/* Loading overlay */
.loading-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(255, 255, 255, 0.9);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  backdrop-filter: blur(2px);
}

body.dark .loading-overlay,
body.theme-dark .loading-overlay {
  background: rgba(0, 0, 0, 0.8);
}

/* Button loading state */
.btn.loading {
  position: relative;
  pointer-events: none;
}

.btn.loading .fa-spinner {
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

/* Skeleton loading states */
.skeleton-card {
  height: 200px;
}

@keyframes shimmer {
  0% {
    background-position: -200% 0;
  }
  100% {
    background-position: 200% 0;
  }
}

/* Pulse loading animation */
@keyframes pulse {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

/* Image optimization and lazy states */
img {
  transition: opacity 0.3s ease;
  max-width: 100%;
  height: auto;
}

img.lazy,
img[data-src] {
  background: var(--color-surface-elevated);
}

img.img-loading {
  opacity: 0.5;
  animation: pulse 1.5s infinite;
}

img.img-loaded {
  opacity: 1;
  animation: fadeIn 0.3s ease;
}

img.img-error {
  opacity: 0.3;
  filter: grayscale(100%);
}

/* @keyframes fadeIn - REMOVED: Duplicate of base.css fadeIn animation */

/* Hide broken image icons */
img.img-error::before,
img.img-error::after {
  display: none !important;
}

/* Logo containers */
.supplier-logo,
.store-logo,
.logo-container {
  transition: opacity 0.3s ease;
}

/* Generic spinner helper */
.spinner {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid rgba(0, 0, 0, 0.1);
  border-top-color: var(--accent-color);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

/* Loading state grouping */
.loading-state {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md);
  color: var(--color-text-secondary);
}

.loading-spinner {
  width: 20px;
  height: 20px;
  border: 2px solid var(--color-border);
  border-top-color: var(--accent-color);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.loading-text {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
}

/* Loading sizes */
.loading-sm .loading-spinner {
  width: 16px;
  height: 16px;
  border-width: 2px;
}

.loading-sm .loading-text {
  font-size: var(--font-size-xs);
}

.loading-lg .loading-spinner {
  width: 32px;
  height: 32px;
  border-width: 3px;
}

.loading-lg .loading-text {
  font-size: var(--font-size-base);
}