:root {
  color-scheme: light dark;
}

body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  line-height: 1.6;
  background-color: white;
  color: black;
}

@media (prefers-color-scheme: dark) {
  body {
    background-color: #121212;
    color: #f0f0f0;
  }
  a {
    color: #58a6ff;
  }
}

header, footer {
  padding: 1em;
  text-align: center;
  background: #333;
  color: white;
}

header nav a {
  margin: 0 1em;
  text-decoration: none;
  color: white;
}

main {
  padding: 2em;
}