Reproductor de Música con Visualizador

.visualizer-player {
  max-width: 480px;
  margin: 0 auto;
  background: linear-gradient(135deg, #0a0a0a 0%, #1a1a2e 50%, #16213e 100%);
  border-radius: 24px;
  overflow: hidden;
  position: relative;
  box-shadow: 
    0 25px 50px rgba(0, 0, 0, 0.5),
    inset 0 1px 0 rgba(255, 255, 255, 0.1);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  color: #ffffff;
}

.visualizer-background {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  overflow: hidden;
}

#visualizer-canvas {
  width: 100%;
  height: 100%;
  opacity: 0.6;
}

.particles-container {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  pointer-events: none;
}

.particle {
  position: absolute;
  width: 3px;
  height: 3px;
  background: radial-gradient(circle, #00f5ff, transparent);
  border-radius: 50%;
  animation: float 4s ease-in-out infinite;
}

.player-content {
  position: relative;
  z-index: 10;
  padding: 32px 24px;
  backdrop-filter: blur(10px);
}

.album-section {
  display: flex;
  align-items: center;
  gap: 20px;
  margin-bottom: 32px;
}

.album-artwork {
  position: relative;
}

.album-image {
  width: 100px;
  height: 100px;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.pulse-ring {
  position: absolute;
  width: 100%;
  height: 100%;
  border: 2px solid rgba(0, 245, 255, 0.6);
  border-radius: 50%;
  animation: pulse 2s ease-out infinite;
}

.pulse-ring-2 {
  animation-delay: 1s;
  border-color: rgba(255, 0, 110, 0.6);
}

.album-cover-img {
  width: 80px;
  height: 80px;
  background: linear-gradient(45deg, #ff006e, #8338ec, #3a86ff, #00f5ff);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 30px rgba(0, 245, 255, 0.4);
  position: relative;
  z-index: 2;
}

.now-playing-indicator {
  position: absolute;
  bottom: -10px;
  right: -10px;
  background: rgba(0, 0, 0, 0.8);
  border-radius: 12px;
  padding: 8px;
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.sound-wave {
  display: flex;
  align-items: end;
  gap: 2px;
  height: 16px;
}

.wave {
  width: 3px;
  background: linear-gradient(to top, #ff006e, #00f5ff);
  border-radius: 2px;
  animation: wave 1.5s ease-in-out infinite;
}

.wave:nth-child(1) { height: 40%; animation-delay: 0s; }
.wave:nth-child(2) { height: 80%; animation-delay: 0.1s; }
.wave:nth-child(3) { height: 60%; animation-delay: 0.2s; }
.wave:nth-child(4) { height: 90%; animation-delay: 0.3s; }

.track-metadata h2 {
  font-size: 22px;
  font-weight: 700;
  margin: 0 0 6px 0;
  background: linear-gradient(45deg, #00f5ff, #ff006e);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.track-metadata p {
  font-size: 16px;
  color: #a0a0a0;
  margin: 0 0 12px 0;
}

.track-stats {
  display: flex;
  gap: 12px;
}

.genre, .bpm {
  padding: 4px 10px;
  background: rgba(0, 245, 255, 0.2);
  border: 1px solid rgba(0, 245, 255, 0.3);
  border-radius: 12px;
  font-size: 11px;
  color: #00f5ff;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.bpm {
  background: rgba(255, 0, 110, 0.2);
  border-color: rgba(255, 0, 110, 0.3);
  color: #ff006e;
}

.spectrum-analyzer {
  margin-bottom: 24px;
  padding: 20px;
  background: rgba(0, 0, 0, 0.4);
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.frequency-bars {
  display: flex;
  align-items: end;
  justify-content: space-between;
  height: 80px;
  margin-bottom: 8px;
}

.freq-bar {
  width: 8%;
  background: linear-gradient(to top, #ff006e 0%, #8338ec 50%, #00f5ff 100%);
  border-radius: 4px 4px 0 0;
  min-height: 4px;
  animation: frequency 2s ease-in-out infinite;
  box-shadow: 0 0 10px rgba(0, 245, 255, 0.3);
}

.freq-bar:nth-child(1) { height: 20%; animation-delay: 0s; }
.freq-bar:nth-child(2) { height: 45%; animation-delay: 0.1s; }
.freq-bar:nth-child(3) { height: 30%; animation-delay: 0.2s; }
.freq-bar:nth-child(4) { height: 70%; animation-delay: 0.3s; }
.freq-bar:nth-child(5) { height: 85%; animation-delay: 0.4s; }
.freq-bar:nth-child(6) { height: 55%; animation-delay: 0.5s; }
.freq-bar:nth-child(7) { height: 40%; animation-delay: 0.6s; }
.freq-bar:nth-child(8) { height: 65%; animation-delay: 0.7s; }
.freq-bar:nth-child(9) { height: 35%; animation-delay: 0.8s; }
.freq-bar:nth-child(10) { height: 25%; animation-delay: 0.9s; }

.frequency-labels {
  display: flex;
  justify-content: space-between;
  font-size: 10px;
  color: #666;
  text-transform: uppercase;
}

.progress-visualization {
  margin-bottom: 24px;
}

.time-info {
  display: flex;
  justify-content: space-between;
  margin-bottom: 12px;
  font-size: 14px;
  color: #a0a0a0;
  font-weight: 500;
}

.waveform-progress {
  position: relative;
  height: 60px;
  cursor: pointer;
}

.waveform-svg {
  width: 100%;
  height: 100%;
}

.progress-thumb {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 16px;
  height: 16px;
  background: #00f5ff;
  border-radius: 50%;
  box-shadow: 0 0 20px rgba(0, 245, 255, 0.8);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.waveform-progress:hover .progress-thumb {
  opacity: 1;
}

.control-interface {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}

.playback-controls {
  display: flex;
  align-items: center;
  gap: 16px;
}

.ctrl-btn {
  width: 44px;
  height: 44px;
  border: none;
  background: rgba(255, 255, 255, 0.1);
  color: #ffffff;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.ctrl-btn:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: scale(1.1);
  box-shadow: 0 0 25px rgba(0, 245, 255, 0.4);
}

.ctrl-btn.active {
  background: linear-gradient(45deg, #ff006e, #00f5ff);
  box-shadow: 0 0 25px rgba(255, 0, 110, 0.6);
}

.ctrl-btn svg {
  width: 20px;
  height: 20px;
}

.play-button {
  width: 64px;
  height: 64px;
  border: none;
  background: linear-gradient(45deg, #ff006e, #8338ec, #00f5ff);
  color: white;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
  box-shadow: 0 10px 30px rgba(255, 0, 110, 0.4);
  position: relative;
  overflow: hidden;
}

.play-button::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  transition: left 0.6s ease;
}

.play-button:hover {
  transform: scale(1.05);
  box-shadow: 0 15px 40px rgba(255, 0, 110, 0.6);
}

.play-button:hover::before {
  left: 100%;
}

.play-button svg {
  width: 28px;
  height: 28px;
}

.audio-controls {
  display: flex;
  align-items: center;
  gap: 16px;
}

.volume-section {
  display: flex;
  align-items: center;
  gap: 12px;
}

.volume-slider {
  width: 80px;
  position: relative;
}

.volume-slider input[type="range"] {
  width: 100%;
  height: 4px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 2px;
  outline: none;
  -webkit-appearance: none;
  position: relative;
  z-index: 2;
}

.volume-slider input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px;
  height: 14px;
  background: #00f5ff;
  border-radius: 50%;
  cursor: pointer;
  box-shadow: 0 0 15px rgba(0, 245, 255, 0.8);
}

.volume-fill {
  position: absolute;
  top: 50%;
  left: 0;
  height: 4px;
  background: linear-gradient(90deg, #ff006e, #00f5ff);
  border-radius: 2px;
  transform: translateY(-50%);
  width: 80%;
  z-index: 1;
}

.playlist-visualizer {
  background: rgba(0, 0, 0, 0.3);
  border-radius: 16px;
  padding: 20px;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.playlist-visualizer h3 {
  font-size: 16px;
  font-weight: 600;
  margin: 0 0 16px 0;
  color: #a0a0a0;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.queue-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 8px;
  border-radius: 12px;
  cursor: pointer;
  transition: all 0.3s ease;
  margin-bottom: 8px;
}

.queue-item:hover {
  background: rgba(255, 255, 255, 0.1);
  transform: translateX(4px);
}

.queue-item.active {
  background: linear-gradient(90deg, rgba(255, 0, 110, 0.2), rgba(0, 245, 255, 0.2));
  border: 1px solid rgba(255, 0, 110, 0.3);
}

.queue-visualizer {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.mini-bars {
  display: flex;
  align-items: end;
  gap: 2px;
  height: 12px;
}

.mini-bar {
  width: 2px;
  background: linear-gradient(to top, #ff006e, #00f5ff);
  border-radius: 1px;
  animation: miniWave 1.5s ease-in-out infinite;
}

.mini-bar:nth-child(1) { height: 40%; animation-delay: 0s; }
.mini-bar:nth-child(2) { height: 80%; animation-delay: 0.2s; }
.mini-bar:nth-child(3) { height: 60%; animation-delay: 0.4s; }

.queue-info {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.queue-title {
  font-size: 14px;
  font-weight: 500;
  color: #ffffff;
}

.queue-artist {
  font-size: 12px;
  color: #a0a0a0;
}

.queue-duration {
  font-size: 12px;
  color: #a0a0a0;
  font-weight: 500;
}

/* Animaciones */
@keyframes pulse {
  0% {
    transform: scale(1);
    opacity: 1;
  }
  100% {
    transform: scale(1.4);
    opacity: 0;
  }
}

@keyframes wave {
  0%, 100% { transform: scaleY(1); }
  50% { transform: scaleY(1.5); }
}

@keyframes frequency {
  0%, 100% { transform: scaleY(1); }
  50% { transform: scaleY(1.3); }
}

@keyframes miniWave {
  0%, 100% { transform: scaleY(1); }
  50% { transform: scaleY(1.4); }
}

@keyframes float {
  0%, 100% {
    transform: translateY(0px) rotate(0deg);
    opacity: 0;
  }
  10% {
    opacity: 1;
  }
  90% {
    opacity: 1;
  }
  100% {
    transform: translateY(-100px) rotate(360deg);
    opacity: 0;
  }
}

/* Estado de reproducción */
.visualizer-player.playing .wave,
.visualizer-player.playing .freq-bar,
.visualizer-player.playing .mini-bar {
  animation-play-state: running;
}

.visualizer-player:not(.playing) .wave,
.visualizer-player:not(.playing) .freq-bar,
.visualizer-player:not(.playing) .mini-bar {
  animation-play-state: paused;
}

/* Diseño responsivo */
@media (max-width: 520px) {
  .visualizer-player {
    margin: 16px;
  }
  
  .player-content {
    padding: 24px 20px;
  }
  
  .album-section {
    flex-direction: column;
    text-align: center;
    gap: 16px;
  }
  
  .control-interface {
    flex-direction: column;
    gap: 20px;
  }
  
  .playback-controls {
    order: 1;
  }
  
  .audio-controls {
    order: 2;
  }
}

document.addEventListener('DOMContentLoaded', () => {
  // Elementos
  const player = document.querySelector('.visualizer-player');
  const canvas = document.getElementById('visualizer-canvas');
  const ctx = canvas.getContext('2d');
  const particlesContainer = document.getElementById('particles-container');
  const playBtn = document.getElementById('play-btn');
  const prevBtn = document.getElementById('prev-btn');
  const nextBtn = document.getElementById('next-btn');
  const shuffleBtn = document.getElementById('shuffle-btn');
  const repeatBtn = document.getElementById('repeat-btn');
  const volumeBtn = document.getElementById('volume-btn');
  const volumeRange = document.getElementById('volume-range');
  const eqBtn = document.getElementById('eq-btn');
  const trackTitle = document.getElementById('track-title');
  const trackArtist = document.getElementById('track-artist');
  const currentTimeEl = document.getElementById('current-time');
  const totalTimeEl = document.getElementById('total-time');
  const progressThumb = document.getElementById('progress-thumb');
  const waveformProgress = document.getElementById('waveform-progress');
  const playIcon = document.querySelector('.play-icon');
  const pauseIcon = document.querySelector('.pause-icon');
  const queueItems = document.querySelectorAll('.queue-item');
  
  // Estado
  let currentTrackIndex = 0;
  let isPlaying = false;
  let isShuffled = false;
  let repeatMode = 0;
  let currentTime = 165; // 2:45
  let duration = 332; // 5:32
  let animationId;
  let particles = [];
  
  // Inicializar
  setupCanvas();
  loadTrack(currentTrackIndex);
  updateProgress();
  createParticles();
  
  function setupCanvas() {
    const rect = canvas.getBoundingClientRect();
    canvas.width = rect.width * window.devicePixelRatio;
    canvas.height = rect.height * window.devicePixelRatio;
    ctx.scale(window.devicePixelRatio, window.devicePixelRatio);
  }
  
  function loadTrack(index) {
    const track = queueItems[index];
    const title = track.dataset.title;
    const artist = track.dataset.artist;
    const trackDuration = track.dataset.duration;
    
    trackTitle.textContent = title;
    trackArtist.textContent = artist;
    totalTimeEl.textContent = trackDuration;
    
    // Actualizar estado activo
    queueItems.forEach(item => item.classList.remove('active'));
    track.classList.add('active');
    
    // Parsear duración
    const [mins, secs] = trackDuration.split(':').map(Number);
    duration = mins * 60 + secs;
    currentTime = 0;
    
    updateProgress();
  }
  
  function togglePlay() {
    isPlaying = !isPlaying;
    
    if (isPlaying) {
      playIcon.style.display = 'none';
      pauseIcon.style.display = 'block';
      player.classList.add('playing');
      startVisualizer();
      simulateProgress();
    } else {
      playIcon.style.display = 'block';
      pauseIcon.style.display = 'none';
      player.classList.remove('playing');
      stopVisualizer();
    }
  }
  
  function nextTrack() {
    if (isShuffled) {
      currentTrackIndex = Math.floor(Math.random() * queueItems.length);
    } else {
      currentTrackIndex = (currentTrackIndex + 1) % queueItems.length;
    }
    loadTrack(currentTrackIndex);
    if (isPlaying) {
      simulateProgress();
    }
  }
  
  function prevTrack() {
    if (currentTime > 3) {
      currentTime = 0;
      updateProgress();
      return;
    }
    
    currentTrackIndex = (currentTrackIndex - 1 + queueItems.length) % queueItems.length;
    loadTrack(currentTrackIndex);
    if (isPlaying) {
      simulateProgress();
    }
  }
  
  function formatTime(seconds) {
    const mins = Math.floor(seconds / 60);
    const secs = Math.floor(seconds % 60);
    return `${mins}:${secs.toString().padStart(2, '0')}`;
  }
  
  function updateProgress() {
    const progress = (currentTime / duration) * 100;
    progressThumb.style.left = `${progress}%`;
    currentTimeEl.textContent = formatTime(currentTime);
    
    // Actualizar progreso de forma de onda
    const pathLength = 400 * (progress / 100);
    waveformProgress.style.strokeDasharray = `${pathLength} 400`;
  }
  
  function simulateProgress() {
    if (!isPlaying) return;
    
    const interval = setInterval(() => {
      if (!isPlaying) {
        clearInterval(interval);
        return;
      }
      
      currentTime += 1;
      updateProgress();
      
      if (currentTime >= duration) {
        clearInterval(interval);
        
        if (repeatMode === 2) {
          currentTime = 0;
          simulateProgress();
        } else if (repeatMode === 1 || currentTrackIndex < queueItems.length - 1) {
          nextTrack();
        } else {
          isPlaying = false;
          playIcon.style.display = 'block';
          pauseIcon.style.display = 'none';
          player.classList.remove('playing');
          stopVisualizer();
        }
      }
    }, 1000);
  }
  
  function createParticles() {
    for (let i = 0; i < 20; i++) {
      setTimeout(() => {
        if (isPlaying) {
          const particle = document.createElement('div');
          particle.className = 'particle';
          particle.style.left = Math.random() * 100 + '%';
          particle.style.animationDuration = (Math.random() * 3 + 2) + 's';
          particle.style.animationDelay = Math.random() * 2 + 's';
          particlesContainer.appendChild(particle);
          
          setTimeout(() => {
            if (particle.parentNode) {
              particle.parentNode.removeChild(particle);
            }
          }, 6000);
        }
      }, i * 200);
    }
    
    if (isPlaying) {
      setTimeout(createParticles, 4000);
    }
  }
  
  function startVisualizer() {
    function animate() {
      if (!isPlaying) return;
      
      const rect = canvas.getBoundingClientRect();
      ctx.clearRect(0, 0, rect.width, rect.height);
      
      // Dibujar visualización de frecuencia
      const barWidth = rect.width / 64;
      for (let i = 0; i < 64; i++) {
        const barHeight = Math.random() * rect.height * 0.8;
        const hue = (i * 5 + Date.now() * 0.01) % 360;
        
        ctx.fillStyle = `hsla(${hue}, 70%, 60%, 0.8)`;
        ctx.fillRect(i * barWidth, rect.height - barHeight, barWidth - 1, barHeight);
      }
      
      // Dibujar visualizador circular
      const centerX = rect.width / 2;
      const centerY = rect.height / 2;
      const radius = Math.min(rect.width, rect.height) * 0.3;
      
      ctx.strokeStyle = 'rgba(0, 245, 255, 0.6)';
      ctx.lineWidth = 2;
      ctx.beginPath();
      
      for (let i = 0; i < 360; i += 5) {
        const angle = (i * Math.PI) / 180;
        const amplitude = Math.random() * 30 + 10;
        const x = centerX + Math.cos(angle) * (radius + amplitude);
        const y = centerY + Math.sin(angle) * (radius + amplitude);
        
        if (i === 0) {
          ctx.moveTo(x, y);
        } else {
          ctx.lineTo(x, y);
        }
      }
      
      ctx.closePath();
      ctx.stroke();
      
      animationId = requestAnimationFrame(animate);
    }
    
    animate();
    createParticles();
  }
  
  function stopVisualizer() {
    if (animationId) {
      cancelAnimationFrame(animationId);
    }
  }
  
  // Eventos
  playBtn.addEventListener('click', togglePlay);
  nextBtn.addEventListener('click', nextTrack);
  prevBtn.addEventListener('click', prevTrack);
  
  shuffleBtn.addEventListener('click', () => {
    isShuffled = !isShuffled;
    shuffleBtn.classList.toggle('active', isShuffled);
  });
  
  repeatBtn.addEventListener('click', () => {
    repeatMode = (repeatMode + 1) % 3;
    repeatBtn.classList.toggle('active', repeatMode > 0);
  });
  
  eqBtn.addEventListener('click', () => {
    eqBtn.classList.toggle('active');
  });
  
  // Control de volumen
  volumeRange.addEventListener('input', () => {
    const volume = volumeRange.value;
    document.querySelector('.volume-fill').style.width = volume + '%';
  });
  
  // Interacción con cola
  queueItems.forEach((item, index) => {
    item.addEventListener('click', () => {
      currentTrackIndex = index;
      loadTrack(currentTrackIndex);
      if (!isPlaying) {
        togglePlay();
      }
    });
  });
  
  // Atajos de teclado
  document.addEventListener('keydown', (e) => {
    if (e.target.tagName === 'INPUT') return;
    
    switch(e.code) {
      case 'Space':
        e.preventDefault();
        togglePlay();
        break;
      case 'ArrowRight':
        nextTrack();
        break;
      case 'ArrowLeft':
        prevTrack();
        break;
    }
  });
  
  // Manejador de redimensionamiento
  window.addEventListener('resize', setupCanvas);
  
  // Inicializar volumen
  document.querySelector('.volume-fill').style.width = '80%';
});