* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: #1a1a1a;
  background-color: #fafafa;
}

header {
  padding: 1.5rem 2rem;
  border-bottom: 1px solid #e0e0e0;
}

header h1 {
  margin: 0 0 0.5rem 0;
}

nav a {
  margin-right: 1rem;
  color: #2563eb;
  text-decoration: none;
}

nav a:hover {
  text-decoration: underline;
}

main {
  padding: 2rem;
}