/**
 * Skeleton Loading States
 *
 * Reusable skeleton loader components for smooth loading experiences.
 * Provides visual feedback while content loads asynchronously.
 * Uses CSS variables for dark theme compatibility.
 */

/* Base skeleton styles */
.skeleton {
  background: linear-gradient(90deg, var(--bg-tertiary, #1a1a24) 25%, var(--bg-secondary, #12121a) 50%, var(--bg-tertiary, #1a1a24) 75%);
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s ease-in-out infinite;
  border-radius: 4px;
}

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

/* Skeleton variants */
.skeleton--text {
  height: 1rem;
  margin-bottom: 0.5rem;
  border-radius: 3px;
}

.skeleton--text-sm {
  height: 0.75rem;
  margin-bottom: 0.375rem;
}

.skeleton--text-lg {
  height: 1.5rem;
  margin-bottom: 0.75rem;
}

.skeleton--heading {
  height: 2rem;
  margin-bottom: 1rem;
  border-radius: 4px;
}

.skeleton--circle {
  border-radius: 50%;
  width: 3rem;
  height: 3rem;
}

.skeleton--card {
  height: 200px;
  border-radius: 8px;
}

.skeleton--stat {
  height: 120px;
  border-radius: 8px;
}

.skeleton--table-row {
  height: 3rem;
  margin-bottom: 0.5rem;
  border-radius: 4px;
}

.skeleton--button {
  height: 2.5rem;
  width: 100px;
  border-radius: 6px;
}

/* Admin skeleton components */
.skeleton-admin-stat {
  padding: 1.5rem;
  background: var(--bg-card, #151520);
  border-radius: 8px;
  border: 1px solid var(--border-subtle, rgba(255, 255, 255, 0.08));
}

.skeleton-admin-stat__label {
  height: 1rem;
  width: 60%;
  margin-bottom: 1rem;
  background: linear-gradient(90deg, var(--bg-tertiary, #1a1a24) 25%, var(--bg-secondary, #12121a) 50%, var(--bg-tertiary, #1a1a24) 75%);
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s ease-in-out infinite;
  border-radius: 3px;
}

.skeleton-admin-stat__value {
  height: 2.5rem;
  width: 40%;
  background: linear-gradient(90deg, var(--bg-tertiary, #1a1a24) 25%, var(--bg-secondary, #12121a) 50%, var(--bg-tertiary, #1a1a24) 75%);
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s ease-in-out infinite;
  border-radius: 4px;
}

.skeleton-table {
  width: 100%;
}

.skeleton-table__row {
  display: flex;
  gap: 1rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--border-subtle, rgba(255, 255, 255, 0.08));
}

.skeleton-table__cell {
  flex: 1;
  height: 1.5rem;
  background: linear-gradient(90deg, var(--bg-tertiary, #1a1a24) 25%, var(--bg-secondary, #12121a) 50%, var(--bg-tertiary, #1a1a24) 75%);
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s ease-in-out infinite;
  border-radius: 3px;
}

.skeleton-table__cell--narrow {
  flex: 0.5;
}

.skeleton-table__cell--wide {
  flex: 2;
}

/* Alert card skeleton */
.skeleton-alert-card {
  background: var(--bg-card, #151520);
  border: 1px solid var(--border-subtle, rgba(255, 255, 255, 0.08));
  border-radius: 8px;
  padding: 1.5rem;
  margin-bottom: 1rem;
}

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

.skeleton-alert-card__title {
  height: 1.5rem;
  width: 40%;
  background: linear-gradient(90deg, var(--bg-tertiary, #1a1a24) 25%, var(--bg-secondary, #12121a) 50%, var(--bg-tertiary, #1a1a24) 75%);
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s ease-in-out infinite;
  border-radius: 4px;
}

.skeleton-alert-card__badge {
  height: 1.5rem;
  width: 60px;
  background: linear-gradient(90deg, var(--bg-tertiary, #1a1a24) 25%, var(--bg-secondary, #12121a) 50%, var(--bg-tertiary, #1a1a24) 75%);
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s ease-in-out infinite;
  border-radius: 12px;
}

.skeleton-alert-card__body {
  margin-bottom: 1rem;
}

.skeleton-alert-card__text {
  height: 1rem;
  margin-bottom: 0.5rem;
  background: linear-gradient(90deg, var(--bg-tertiary, #1a1a24) 25%, var(--bg-secondary, #12121a) 50%, var(--bg-tertiary, #1a1a24) 75%);
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s ease-in-out infinite;
  border-radius: 3px;
}

.skeleton-alert-card__text:last-child {
  width: 70%;
}

.skeleton-alert-card__footer {
  display: flex;
  gap: 1rem;
}

.skeleton-alert-card__tag {
  height: 1.25rem;
  width: 60px;
  background: linear-gradient(90deg, var(--bg-tertiary, #1a1a24) 25%, var(--bg-secondary, #12121a) 50%, var(--bg-tertiary, #1a1a24) 75%);
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s ease-in-out infinite;
  border-radius: 3px;
}

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

.skeleton-list__item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem;
  background: var(--bg-card, #151520);
  border-radius: 6px;
}

.skeleton-list__icon {
  width: 2.5rem;
  height: 2.5rem;
  background: linear-gradient(90deg, var(--bg-tertiary, #1a1a24) 25%, var(--bg-secondary, #12121a) 50%, var(--bg-tertiary, #1a1a24) 75%);
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s ease-in-out infinite;
  border-radius: 50%;
  flex-shrink: 0;
}

.skeleton-list__content {
  flex: 1;
}

.skeleton-list__title {
  height: 1.25rem;
  width: 60%;
  margin-bottom: 0.5rem;
  background: linear-gradient(90deg, var(--bg-tertiary, #1a1a24) 25%, var(--bg-secondary, #12121a) 50%, var(--bg-tertiary, #1a1a24) 75%);
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s ease-in-out infinite;
  border-radius: 3px;
}

.skeleton-list__subtitle {
  height: 1rem;
  width: 40%;
  background: linear-gradient(90deg, var(--bg-tertiary, #1a1a24) 25%, var(--bg-secondary, #12121a) 50%, var(--bg-tertiary, #1a1a24) 75%);
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s ease-in-out infinite;
  border-radius: 3px;
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
  .skeleton,
  .skeleton-admin-stat__label,
  .skeleton-admin-stat__value,
  .skeleton-table__cell,
  .skeleton-alert-card__title,
  .skeleton-alert-card__badge,
  .skeleton-alert-card__text,
  .skeleton-alert-card__tag,
  .skeleton-list__icon,
  .skeleton-list__title,
  .skeleton-list__subtitle {
    animation: none;
    background: var(--bg-tertiary, #1a1a24);
  }
}

/* Grid layouts for skeletons */
.skeleton-grid {
  display: grid;
  gap: 1rem;
}

.skeleton-grid--2col {
  grid-template-columns: repeat(2, 1fr);
}

.skeleton-grid--3col {
  grid-template-columns: repeat(3, 1fr);
}

.skeleton-grid--4col {
  grid-template-columns: repeat(4, 1fr);
}

@media (max-width: 768px) {
  .skeleton-grid--2col,
  .skeleton-grid--3col,
  .skeleton-grid--4col {
    grid-template-columns: 1fr;
  }
}