body {
  font-family: Arial, sans-serif;
  padding: 20px;
  background: #f7f7f7;
}
form {
  background: white;
  max-width: 700px;
  margin: auto;
  padding: 20px;
  border-radius: 8px;
  box-shadow: 0 0 10px rgba(0,0,0,0.1);
}
fieldset {
  margin-bottom: 15px;
  border: 1px solid #ccc;
  padding: 10px;
}
legend {
  font-weight: bold;
}
.hidden {
  display: none;
}
button {
  background-color: #007BFF;
  color: white;
  border: none;
  padding: 12px 24px;
  font-size: 1em;
  border-radius: 5px;
  cursor: pointer;
}
button:hover {
  background-color: #0056b3;
}
label {
  display: block;
  margin-bottom: 6px;
}