* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, sans-serif;
  color: #1a1a1a;
}

header {
  padding: 1rem 2rem;
  background: #0a3d62;
  color: #fff;
}

main {
  padding: 2rem;
}

footer {
  padding: 1rem 2rem;
  color: #666;
  font-size: 0.85rem;
}