.option-btn.selected{background:#27ae60;box-shadow:0 0 0 3px rgba(39,174,96,.3)}.result-box.show{display:block;animation:slideIn .5s ease}.flip-content.revealed{display:block}.time-btn.active{background:#27ae60;border-color:#27ae60;color:white}.match-card.matched{background:#d4edda;border-color:#28a745;pointer-events:none}