body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #0f172a;
  color: white;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

.container {
  text-align: center;
  background: #1e293b;
  padding: 40px;
  border-radius: 12px;
  box-shadow: 0 0 20px rgba(0,0,0,0.3);
}

button {
  margin-top: 20px;
  padding: 12px 20px;
  border: none;
  border-radius: 8px;
  background: #38bdf8;
  color: white;
  font-size: 16px;
  cursor: pointer;
  transition: 0.3s;
}

button:hover {
  background: #0ea5e9;
}