body {
  margin: 0;
  font-family: 'Segoe UI', sans-serif;
  background-color: #121212;
  color: #e0e0e0;
}

header {
  background: linear-gradient(to right, #0f2027, #203a43, #2c5364);
  padding: 20px;
  text-align: center;
  color: #ffffff;
  box-shadow: 0 2px 10px rgba(0,0,0,0.5);
}

main {
  padding: 20px;
}

iframe {
  border-radius: 12px;
  box-shadow: 0 0 20px rgba(0,255,255,0.2);
}

footer {
  background-color: #1e1e1e;
  text-align: center;
  padding: 10px;
  font-size: 12px;
  color: #888;
}