body {
  font-family: 'Segoe UI', sans-serif;
  background-color: #0d0d0d;
  color: #f0f0f0;
  margin: 0;
  padding: 0;
}
header {
  background-color: #1a1a1a;
  padding: 1rem;
  text-align: center;
}
nav a {
  color: #00ffff;
  margin: 0 1rem;
  text-decoration: none;
}
nav a:hover {
  text-decoration: underline;
}
main {
  padding: 2rem;
}
footer {
  background-color: #1a1a1a;
  text-align: center;
  padding: 1rem;
  position: fixed;
  width: 100%;
  bottom: 0;
}