.quiz-option.selected{border-color:var(--color-primary);background:rgba(22,163,74,.1)}.quiz-option.correct{background:rgba(16,185,129,.2);border-color:#10b981;color:#065f46}.quiz-option.incorrect{background:rgba(239,68,68,.2);border-color:#ef4444;color:#991b1b}.fade-in{opacity:0;transform:translateY(20px);transition:opacity .6s ease,transform .6s ease}.fade-in.visible{opacity:1;transform:translateY(0)}