/* Entity Graph Legend - chemie-lernen.org
 * Persistent legend for the Wissensnetz visualization
 * Integrated into page content flow above the graph
 */

/* Main legend container */
.kg-legend-container {
  margin-bottom: 20px;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
  border: 1px solid var(--border-color, #dee2e6);
  border-radius: 8px;
  overflow: hidden;
}

.kg-legend-container .card-header {
  padding: 14px 18px;
  background: linear-gradient(135deg, #2d6a4f 0%, #1e4a35 100%);
  border-radius: 8px 8px 0 0 !important;
  font-size: 1.05rem;
  font-weight: 600;
}

.kg-legend-container .card-header h2 {
  margin: 0;
  color: #fff;
}

.kg-legend-container .card-header i.fa {
  margin-right: 8px;
}

.kg-legend-container .card-body {
  padding: 20px;
}

.kg-legend-container .card-footer {
  padding: 10px 18px;
  background-color: rgba(0, 0, 0, 0.02);
  border-top: 1px solid var(--border-color, #e9ecef);
}

/* Legend Sections */
.kg-legend-section {
  margin-bottom: 16px;
}

.kg-legend-section:last-child {
  margin-bottom: 0;
}

.kg-legend-section h3 {
  margin-bottom: 8px;
  color: var(--text-dark, #2c3e50);
  font-size: 0.875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* Legend Items */
.kg-legend-items {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.kg-legend-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.875rem;
  line-height: 1.5;
  color: var(--text-dark, #495057);
}

/* Color indicators for nodes */
.kg-legend-color {
  display: inline-block;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  border: 2px solid #fff;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.15);
  flex-shrink: 0;
}

/* Icon indicators for articles */
.kg-legend-icon {
  font-size: 1rem;
  flex-shrink: 0;
}

/* Line indicators for relationships */
.kg-legend-line {
  display: inline-block;
  width: 28px;
  height: 4px;
  border-radius: 2px;
  flex-shrink: 0;
}

.kg-legend-line-dashed {
  background: linear-gradient(to right, currentColor 50%, transparent 50%);
  background-size: 8px 4px;
  background-repeat: repeat-x;
}

/* Responsive adjustments */
@media (max-width: 992px) {
  .kg-legend-container .card-body {
    padding: 16px;
  }

  .kg-legend-items {
    gap: 6px;
  }

  .kg-legend-item {
    font-size: 0.85rem;
    gap: 8px;
  }
}

@media (max-width: 768px) {
  .kg-legend-container {
    margin-bottom: 16px;
  }

  .kg-legend-color {
    width: 14px;
    height: 14px;
  }

  .kg-legend-line {
    width: 24px;
    height: 3px;
  }

  .kg-legend-container .card-header h2 {
    font-size: 0.95rem;
  }

  .kg-legend-section h3 {
    font-size: 0.8rem;
  }
}

@media (max-width: 576px) {
  .kg-legend-item {
    font-size: 0.825rem;
    gap: 6px;
  }

  .kg-legend-color {
    width: 12px;
    height: 12px;
  }

  .kg-legend-line {
    width: 20px;
  }

  .kg-legend-container .card-footer {
    flex-direction: column;
    gap: 6px;
    text-align: center;
  }

  .kg-legend-container .card-footer span {
    display: block;
  }

  .kg-legend-container .card-footer .float-right {
    float: none !important;
  }
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
  .kg-legend-container .card-header {
    background: linear-gradient(135deg, #343a40 0%, #212529 100%);
    border-color: var(--border-dark, #495057) !important;
  }

  .kg-legend-container .card-body {
    background-color: var(--bg-dark-card, #343a40);
  }

  .kg-legend-container .card-footer {
    background-color: rgba(255, 255, 255, 0.02);
    border-top-color: var(--border-dark, #495057);
    color: var(--text-muted-dark, #9ca3af) !important;
  }

  .kg-legend-color {
    border-color: var(--bg-dark-card, #343a40);
  }

  .kg-legend-section h3 {
    color: var(--text-dark, #adb5bd);
  }

  .kg-legend-item {
    color: var(--text-muted-dark, #9ca3af);
  }

  .kg-legend-section p {
    color: var(--text-muted-dark, #adb5bd);
  }
}

/* Animation for legend appearance */
@keyframes fadeInLegend {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.kg-legend-container {
  animation: fadeInLegend 0.4s ease-out;
}

/* Print styles */
@media print {
  .kg-legend-container {
    break-inside: avoid;
    page-break-inside: avoid;
  }

  .kg-legend-container .card-header {
    background: #2d6a4f !important;
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
  }
}

/* Old legend panel class for backwards compatibility */
.kg-legend-panel {
  display: none;
}

/* Graph filter controls (Artikel toggle + edge-labels toggle) */
#kg-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 10px;
  padding: 10px;
  background: #f8f9fa;
  border-radius: 8px;
  align-items: center;
}
.kg-filter-chip {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 12px;
  border: 1px solid #ddd;
  border-radius: 14px;
  background: #fff;
  cursor: pointer;
  font-size: 0.8rem;
  transition: all 0.2s;
  user-select: none;
}
.kg-filter-chip:hover {
  border-color: #999;
}
.kg-filter-chip.active {
  color: #fff;
  border-color: currentColor;
}
.kg-filter-chip .kg-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
}
@media (prefers-color-scheme: dark) {
  #kg-controls {
    background: #2a2a2a;
  }
  .kg-filter-chip {
    background: #333;
    border-color: #555;
    color: #ddd;
  }
  .kg-filter-chip:hover {
    border-color: #888;
  }
}