/**
 * Shimmer/Loading System CSS
 * Unified loading states for services and playlists
 */

/* Core shimmer animation */
@keyframes shimmer {
  0% {
    transform: translateX(-100%);
  }
  100% {
    transform: translateX(100%);
  }
}

/* Core shimmer class - apply to any element */
.shimmer {
  border-radius: var(--border-radius-small);
  overflow: hidden;
  position: relative;
  background-color: var(--skeleton-color);
}

.shimmer::before {
  animation: shimmer var(--shimmer-duration) infinite;
  background: linear-gradient(
    90deg,
    var(--skeleton-color) 0%,
    rgba(255, 255, 255, var(--shimmer-opacity)) 50%,
    var(--skeleton-color) 100%
  );
  content: "";
  height: 100%;
  left: -100%;
  position: absolute;
  top: 0;
  width: 100%;
  z-index: 1;
}

/* Loading overlay utilities */
.loading-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--container-background);
  z-index: 10;
  display: none;
}

.loading-overlay.active {
  display: block;
}

.loading-overlay.flex {
  display: flex;
}

.loading-overlay.flex.active {
  display: flex;
}

/* Service-specific shimmer components */
.loading-overlay-service {
  flex-direction: column;
  align-items: center;
  padding: 0;
}

.shimmer-service-image {
  width: 100%;
  padding-bottom: 100%;
  margin-bottom: 0;
}

.shimmer-service-text {
  width: 100%;
  margin-top: var(--space-md);
  text-align: left;
  align-self: flex-start;
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

/* Playlist-specific shimmer components */
.loading-overlay-playlist {
  padding: var(--space-xl);
  flex-direction: column;
  gap: var(--space-lg);
}

.loading-overlay-playlist.active {
  display: flex;
}

/* Override playlist overflow when shimmer is active */
.playlist.main-playlist:has(.loading-overlay-playlist.active) {
  overflow-y: hidden;
  height: auto;
  min-height: 90vh;
  max-height: 95vh;
}

/* Table-only shimmer styling */
.loading-overlay-table {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  min-height: 100vh;
  background-color: var(--container-background);
  z-index: 5;
  display: none;
  flex-direction: column;
  justify-content: flex-start;
  padding: 0;
}

.loading-overlay-table.active {
  display: flex;
}

/* Ensure table container can accommodate full shimmer */
.playlist-table:has(.loading-overlay-table.active) {
  min-height: 80vh;
  overflow: visible;
}

/* Playlist header shimmer */
.playlist-header-shimmer {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.playlist-title-shimmer {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.shimmer-playlist-logo {
  width: var(--size-icon-sm);
  height: var(--size-icon-sm);
  border-radius: var(--border-radius-small);
}

.shimmer-playlist-title {
  width: var(--shimmer-playlist-title-width);
  height: var(--space-lg);
}

.shimmer-playlist-desc {
  width: var(--shimmer-playlist-desc-width);
  height: var(--space-lg);
}

/* Controls shimmer */
.playlist-controls-shimmer {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.control-group-shimmer {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.shimmer-control-label {
  width: var(--shimmer-control-label-width);
  height: var(--space-lg);
}

.shimmer-buttons-row {
  display: flex;
  gap: var(--space-lg);
}

.shimmer-button {
  width: var(--shimmer-button-width);
  height: var(--shimmer-button-height);
  border-radius: calc(var(--space-xl) + var(--space-xs));
}

/* Table shimmer */
.shimmer-table-container {
  flex: 1;
  overflow: hidden;
}

.playlist-table-shimmer {
  margin: var(--space-lg) 0;
}

.playlist-shimmer-row {
  height: var(--size-row-md);
}

.playlist-shimmer-row:not(:last-child) {
  margin-bottom: var(--space-xs);
}

.playlist-shimmer-row td {
  padding: var(--space-xs);
  vertical-align: middle;
  border-bottom: 1px solid var(--container-background);
}

.playlist-shimmer-row td.rank {
  text-align: center;
  width: 1%;
  padding: 0;
}

.playlist-shimmer-row td.cover {
  text-align: center;
  width: 0%;
}

.playlist-shimmer-row td.info {
  width: 1%;
  white-space: nowrap;
}

.playlist-shimmer-row td.spacer {
  width: 100%;
}

.playlist-shimmer-row td.total-play-count,
.playlist-shimmer-row td.trending {
  width: 10%;
  text-align: left;
}

.playlist-shimmer-row td.seen-on {
  width: 1%;
  text-align: right;
  white-space: nowrap;
}

.playlist-shimmer-row td.external {
  width: 1%;
  text-align: center;
  white-space: nowrap;
}

/* Responsive adjustments */
@media screen and (max-width: 768px) {
  .loading-overlay-service {
    padding: 0;
  }

  .loading-overlay-playlist {
    padding: var(--space-md);
  }

  .playlist-shimmer-row {
    height: var(--size-row-sm);
  }

  .shimmer-button {
    width: var(--shimmer-button-width-mobile);
    height: var(--shimmer-button-height-mobile);
  }

  .shimmer-playlist-desc {
    width: var(--shimmer-playlist-desc-width-mobile);
  }
}