/* ==========================================================================
   EDISON — Charts & Visualizations CSS
   ========================================================================== */

.chart-svg-container {
  width: 100%;
  height: 100%;
  position: relative;
  overflow: visible;
}

.chart-svg {
  width: 100%;
  height: 100%;
  display: block;
  overflow: visible;
}

.sparkline-svg {
  min-height: 22px;
}

.sparkline-line {
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.sparkline-area {
  pointer-events: none;
}

.sparkline-endpoint {
  transition: r var(--dur-instant) var(--ease-out);
}

.chart-live-region {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ---------------------------------------------------------------------------
   Trajectory & Line Charts (CH-03, CH-09, CH-10, CH-14)
   --------------------------------------------------------------------------- */
.chart-axis-line {
  stroke: rgba(11, 18, 32, 0.08);
  stroke-width: 1;
}

[data-theme="dark"] .chart-axis-line {
  stroke: rgba(255, 255, 255, 0.08);
}

.chart-grid-line {
  stroke: rgba(11, 18, 32, 0.04);
  stroke-width: 1;
  stroke-dasharray: 3 3;
}

[data-theme="dark"] .chart-grid-line {
  stroke: rgba(255, 255, 255, 0.04);
}

.chart-axis-label {
  font-family: var(--font-mono);
  font-size: 10px;
  fill: var(--text-muted);
  user-select: none;
}

.chart-series-line {
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: stroke var(--dur-quick) var(--ease-out);
}

.chart-series-area {
  opacity: 0.08;
  pointer-events: none;
}

.chart-data-point {
  cursor: pointer;
  transition: transform var(--dur-instant) var(--ease-out), r var(--dur-instant) var(--ease-out);
}

.chart-data-point:hover {
  r: 6px;
  filter: drop-shadow(0 0 6px var(--accent-blue-glow-strong));
}

.chart-data-point:focus {
  outline: none;
  filter: drop-shadow(0 0 6px var(--accent-blue-glow-strong));
}

.chart-data-point:focus-visible {
  stroke-width: 3;
}

.chart-crosshair {
  stroke: var(--accent-blue);
  stroke-width: 1;
  stroke-dasharray: 2 2;
  pointer-events: none;
  opacity: 0.6;
}

/* ---------------------------------------------------------------------------
   Radial Progress Indicators (CH-04)
   --------------------------------------------------------------------------- */
.radial-track {
  fill: none;
  stroke: var(--canvas-mist);
  stroke-width: 6;
}

.radial-fill {
  fill: none;
  stroke-linecap: round;
  stroke-width: 6;
  transition: stroke-dashoffset 1000ms var(--ease-out);
}

.radial-fill.blue {
  stroke: var(--accent-blue);
  filter: drop-shadow(0 0 4px var(--accent-blue-glow));
}

.radial-fill.violet {
  stroke: var(--accent-violet);
  filter: drop-shadow(0 0 4px var(--accent-violet-glow));
}

.radial-fill.success {
  stroke: var(--status-success);
  filter: drop-shadow(0 0 4px var(--status-success-glow));
}

.radial-center-text {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 14px;
  fill: var(--text-primary);
  text-anchor: middle;
  dominant-baseline: central;
}

/* ---------------------------------------------------------------------------
   Subject Comparison Horizontal Bars (CH-05)
   --------------------------------------------------------------------------- */
.subject-bar-row {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding: var(--space-2) 0;
  cursor: pointer;
  border-radius: var(--radius-sm);
  transition: background-color var(--dur-instant) var(--ease-out);
}

.subject-bar-row:hover {
  background: var(--canvas-mist);
}

.subject-bar-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: var(--text-xs);
}

.subject-bar-name {
  font-weight: 600;
  color: var(--text-primary);
}

.subject-bar-metrics {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
}

.subject-track-wrap {
  width: 100%;
  height: 8px;
  background: var(--canvas-mist);
  border-radius: var(--radius-pill);
  position: relative;
  overflow: visible;
}

.subject-fill-bar {
  height: 100%;
  border-radius: var(--radius-pill);
  background: var(--accent-blue);
  transition: width 600ms var(--ease-out);
}

.subject-target-marker {
  position: absolute;
  top: -2px;
  bottom: -2px;
  width: 2px;
  background: var(--text-faint);
  border-radius: 1px;
}

/* ---------------------------------------------------------------------------
   Learning Heatmap (CH-06)
   --------------------------------------------------------------------------- */
.heatmap-grid-wrap {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.heatmap-svg {
  width: 100%;
  height: 130px;
}

.heatmap-cell {
  cursor: pointer;
  transition: transform var(--dur-instant) var(--ease-out);
  rx: 2px;
  ry: 2px;
}

.heatmap-cell:hover {
  transform: scale(1.4);
  transform-origin: center;
  stroke: var(--accent-blue-bright);
  stroke-width: 1;
}

/* ---------------------------------------------------------------------------
   Network Learning Map (CH-07)
   --------------------------------------------------------------------------- */
.network-map-svg {
  width: 100%;
  height: 220px;
}

.network-node {
  cursor: pointer;
  transition: transform var(--dur-quick) var(--ease-out);
}

.network-node:hover {
  transform: scale(1.1);
  transform-origin: center;
}

.network-edge {
  stroke: var(--text-faint);
  opacity: 0.35;
  transition: opacity var(--dur-instant) var(--ease-out), stroke var(--dur-instant) var(--ease-out);
}

.network-node.is-dimmed {
  opacity: 0.22;
  filter: grayscale(0.65);
}

.network-node.is-selected {
  filter: drop-shadow(0 0 8px var(--accent-blue-glow-strong));
}

.network-edge.is-dimmed {
  opacity: 0.08;
}

.chart-crosshair {
  stroke: var(--accent-blue);
  stroke-width: 1;
  stroke-dasharray: 3 3;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--dur-instant) var(--ease-out);
}

.chart-crosshair.visible {
  opacity: 0.5;
}

.network-flow-dot {
  fill: var(--accent-blue-bright);
}

/* ---------------------------------------------------------------------------
   Chart Tooltips
   --------------------------------------------------------------------------- */
.chart-tooltip {
  position: absolute;
  pointer-events: none;
  background: var(--canvas-glass-strong);
  backdrop-filter: blur(12px) saturate(140%);
  -webkit-backdrop-filter: blur(12px) saturate(140%);
  border: var(--border-strong);
  border-radius: var(--radius-sm);
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-xs);
  color: var(--text-primary);
  box-shadow: var(--shadow-pop);
  z-index: 1200;
  opacity: 0;
  transition: opacity var(--dur-instant) var(--ease-out), transform var(--dur-instant) var(--ease-out);
  transform: translate(-50%, -100%) translateY(-8px);
  white-space: nowrap;
}

.chart-tooltip.visible {
  opacity: 1;
  transform: translate(-50%, -100%) translateY(-10px);
}

.chart-tooltip-header {
  font-weight: 600;
  margin-bottom: 2px;
  color: var(--text-secondary);
}

.chart-tooltip-row {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
}

.tooltip-color-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
}

.chart-hint {
  margin: var(--space-1) 0 0;
  color: var(--text-faint);
  font-size: 10px;
  text-align: right;
}

[data-motion="reduced"] .radial-fill,
[data-motion="off"] .radial-fill {
  transition: none;
}

.heatmap-swatch {
  width: 10px;
  height: 10px;
  border-radius: 2px;
}

.heatmap-swatch.level-0 { background: var(--canvas-mist); }
.heatmap-swatch.level-1 { background: rgba(46, 91, 255, 0.3); }
.heatmap-swatch.level-2 { background: rgba(46, 91, 255, 0.6); }
.heatmap-swatch.level-3 { background: var(--accent-blue); }
.heatmap-swatch.level-4 { background: var(--accent-blue-deep); }