/**
 * Skeleton Loading States
 * =======================
 * Shimmer animations and loading placeholders for panels and content.
 * Uses CSS custom properties for theming consistency.
 */

/* ============================================================================
   Base Skeleton Styles
   ============================================================================ */

.skeleton-container {
  padding: 1rem;
  animation: skeleton-fade-in 0.2s ease-out;
}

@keyframes skeleton-fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* Base skeleton element with shimmer */
.skeleton-line,
.skeleton-title,
.skeleton-avatar,
.skeleton-icon,
.skeleton-badge,
.skeleton-button,
.skeleton-stat-box,
.skeleton-ability-score,
.skeleton-grid-item,
.skeleton-card-image,
.skeleton-checkbox,
.skeleton-initiative-order,
.skeleton-initiative-hp {
  background: linear-gradient(
    90deg,
    var(--bg-secondary, #1a1a2e) 25%,
    var(--bg-tertiary, #252540) 50%,
    var(--bg-secondary, #1a1a2e) 75%
  );
  background-size: 200% 100%;
  animation: skeleton-shimmer 1.5s ease-in-out infinite;
  border-radius: 4px;
}

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

/* Respect reduced motion preference */
@media (prefers-reduced-motion: reduce) {
  .skeleton-line,
  .skeleton-title,
  .skeleton-avatar,
  .skeleton-icon,
  .skeleton-badge,
  .skeleton-button,
  .skeleton-stat-box,
  .skeleton-ability-score,
  .skeleton-grid-item,
  .skeleton-card-image,
  .skeleton-checkbox,
  .skeleton-initiative-order,
  .skeleton-initiative-hp {
    animation: none;
    background: var(--bg-secondary, #1a1a2e);
  }
}

/* ============================================================================
   Skeleton Line Variants
   ============================================================================ */

.skeleton-line {
  height: 0.875rem;
  margin-bottom: 0.625rem;
}

.skeleton-line:last-child {
  margin-bottom: 0;
}

.skeleton-line--title {
  height: 1.25rem;
  width: 60%;
  margin-bottom: 0.75rem;
}

.skeleton-line--name {
  height: 1.5rem;
  width: 70%;
}

.skeleton-line--subtitle {
  height: 0.75rem;
  width: 50%;
  margin-top: 0.5rem;
}

.skeleton-line--meta {
  height: 0.625rem;
  width: 40%;
}

/* ============================================================================
   Panel Skeleton
   ============================================================================ */

.skeleton-header {
  margin-bottom: 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border-color, #333);
}

.skeleton-title {
  height: 1.25rem;
  width: 40%;
}

.skeleton-content {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.skeleton-actions {
  display: flex;
  gap: 0.75rem;
  margin-top: 1rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border-color, #333);
}

.skeleton-button {
  height: 2rem;
  width: 5rem;
  border-radius: 4px;
}

.skeleton-button--small {
  width: 3.5rem;
}

/* ============================================================================
   Character Stats Skeleton
   ============================================================================ */

.skeleton-stats-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.skeleton-avatar {
  width: 4rem;
  height: 4rem;
  border-radius: 8px;
  flex-shrink: 0;
}

.skeleton-name-block {
  flex: 1;
}

.skeleton-vitals {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.skeleton-stat-box {
  flex: 1;
  height: 3rem;
  border-radius: 6px;
}

.skeleton-abilities {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.5rem;
}

.skeleton-ability-score {
  height: 3.5rem;
  border-radius: 6px;
}

/* ============================================================================
   List Skeleton
   ============================================================================ */

.skeleton-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.skeleton-list-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.5rem;
  border-radius: 6px;
  background: var(--bg-secondary, #1a1a2e);
}

.skeleton-icon {
  width: 2rem;
  height: 2rem;
  border-radius: 4px;
  flex-shrink: 0;
}

.skeleton-list-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

/* ============================================================================
   Card Skeleton
   ============================================================================ */

.skeleton-card {
  border-radius: 8px;
  overflow: hidden;
  background: var(--bg-secondary, #1a1a2e);
}

.skeleton-card-image {
  height: 8rem;
  border-radius: 0;
}

.skeleton-card-content {
  padding: 1rem;
}

/* ============================================================================
   Combat Tracker Skeleton
   ============================================================================ */

.skeleton-combat-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.skeleton-badge {
  width: 4rem;
  height: 1.5rem;
  border-radius: 9999px;
}

.skeleton-initiative-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.skeleton-initiative-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.5rem 0.75rem;
  background: var(--bg-secondary, #1a1a2e);
  border-radius: 6px;
}

.skeleton-initiative-order {
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  flex-shrink: 0;
}

.skeleton-initiative-name {
  flex: 1;
  height: 1rem;
  background: linear-gradient(
    90deg,
    var(--bg-tertiary, #252540) 25%,
    var(--bg-secondary, #1a1a2e) 50%,
    var(--bg-tertiary, #252540) 75%
  );
  background-size: 200% 100%;
  animation: skeleton-shimmer 1.5s ease-in-out infinite;
  border-radius: 4px;
}

.skeleton-initiative-hp {
  width: 3rem;
  height: 1.5rem;
  flex-shrink: 0;
}

.skeleton-combat-actions {
  display: flex;
  gap: 0.5rem;
  justify-content: center;
}

/* ============================================================================
   Tooltip Skeleton
   ============================================================================ */

.skeleton-tooltip {
  padding: 0.75rem;
  min-width: 12rem;
}

.skeleton-tooltip-meta {
  display: flex;
  gap: 0.5rem;
  margin: 0.5rem 0;
}

/* ============================================================================
   Narrative Skeleton
   ============================================================================ */

.skeleton-narrative {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.skeleton-message {
  padding: 0.75rem 1rem;
  border-radius: 8px;
  background: var(--bg-secondary, #1a1a2e);
}

.skeleton-message--dm {
  margin-right: 2rem;
  border-left: 3px solid var(--accent-color, #8b5cf6);
}

.skeleton-message--player {
  margin-left: 2rem;
  text-align: right;
}

.skeleton-message--player .skeleton-line {
  margin-left: auto;
}

/* ============================================================================
   Grid Skeleton
   ============================================================================ */

.skeleton-grid {
  display: grid;
  grid-template-columns: repeat(var(--skeleton-columns, 3), 1fr);
  gap: 0.75rem;
}

.skeleton-grid-item {
  aspect-ratio: 1;
  border-radius: 6px;
}

/* ============================================================================
   Quest Log Skeleton
   ============================================================================ */

.skeleton-quest-log {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.skeleton-quest {
  padding: 1rem;
  background: var(--bg-secondary, #1a1a2e);
  border-radius: 8px;
  border-left: 3px solid var(--accent-color, #8b5cf6);
}

.skeleton-quest--secondary {
  opacity: 0.6;
  border-left-color: var(--text-muted, #666);
}

.skeleton-quest-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.75rem;
}

.skeleton-quest-objectives {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding-left: 0.5rem;
}

.skeleton-objective {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.skeleton-checkbox {
  width: 1rem;
  height: 1rem;
  border-radius: 3px;
  flex-shrink: 0;
}

/* ============================================================================
   Loading State Utility
   ============================================================================ */

.is-loading {
  position: relative;
  pointer-events: none;
}

.is-loading::after {
  content: '';
  position: absolute;
  inset: 0;
  background: transparent;
}