/* ============================================================================
   MINI-INTERACTIVE WIDGETS — D3/Plotly Inline Tools
   ============================================================================ */

/* --- Shared mini-tool layout --- */
.mini-tool-container {
  position: relative;
  background: #fafbfc;
  border-radius: 8px;
  overflow: hidden;
}

.mini-tool-container svg {
  display: block;
  width: 100%;
}

.mini-tool-container .plotly-graph-div {
  border-radius: 8px;
}

/* --- Controls bar for interactive widgets --- */
.mini-tool-controls {
  display: flex;
  gap: 1rem;
  align-items: center;
  padding: 0.75rem 1rem;
  background: #f1f5f9;
  border-radius: 8px;
  margin-bottom: 0.75rem;
  flex-wrap: wrap;
}

.mini-tool-controls label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--app-muted);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.mini-tool-controls input[type="range"] {
  width: 120px;
  accent-color: var(--app-accent);
}

.mini-tool-controls select {
  padding: 0.3rem 0.5rem;
  border: 1px solid var(--app-border);
  border-radius: 6px;
  font-size: 0.85rem;
  background: white;
}

.mini-tool-controls .control-value {
  font-family: 'Menlo', 'Consolas', monospace;
  font-size: 0.85rem;
  color: var(--app-accent);
  font-weight: 700;
  min-width: 40px;
}

/* --- D3 tooltip --- */
.mini-tool-tooltip {
  position: absolute;
  pointer-events: none;
  background: rgba(15, 23, 42, 0.9);
  color: white;
  padding: 0.4rem 0.75rem;
  border-radius: 6px;
  font-size: 0.8rem;
  white-space: nowrap;
  z-index: 10;
  opacity: 0;
  transition: opacity 0.15s ease;
}

.mini-tool-tooltip.visible {
  opacity: 1;
}

/* --- D3 axis styles --- */
.mini-tool-container .axis text {
  font-size: 11px;
  fill: var(--app-muted);
}

.mini-tool-container .axis path,
.mini-tool-container .axis line {
  stroke: var(--app-border);
}

.mini-tool-container .axis-label {
  font-size: 12px;
  font-weight: 600;
  fill: var(--app-text);
}

/* --- Draggable points --- */
.mini-tool-container .draggable-point {
  cursor: grab;
  transition: r 0.15s ease;
}

.mini-tool-container .draggable-point:hover {
  r: 7;
}

.mini-tool-container .draggable-point:active {
  cursor: grabbing;
}

/* --- Stat display overlay --- */
.mini-tool-stat {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
  background: rgba(255, 255, 255, 0.95);
  border: 1px solid var(--app-border);
  border-radius: 8px;
  padding: 0.5rem 0.75rem;
  font-size: 0.8rem;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

.mini-tool-stat .stat-label {
  color: var(--app-muted);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.mini-tool-stat .stat-value {
  font-family: 'Menlo', 'Consolas', monospace;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--app-accent);
}

/* --- Reset button --- */
.mini-tool-reset {
  position: absolute;
  bottom: 0.75rem;
  right: 0.75rem;
  padding: 0.3rem 0.75rem;
  background: var(--app-card-bg);
  border: 1px solid var(--app-border);
  border-radius: 6px;
  font-size: 0.8rem;
  cursor: pointer;
  color: var(--app-muted);
  transition: all 0.15s ease;
}

.mini-tool-reset:hover {
  background: var(--app-bg);
  color: var(--app-text);
}

/* ============================================================================
   VARIABLE TYPE SORTER — Drag-and-Drop Widget
   ============================================================================ */

.vts-wrapper {
  padding: 0.5rem 0;
}

.vts-instructions {
  font-size: 0.9rem;
  color: var(--app-muted);
  margin-bottom: 0.75rem;
}

.vts-score-bar {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.6rem 1rem;
  background: var(--app-bg);
  border-radius: 8px;
  margin-bottom: 1rem;
  font-size: 0.9rem;
}

.vts-score-text strong {
  color: var(--app-accent);
  font-size: 1.05rem;
}

.vts-check-btn,
.vts-reset-btn {
  padding: 0.35rem 1rem;
  border: 1px solid var(--app-accent);
  border-radius: 6px;
  background: #eef2ff;
  color: var(--app-accent);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s ease;
}

.vts-check-btn:hover { background: var(--app-accent); color: #fff; border-color: var(--app-accent); }
.vts-reset-btn { border-color: var(--app-border); background: #f8fafc; color: var(--app-muted); }
.vts-reset-btn:hover { background: var(--app-bg); color: var(--app-text); border-color: var(--app-text); }

/* Card bank */
.vts-card-bank {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 1rem;
  background: var(--app-bg);
  border: 2px dashed var(--app-border);
  border-radius: 8px;
  min-height: 60px;
  margin-bottom: 1rem;
  transition: border-color 0.2s;
}

.vts-card-bank.vts-drag-over {
  border-color: var(--app-accent);
  background: rgba(42, 125, 225, 0.04);
}

.vts-bank-label {
  width: 100%;
  font-size: 0.8rem;
  color: var(--app-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 0.25rem;
}

/* Individual cards */
.vts-card {
  padding: 0.4rem 0.85rem;
  background: var(--app-card-bg);
  border: 1px solid var(--app-border);
  border-radius: 6px;
  font-size: 0.85rem;
  cursor: grab;
  user-select: none;
  transition: all 0.15s ease;
  box-shadow: 0 1px 3px rgba(0,0,0,0.06);
}

.vts-card:hover {
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
  transform: translateY(-1px);
}

.vts-card.vts-dragging {
  opacity: 0.5;
  cursor: grabbing;
}

.vts-card.vts-correct {
  background: #e8f5e9;
  border-color: var(--app-success);
  cursor: default;
}

.vts-card.vts-incorrect {
  background: #ffebee;
  border-color: var(--app-danger);
  cursor: default;
}

.vts-card.vts-unplaced {
  background: #fff3e0;
  border-color: var(--app-warning);
  opacity: 0.7;
  cursor: default;
}

/* Bucket row */
.vts-buckets-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.75rem;
}

@media (max-width: 768px) {
  .vts-buckets-row {
    grid-template-columns: repeat(2, 1fr);
  }
}

.vts-bucket {
  border: 2px solid var(--app-border);
  border-radius: 8px;
  overflow: hidden;
  transition: border-color 0.2s;
}

.vts-bucket.vts-drag-over {
  border-color: inherit;
  box-shadow: 0 0 0 2px rgba(42, 125, 225, 0.2);
}

.vts-bucket-header {
  padding: 0.5rem 0.75rem;
  color: #fff;
  text-align: center;
  font-size: 0.85rem;
}

.vts-bucket-header strong {
  display: block;
  font-size: 0.95rem;
}

.vts-bucket-desc {
  display: block;
  font-size: 0.7rem;
  opacity: 0.85;
  margin-top: 2px;
}

.vts-bucket-body {
  min-height: 80px;
  padding: 0.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  align-content: flex-start;
}

/* ============================================================================
   DISTRIBUTION SHAPE EXPLORER — Plotly Widget
   ============================================================================ */

.dse-wrapper {
  padding: 0.25rem 0;
}

.dse-context {
  font-size: 0.85rem;
  color: var(--app-muted);
  font-style: italic;
  margin-bottom: 0.5rem;
}

.dse-chart {
  width: 100%;
  height: 280px;
  border-radius: 8px;
  overflow: hidden;
}

.dse-stats {
  display: flex;
  gap: 1.5rem;
  padding: 0.75rem 1rem;
  background: var(--app-bg);
  border-radius: 8px;
  margin: 0.75rem 0;
  font-size: 0.9rem;
  flex-wrap: wrap;
}

.dse-stat {
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.dse-stat strong {
  font-family: 'Menlo', 'Consolas', monospace;
}

.dse-stat-dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.dse-controls {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.dse-slider-group {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.dse-slider-group label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--app-muted);
  min-width: 130px;
}

.dse-slider-group input[type="range"] {
  flex: 1;
  max-width: 300px;
  accent-color: var(--app-accent);
}

.dse-slider-labels {
  display: flex;
  justify-content: space-between;
  width: 300px;
  font-size: 0.7rem;
  color: var(--app-muted);
}

.dse-n-value {
  font-family: 'Menlo', 'Consolas', monospace;
  font-size: 0.85rem;
  color: var(--app-accent);
  font-weight: 700;
}

.dse-preset-group {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.dse-preset-label {
  font-size: 0.8rem;
  color: var(--app-muted);
}

.dse-preset {
  padding: 0.3rem 0.7rem;
  border: 1px solid var(--app-accent);
  border-radius: 6px;
  background: #eef2ff;
  color: var(--app-accent);
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s ease;
}

.dse-preset:hover {
  background: var(--app-accent);
  color: #fff;
  border-color: var(--app-accent);
}

/* ============================================================================
   ASSESSMENT VISIBILITY — Toggle & Required Badge
   ============================================================================ */

.assessment-toggle-wrapper {
  margin: 1rem 0;
}

.assessment-toggle-btn {
  display: block;
  width: 100%;
  padding: 0.75rem 1rem;
  background: var(--app-bg);
  border: 1px dashed var(--app-border);
  border-radius: 8px;
  font-size: 0.9rem;
  cursor: pointer;
  color: var(--app-muted);
  text-align: left;
  transition: all 0.15s ease;
}

.assessment-toggle-btn:hover {
  border-color: var(--app-accent);
  color: var(--app-accent);
  background: rgba(42, 125, 225, 0.04);
}

.assessment-toggle-btn[aria-expanded="true"] {
  border-style: solid;
  border-bottom-left-radius: 0;
  border-bottom-right-radius: 0;
  margin-bottom: 0;
}

.assessment-toggle-wrapper .chapter-block.assessment {
  border-top-left-radius: 0;
  border-top-right-radius: 0;
  margin-top: 0;
}

.assessment-required-badge {
  display: inline-block;
  padding: 0.15rem 0.5rem;
  background: var(--app-danger);
  color: #fff;
  font-size: 0.7rem;
  font-weight: 700;
  border-radius: 4px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-left: 0.5rem;
  vertical-align: middle;
}

.chapter-block.assessment.assessment-required {
  border-left: 3px solid var(--app-danger);
}