.interactive-layout {
  display: grid;
  grid-template-columns: 340px 1fr;
  gap: 24px;
  padding: 24px;
  min-height: calc(100vh - 140px);
}

.interactive-sidebar {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  overflow-y: auto;
}
.interactive-sidebar h1 { margin-top: 0; font-size: 22px; }
.interactive-sidebar h2 {
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin-top: 24px;
  margin-bottom: 12px;
}
.interactive-sidebar .lede { color: var(--muted); line-height: 1.5; }

.flow-buttons { display: flex; flex-direction: column; gap: 8px; }
.flow-btn {
  background: var(--bg-raised);
  border: 1px solid var(--border);
  color: var(--fg);
  padding: 10px 12px;
  border-radius: 8px;
  text-align: left;
  cursor: pointer;
  font: inherit;
  transition: background 120ms, border-color 120ms;
}
.flow-btn:hover, .flow-btn.active {
  background: var(--accent-soft);
  border-color: var(--accent);
}

.detail-panel {
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px;
  min-height: 120px;
  font-size: 14px;
  line-height: 1.55;
}
.detail-panel h3 { margin: 0 0 8px 0; color: var(--accent); font-size: 16px; }
.detail-panel p { margin: 6px 0; color: var(--fg); }
.detail-panel ul { padding-left: 18px; margin: 6px 0; }
.detail-panel code { background: var(--bg); padding: 1px 5px; border-radius: 4px; font-size: 13px; }

.legend { list-style: none; padding: 0; margin: 0; font-size: 13px; color: var(--muted); }
.legend li { margin-bottom: 6px; display: flex; align-items: center; gap: 8px; }
.dot { width: 10px; height: 10px; border-radius: 50%; display: inline-block; }
.dot-svc   { background: var(--accent); }
.dot-ext   { background: var(--ext); }
.dot-actor { background: var(--actor); }
.dot-msg   { background: var(--token); }

.interactive-stage {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
  display: flex;
  flex-direction: column;
}
#bdi-canvas { flex: 1; width: 100%; height: 100%; min-height: 560px; }

.legend-bottom {
  display: flex;
  gap: 18px;
  justify-content: center;
  padding-top: 8px;
  font-size: 12px;
  color: var(--muted);
}
.key { display: flex; align-items: center; gap: 6px; }
.sw { width: 20px; height: 3px; display: inline-block; border-radius: 2px; }
.sw-default { background: var(--border-strong); }
.sw-active  { background: var(--accent); height: 4px; }
.sw-token   { background: var(--token); height: 4px; }

/* Node styles */
.node rect {
  fill: var(--bg-raised);
  stroke: var(--border-strong);
  stroke-width: 1.5;
  transition: stroke 160ms, fill 160ms, filter 160ms;
}
.node text {
  fill: var(--fg);
  font-family: inherit;
  font-size: 13px;
  text-anchor: middle;
}
.node text.title { font-weight: 600; font-size: 18px; }
.node text.sub { fill: var(--muted); font-size: 12px; }
.node text.meta { fill: var(--muted); font-size: 11px; }
.node { cursor: pointer; }
.node:hover rect, .node.hover rect { stroke: var(--accent); }
.node.active rect { stroke: var(--accent); fill: var(--accent-soft); filter: url(#glow); }

.node.svc rect { stroke: var(--accent); }
.node.ext rect { stroke: var(--ext); }
.node.actor rect { stroke: var(--actor); }

/* Edges */
.edges path.edge {
  fill: none;
  stroke: var(--border-strong);
  stroke-width: 1.5;
  stroke-dasharray: 4 4;
  marker-end: url(#arrow);
  transition: stroke 160ms, stroke-width 160ms, stroke-dasharray 160ms;
  opacity: 0.65;
}
.edges path.edge.active {
  stroke: var(--accent);
  stroke-width: 2.5;
  stroke-dasharray: 0;
  marker-end: url(#arrow-active);
  opacity: 1;
}

.bg-line { stroke: var(--border); stroke-dasharray: 2 4; }
.group-label { fill: var(--muted); font-size: 11px; text-transform: uppercase; letter-spacing: 0.12em; }

/* Moving token bubble */
.token-bubble circle {
  fill: var(--token);
  filter: url(#glow);
}
.token-bubble text {
  fill: #0a0d14;
  font-size: 10px;
  font-weight: 600;
  text-anchor: middle;
  dominant-baseline: middle;
}

@media (max-width: 960px) {
  .interactive-layout { grid-template-columns: 1fr; }
  .interactive-sidebar { order: 2; }
}