body { font-family: 'Inter', sans-serif; background-color: #f8f9fa; }
        .card { border: none; border-radius: 12px; box-shadow: 0 4px 12px rgba(0,0,0,0.05); }
        .option-box { cursor: pointer; transition: 0.2s; border: 1px solid #ddd; border-radius: 8px; padding: 12px; margin-bottom: 8px; background: white; }
        .option-box:hover { border-color: #0d6efd; background: #f0f7ff; }
        .option-box input:checked + label { color: #0d6efd; font-weight: 700; }
        .selected { border: 2px solid #0d6efd !important; background: #f0f7ff !important; }
        #scoreBoard { display: none; }
        .nav-link.active { font-weight: bold; border-bottom: 2px solid #0d6efd; }