.graph-panel-tooltip {
  position: fixed;
  padding: 0.6rem 1rem;
  border-radius: 8px;
  font-size: 1.4rem;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.15s;
  z-index: 1000;
}
.graph-panel-tooltip.visible {
  opacity: 1;
}

.graph-panel-info {
  position: fixed;
  right: -340px;
  top: 0;
  width: 320px;
  height: 100vh;
  overflow-y: auto;
  transition: right 0.3s ease;
  z-index: 900;
  padding: 1.5rem;
}
.graph-panel-info.open {
  right: 0;
}
.graph-panel-info h3 {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.5rem;
}
.graph-panel-info .gp-symbol {
  font-size: 1.8rem;
  text-align: center;
  padding: 1rem 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
}
.graph-panel-info .gp-field {
  display: flex;
  justify-content: space-between;
  padding: 0.4rem 0;
  font-size: 0.85rem;
}
.graph-panel-info .gp-field-col {
  flex-direction: column;
  gap: 0.3rem;
}
.graph-panel-info .gp-key {
  opacity: 0.6;
}
.graph-panel-info .gp-val {
  font-weight: 500;
}
.graph-panel-info .gp-close {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
  cursor: pointer;
  background: none;
  border: none;
  font-size: 1.2rem;
  opacity: 0.6;
}

.graph-panel-info .gp-description {
  margin-top: 0.75rem;
  padding: 0.6rem 0.75rem;
  border-radius: 8px;
  font-size: 0.82rem;
  font-style: italic;
  line-height: 1.5;
  opacity: 0.85;
  background: rgba(128, 128, 128, 0.08);
  border-left: 3px solid rgba(128, 128, 128, 0.3);
}

.graph-panel-info .gp-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.graph-panel-info .gp-header h3 {
  margin: 0;
  flex: 1;
}
.graph-panel-info .gp-header .gp-close {
  position: static;
  top: auto;
  right: auto;
}
.graph-panel-info .graph-panel-ai-btn {
  opacity: 1;
  pointer-events: auto;
}

.graph-node-ai-btn {
  width: 22px;
  height: 22px;
  transition: opacity 0.12s ease;
}

/* Transition for highlight/dim */
svg .node,
svg .edgePath,
svg .flowchart-link,
svg .edgeLabel {
  transition: opacity 0.25s;
}