/* Lazy Loading Styles */
.lazy-image {
  opacity: 0;
  transition: opacity 0.3s ease-in-out;
  background-color: #f5f5f5;
  background-image: linear-gradient(90deg, #f5f5f5 25%, #e0e0e0 50%, #f5f5f5 75%);
  background-size: 200% 100%;
  animation: loading-shimmer 1.5s infinite;
}

.lazy-loading {
  opacity: 0.5;
}

.lazy-loaded {
  opacity: 1;
  background: none;
  animation: none;
}

/* Shimmer effect para loading */
@keyframes loading-shimmer {
  0% {
    background-position: -200% 0;
  }
  100% {
    background-position: 200% 0;
  }
}

/* Blur-up effect para imagens */
.lazy-image.blur-up {
  filter: blur(5px);
  transform: scale(1.05);
  transition: filter 0.3s ease-in-out, transform 0.3s ease-in-out, opacity 0.3s ease-in-out;
}

.lazy-image.blur-up.lazy-loaded {
  filter: blur(0);
  transform: scale(1);
}

/* Fade-in effect para imagens críticas */
.critical-image {
  opacity: 0;
  animation: fadeIn 0.5s ease-in-out forwards;
}

@keyframes fadeIn {
  to {
    opacity: 1;
  }
}

/* Placeholder para imagens não carregadas */
.lazy-image::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
  background-size: 200% 100%;
  animation: loading-shimmer 1.5s infinite;
  z-index: 1;
}

.lazy-loaded::before {
  display: none;
}

/* Otimizações para diferentes tamanhos de tela */
@media (max-width: 768px) {
  .lazy-image {
    transition: opacity 0.2s ease-in-out;
  }
}

/* Reduz motion para usuários que preferem menos animação */
@media (prefers-reduced-motion: reduce) {
  .lazy-image {
    transition: none;
    animation: none;
  }
  
  .lazy-image::before {
    animation: none;
  }
}

/* Estilos para vídeos lazy */
video[preload="none"] {
  background-color: #000;
  background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="100" height="100" viewBox="0 0 100 100"><rect width="100" height="100" fill="%23000"/><polygon points="40,30 70,50 40,70" fill="%23fff"/></svg>');
  background-repeat: no-repeat;
  background-position: center;
  background-size: 50px 50px;
}