/* MusicTree Skeleton Shimmer Loader Component */

/* ========================================
   Loader Container
   ======================================== */
.mt-loader {
  width: 100%;
  padding: 1rem 0;
  animation: fadeIn 0.3s ease-in;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* ========================================
   Shimmer Animation
   ======================================== */
@keyframes shimmer {
  0% {
    background-position: -468px 0;
  }
  100% {
    background-position: 468px 0;
  }
}

.mt-shimmer {
  animation: shimmer 1.4s ease-in-out infinite;
  background: linear-gradient(
    to right,
    var(--skeleton-bg, #e0e0e0) 0%,
    var(--skeleton-highlight, #f0f0f0) 20%,
    var(--skeleton-bg, #e0e0e0) 40%,
    var(--skeleton-bg, #e0e0e0) 100%
  );
  background-size: 800px 104px;
  border-radius: 8px;
}

/* ========================================
   Skeleton Elements
   ======================================== */
.mt-skel {
  display: block;
  height: 16px;
  border-radius: 6px;
  margin-bottom: 0.75rem;
}

.mt-skel--line {
  width: 100%;
  height: 14px;
}

.mt-skel--short {
  width: 60%;
  height: 14px;
}

.mt-skel--title {
  width: 80%;
  height: 20px;
  margin-bottom: 1rem;
}

.mt-skel--pill {
  width: 120px;
  height: 32px;
  border-radius: 16px;
  margin-bottom: 1.5rem;
}

.mt-skel--thumbnail {
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: 12px;
  margin-bottom: 1rem;
}

.mt-skel--square {
  width: 80px;
  height: 80px;
  border-radius: 8px;
  margin-right: 1rem;
}

.mt-skel--circle {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  margin-right: 1rem;
}

/* ========================================
   Card Placeholder
   ======================================== */
.mt-loader-card {
  background: var(--bs-body-bg, #ffffff);
  border: 1px solid var(--bs-border-color, rgba(0,0,0,0.125));
  border-radius: 12px;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

/* Card with thumbnail layout */
.mt-loader-card--media {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}

.mt-loader-card--media .mt-loader-card__content {
  flex: 1;
  min-width: 0;
}

/* Grid layout for multiple cards */
.mt-loader-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

@media (max-width: 768px) {
  .mt-loader-grid {
    grid-template-columns: 1fr;
  }
}

/* ========================================
   List Layout
   ======================================== */
.mt-loader-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

/* ========================================
   Dark Mode Support
   ======================================== */
@media (prefers-color-scheme: dark) {
  :root {
    --skeleton-bg: #2a2a2a;
    --skeleton-highlight: #3a3a3a;
  }
}

/* Explicit dark theme support (if using data-bs-theme) */
[data-bs-theme="dark"] {
  --skeleton-bg: #2a2a2a;
  --skeleton-highlight: #3a3a3a;
}

[data-bs-theme="dark"] .mt-loader-card {
  background: var(--bs-dark-bg-subtle, #212529);
  border-color: var(--bs-border-color, rgba(255,255,255,0.125));
}

/* Light theme defaults */
:root {
  --skeleton-bg: #e0e0e0;
  --skeleton-highlight: #f0f0f0;
}

/* ========================================
   Responsive Adjustments
   ======================================== */
@media (max-width: 576px) {
  .mt-loader-card {
    padding: 1rem;
  }
  
  .mt-skel--thumbnail {
    aspect-ratio: 4 / 3;
  }
  
  .mt-loader-card--media {
    flex-direction: column;
  }
  
  .mt-skel--square {
    width: 100%;
    height: auto;
    aspect-ratio: 16 / 9;
    margin-right: 0;
    margin-bottom: 0.75rem;
  }
}

/* ========================================
   MusicTree Brand Integration
   ======================================== */
.mt-loader.mt-brand {
  --skeleton-bg: rgba(171, 174, 187, 0.2); /* Zucchero with transparency */
  --skeleton-highlight: rgba(171, 174, 187, 0.35);
}

[data-bs-theme="dark"] .mt-loader.mt-brand {
  --skeleton-bg: rgba(99, 104, 130, 0.2); /* Grigio-blu with transparency */
  --skeleton-highlight: rgba(99, 104, 130, 0.35);
}

/* ========================================
   Helper Classes
   ======================================== */
.mt-loader--compact .mt-loader-card {
  padding: 1rem;
  margin-bottom: 1rem;
}

.mt-loader--spacious .mt-loader-card {
  padding: 2rem;
  margin-bottom: 2rem;
}

/* Hide real content when loading */
.is-loading {
  opacity: 0;
  position: absolute;
  pointer-events: none;
}