  max-width: 800px;
  margin: 40px auto;
  padding: 0 20px;
}

h1, h2 {
  margin-bottom: 12px;
}

section {
  margin-bottom: 40px;
}

ul {
  padding-left: 18px;
}

a {
  color: #0066cc;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

footer {
  text-align: center;
  padding: 20px;
  background: #eee;
  margin-top: 60px;
}