diff --git a/index.php b/index.php
index 9473db9..56dc615 100644
--- a/index.php
+++ b/index.php
@@ -59,6 +59,8 @@ $facebook_link = "https://www.facebook.com/profile.php?id=61587890927489";
             height: 100%;
             background: url('assets/images/background.jpg') center/cover no-repeat;
             z-index: -1;
+            transition: filter 0.1s ease-out, transform 0.1s ease-out;
+            will-change: filter, transform;
         }
 
         .background::after {
@@ -817,7 +819,7 @@ $facebook_link = "https://www.facebook.com/profile.php?id=61587890927489";
     </div>
 
     <script src="https://cdn.jsdelivr.net/npm/canvas-confetti@1.6.0/dist/confetti.browser.min.js"></script>
-    <audio id="radio-audio" src="https://listen.radioking.com/radio/828046/stream/897251" preload="none" crossorigin="anonymous"></audio>
+    <audio id="radio-audio" src="https://listen.radioking.com/radio/828046/stream/897251" preload="auto" crossorigin="anonymous"></audio>
     <audio id="welcome-sound" src="https://assets.mixkit.co/active_storage/sfx/2013/2013-preview.mp3" preload="auto"></audio>
 
     <script>
@@ -836,134 +838,161 @@ $facebook_link = "https://www.facebook.com/profile.php?id=61587890927489";
         let visualizerPeaks = [];
         let barHeights = new Array(BAR_COUNT).fill(5);
         let peakHeights = new Array(BAR_COUNT).fill(5);
+        const bg = document.querySelector('.background');
 
-        function initVisualizer() {
-            if (audioCtx) return;
-            
-            // Create bars and peaks
-            visualizerContainer.innerHTML = '';
-            visualizerBars = [];
-            visualizerPeaks = [];
-            barHeights = new Array(BAR_COUNT).fill(5);
-            peakHeights = new Array(BAR_COUNT).fill(5);
-
-            for (let i = 0; i < BAR_COUNT; i++) {
-                const barWrapper = document.createElement('div');
-                barWrapper.style.position = 'relative';
-                barWrapper.style.height = '100%';
-                barWrapper.style.display = 'flex';
-                barWrapper.style.alignItems = 'flex-end';
-                barWrapper.style.width = '18px';
-
-                const bar = document.createElement('div');
-                bar.className = 'visualizer-bar';
-                
-                const peak = document.createElement('div');
-                peak.className = 'visualizer-peak';
-                
-                barWrapper.appendChild(bar);
-                barWrapper.appendChild(peak);
-                visualizerContainer.appendChild(barWrapper);
-                
-                visualizerBars.push(bar);
-                visualizerPeaks.push(peak);
+        let colorOffset = 0;
+        function draw() {
+            if (audio.paused || audio.ended) {
+                animationId = null;
+                visualizerBars.forEach(bar => bar.style.height = '5px');
+                visualizerPeaks.forEach(peak => {
+                    peak.style.bottom = '5%';
+                    peak.style.background = 'linear-gradient(to bottom, #fff, transparent)';
+                    peak.style.boxShadow = '0 -2px 10px rgba(255, 255, 255, 0.8)';
+                });
+                document.documentElement.style.setProperty('--dynamic-glow', 'rgba(56, 189, 248, 0.7)');
+                document.documentElement.style.setProperty('--dynamic-glow-dim', 'rgba(56, 189, 248, 0.4)');
+                if (bg) {
+                    bg.style.filter = 'brightness(1)';
+                    bg.style.transform = 'scale(1)';
+                }
+                return;
             }
-
-            audioCtx = new (window.AudioContext || window.webkitAudioContext)();
-            analyzer = audioCtx.createAnalyser();
-            source = audioCtx.createMediaElementSource(audio);
-            source.connect(analyzer);
-            analyzer.connect(audioCtx.destination);
             
-            analyzer.fftSize = 128;
+            animationId = requestAnimationFrame(draw);
             const bufferLength = analyzer.frequencyBinCount;
             const dataArray = new Uint8Array(bufferLength);
+            analyzer.getByteFrequencyData(dataArray);
 
-            let colorOffset = 0;
-            function draw() {
-                if (audio.paused) {
-                    visualizerBars.forEach(bar => bar.style.height = '5px');
-                    visualizerPeaks.forEach(peak => {
-                        peak.style.bottom = '5%';
-                        peak.style.background = 'linear-gradient(to bottom, #fff, transparent)';
-                        peak.style.boxShadow = '0 -2px 10px rgba(255, 255, 255, 0.8)';
-                    });
-                    document.documentElement.style.setProperty('--dynamic-glow', 'rgba(56, 189, 248, 0.7)');
-                    document.documentElement.style.setProperty('--dynamic-glow-dim', 'rgba(56, 189, 248, 0.4)');
-                    return;
-                }
-                animationId = requestAnimationFrame(draw);
-                analyzer.getByteFrequencyData(dataArray);
+            colorOffset += 1;
 
-                colorOffset += 1;
-
-                for (let i = 0; i < BAR_COUNT; i++) {
-                    // Map frequency data to bars
-                    const freqIndex = Math.floor((i / BAR_COUNT) * (dataArray.length * 0.8));
-                    const val = dataArray[freqIndex];
-                    const targetHeight = (val / 255) * 100 + 5;
-                    
-                    // Retro "slow fall" logic
-                    if (targetHeight > barHeights[i]) {
-                        barHeights[i] = targetHeight; // Subida instantánea
-                    } else {
-                        barHeights[i] -= 1.5; // Caída lenta (decay)
-                        if (barHeights[i] < 5) barHeights[i] = 5;
-                    }
-                    
-                    if (visualizerBars[i]) {
-                        visualizerBars[i].style.height = `${barHeights[i]}%`;
-                    }
-
-                    // Peak logic
-                    if (barHeights[i] > peakHeights[i]) {
-                        peakHeights[i] = barHeights[i];
-                    } else {
-                        peakHeights[i] -= 0.8; // Peak falls even slower
-                        if (peakHeights[i] < 5) peakHeights[i] = 5;
-                    }
-
-                    if (visualizerPeaks[i]) {
-                        visualizerPeaks[i].style.bottom = `${peakHeights[i]}%`;
-                        
-                        // Color dinámico basado en la intensidad (altura del pico)
-                        // De 200 (Cian/Azul) en 0% a 0 (Rojo/Naranja) en 100%
-                        const hue = Math.max(0, 200 - (peakHeights[i] * 1.8));
-                        const color = `hsla(${hue}, 100%, 85%, 1)`;
-                        const glow = `hsla(${hue}, 100%, 60%, 0.9)`;
-                        
-                        visualizerPeaks[i].style.background = `linear-gradient(to bottom, ${color}, transparent)`;
-                        visualizerPeaks[i].style.boxShadow = `0 -2px 12px ${glow}, 0 0 20px ${glow}`;
-
-                        // Efecto Strobe en niveles críticos (> 90%) para un look agresivo
-                        if (peakHeights[i] > 90) {
-                            visualizerPeaks[i].classList.add('strobe');
-                            visualizerPeaks[i].style.setProperty('--peak-glow', glow);
-                        } else {
-                            visualizerPeaks[i].classList.remove('strobe');
-                        }
-                    }
-                }
-
-                // Dynamic glow effect based on average volume
-                let sum = 0;
-                for(let i=0; i<dataArray.length; i++) sum += dataArray[i];
-                const average = sum / dataArray.length;
-                const dominantHue = (average * 2 + colorOffset) % 360;
-                document.documentElement.style.setProperty('--dynamic-glow', `hsla(${dominantHue}, 100%, 60%, 0.8)`);
-                document.documentElement.style.setProperty('--dynamic-glow-dim', `hsla(${dominantHue}, 100%, 60%, 0.3)`);
+            // Bass detection for background flicker
+            // We use the first 4 bins (low frequencies)
+            const bassAvg = (dataArray[0] + dataArray[1] + dataArray[2] + dataArray[3]) / 4;
+            const bassIntensity = bassAvg / 255;
+            
+            // Apply flicker to background
+            if (bg) {
+                const brightness = 1 + (bassIntensity * 0.4); // More punchy
+                const scale = 1 + (bassIntensity * 0.02);
+                bg.style.filter = `brightness(${brightness})`;
+                bg.style.transform = `scale(${scale})`;
             }
-            draw();
+
+            for (let i = 0; i < BAR_COUNT; i++) {
+                // Map frequency data to bars (skipping very low and very high)
+                const freqIndex = Math.floor((i / BAR_COUNT) * (dataArray.length * 0.7)) + 1;
+                const val = dataArray[freqIndex];
+                const targetHeight = (val / 255) * 100 + 5;
+                
+                // Retro "slow fall" logic
+                if (targetHeight > barHeights[i]) {
+                    barHeights[i] = targetHeight; 
+                } else {
+                    barHeights[i] -= 2; 
+                    if (barHeights[i] < 5) barHeights[i] = 5;
+                }
+                
+                if (visualizerBars[i]) {
+                    visualizerBars[i].style.height = `${barHeights[i]}%`;
+                }
+
+                // Peak logic
+                if (barHeights[i] > peakHeights[i]) {
+                    peakHeights[i] = barHeights[i];
+                } else {
+                    peakHeights[i] -= 1.2; 
+                    if (peakHeights[i] < 5) peakHeights[i] = 5;
+                }
+
+                if (visualizerPeaks[i]) {
+                    visualizerPeaks[i].style.bottom = `${peakHeights[i]}%`;
+                    
+                    const hue = Math.max(0, 200 - (peakHeights[i] * 1.8));
+                    const color = `hsla(${hue}, 100%, 85%, 1)`;
+                    const glow = `hsla(${hue}, 100%, 60%, 0.9)`;
+                    
+                    visualizerPeaks[i].style.background = `linear-gradient(to bottom, ${color}, transparent)`;
+                    visualizerPeaks[i].style.boxShadow = `0 -2px 12px ${glow}, 0 0 20px ${glow}`;
+
+                    if (peakHeights[i] > 90) {
+                        visualizerPeaks[i].classList.add('strobe');
+                        visualizerPeaks[i].style.setProperty('--peak-glow', glow);
+                    } else {
+                        visualizerPeaks[i].classList.remove('strobe');
+                    }
+                }
+            }
+
+            // Dynamic glow effect based on average volume
+            let sum = 0;
+            for(let i=0; i<dataArray.length; i++) sum += dataArray[i];
+            const average = sum / dataArray.length;
+            const dominantHue = (average * 2 + colorOffset) % 360;
+            document.documentElement.style.setProperty('--dynamic-glow', `hsla(${dominantHue}, 100%, 60%, 0.8)`);
+            document.documentElement.style.setProperty('--dynamic-glow-dim', `hsla(${dominantHue}, 100%, 60%, 0.3)`);
         }
 
-        function togglePlay() {
+        function initVisualizer() {
+            // Create bars and peaks if not already created
+            if (visualizerBars.length === 0) {
+                visualizerContainer.innerHTML = '';
+                for (let i = 0; i < BAR_COUNT; i++) {
+                    const barWrapper = document.createElement('div');
+                    barWrapper.style.position = 'relative';
+                    barWrapper.style.height = '100%';
+                    barWrapper.style.display = 'flex';
+                    barWrapper.style.alignItems = 'flex-end';
+                    barWrapper.style.width = '18px';
+
+                    const bar = document.createElement('div');
+                    bar.className = 'visualizer-bar';
+                    
+                    const peak = document.createElement('div');
+                    peak.className = 'visualizer-peak';
+                    
+                    barWrapper.appendChild(bar);
+                    barWrapper.appendChild(peak);
+                    visualizerContainer.appendChild(barWrapper);
+                    
+                    visualizerBars.push(bar);
+                    visualizerPeaks.push(peak);
+                }
+            }
+
+            if (!audioCtx) {
+                try {
+                    audioCtx = new (window.AudioContext || window.webkitAudioContext)();
+                    analyzer = audioCtx.createAnalyser();
+                    source = audioCtx.createMediaElementSource(audio);
+                    source.connect(analyzer);
+                    analyzer.connect(audioCtx.destination);
+                    analyzer.fftSize = 128;
+                } catch (e) {
+                    console.error("AudioContext error:", e);
+                }
+            }
+            
             if (audioCtx && audioCtx.state === 'suspended') {
                 audioCtx.resume();
             }
 
+            if (!animationId && !audio.paused) {
+                draw();
+            }
+        }
+
+        audio.addEventListener('play', () => {
+            initVisualizer();
+        });
+
+        function togglePlay() {
             if (audio.paused) {
-                initVisualizer();
-                audio.play();
+                audio.play().then(() => {
+                    initVisualizer();
+                }).catch(err => {
+                    console.error("Error playing audio:", err);
+                });
                 playIcon.classList.remove('bi-play-fill');
                 playIcon.classList.add('bi-pause-fill');
                 playBtn.classList.add('playing');