body {
  font-family: Arial, sans-serif;
  background-color: #f4f4f4;
  margin: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

.container {
  background-color: #fff;
  padding: 20px;
  border-radius: 8px;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

button {
  background-color: #4caf50;
  color: #fff;
  padding: 10px;
  border: none;
  border-radius: 4px;
  cursor: pointer;
}