.result-box.show{display:block;animation:slideIn .5s ease}.flip-card.flipped .flip-card-back{display:block}.progress-item.checked .checkbox{background:#27ae60;border-color:#27ae60}.progress-item.checked .checkbox::after{content:"✓";color:white;font-weight:700;font-size:1.2em}.myth-card.revealed{background:#27ae60;color:white;border-color:#27ae60}.myth-card.revealed .fact-content{display:block}