.quiz-option.selected{background:rgba(255,255,255,.35);border-color:#ffd700}.budget-option.selected{background:rgba(255,255,255,.4);border:2px solid white}.day-btn.active{background:#d63031;border-color:white}.tracker-item.completed .tracker-checkbox{background:#fff}.tracker-item.completed .tracker-checkbox::after{content:"✓";color:#f5576c;font-weight:700;font-size:1.2em}