/**
 * Skeleton Loader Styles
 * Reskinned: Traxium dark theme
 */

:root {
  --trx-panel:     var(--tx-color-navy-canvas);
  --trx-panel-2:   var(--tx-color-navy-surface);
  --trx-border:    rgba(255,255,255,0.07);
}

/* ===================================
   SKELETON LOADING CONTAINER
   =================================== */

.loading-skeleton {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: var(--spacing-xl, 1.5rem);
  animation: fadeIn 0.3s ease-out;
}

.loading-skeleton.hidden {
  display: none;
}

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

.skeleton-card {
  background: var(--trx-panel);
  border-radius: var(--radius-xl, 1rem);
  padding: var(--spacing-xl, 1.5rem);
  box-shadow: 0 4px 28px rgba(0,0,0,0.45), 0 1px 4px rgba(0,0,0,0.3);
  border: 1px solid var(--trx-border);
  animation: fadeIn 0.5s ease-out;
}

.skeleton-card:nth-child(1) { animation-delay: 0s; }
.skeleton-card:nth-child(2) { animation-delay: 0.1s; }
.skeleton-card:nth-child(3) { animation-delay: 0.2s; }

/* ===================================
   SKELETON ELEMENTS
   =================================== */

.skeleton-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: var(--spacing-lg, 1.5rem);
  padding-bottom: var(--spacing-lg, 1.5rem);
  border-bottom: 1px solid var(--trx-border);
}

.skeleton-line {
  background: linear-gradient(
    90deg,
    var(--tx-color-navy-canvas) 0%,
    var(--tx-color-navy-surface) 50%,
    var(--tx-color-navy-canvas) 100%
  );
  background-size: 200% 100%;
  border-radius: var(--radius-md, 0.5rem);
  animation: shimmer 1.5s ease-in-out infinite;
}

.skeleton-title {
  width: 140px;
  height: 24px;
  margin-bottom: var(--spacing-sm, 0.5rem);
}

.skeleton-subtitle {
  width: 180px;
  height: 16px;
}

.skeleton-badge {
  width: 100px;
  height: 28px;
  background: linear-gradient(
    90deg,
    var(--tx-color-navy-canvas) 0%,
    var(--tx-color-navy-surface) 50%,
    var(--tx-color-navy-canvas) 100%
  );
  background-size: 200% 100%;
  border-radius: var(--radius-full, 9999px);
  animation: shimmer 1.5s ease-in-out infinite;
}

/* ===================================
   SKELETON DETAILS
   =================================== */

.skeleton-details {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md, 1rem);
  margin-bottom: var(--spacing-xl, 1.5rem);
}

.skeleton-text {
  width: 100%;
  height: 16px;
}

.skeleton-text:nth-child(1) { width: 85%; }
.skeleton-text:nth-child(2) { width: 70%; }
.skeleton-text:nth-child(3) { width: 90%; }

/* ===================================
   SKELETON TIMELINE
   =================================== */

.skeleton-timeline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: var(--spacing-xl, 1.5rem);
  padding-top: var(--spacing-lg, 1.5rem);
  border-top: 1px solid var(--trx-border);
}

.skeleton-dot {
  width: 12px;
  height: 12px;
  background: linear-gradient(
    90deg,
    var(--tx-color-navy-canvas) 0%,
    var(--tx-color-navy-surface) 50%,
    var(--tx-color-navy-canvas) 100%
  );
  background-size: 200% 100%;
  border-radius: 50%;
  animation: shimmer 1.5s ease-in-out infinite;
}

.skeleton-line-horizontal {
  flex: 1;
  height: 2px;
  background: linear-gradient(
    90deg,
    var(--tx-color-navy-canvas) 0%,
    var(--tx-color-navy-surface) 50%,
    var(--tx-color-navy-canvas) 100%
  );
  background-size: 200% 100%;
  margin: 0 var(--spacing-sm, 0.5rem);
  animation: shimmer 1.5s ease-in-out infinite;
}

/* ===================================
   SHIMMER ANIMATION
   =================================== */

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

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ===================================
   FADE OUT ANIMATION
   =================================== */

.loading-skeleton.fade-out {
  animation: fadeOut 0.3s ease-out forwards;
}

@keyframes fadeOut {
  from { opacity: 1; transform: translateY(0); }
  to   { opacity: 0; transform: translateY(-10px); }
}

/* ===================================
   RESPONSIVE DESIGN
   =================================== */

@media (max-width: 768px) {
  .loading-skeleton { grid-template-columns: 1fr; }
  .skeleton-timeline { flex-wrap: wrap; gap: var(--spacing-sm, 0.5rem); }
  .skeleton-line-horizontal { display: none; }
}

/* ===================================
   ACCESSIBILITY
   =================================== */

@media (prefers-reduced-motion: reduce) {
  .skeleton-line,
  .skeleton-badge,
  .skeleton-dot,
  .skeleton-line-horizontal {
    animation: none;
    background: var(--tx-color-navy-surface);
  }

  .loading-skeleton,
  .skeleton-card {
    animation: none;
  }
}