* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.5;
  color: #1f2937;
  background: #f9fafb;
}

main {
  max-width: 48rem;
  margin: 4rem auto;
  padding: 0 1rem;
}