#bottle-to-cup-guide-wrapper .milestone-item.checked{border-left:5px solid #28a745;background:#d4edda}#bottle-to-cup-guide-wrapper .milestone-item.checked .checkbox-custom{background:#28a745;border-color:#28a745}#bottle-to-cup-guide-wrapper .milestone-item.checked .checkmark{display:block}#bottle-to-cup-guide-wrapper .flip-card.flipped .flip-card-inner{transform:rotateY(180deg)}#bottle-to-cup-guide-wrapper .timeline-stage.active{border-left-color:#28a745;background:linear-gradient(135deg,#e8f5e9 0%,#c8e6c9 100%)}#bottle-to-cup-guide-wrapper .quiz-option.correct{border-color:#28a745;background:#d4edda}#bottle-to-cup-guide-wrapper .quiz-option.incorrect{border-color:#dc3545;background:#f8d7da}