/* Decision tree page — companion to style.css. Uses the same tokens. */

.meta-line {
  color: var(--color-text-muted);
  font-size: var(--text-caption);
  font-style: italic;
}

.tree-toolbar {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-top: var(--space-sm);
  flex-wrap: wrap;
}

.tree-reset-btn {
  font-family: var(--font-ui);
  font-size: var(--text-ui-sm);
  background: var(--color-card-bg);
  border: 1px solid var(--color-card-border);
  color: var(--color-text);
  padding: 6px 14px;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: border-color var(--dur-base) var(--ease-out-expo);
}

.tree-reset-btn:hover {
  border-color: var(--color-accent);
}

.tree-hint {
  font-family: var(--font-ui);
  font-size: var(--text-ui-xs);
  color: var(--color-text-muted);
  font-style: italic;
}

/* Dragging cue */
.tree-node {
  cursor: grab;
}

.tree-node:active {
  cursor: grabbing;
}

/* Full-width wrapper so the tree breaks out of .container's 1100px cap */
.tree-wide {
  padding: 0 var(--space-xl);
  margin: var(--space-lg) auto var(--space-2xl);
  max-width: 1700px;
}

.tree-container {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: var(--space-xl);
  align-items: start;
}

@media (max-width: 900px) {
  .tree-container {
    grid-template-columns: 1fr;
  }
}

#tree-svg-wrap {
  background: var(--color-card-bg);
  border: 1px solid var(--color-card-border);
  border-radius: var(--border-radius);
  padding: var(--space-md);
  overflow: auto;  /* allow horizontal scroll if tree exceeds container */
}

#tree-svg {
  display: block;
  font-family: var(--font-ui);
  /* width and height come from intrinsic attributes set by JS */
}

/* Node visual style */
.tree-node rect {
  fill: var(--color-card-bg);
  stroke: var(--color-card-border);
  stroke-width: 1px;
  transition: stroke var(--dur-base) var(--ease-out-expo),
              fill var(--dur-base) var(--ease-out-expo);
}

.tree-node:hover rect,
.tree-node.selected rect {
  stroke: var(--color-accent);
  stroke-width: 2px;
  cursor: pointer;
}

.tree-node.kind-root rect {
  fill: var(--color-nav-bg);
}

.tree-node.kind-root text.node-label {
  fill: var(--color-nav-text);
}

.tree-node.kind-leaf rect {
  fill: #fdf8f2;
}

.tree-node.kind-branch rect {
  fill: var(--color-card-bg);
}

.tree-node.kind-override rect {
  fill: #fff5f5;
  stroke-dasharray: 3 2;
}

.tree-node text.node-label {
  font-family: var(--font-ui);
  font-size: var(--text-ui-sm);
  font-weight: 600;
  fill: var(--color-heading);
  pointer-events: none;
}

.tree-node text.node-rate {
  font-family: var(--font-ui);
  font-size: var(--text-ui-xs);
  fill: var(--color-text-muted);
  pointer-events: none;
}

.tree-node text.node-sub {
  font-family: var(--font-ui);
  font-size: var(--text-ui-xs);
  fill: var(--color-text-muted);
  pointer-events: none;
}

/* Rare/unreachable branches rendered thin and dashed */
.tree-node.rare rect {
  stroke-dasharray: 2 3;
  opacity: 0.55;
}

.tree-node.rare text {
  opacity: 0.7;
}

/* Edges */
.tree-link {
  fill: none;
  stroke: var(--color-card-border);
  stroke-width: 1px;
}

.tree-link.rare {
  stroke-dasharray: 2 3;
  opacity: 0.45;
}

.tree-link.highlighted {
  stroke: var(--color-accent);
  stroke-width: 2px;
}

/* Side panel */
.tree-panel {
  background: var(--color-card-bg);
  border: 1px solid var(--color-card-border);
  border-radius: var(--border-radius);
  padding: var(--space-lg);
  position: sticky;
  top: calc(var(--nav-height) + var(--space-md));
}

.tree-panel-empty {
  color: var(--color-text-muted);
  font-style: italic;
  margin: 0;
}

.tree-panel h3 {
  font-family: var(--font-heading);
  font-size: var(--text-h4);
  margin-top: 0;
  margin-bottom: var(--space-sm);
}

.tree-panel .panel-label {
  font-family: var(--font-ui);
  font-size: var(--text-ui-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: var(--space-md);
  margin-bottom: var(--space-xs);
}

.tree-panel .panel-plain {
  font-size: var(--text-body);
  line-height: var(--leading-body);
  margin: 0 0 var(--space-md) 0;
}

.tree-panel .panel-code {
  font-family: var(--font-mono);
  font-size: var(--text-caption);
  background: var(--color-code-bg);
  padding: var(--space-sm);
  border-radius: var(--border-radius-sm);
  color: var(--color-text);
  word-break: break-word;
}

.tree-panel .panel-note {
  font-size: var(--text-caption);
  color: var(--color-text-muted);
  font-style: italic;
  margin-top: var(--space-md);
}

/* Visibility tag */
.vis-tag {
  display: inline-block;
  font-family: var(--font-ui);
  font-size: var(--text-ui-xs);
  font-weight: 600;
  padding: 2px 8px;
  border-radius: var(--border-radius-pill);
  letter-spacing: 0.02em;
}

.vis-glanceable {
  background: var(--phase-score-bg);
  color: var(--phase-score-text);
}

.vis-countable {
  background: var(--phase-cover-bg);
  color: var(--phase-cover-text);
}

.vis-arithmetic {
  background: var(--phase-chase-bg);
  color: var(--phase-chase-text);
}

.vis-model_only {
  background: var(--phase-redirect-bg);
  color: var(--phase-redirect-text);
}

/* Distribution bar */
.dist-bar {
  display: flex;
  height: 22px;
  border-radius: var(--border-radius-sm);
  overflow: hidden;
  margin-top: var(--space-xs);
  border: 1px solid var(--color-card-border);
}

.dist-bar-seg {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-ui);
  font-size: var(--text-ui-xs);
  color: #fff;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  padding: 0 4px;
}

.dist-legend {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-top: var(--space-xs);
  font-family: var(--font-ui);
  font-size: var(--text-ui-xs);
}

.dist-legend-item {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--color-text-muted);
}

.dist-legend-swatch {
  width: 10px;
  height: 10px;
  border-radius: 2px;
  display: inline-block;
}

.seg-points-fresh         { background: var(--data-triple); }
.seg-fresh-chase          { background: var(--data-single); }
.seg-1away-finish-theirs  { background: var(--data-double); }
.seg-marks-fresh          { background: var(--color-accent); }
.seg-marks-1away-finish   { background: #b07b4e; }
.seg-other                { background: var(--data-miss); color: var(--color-text); }

/* Legend block */
.vis-legend {
  list-style: none;
  padding: 0;
  margin: var(--space-md) 0;
}

.vis-legend li {
  margin: var(--space-xs) 0;
  font-size: var(--text-body);
}

/* Top traces list */
.trace-row {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-sm) 0;
  border-bottom: 1px solid var(--color-card-border);
}

.trace-row:last-child { border-bottom: none; }

.trace-rate {
  font-family: var(--font-ui);
  font-size: var(--text-ui-sm);
  font-weight: 700;
  color: var(--color-accent);
  min-width: 64px;
  text-align: right;
}

.trace-path {
  font-family: var(--font-mono);
  font-size: var(--text-caption);
  color: var(--color-text);
  flex: 1;
  overflow-x: auto;
  white-space: nowrap;
}

.trace-arrow {
  color: var(--color-text-muted);
  margin: 0 4px;
}