#teen-nutrition-article-wrapper .quiz-option.selected{background:#fef3c7;border-color:#f59e0b}#teen-nutrition-article-wrapper .flip-card.flipped{transform:rotateY(180deg)}#teen-nutrition-article-wrapper .progress-item.completed .progress-checkbox{background:#6366f1;border-color:#6366f1}#teen-nutrition-article-wrapper .progress-item.completed .progress-checkbox::after{content:"✓";color:white;font-size:18px;font-weight:700}#teen-nutrition-article-wrapper .progress-item.completed .progress-text{text-decoration:line-through;opacity:.7}#teen-nutrition-article-wrapper .slider-container{margin:25px 0}