// Quiz form submit handler
document.addEventListener('DOMContentLoaded', () => {
    const form = document.getElementById('quiz-form');
    const btn = document.getElementById('submit-btn');
    if (form && btn) {
        form.addEventListener('submit', () => {
            btn.disabled = true;
            btn.textContent = 'Submitting...';
            btn.classList.add('opacity-50');
        });
    }
});