added manager audio

audioManager.js

@@ -0,0 +1,55 @@
+const AudioManager = {
+    isMuted: false,
+    sounds: {
+        bg: document.getElementById("bgMusic"),
+        click: document.getElementById("sfxClick"),
+        match: document.getElementById("sfxMatch"),
+        wrong: document.getElementById("sfxWrong"),
+        countdown: document.getElementById("sfxCountdown"),
+        win: document.getElementById("sfxWin"),
+        lose: document.getElementById("sfxLose")
+    },
+    toggleBtn: document.getElementById("toggleMusic"),
+
+    init: function() {
+        this.toggleBtn.textContent = "🔊"; 
+        this.toggleBtn.onclick = (e) => {
+            e.stopPropagation();
+            this.toggleMute();
+        };
+        if (this.sounds.bg) {
+            this.sounds.bg.volume = 0.5;
+            this.playMusic(); 
+        }
+    },
+
+    toggleMute: function() {
+        this.isMuted = !this.isMuted; 
+        if (this.isMuted) {
+            if(this.sounds.bg) this.sounds.bg.pause();
+            this.toggleBtn.textContent = "🔇";
+        } else {
+            this.playMusic();
+            this.toggleBtn.textContent = "🔊";
+        }
+    },
+
+    playMusic: function() {
+        if (!this.isMuted && this.sounds.bg) {
+            this.sounds.bg.play().catch(e => console.log("Autoplay waiting for interaction..."));
+        }
+    },
+
+    playSFX: function(type) {
+        if (this.isMuted) return; 
+        const audio = this.sounds[type];
+        if (audio) {
+            audio.currentTime = 0;
+            audio.play().catch(() => {});
+            if (this.sounds.bg && this.sounds.bg.paused) {
+                this.playMusic();
+            }
+        }
+    }
+};
+AudioManager.init();