body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  background: #f7f7f7;
}

.container {
  text-align: center;
  padding: 20px;
  background: white;
  border-radius: 12px;
  box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

button {
  padding: 10px 20px;
  font-size: 16px;
  margin-top: 15px;
  cursor: pointer;
  border: none;
  background-color: #ff4d4f;
  color: white;
  border-radius: 8px;
}