body {
  font-family: Arial, sans-serif;
  background-color: #f4f4f4;
  text-align: center;
  margin-top: 100px;
}

.container {
  background: white;
  padding: 30px;
  border-radius: 15px;
  width: 300px;
  margin: auto;
  box-shadow: 0 0 15px rgba(0,0,0,0.1);
}

button {
  padding: 10px 20px;
  border: none;
  background-color: #3498db;
  color: white;
  border-radius: 5px;
  cursor: pointer;
}

button:hover {
  background-color: #2980b9;
}