body {
  font-family: 'Segoe UI', sans-serif;
  margin: 0;
  padding: 0;
  background: #1e1e2f;
  color: #f0f0f0;
}

header {
  background: #2c2c3c;
  padding: 1rem;
  text-align: center;
}

nav a {
  margin: 0 1rem;
  color: #00ffff;
  text-decoration: none;
}

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

main {
  padding: 2rem;
}

iframe {
  margin-top: 1rem;
  border: none;
}