.reveal-content.active{display:block;animation:slideIn .5s ease-out}.tracker-item.completed{background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);color:#fff}.quiz-option.correct{background:#4caf50;color:#fff;border-color:#2e7d32}.quiz-option.incorrect{background:#ffcdd2;color:#c62828;border-color:#ef5350}.quiz-result.active{display:block;animation:slideIn .5s ease-out}.assessment-result.active{display:block;animation:slideIn .5s ease-out}.timeline-details.active{display:block;animation:slideIn .4s ease-out}