Control Deslizante de Comparación de Imágenes Animado

.comparison-container {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  padding: 40px 20px;
  border-radius: 20px;
  max-width: 700px;
  margin: 0 auto;
}

.comparison-demo {
  background: white;
  border-radius: 15px;
  padding: 30px;
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.2);
}

.comparison-header {
  text-align: center;
  margin-bottom: 30px;
}

.comparison-header h2 {
  margin: 0 0 10px 0;
  color: #333;
  font-size: 2rem;
  font-weight: 700;
}

.comparison-header p {
  color: #666;
  font-size: 1.1rem;
  margin: 0;
}

.image-comparison {
  position: relative;
  width: 100%;
  max-width: 600px;
  margin: 0 auto;
}

.image-container {
  position: relative;
  width: 100%;
  height: 400px;
  overflow: hidden;
  border-radius: 12px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
}

.before-image,
.after-image {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.before-image {
  clip-path: inset(0 50% 0 0);
  z-index: 2;
}

.after-image {
  z-index: 1;
}

.slider-handle {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 100%;
  background: white;
  cursor: ew-resize;
  z-index: 3;
  display: flex;
  align-items: center;
  justify-content: center;
}

.handle-line {
  position: absolute;
  width: 100%;
  height: 100%;
  background: white;
}

.handle-label {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) rotate(90deg);
  background: rgba(102, 126, 234, 0.9);
  color: white;
  padding: 8px 12px;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
  white-space: nowrap;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.slider-handle::before,
.slider-handle::after {
  content: '';
  position: absolute;
  width: 40px;
  height: 40px;
  background: white;
  border-radius: 50%;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
  z-index: -1;
}

.slider-handle::before {
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
}

.slider-handle::after {
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
}

.comparison-labels {
  display: flex;
  justify-content: space-between;
  margin-top: 20px;
  padding: 0 20px;
}

.label {
  font-weight: 600;
  color: #333;
  font-size: 1.2rem;
  padding: 8px 16px;
  border-radius: 25px;
  background: rgba(255, 255, 255, 0.9);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.before-label {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
}

/* Animaciones */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.image-container {
  animation: fadeIn 0.6s ease-out;
}

.comparison-labels {
  animation: fadeIn 0.6s ease-out 0.3s both;
}

/* Responsivo */
@media (max-width: 768px) {
  .comparison-container {
    padding: 30px 15px;
  }
  
  .comparison-demo {
    padding: 20px;
  }
  
  .comparison-header h2 {
    font-size: 1.7rem;
  }
  
  .image-container {
    height: 300px;
  }
  
  .handle-label {
    font-size: 0.7rem;
    padding: 6px 10px;
  }
  
  .label {
    font-size: 1rem;
    padding: 6px 12px;
  }
}

@media (max-width: 480px) {
  .image-container {
    height: 250px;
  }
  
  .comparison-labels {
    padding: 0 10px;
  }
  
  .label {
    font-size: 0.9rem;
  }
}

document.addEventListener('DOMContentLoaded', function() {
  // Obtener elementos del DOM
  const imageComparison = document.getElementById('imageComparison');
  const sliderHandle = document.getElementById('sliderHandle');
  const beforeImage = document.querySelector('.before-image');
  const imageContainer = document.querySelector('.image-container');
  
  let isDragging = false;
  
  // Inicializar posición del control deslizante
  function initSlider() {
    const containerWidth = imageContainer.offsetWidth;
    const initialPosition = containerWidth / 2;
    updateSliderPosition(initialPosition);
  }
  
  // Actualizar posición del control deslizante
  function updateSliderPosition(position) {
    const containerWidth = imageContainer.offsetWidth;
    const percentage = (position / containerWidth) * 100;
    
    // Limitar posición entre 0 y el ancho del contenedor
    const clampedPosition = Math.max(0, Math.min(position, containerWidth));
    const clampedPercentage = Math.max(0, Math.min(percentage, 100));
    
    // Actualizar posición del control deslizante
    sliderHandle.style.left = `${clampedPercentage}%`;
    
    // Actualizar recorte de imagen anterior
    beforeImage.style.clipPath = `inset(0 ${100 - clampedPercentage}% 0 0)`;
  }
  
  // Eventos del mouse
  sliderHandle.addEventListener('mousedown', function(e) {
    isDragging = true;
    e.preventDefault();
  });
  
  document.addEventListener('mousemove', function(e) {
    if (!isDragging) return;
    
    const containerRect = imageContainer.getBoundingClientRect();
    const position = e.clientX - containerRect.left;
    
    updateSliderPosition(position);
  });
  
  document.addEventListener('mouseup', function() {
    isDragging = false;
  });
  
  // Eventos táctiles para móviles
  sliderHandle.addEventListener('touchstart', function(e) {
    isDragging = true;
    e.preventDefault();
  });
  
  document.addEventListener('touchmove', function(e) {
    if (!isDragging) return;
    
    const containerRect = imageContainer.getBoundingClientRect();
    const position = e.touches[0].clientX - containerRect.left;
    
    updateSliderPosition(position);
  });
  
  document.addEventListener('touchend', function() {
    isDragging = false;
  });
  
  // Manejar cambio de tamaño de ventana
  window.addEventListener('resize', initSlider);
  
  // Inicializar control deslizante
  initSlider();
});