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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: #f5f5f5;
  color: #333;
}

header {
  background: #1a1a2e;
  color: #fff;
  padding: 1rem 2rem;
}

main {
  max-width: 960px;
  margin: 2rem auto;
  padding: 0 1rem;
}