vokimkhanh393-ctrl

## index.html
<!DOCTYPE html>
<html lang="vi">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Săn Kho Báu Số - Toán Lớp 4</title>
    <script src="https://cdn.tailwindcss.com"></script>
    <!-- Firebase SDKs -->
    <script type="module">
        import { initializeApp } from "https://www.gstatic.com/firebasejs/11.6.1/firebase-app.js";

## index.html
<!DOCTYPE html>
<html lang="vi">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Săn Kho Báu Số - Toán Lớp 4</title>
    <!-- Tailwind CSS CDN -->
    <script src="https://cdn.tailwindcss.com"></script>
    <!-- Tone.js CDN for Sound Effects -->
    <script src="https://cdnjs.cloudflare.com/ajax/libs/tone/14.8.49/Tone.js"></script>
	<!DOCTYPE html>
	<html lang="vi">
	<head>
	<meta charset="UTF-8">
	<meta name="viewport" content="width=device-width, initial-scale=1.0">
	<title>Săn Kho Báu Số - Toán Lớp 4</title>
	<script src="https://cdn.tailwindcss.com"></script>
	<!-- Firebase SDKs -->
	<script type="module">
	import { initializeApp } from "https://www.gstatic.com/firebasejs/11.6.1/firebase-app.js";