.canvas-shell .editor-main {
  display: flex;
  flex-direction: column;
  min-height: calc(100vh - 40px);
  padding-bottom: 0;
  overflow: hidden;
  position: relative;
  z-index: 0;
}

.canvas-shell .editor-sidebar {
  position: relative;
  z-index: 20;
}

.canvas-shell .page-adjacent-nav,
.canvas-shell .editor-error,
.canvas-shell .readonly-banner,
.canvas-shell .archived-banner,
.canvas-shell .live-prompt {
  flex-shrink: 0;
}

.canvas-main {
  min-width: 0;
  flex: 1 1 auto;
}

.canvas-workspace {
  flex: 1 1 auto;
  min-height: 0;
  display: flex;
  flex-direction: column;
}

.canvas-surface {
  flex: 1 1 auto;
  min-height: 0;
  border-top: 1px solid var(--border);
  color: var(--text);
  position: relative;
  overflow: hidden;
  background-color: var(--bg);
}

.canvas-viewport {
  position: absolute;
  inset: 0;
  overflow: hidden;
  outline: none;
  user-select: none;
  touch-action: none;
}

.canvas-viewport::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(color-mix(in srgb, var(--border) 14%, transparent) 1px, transparent 1px),
    linear-gradient(90deg, color-mix(in srgb, var(--border) 14%, transparent) 1px, transparent 1px);
  background-size: var(--canvas-grid-step, 32px) var(--canvas-grid-step, 32px);
  background-position: var(--canvas-grid-offset-x, 0) var(--canvas-grid-offset-y, 0);
}

.canvas-viewport:focus {
  outline: 1px dotted var(--block-focus-outline);
  outline-offset: -2px;
}

/* HUD overlays — each panel is independently positioned and clickable */
.canvas-chrome {
  position: absolute;
  inset: 0;
  z-index: 10;
  pointer-events: none;
}

.canvas-hud-bar {
  position: absolute;
  top: 10px;
  left: 10px;
  right: 258px;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px 10px;
  padding: 5px 8px;
  border: 1px solid var(--border);
  background: var(--bg);
  pointer-events: auto;
  max-width: calc(100% - 268px);
}

.canvas-hud-bar.canvas-hud-bar-solo {
  right: 10px;
  max-width: calc(100% - 20px);
}

.canvas-hud-tools,
.canvas-hud-view,
.canvas-hud-context {
  display: inline-flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 4px;
}

.canvas-hud-context {
  flex: 1 1 160px;
  min-width: 0;
  gap: 6px;
  padding: 0 4px;
  border-left: 1px solid var(--border);
  border-right: 1px solid var(--border);
}

.canvas-hud-summary {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--text-muted);
  font-size: 12px;
}

.canvas-hud-actions {
  display: inline-flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 4px;
  margin-left: auto;
}

.canvas-hud-actions button,
.canvas-hud-view button {
  font: inherit;
  font-size: 12px;
}

.canvas-hud-panel {
  position: absolute;
  top: 10px;
  right: 10px;
  bottom: 10px;
  width: 240px;
  display: flex;
  flex-direction: column;
  gap: 0;
  padding: 10px 12px 12px;
  border: 1px solid var(--border);
  background: var(--bg);
  pointer-events: auto;
  overflow: hidden;
}

.canvas-hud-panel .eyebrow {
  flex-shrink: 0;
  margin-bottom: 8px;
}

.canvas-hud-panel-body {
  flex: 1 1 auto;
  min-height: 0;
  overflow-y: auto;
}

.canvas-hud-banner {
  position: absolute;
  top: 10px;
  left: 10px;
  padding: 6px 10px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text-muted);
  font-size: 12px;
  pointer-events: auto;
}

.canvas-surface:fullscreen {
  width: 100vw;
  height: 100vh;
}

.canvas-surface:fullscreen .canvas-hud-panel {
  max-height: calc(100vh - 20px);
}

.canvas-surface.is-panning .canvas-svg,
.canvas-surface[data-tool="pan"] .canvas-svg {
  cursor: grab;
}

.canvas-surface.is-panning .canvas-svg:active,
.canvas-surface[data-tool="pan"] .canvas-svg:active {
  cursor: grabbing;
}

.canvas-empty-state {
  position: absolute;
  z-index: 2;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  max-width: 420px;
  padding: 14px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: var(--bg);
  pointer-events: none;
  text-align: center;
}

.canvas-surface:not(.is-empty) .canvas-empty-state {
  display: none;
}

.canvas-empty-state h2 {
  margin: 4px 0 8px;
  font-size: 1.05rem;
}

.canvas-empty-state p {
  margin: 0;
  color: var(--text-muted);
  font-size: 13px;
}

.canvas-hud-bar .editor-controls-group + .editor-controls-group {
  padding-left: 8px;
  border-left: 1px solid var(--border);
  margin-left: 0;
}

.canvas-hud-bar.editor-controls {
  margin: 0;
  --editor-control-height: 28px;
}

.canvas-hud-bar .editor-help-hint {
  display: none;
}

.canvas-properties-body {
  display: grid;
  gap: 10px;
  color: var(--text-muted);
  font-size: 12px;
}

.canvas-field {
  display: grid;
  gap: 4px;
}

.canvas-field label,
.canvas-field span {
  color: var(--text-muted);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.canvas-field input,
.canvas-field select,
.canvas-field textarea {
  width: 100%;
  box-sizing: border-box;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font: 13px/1.35 var(--font-body, system-ui, sans-serif);
  padding: 6px;
}

.canvas-field textarea {
  min-height: 74px;
  resize: vertical;
}

.canvas-layer-actions,
.canvas-align-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

.canvas-layer-actions button,
.canvas-align-actions button {
  font: inherit;
  font-size: 11px;
  padding: 4px 6px;
}

.canvas-color-palette {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

.canvas-color-swatch {
  width: 22px;
  height: 22px;
  padding: 0;
  border: 1px solid var(--border);
  background: var(--swatch-color, transparent);
  cursor: pointer;
  flex-shrink: 0;
}

.canvas-color-swatch.is-transparent {
  background:
    linear-gradient(45deg, var(--border) 25%, transparent 25%, transparent 75%, var(--border) 75%, var(--border)),
    linear-gradient(45deg, var(--border) 25%, transparent 25%, transparent 75%, var(--border) 75%, var(--border));
  background-size: 8px 8px;
  background-position: 0 0, 4px 4px;
}

.canvas-color-swatch.is-active {
  outline: 1px solid var(--block-focus-outline);
  outline-offset: 1px;
}

.canvas-color-swatch:hover,
.canvas-color-swatch:focus {
  border-color: var(--border-strong, var(--border));
  outline: none;
}

.canvas-color-custom {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-top: 2px;
}

.canvas-color-custom input[type="color"] {
  width: 28px;
  height: 28px;
  padding: 0;
  border: 1px solid var(--border);
  background: var(--bg);
  cursor: pointer;
}

.canvas-color-custom input[type="text"] {
  flex: 1 1 auto;
  min-width: 0;
}

.canvas-tool-btn {
  position: relative;
  gap: 0;
  padding: 0 4px !important;
}

.canvas-tool-icon {
  display: block;
  width: 16px;
  height: 16px;
}

.canvas-tool-kbd {
  position: absolute;
  right: 1px;
  bottom: 0;
  font-size: 8px;
  line-height: 1;
  color: var(--text-muted);
  font-family: inherit;
  pointer-events: none;
}

.canvas-svg {
  position: absolute;
  inset: 0;
  z-index: 1;
  width: 100%;
  height: 100%;
  cursor: default;
}

.canvas-surface[data-tool="block"] .canvas-svg,
.canvas-surface[data-tool="text"] .canvas-svg {
  cursor: crosshair;
}

.canvas-surface[data-tool="connector"] .canvas-svg {
  cursor: cell;
}

.canvas-object {
  cursor: grab;
}

.canvas-object:active {
  cursor: grabbing;
}

.canvas-object-shape {
  stroke-width: 1.5;
  vector-effect: non-scaling-stroke;
}

.canvas-object-label,
.canvas-free-text,
.canvas-image-caption {
  fill: var(--text);
  font: 13px/1.35 var(--font-body, system-ui, sans-serif);
  pointer-events: none;
  white-space: pre-wrap;
}

.canvas-free-text {
  font-size: 16px;
}

.canvas-text-background {
  fill: transparent;
  stroke: transparent;
  pointer-events: all;
}

.canvas-media-caption,
.canvas-image-caption {
  fill: var(--text-muted);
  font-size: 12px;
}

.canvas-media-link,
.canvas-image-link {
  cursor: zoom-in;
}

.canvas-connector-line {
  fill: none;
  stroke: var(--text-muted);
  stroke-width: 1.6;
  vector-effect: non-scaling-stroke;
  pointer-events: none;
}

.canvas-connector-hit-area {
  fill: none;
  stroke: transparent;
  stroke-width: 14;
  vector-effect: non-scaling-stroke;
  pointer-events: stroke;
  cursor: grab;
}

.canvas-connector-hit-area:active {
  cursor: grabbing;
}

.canvas-connector-preview {
  fill: none;
  stroke: var(--block-focus-outline);
  stroke-width: 1.6;
  stroke-dasharray: 6 4;
  vector-effect: non-scaling-stroke;
  pointer-events: none;
  opacity: 0.85;
}

.canvas-arrowhead {
  fill: var(--text-muted);
}

.canvas-connector-handle {
  fill: var(--bg);
  stroke: var(--block-focus-outline);
  stroke-width: 1.5;
  cursor: grab;
  pointer-events: all;
}

.canvas-media-frame,
.canvas-image-frame {
  fill: var(--bg);
  stroke: var(--border-strong, var(--border));
  stroke-width: 1;
}

.canvas-media-foreign {
  overflow: hidden;
}

.canvas-media-preview {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: #0f172a;
}

.canvas-surface:not(.is-readonly) .canvas-media-preview {
  pointer-events: none;
}

.canvas-media-file-card {
  fill: var(--surface-raised);
  stroke: var(--border);
  stroke-width: 1;
}

.canvas-media-file-label {
  fill: var(--text);
  font: 13px/1.35 var(--font-body, system-ui, sans-serif);
  pointer-events: none;
}

.canvas-selection-rect {
  fill: none;
  stroke: var(--block-focus-outline);
  stroke-width: 1.5;
  stroke-dasharray: 4 3;
  vector-effect: non-scaling-stroke;
  pointer-events: none;
}

.canvas-selection-marquee {
  fill: color-mix(in srgb, var(--block-focus-outline) 14%, transparent);
  stroke: var(--block-focus-outline);
  stroke-width: 1.25;
  stroke-dasharray: 5 4;
  vector-effect: non-scaling-stroke;
  pointer-events: none;
}

.canvas-resize-handle {
  fill: var(--bg);
  stroke: var(--block-focus-outline);
  stroke-width: 1.4;
  vector-effect: non-scaling-stroke;
  pointer-events: all;
}

.canvas-resize-handle-n,
.canvas-resize-handle-s {
  cursor: ns-resize;
}

.canvas-resize-handle-e,
.canvas-resize-handle-w {
  cursor: ew-resize;
}

.canvas-resize-handle-ne,
.canvas-resize-handle-sw {
  cursor: nesw-resize;
}

.canvas-resize-handle-nw,
.canvas-resize-handle-se {
  cursor: nwse-resize;
}

.canvas-anchor-point {
  fill: var(--bg);
  stroke: var(--block-focus-outline);
  stroke-width: 1.5;
  vector-effect: non-scaling-stroke;
  pointer-events: none;
}

.canvas-remote-selection {
  fill: none;
  stroke-width: 1.25;
  stroke-dasharray: 2 4;
  vector-effect: non-scaling-stroke;
  pointer-events: none;
}

.canvas-presence {
  pointer-events: none;
}

.canvas-presence-dot {
  stroke: var(--bg);
  stroke-width: 2;
}

.canvas-presence-label {
  paint-order: stroke;
  stroke: var(--bg);
  stroke-width: 3;
  font: 12px/1 var(--font-body, system-ui, sans-serif);
}

.canvas-hud-bar button.is-active {
  outline: 1px solid var(--block-focus-outline);
  outline-offset: 2px;
}

.canvas-text-editor {
  position: absolute;
  z-index: 12;
  min-width: 120px;
  min-height: 38px;
  resize: none;
  box-sizing: border-box;
  border: 1px solid var(--block-focus-outline);
  background: var(--bg);
  color: var(--text);
  font: 13px/1.35 var(--font-body, system-ui, sans-serif);
  padding: 8px;
  outline: none;
}

.canvas-image-lightbox {
  width: min(92vw, 1200px);
  max-width: none;
  max-height: 92vh;
  padding: 0;
  border: 1px solid var(--border-strong, var(--border));
  background: var(--bg);
  color: var(--text);
}

.canvas-image-lightbox::backdrop {
  background: rgba(15, 23, 42, 0.72);
}

.canvas-image-lightbox-close {
  position: absolute;
  top: 10px;
  right: 10px;
  z-index: 1;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  cursor: pointer;
  font: 12px/1 var(--font-body, system-ui, sans-serif);
  padding: 7px 9px;
}

.canvas-image-lightbox-media {
  display: block;
  width: 100%;
  max-height: calc(92vh - 44px);
  object-fit: contain;
  background: #0f172a;
}

.canvas-image-lightbox-caption {
  padding: 10px 14px;
  color: var(--text-muted);
  font: 13px/1.35 var(--font-body, system-ui, sans-serif);
}

.canvas-drop-active .canvas-viewport {
  outline: 1px dashed var(--block-focus-outline);
  outline-offset: -4px;
}

.canvas-status {
  position: absolute;
  z-index: 11;
  left: 10px;
  bottom: 10px;
  max-width: min(480px, calc(100% - 268px));
  padding: 4px 8px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text-muted);
  font-size: 12px;
  pointer-events: none;
}

@media (max-width: 900px) {
  .canvas-hud-bar {
    right: 10px;
    max-width: calc(100% - 20px);
  }

  .canvas-hud-panel {
    top: auto;
    bottom: 10px;
    width: auto;
    left: 10px;
    max-height: 38vh;
  }

  .canvas-hud-context {
    flex-basis: 100%;
    border-left: 0;
    border-right: 0;
    border-top: 1px solid var(--border);
    padding-top: 6px;
    margin-top: 2px;
  }

  .canvas-status {
    max-width: calc(100% - 20px);
    bottom: calc(38vh + 20px);
  }
}