body {
  margin: 0;
  font-family: system-ui, sans-serif;
  background-color: #0f172a;
  color: white;
}

.container {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 20px;
}

iframe {
  border-radius: 12px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.5);
}

.hint {
  margin-top: 10px;
  opacity: 0.8;
}