body {
  font-family: Arial, sans-serif;
  background: #f9f9f9;
  margin: 0;
  padding: 20px;
}

#app {
  max-width: 600px;
  margin: 0 auto;
  background: #fff;
  padding: 20px;
  border-radius: 4px;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

header h1 {
  text-align: center;
}

#question-container {
  margin: 20px 0;
  padding: 10px;
  border-bottom: 1px solid #ccc;
}

button {
  padding: 10px 20px;
  margin: 5px;
  cursor: pointer;
}

input[type="radio"],
input[type="checkbox"] {
  margin-right: 10px;
}

textarea {
  width: 100%;
  min-height: 100px;
  padding: 5px;
}