body {
  font-family: Arial, sans-serif;
  background: #f4f4f4;
  margin: 0;
  padding: 20px;
}
.container {
  background: #fff;
  border-radius: 10px;
  padding: 30px;
  max-width: 600px;
  margin: 40px auto;
  box-shadow: 0 0 10px rgba(0,0,0,0.1);
}
button {
  padding: 10px 20px;
  margin-top: 20px;
  font-size: 16px;
  cursor: pointer;
  background-color: #3498db;
  color: white;
  border: none;
  border-radius: 5px;
}
button:hover {
  background-color: #2980b9;
}
p {
  margin: 10px 0;
}