/**
 * REPUTIFY SKELETON LOADING - App-Wide Standard
 * ==============================================
 * Use these classes for ALL async loading states across the app.
 * Do not create custom skeleton styles - use standard components.
 *
 * Reference: docs/design/DESIGN_SYSTEM.md#loading-states
 * Use cases: docs/standards/SKELETON_LOADER_USE_CASES.md
 */

/* ============================================
   KEYFRAME - Shimmer (required for skeleton)
   ============================================ */

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

@media (prefers-reduced-motion: reduce) {
  .skeleton-line,
  .skeleton-block,
  .skeleton-avatar,
  .skeleton-chart .skeleton-line {
    animation: none !important;
  }
}

/* ============================================
   BASE SKELETON ELEMENT
   ============================================ */

.skeleton-line {
  height: 16px;
  background: linear-gradient(
    90deg,
    var(--border-primary, #e2e8f0) 25%,
    var(--bg-secondary) 50%,
    var(--border-primary, #e2e8f0) 75%
  );
  background-size: 200% 100%;
  border-radius: 4px;
  margin-bottom: var(--spacing-2, 8px);
  animation: skeleton-shimmer 1.5s ease-in-out infinite;
}

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

/* Skeleton line variants */
.skeleton-line.skeleton-title {
  height: 24px;
  width: 60%;
  margin-bottom: var(--spacing-3, 12px);
}

.skeleton-line.skeleton-subtitle {
  height: 14px;
  width: 40%;
  margin-bottom: var(--spacing-4, 16px);
}

.skeleton-line.skeleton-line-short {
  width: 70%;
}

/* ============================================
   SKELETON BLOCK (for charts, images)
   ============================================ */

.skeleton-block {
  background: linear-gradient(
    90deg,
    var(--border-primary, #e2e8f0) 25%,
    var(--bg-secondary) 50%,
    var(--border-primary, #e2e8f0) 75%
  );
  background-size: 200% 100%;
  border-radius: 8px;
  animation: skeleton-shimmer 1.5s ease-in-out infinite;
}

/* ============================================
   SKELETON CARD
   ============================================ */

.skeleton-card {
  background: var(--bg-secondary);
  border-radius: 12px;
  border: 1px solid var(--border-primary);
  padding: var(--spacing-6, 24px);
}

.skeleton-card .skeleton-header {
  margin-bottom: var(--spacing-4, 16px);
}

.skeleton-card .skeleton-body {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2, 8px);
}

/* ============================================
   SKELETON CHART (for chart placeholders)
   ============================================ */

.skeleton-chart {
  flex: 1;
  min-height: 200px;
  height: 100%;
  padding: 20px;
  display: flex;
  flex-direction: column;
  justify-content: space-around;
  gap: 16px;
}

.skeleton-chart .skeleton-line {
  height: 50px;
  margin-bottom: 0;
  background: linear-gradient(
    90deg,
    var(--border-primary, #e2e8f0) 25%,
    var(--bg-secondary) 50%,
    var(--border-primary, #e2e8f0) 75%
  );
  background-size: 200% 100%;
  border-radius: 8px;
  animation: skeleton-shimmer 1.5s ease-in-out infinite;
}

/* ============================================
   SKELETON AVATAR
   ============================================ */

.skeleton-avatar {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full, 50%);
  background: linear-gradient(
    90deg,
    var(--border-primary, #e2e8f0) 25%,
    var(--bg-secondary) 50%,
    var(--border-primary, #e2e8f0) 75%
  );
  background-size: 200% 100%;
  animation: skeleton-shimmer 1.5s ease-in-out infinite;
}

/* ============================================
   DARK MODE
   ============================================ */

[data-theme="dark"] .skeleton-line,
[data-theme="dark"] .skeleton-block,
[data-theme="dark"] .skeleton-avatar,
[data-theme="dark"] .skeleton-chart .skeleton-line {
  background: linear-gradient(
    90deg,
    var(--bg-tertiary) 25%,
    var(--bg-hover) 50%,
    var(--bg-tertiary) 75%
  );
  background-size: 200% 100%;
}

[data-theme="dark"] .skeleton-card {
  background: var(--bg-secondary);
  border-color: var(--border-primary);
}