/* Virtual Scrolling Core Styles */

.tablix-scroll-container {
  position: relative;
  overflow: auto;
  height: 400px;
  border: var(--tablix-table-border, 1px solid #ddd);
  border-radius: var(--tablix-border-radius, 4px);
}

.tablix-scroll-container .tablix-table {
  width: 100%;
  border-collapse: collapse;
}

.tablix-scroll-container .tablix-thead {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--tablix-header-bg, white);
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.tablix-top-spacer,
.tablix-bottom-spacer {
  height: 0;
  border: none !important;
  padding: 0 !important;
  line-height: 0;
}

.tablix-top-spacer td,
.tablix-bottom-spacer td {
  height: 0 !important;
  padding: 0 !important;
  border: none !important;
  line-height: 0;
}

.tablix-placeholder-row {
  display: none !important;
}

/* Ensure smooth scrolling */
.tablix-scroll-container {
  scroll-behavior: smooth;
}

/* Performance optimizations */
.tablix-scroll-container .tablix-tbody .tablix-row {
  contain: layout style;
  will-change: auto;
}

/* Image loading optimizations */
.tablix-scroll-container img.loading {
  opacity: 0.5;
  transition: opacity 0.2s ease;
}

.tablix-scroll-container img.image-placeholder {
  background-color: var(--tablix-row-even-bg, #f0f0f0);
  border: var(--tablix-cell-border, 1px solid #ddd);
}

/* Smooth image transitions */
.tablix-scroll-container img {
  transition: opacity 0.2s ease;
}

/* Loading state for virtual scroll */
.tablix-virtual-loading {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100px;
  font-style: italic;
  color: var(--tablix-loading-text-color, #666);
}

/* Virtual scroll performance indicators */
.tablix-performance-overlay {
  position: absolute;
  top: 10px;
  right: 10px;
  background: rgba(0,0,0,0.8);
  color: white;
  padding: 8px 12px;
  border-radius: 4px;
  font-size: 0.8rem;
  font-family: monospace;
  z-index: 1000;
  pointer-events: none;
}

/* Responsive virtual scrolling */
@media (max-width: 768px) {
  .tablix-scroll-container {
    height: 300px;
  }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  .tablix-scroll-container {
    border: 2px solid;
  }
  
  .tablix-scroll-container .tablix-thead {
    box-shadow: 0 2px 4px rgba(0,0,0,0.5);
  }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
  .tablix-scroll-container {
    scroll-behavior: auto;
  }
}