:root {
  color-scheme: light dark;
  font-family: system-ui, sans-serif;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main {
  flex: 1;
  max-width: 40rem;
  margin: 0 auto;
  padding: 4rem 1rem;
  text-align: center;
}

.buy {
  font-size: 1.1rem;
  padding: 0.75rem 1.5rem;
  cursor: pointer;
}

footer {
  display: flex;
  gap: 1rem;
  justify-content: center;
  padding: 1rem;
}