#protocol-canvas-root {
  display: grid;
  grid-template-columns: 200px 1fr 280px;
  gap: 0.75rem;
  min-height: 640px;
  color: var(--text);
}

#protocol-canvas-root .pc-palette,
#protocol-canvas-root .pc-inspector {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.75rem;
}

#protocol-canvas-root .pc-palette h3,
#protocol-canvas-root .pc-inspector h3 {
  margin: 0 0 0.5rem;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--muted);
  text-transform: uppercase;
}

#protocol-canvas-root .pc-palette button {
  display: block;
  width: 100%;
  margin: 0 0 0.35rem;
  text-align: left;
}

#protocol-canvas-root .pc-stage {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  position: relative;
}

#protocol-canvas-root svg {
  width: 100%;
  height: 640px;
  display: block;
  color: var(--text);
  background: repeating-linear-gradient(
      0deg,
      transparent,
      transparent 19px,
      color-mix(in srgb, var(--border) 70%, transparent) 20px
    ),
    repeating-linear-gradient(
      90deg,
      transparent,
      transparent 19px,
      color-mix(in srgb, var(--border) 70%, transparent) 20px
    );
}

#protocol-canvas-root .pc-edge {
  stroke: var(--accent);
  stroke-width: 2;
}

#protocol-canvas-root .pc-arrow-head {
  fill: var(--accent);
}

#protocol-canvas-root .pc-node {
  fill: var(--surface-2);
  stroke: var(--border);
  stroke-width: 2;
}

#protocol-canvas-root .pc-node-selected {
  fill: color-mix(in srgb, var(--accent) 18%, var(--surface));
  stroke: var(--accent);
  stroke-width: 3;
}

#protocol-canvas-root svg text {
  fill: var(--text);
}

#protocol-canvas-root .pc-port-label {
  fill: var(--muted);
}

#protocol-canvas-root .pc-hint {
  color: var(--muted);
  font-size: 0.8rem;
  margin-top: 0.5rem;
}

#protocol-canvas-root .pc-inspector p {
  color: var(--muted);
  margin: 0 0 0.6rem;
}

#protocol-canvas-root .pc-inspector label {
  display: block;
  margin: 0 0 0.5rem;
  font-size: 0.85rem;
  color: var(--text);
}

#protocol-canvas-root .pc-inspector input,
#protocol-canvas-root .pc-inspector select {
  width: 100%;
  max-width: 100%;
}

#protocol-canvas-root .pc-palette-hint {
  margin: -0.15rem 0 0.55rem;
  font-size: 0.75rem;
  color: var(--muted);
  line-height: 1.35;
}

#protocol-canvas-root .pc-inspector textarea {
  width: 100%;
  box-sizing: border-box;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.45rem 0.55rem;
  border-radius: 8px;
  font: inherit;
  resize: vertical;
}

#protocol-canvas-root .pc-inspector input,
#protocol-canvas-root .pc-inspector select {
  box-sizing: border-box;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.45rem 0.55rem;
  border-radius: 8px;
  font: inherit;
}

#protocolCanvasNewForm.hidden {
  display: none;
}