body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #1a1a1a;
  color: #f0f0f0;
}
header {
  background: #000;
  padding: 1em;
  text-align: center;
}
header h1 {
  color: #ff6a00;
  margin: 0;
}
header nav a {
  color: #f0f0f0;
  margin: 0 10px;
  text-decoration: none;
  font-weight: bold;
}
main {
  padding: 2em;
}
footer {
  background: #000;
  color: #888;
  text-align: center;
  padding: 1em;
  position: relative;
  bottom: 0;
  width: 100%;
}