h2 {
  text-align: center;
  color: #333;
}
h3 {
  color: #555;
  margin-bottom: 10px;
}
label {
  display: block;
  margin: 8px 0;
  font-size: 16px;
}
input[type="checkbox"] {
  margin-right: 10px;
}
.submit-btn {
  display: block;
  width: 100%;
  padding: 10px;
  background-color: #4caf50;
  color: white;
  border: none;
  cursor: pointer;
  font-size: 18px;
  margin-top: 20px;
}
.submit-btn:hover {
  background-color: #45a049;
}
.error {
  color: red;
  text-align: center;
  margin-top: 10px;
}