* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  line-height: 1.6;
  color: #1a1a1a;
  background: #ffffff;
}

header, main, footer {
  max-width: 960px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

header h1 {
  font-size: 2rem;
}

footer {
  color: #666;
  font-size: 0.875rem;
}