body { font-family: Arial, sans-serif; margin: 24px; }
.container { max-width: 900px; margin: 0 auto; }
.controls { display:flex; gap:12px; align-items:center; margin-bottom:16px; }
#questionCard { border:1px solid #ddd; padding:16px; border-radius:6px; }
.option { margin:8px 0; }
.buttons { margin-top:12px; display:flex; gap:8px; }
.hidden { display:none; }
#feedback.correct { color: green; }
#feedback.incorrect { color: red; }
#feedback.warning { color: orange; }