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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Kaku Gothic ProN", "Noto Sans JP", Helvetica, Arial, sans-serif;
  line-height: 1.8;
  max-width: 40rem;
  margin: 0 auto;
  padding: 2rem 1rem;
  color: #333;
}

nav {
  display: flex;
  gap: 1rem;
  margin-bottom: 2rem;
}

nav .lang-switch {
  margin-left: auto;
}

main {
  margin-bottom: 2rem;
}

footer {
  color: #999;
  font-size: 0.85rem;
}