/* Progressive Image Loading Styles */

.progressive-image-wrapper {
  position: relative;
  overflow: hidden;
  background-color: #f0f0f0;
}

.progressive-image-wrapper img {
  display: block;
  width: 100%;
  height: auto;
}

/* Placeholder (small) image - blurred */
.progressive-image-wrapper .img-small {
  filter: blur(20px);
  transform: scale(1.1);
  transition: opacity 0.5s ease-in-out;
}

/* Full resolution image - initially hidden */
.progressive-image-wrapper .img-large {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity 0.5s ease-in-out;
}

/* When large image is loaded */
.progressive-image-wrapper .img-large.loaded {
  opacity: 1;
}

.progressive-image-wrapper .img-small.loaded {
  opacity: 0;
}

/* Hero image specific styles */
.hero-image-container {
  width: 100%;
  max-width: 1200px;
  margin: 2rem auto;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.hero-image-container .progressive-image-wrapper {
  aspect-ratio: 16 / 9;
}

/* Article hero images */
.article-hero {
  width: 100%;
  margin: 2rem 0;
  border-radius: 8px;
  overflow: hidden;
}

.article-hero .progressive-image-wrapper {
  aspect-ratio: 21 / 9;
}

/* Loading spinner */
.progressive-image-wrapper::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 40px;
  height: 40px;
  margin: -20px 0 0 -20px;
  border: 3px solid #f3f3f3;
  border-top: 3px solid #3498db;
  border-radius: 50%;
  animation: spin 1s linear infinite;
  opacity: 0.5;
  z-index: 1;
}

.progressive-image-wrapper.loaded::before {
  display: none;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* Responsive adjustments */
@media (max-width: 768px) {
  .hero-image-container,
  .article-hero {
    margin: 1rem 0;
    border-radius: 4px;
  }
}