/**
 * React Power Table - Loading State Styles
 * CSS animations and states for loading indicators
 */

/* Spinner animation */
@keyframes rpt-spin {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

/* Pulse animation for skeletons */
@keyframes rpt-pulse {
  0%, 100% {
    opacity: 0.5;
  }
  50% {
    opacity: 0.8;
  }
}

/* Fade in animation */
@keyframes rpt-fade-in {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

/* Slide up animation for batch actions bar */
@keyframes rpt-slide-up {
  from {
    opacity: 0;
    transform: translate(-50%, 20px);
  }
  to {
    opacity: 1;
    transform: translate(-50%, 0);
  }
}

/* Base loading container */
.rpt-loading-container {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
}

/* Loading overlay */
.rpt-loading-overlay {
  position: relative;
  width: 100%;
  height: 100%;
  min-height: inherit;
}

/* Loading overlay background with improved performance */
.rpt-loading-overlay-background {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(255, 255, 255, var(--backdrop-opacity, 0.6));
  z-index: 1;
  border-radius: inherit;
  backdrop-filter: blur(1px);
  will-change: opacity; /* Performance hint for browsers */
  transition: opacity 0.2s ease;
}

.dark .rpt-loading-overlay-background {
  background-color: rgba(15, 23, 42, var(--backdrop-opacity, 0.6));
}

/* Loading indicator positioned in center */
.rpt-loading-indicator {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Loading blur effect with reduced GPU impact */
.rpt-loading-blur > *:not(.rpt-loading-overlay-background):not(.rpt-loading-indicator) {
  filter: blur(2px);
  will-change: filter; /* Performance hint for browsers */
  transition: filter 0.2s ease;
}

/* Loading disabled state */
.rpt-loading-disabled {
  pointer-events: none !important;
  user-select: none !important;
}

/* Loading fade effect */
.rpt-loading-fade {
  animation: rpt-fade-in 0.2s ease forwards;
}

/* Loading sizes with consistent naming */
.rpt-loading--xs {
  width: 16px;
  height: 16px;
}

.rpt-loading--sm {
  width: 24px;
  height: 24px;
}

.rpt-loading--md {
  width: 32px;
  height: 32px;
}

.rpt-loading--lg {
  width: 40px;
  height: 40px;
}

.rpt-loading--xl {
  width: 48px;
  height: 48px;
}

/* Skeleton loading animation with reduced GPU impact */
.rpt-loading-skeleton {
  width: 100%;
  position: relative;
  overflow: hidden;
  background: var(--rpt-bg-color);
  min-height: 20px;
  border-radius: var(--rpt-border-radius);
}

/* More efficient skeleton animation */
.rpt-loading-skeleton-content {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(
    90deg,
    transparent,
    var(--rpt-skeleton-color, rgba(0, 0, 0, 0.05)),
    transparent
  );
  will-change: transform; /* Performance hint for browsers */
  animation: rpt-loading-skeleton 1.5s ease-in-out infinite;
}

/* Dark mode skeleton colors */
.dark .rpt-loading-skeleton-content {
  background: linear-gradient(
    90deg,
    transparent,
    var(--rpt-skeleton-color, rgba(255, 255, 255, 0.05)),
    transparent
  );
}

@keyframes rpt-loading-skeleton {
  0% {
    transform: translateX(-100%);
  }
  100% {
    transform: translateX(100%);
  }
}

/* Dialog specific loading styles */
.rpt-dialog-loading {
  position: relative;
  width: 100%;
  min-height: 150px;
}

/* Use CSS custom property for opacity */
.rpt-dialog-loading::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(255, 255, 255, var(--backdrop-opacity, 0.6));
  border-radius: var(--rpt-border-radius);
  z-index: 1;
  backdrop-filter: blur(2px);
  transition: all 0.2s ease;
}

.dark .rpt-dialog-loading::before {
  background-color: rgba(15, 23, 42, var(--backdrop-opacity, 0.6));
}

/* Optimized loading indicator positioning */
.rpt-dialog-loading-indicator {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

/* Dialog content with blur effect during loading */
.rpt-dialog-content-blur {
  filter: blur(2px);
  opacity: 0.7;
  pointer-events: none;
  will-change: filter, opacity; /* Performance hint */
  transition: all 0.2s ease;
}

/* Dialog skeleton loading with variable item support */
.rpt-dialog-skeleton {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding: 1rem;
}

/* Consistent skeleton animation */
.rpt-dialog-skeleton-item {
  height: 1rem;
  background: linear-gradient(90deg, 
    rgba(226, 232, 240, 0.6) 25%, 
    rgba(203, 213, 225, 0.6) 37%, 
    rgba(226, 232, 240, 0.6) 63%
  );
  background-size: 400% 100%;
  animation: rpt-dialog-skeleton 1.4s ease infinite;
  border-radius: var(--rpt-border-radius-sm, 4px);
  will-change: background-position; /* Performance hint */
}

.dark .rpt-dialog-skeleton-item {
  background: linear-gradient(90deg, 
    rgba(55, 65, 81, 0.7) 25%, 
    rgba(75, 85, 99, 0.7) 37%, 
    rgba(55, 65, 81, 0.7) 63%
  );
}

/* Other skeleton variations */
.rpt-dialog-skeleton-item.rpt-skeleton-title {
  width: 70%;
  height: 1.5rem;
  margin-bottom: 0.5rem;
}

.rpt-dialog-skeleton-item.rpt-skeleton-input {
  height: 2.5rem;
}

.rpt-dialog-skeleton-item.rpt-skeleton-textarea {
  height: 5rem;
}

@keyframes rpt-dialog-skeleton {
  0% {
    background-position: 100% 50%;
  }
  100% {
    background-position: 0 50%;
  }
}

/* Table specific loading styles */
.rpt-table-loading {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: rgba(255, 255, 255, var(--backdrop-opacity, 0.6));
  z-index: 50;
  border-radius: inherit;
  backdrop-filter: blur(1px);
  will-change: opacity; /* Performance hint */
}

.dark .rpt-table-loading {
  background-color: rgba(15, 23, 42, var(--backdrop-opacity, 0.6));
}

/* Loading indicator containers */
.rpt-table-loading-overlay {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  z-index: 51;
}

.rpt-table-loading-indicator {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}

.rpt-table-loading-text {
  font-size: 0.875rem;
  color: var(--rpt-text-color);
  margin-top: 0.25rem;
}

/* Optimized table loading blur effect */
.rpt-table-loading-blur .rpt-table {
  filter: blur(2px);
  opacity: 0.7;
  pointer-events: none;
  will-change: filter, opacity; /* Performance hint */
  transition: all 0.2s ease;
}

/* Reduced motion support */
.rpt-reduced-motion * {
  animation-duration: 0.001ms !important;
  transition-duration: 0.001ms !important;
}

@media (prefers-reduced-motion: reduce) {
  :root {
    --transition-speed: 0.001ms;
  }
  
  .rpt-spin,
  .rpt-pulse,
  .rpt-fade-in,
  .rpt-slide-up,
  .rpt-loading-skeleton-content,
  .rpt-dialog-skeleton-item {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
  }
  
  .rpt-loading-blur > *,
  .rpt-table-loading-blur .rpt-table,
  .rpt-dialog-content-blur {
    filter: none !important;
    transition: none !important;
  }
}

/* Table skeleton loading */
.rpt-table-skeleton {
  width: 100%;
  overflow: hidden;
  background: var(--rpt-bg-color);
  border-radius: var(--rpt-border-radius);
  box-shadow: var(--rpt-shadow-sm);
}

.rpt-table-skeleton-header {
  display: flex;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--rpt-border-color);
  background-color: var(--rpt-head-bg-color);
}

.rpt-table-skeleton-body {
  display: flex;
  flex-direction: column;
}

.rpt-table-skeleton-row {
  display: flex;
  border-bottom: 1px solid var(--rpt-border-color);
  padding: 0.75rem 1rem;
}

/* Optimized skeleton cells */
.rpt-table-skeleton-cell {
  flex: 1;
  height: 1.5rem;
  margin-right: 1rem;
  background: linear-gradient(90deg, 
    rgba(226, 232, 240, 0.6) 25%, 
    rgba(203, 213, 225, 0.6) 37%, 
    rgba(226, 232, 240, 0.6) 63%
  );
  background-size: 400% 100%;
  animation: rpt-table-skeleton 1.4s ease infinite;
  border-radius: 4px;
  will-change: background-position; /* Performance hint */
}

.dark .rpt-table-skeleton-cell {
  background: linear-gradient(90deg, 
    rgba(55, 65, 81, 0.7) 25%, 
    rgba(75, 85, 99, 0.7) 37%, 
    rgba(55, 65, 81, 0.7) 63%
  );
}

/* Header cells in skeleton */
.rpt-skeleton-header-cell {
  height: 1.75rem;
}