body {
  font-family: Arial, sans-serif;
  background: #0c0c0c;
  color: #f8f8f8;
  margin: 0;
  padding: 0;
  text-align: center;
}
header {
  background: #1e1e1e;
  padding: 2rem;
}
main {
  margin: 3rem 0;
}
.btn-play {
  display: inline-block;
  padding: 1rem 2rem;
  background: #ff8800;
  color: #fff;
  text-decoration: none;
  font-weight: bold;
  border-radius: 8px;
}
footer {
  margin-top: 4rem;
  font-size: 0.8rem;
  color: #888;
}