body {
  font-family: -apple-system, BlinkMacSystemFont, Arial, sans-serif;
  margin: 0;
  padding: 0;
  text-align: center;
  background-color: #f4f4f4;
  color: #333;
}
header {
  background: #004080;
  color: white;
  padding: 24px 16px;
}
.logo {
  max-width: 160px;
  height: auto;
  display: block;
  margin: 0 auto 12px;
}
h1 {
  margin: 0;
}
main {
  padding: 40px 20px;
}
section {
  max-width: 720px;
  margin: 0 auto;
}
footer {
  background: #222;
  color: #aaa;
  padding: 12px;
  margin-top: 24px;
  font-size: 14px;
}