/* ========================================
   MEC Library Styles
   ======================================== */

/* Filter Bar Container */
.mec-filter-bar {
  background: var(--color-bg-content);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  margin-bottom: var(--space-xxxl);
  display: grid;
  grid-template-columns: 2fr auto auto 1fr;
  gap: var(--space-md);
  align-items: center;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.04);
}

/* Search Input Container */
.mec-filter-bar__search {
  position: relative;
}

.mec-filter-bar__search i {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-muted);
  font-size: var(--font-size-base);
  pointer-events: none;
}

.mec-filter-bar__search input {
  width: 100%;
  padding: var(--space-sm) var(--space-md) var(--space-sm) 42px;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-base);
  font-family: 'Inter', sans-serif;
  background: var(--color-bg-page);
  color: var(--color-text);
  transition: border-color var(--transition-fast);
}

.mec-filter-bar__search input::placeholder {
  color: var(--color-text-muted);
}

.mec-filter-bar__search input:focus {
  outline: none;
  border-color: var(--color-primary);
  background: var(--color-bg-content);
}

/* Filter Dropdowns */
.mec-filter-bar__filters {
  display: contents;
}

.mec-filter-bar select {
  padding: var(--space-sm) var(--space-md);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg-page);
  color: var(--color-text);
  font-size: var(--font-size-sm);
  font-family: 'Inter', sans-serif;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  min-width: 140px;
}

.mec-filter-bar select:hover {
  border-color: var(--color-primary-light);
}

.mec-filter-bar select:focus {
  outline: none;
  border-color: var(--color-primary);
  background: var(--color-bg-content);
}

/* Results Count & Clear Button */
.mec-filter-bar__results {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-md);
}

.mec-filter-bar__results #mec-results-count {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  font-weight: 500;
  white-space: nowrap;
}

.mec-clear-btn {
  padding: var(--space-sm) var(--space-md);
  background: var(--color-bg-elevated);
  color: var(--color-text-secondary);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-sm);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.mec-clear-btn:hover {
  background: var(--color-accent);
  color: white;
  border-color: var(--color-accent);
}

/* Year Headers */
.mec-year-header {
  font-size: var(--font-size-xxl);
  font-weight: 700;
  color: var(--color-text);
  margin: var(--space-xxxl) 0 var(--space-lg);
  padding-bottom: var(--space-md);
  border-bottom: 3px solid var(--color-primary);
}

.mec-year-header:first-child {
  margin-top: var(--space-xl);
}

/* Tutorial Grid Container */
.mec-library {
  margin-top: var(--space-xl);
}

/* Tutorial Grid (per year) */
.mec-library-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-lg);
  margin-bottom: var(--space-xxl);
}

/* Tutorial Card */
.mec-card {
  background: var(--color-bg-content);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: var(--color-text);
  transition: all var(--transition-base);
  position: relative;
  contain: layout style paint;
}

.mec-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
  border-color: var(--color-primary);
}

/* Winner/Finalist Badges */
.mec-card--winner {
  border-top: 4px solid #FFD700;
}

.mec-card--finalist {
  border-top: 4px solid #C0C0C0;
}

.mec-card__badge {
  position: absolute;
  top: 12px;
  right: 12px;
  padding: 4px 12px;
  border-radius: var(--radius-sm);
  font-size: var(--font-size-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  z-index: 10;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.mec-card__badge--winner {
  background: #FFD700;
  color: #0A0A0A;
}

.mec-card__badge--finalist {
  background: #C0C0C0;
  color: #0A0A0A;
}

/* Thumbnail */
.mec-card__thumbnail {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg-elevated);
  overflow: hidden;
  flex-shrink: 0;
}

/* Dynamic Height - Cards with images */
.mec-card--has-image .mec-card__thumbnail {
  height: 140px;
}

/* Dynamic Height - Cards without images (smaller) */
.mec-card--no-image .mec-card__thumbnail {
  height: 80px;
}

.mec-card__thumbnail img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* Placeholder Icon */
.mec-card__placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg-elevated);
  color: var(--color-text-muted);
}

.mec-card--has-image .mec-card__placeholder {
  font-size: 48px;
}

.mec-card--no-image .mec-card__placeholder {
  font-size: 32px;
}

/* Card Content */
.mec-card__content {
  padding: var(--space-md);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.mec-card__title {
  font-size: var(--font-size-sm);
  font-weight: 600;
  line-height: 1.3;
  color: var(--color-text);
  margin: 0 0 var(--space-xs);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.mec-card__authors {
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
  line-height: 1.3;
  margin: 0;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.mec-card__keywords {
  display: none;
}

/* Card Link Footer */
.mec-card__link {
  padding: var(--space-sm);
  background: var(--color-bg-elevated);
  color: var(--color-primary);
  font-size: var(--font-size-xs);
  font-weight: 600;
  text-align: center;
  border-top: 1px solid var(--color-border);
  transition: all var(--transition-fast);
}

.mec-card__link i {
  margin-left: 4px;
  font-size: 12px;
}

.mec-card:hover .mec-card__link {
  background: var(--color-primary);
  color: white;
}

/* Empty State */
.mec-empty-state {
  text-align: center;
  padding: var(--space-xxxl);
  background: var(--color-bg-content);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
}

.mec-library-grid .mec-empty-state,
.mec-library-grid .mec-loading {
  grid-column: 1 / -1;
}

.mec-empty-state__icon {
  font-size: 72px;
  color: var(--color-text-muted);
  margin-bottom: var(--space-lg);
}

.mec-empty-state__title {
  font-size: var(--font-size-xxl);
  font-weight: 600;
  margin: 0 0 var(--space-md);
  color: var(--color-text);
}

.mec-empty-state__description {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  margin: 0;
  line-height: 1.6;
}

/* Loading State */
.mec-loading {
  text-align: center;
  padding: var(--space-xxxl);
}

.mec-loading__spinner {
  display: inline-block;
  width: 48px;
  height: 48px;
  border: 4px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: mec-spin 0.8s linear infinite;
}

@keyframes mec-spin {
  to { transform: rotate(360deg); }
}

.mec-loading__text {
  margin-top: var(--space-lg);
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
}

/* Responsive Breakpoints */
@media (max-width: 1024px) {
  .mec-filter-bar {
    grid-template-columns: 1fr auto auto auto;
    grid-template-rows: auto auto;
  }

  .mec-filter-bar__results {
    grid-column: 1 / -1;
    justify-content: space-between;
  }

  .mec-library-grid {
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  }
}

@media (max-width: 768px) {
  .mec-filter-bar {
    grid-template-columns: 1fr;
    grid-template-rows: auto auto auto auto;
  }

  .mec-filter-bar__filters {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: var(--space-sm);
  }

  .mec-filter-bar select {
    width: 100%;
  }

  .mec-filter-bar__results {
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-sm);
  }

  .mec-clear-btn {
    width: 100%;
  }

  .mec-library-grid {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }

  .mec-card__thumbnail {
    height: 130px !important;
  }

  .mec-card--no-image .mec-card__thumbnail {
    height: 70px !important;
  }
}

@media (max-width: 480px) {
  .mec-filter-bar {
    padding: var(--space-md);
  }

  .mec-filter-bar select {
    min-width: 100px;
  }

  .mec-card {
    border-radius: var(--radius-sm);
  }

  .mec-card__content {
    padding: var(--space-sm);
  }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
  .mec-card,
  .mec-filter-bar input,
  .mec-filter-bar select,
  .mec-clear-btn,
  .mec-card__link {
    transition: none;
  }

  .mec-card:hover {
    transform: none;
  }

  @keyframes mec-spin {
    to { transform: none; }
  }
}

/* Print Styles */
@media print {
  .mec-filter-bar {
    display: none;
  }

  .mec-card {
    break-inside: avoid;
  }

  .mec-card:hover {
    transform: none;
    box-shadow: none;
  }
}