body {
  font-family: Arial, sans-serif;
  background-color: #f4f4f4;
  margin: 0;
  padding: 10px;
}
.container {
  max-width: 700px;
  margin: auto;
  background: white;
  padding: 20px;
  border-radius: 8px;
  box-shadow: 0px 2px 8px rgba(0,0,0,0.1);
}
h1 {
  font-size: 20px;
  margin-bottom: 20px;
}
.form-group {
  margin-bottom: 15px;
}
input[type="text"] {
  width: 100%;
  padding: 8px;
  margin-top: 5px;
}
.navigation {
  display: flex;
  justify-content: space-between;
  margin-top: 20px;
}
button {
  padding: 10px 15px;
  font-size: 14px;
  border: none;
  border-radius: 4px;
  background-color: #4caf50;
  color: white;
  cursor: pointer;
}
button:disabled {
  background-color: #aaa;
  cursor: not-allowed;
}
.question {
  margin-top: 20px;
}
.options label {
  display: block;
  margin: 5px 0;
}