#house-quiz-container {
  max-width: 960px;
  margin: 0 auto;
}
.option-btn {
  display: block;
  margin: 10px 0;
  padding: 12px;
  border: 1px solid #ccc;
  border-radius: 8px;
  background: #f8f8f8;
  cursor: pointer;
}
.option-btn.selected {
  background: #cce5ff;
  border-color: #007bff;
}