/* [ANCHOR: CSS-CANVAS-SVG] */
.canvas-container {
  height: 100%;
  overflow: auto;
  background: radial-gradient(circle at 1px 1px, var(--border) 1px, transparent 0);
  background-size: 24px 24px;
  display: flex;
  flex-direction: column;
  position: relative;
}

.canvas-banner {
  padding: 10px 16px;
  background: rgba(15, 23, 42, 0.75);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
  color: var(--text-muted);
}

[data-theme="light"] .canvas-banner {
  background: rgba(248, 250, 252, 0.85);
}

.svg-canvas {
  flex: 1;
  min-width: 980px;
  min-height: 680px;
  display: block;
}

/* 節點 Box */
.node-box {
  cursor: pointer;
  transition: opacity 0.2s ease;
}

.node-box:hover rect {
  stroke-width: 2.5px !important;
  stroke: var(--accent) !important;
  filter: drop-shadow(0 0 8px var(--accent-glow));
}

.node-box.selected rect {
  stroke-width: 3px !important;
  stroke: var(--accent) !important;
  filter: drop-shadow(0 0 12px var(--accent-glow));
}

.node-box.dimmed {
  opacity: 0.2;
}

.node-box.highlight-audit rect {
  stroke: #ef4444 !important;
  stroke-width: 2.5px !important;
  animation: pulseBorder 1.5s infinite alternate;
}

.flow-link {
  transition: stroke 0.2s ease, stroke-width 0.2s ease, opacity 0.2s ease;
}

.flow-link.dimmed {
  opacity: 0.15;
}

.flow-link.highlight {
  stroke: var(--accent) !important;
  stroke-width: 3px !important;
}

@keyframes pulseBorder {
  from { filter: drop-shadow(0 0 4px rgba(239, 68, 68, 0.4)); }
  to { filter: drop-shadow(0 0 12px rgba(239, 68, 68, 0.8)); }
}

/* 置頂連線標籤膠囊 */
.edge-label-group {
  pointer-events: none;
  user-select: none;
}
.edge-label-group text {
  font-family: inherit;
  font-weight: 700;
  letter-spacing: 0.2px;
}