/* ═══════════════════════════════════════════════════════════════
   cadmic.app — Application Styles
   AutoCAD-inspired dark professional CAD theme
   ═══════════════════════════════════════════════════════════════ */

:root {
  --bg-primary:    #1e1e2e;
  --bg-secondary:  #252536;
  --bg-toolbar:    #2d2d3f;
  --bg-btn:        #2e2e44;
  --bg-panel:      #1a1a2a;
  --bg-canvas:     #1a1a2e;
  --bg-input:      #12121e;
  --bg-hover:      #3a3a50;
  --bg-active:     #4a4a6a;
  --bg-menu:       #282840;
  --bg-dropdown:   #2a2a42;
  --border:        #3a3a50;
  --border-subtle: #2a2a3e;
  --text-primary:  #d4d4e0;
  --text-secondary:#8888a0;
  --text-muted:    #666680;
  --accent:        #4fc3f7;
  --accent-hover:  #29b6f6;
  --accent-dim:    rgba(79,195,247,0.15);
  --error:         #ef5350;
  --warning:       #ffa726;
  --success:       #66bb6a;
  --selection:     rgba(79,195,247,0.3);
  --x-axis:        #ef5350;
  --y-axis:        #66bb6a;
  --z-axis:        #42a5f5;
  --font:          'Segoe UI', system-ui, -apple-system, sans-serif;
  --font-mono:     'Consolas', 'Courier New', monospace;
  --toolbar-h:     36px;
  --menubar-h:     28px;
  --statusbar-h:   26px;
  --cmdbar-h:      30px;
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html {
  height: 100%;
  min-width: 800px;
  min-height: 600px;
  overflow: auto;   /* shows scrollbars when window < 800×600 */
}
body {
  height: 100%;
  min-width: 800px;
  min-height: 600px;
  overflow: hidden; /* internal CAD layout must not scroll itself */
}
body {
  font-family: var(--font);
  font-size: 13px;
  color: var(--text-primary);
  background: var(--bg-primary);
  user-select: none;
  -webkit-user-select: none;
}

/* ═══════════════════════════════════════════════════════════════
   LAYOUT — Outer shell: CAD app column + ad sidebar column
   ═══════════════════════════════════════════════════════════════ */
#app-shell {
  display: flex;
  flex-direction: row;
  height: 100vh;
  width: 100vw;
}

/* ═══════════════════════════════════════════════════════════════
   LAYOUT — Full-height flex column (CAD canvas area)
   ═══════════════════════════════════════════════════════════════ */
#app {
  display: flex;
  flex-direction: column;
  height: 100vh;
  flex: 1;
  min-width: 640px;
  min-height: 600px;
}

/* ── Menu Bar (category tabs) ── */
#menuBar {
  display: flex;
  align-items: stretch;
  height: var(--menubar-h);
  background: var(--bg-panel);
  border-bottom: 1px solid var(--border);
  padding: 0 4px;
  flex-shrink: 0;
  z-index: 300;
  position: relative;
}
#menubar-brand>pre {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  font-size: 23px;
  font-weight: 800;
  color: var(--accent);
  letter-spacing: 0.01em;
  line-height: var(--menubar-h);
  pointer-events: none;
  white-space: nowrap;
  user-select: none;
}
.cat-btn {
  padding: 0 14px;
  cursor: pointer;
  border: none;
  border-bottom: 2px solid transparent;
  border-radius: 0;
  background: transparent;
  font-size: 12px;
  font-family: var(--font);
  color: var(--text-secondary);
  transition: color 0.1s, border-color 0.1s;
  user-select: none;
  white-space: nowrap;
}
.menubar-spacer {
  flex: 1;
}
.menubar-divider {
  width: 1px;
  height: 14px;
  background: var(--border);
  align-self: center;
  margin: 0 2px;
}

/* ── Menubar dropdown (File menu) ── */
.menubar-menu-wrap {
  position: relative;
  display: inline-flex;
  align-items: stretch;
  z-index: 700;
}
.menubar-dropdown {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 180px;
  background: var(--bg-dropdown);
  border: 1px solid var(--border);
  border-radius: 0 4px 4px 4px;
  padding: 4px 0;
  box-shadow: 0 8px 24px rgba(0,0,0,0.5);
  z-index: 600;
  margin-top: 1px;
}
.menubar-dropdown.open { display: block; }
.menubar-dropdown .menu-item { font-size: 12px; }
.menubar-dropdown .menu-sep { height: 1px; background: var(--border-subtle); margin: 4px 8px; }
a.menubar-link {
  text-decoration: none;
  display: inline-flex;
  align-items: center;
}
.cat-btn:hover {
  color: var(--text-primary);
  border-bottom-color: var(--border);
}
.cat-btn.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
  font-weight: 600;
}

/* ── Command Panels (contextual toolbar rows) ── */
.cmd-panel {
  display: flex;
  align-items: center;
  gap: 2px;
  flex: 1;
  min-width: 0;
  overflow: visible;
}
.cmd-panel.hidden { display: none; }

/* ── Context Menu items (shared .menu-item style) ── */
.menu-item {
  display: flex;
  align-items: center;
  padding: 5px 16px 5px 12px;
  cursor: pointer;
  font-size: 12px;
  color: var(--text-primary);
  white-space: nowrap;
}
.menu-item:hover { background: var(--accent-dim); }
.menu-sep { height: 1px; background: var(--border-subtle); margin: 4px 8px; }

/* ── Toolbar ── */
#toolbar {
  display: flex;
  align-items: center;
  height: var(--toolbar-h);
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-subtle);
  padding: 0 6px;
  gap: 2px;
  flex-shrink: 0;
  overflow: visible;
  position: relative;
  z-index: 200;
}
#toolbar-right {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 1px;
  flex-shrink: 0;
  padding-left: 6px;
}
#toolbar-center {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  pointer-events: none;
}
#toolbar-center > * {
  pointer-events: auto;
}
#toolbar-center #drawingName {
  pointer-events: auto;
}
#drawingName {
  font-size: 11px;
  font-style: italic;
  color: var(--text-secondary);
  opacity: 0.7;
  padding: 0 6px;
  margin-left: 12px;
  white-space: nowrap;
  max-width: 320px;
  overflow: hidden;
  /* Right-align so long names overflow to the LEFT — the filename end stays visible */
  text-align: right;
  user-select: none;
  cursor: text;
  align-self: center;
}
#drawingName:hover {
  opacity: 1;
  color: var(--text-primary, #c8c8dc);
}
#drawingNameInput {
  font-size: 11px;
  font-style: italic;
  background: var(--bg-secondary, #1e1e2e);
  color: var(--text-primary, #c8c8dc);
  border: 1px solid var(--border-subtle, #444);
  border-radius: 3px;
  padding: 1px 5px;
  width: 140px;
  outline: none;
}
.tb-sep {
  width: 1px;
  height: 20px;
  background: var(--border-subtle);
  margin: 0 4px;
}
.tb-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 28px;
  height: 26px;
  padding: 0 6px;
  border: 1px solid var(--border-subtle);
  border-radius: 3px;
  background: var(--bg-btn);
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 12px;
  font-family: var(--font);
  transition: background 0.1s, color 0.1s;
  white-space: nowrap;
}
.tb-btn:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
  border-color: var(--border);
}
.tb-btn.active {
  background: var(--accent-dim);
  color: var(--accent);
  border-color: var(--accent);
}
.tb-btn svg { width: 16px; height: 16px; flex-shrink: 0; }
.tb-label { margin-left: 4px; }

/* ── Toolbar Split Button ── */
.tb-split-btn {
  display: inline-flex;
  align-items: center;
}
.tb-split-main {
  border-radius: 3px 0 0 3px;
  border-right: none;
}
.tb-split-arrow {
  min-width: 18px;
  padding: 0 5px;
  border-radius: 0 3px 3px 0;
  border-left: 1px solid var(--border-subtle);
  font-size: 9px;
}
.tb-split-main.active {
  background: var(--accent-dim);
  color: var(--accent);
  border-color: var(--accent);
}
.tb-split-main.active + .tb-split-arrow {
  background: var(--accent-dim);
  color: var(--accent);
  border-color: var(--accent);
  border-left-color: var(--accent);
}

/* ── Toolbar Dropdowns ── */
.tb-dropdown {
  position: relative;
  display: inline-flex;
}
.tb-dropdown-menu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 200px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 4px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.4);
  z-index: 900;
  padding: 4px 0;
  margin-top: 2px;
}
.tb-dropdown-menu.open { display: flex; flex-direction: column; }
.tb-dropdown-item {
  display: block;
  width: 100%;
  padding: 6px 14px;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-size: 12px;
  font-family: var(--font);
  text-align: left;
  cursor: pointer;
  white-space: nowrap;
}
.tb-dropdown-item:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}
.tb-dropdown-item.active {
  color: var(--accent);
  background: var(--accent-dim);
}
.tb-strategy-item.selected {
  color: var(--accent);
}
.tb-strategy-item.selected::before {
  content: '\2713\00a0';
}
.tb-strategy-item:not(.selected)::before {
  content: '\00a0\00a0\00a0';
}

/* ── Draw Tiles (compact icon grid) ── */
#drawTiles {
  display: flex;
  gap: 2px;
  margin-left: 2px;
}
.draw-tile {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 26px;
  border: 1px solid transparent;
  border-radius: 3px;
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 14px;
  transition: background 0.1s, color 0.1s;
}
.draw-tile:hover {
  background: var(--bg-hover);
  color: var(--accent);
  border-color: var(--border);
}
.draw-tile.active {
  background: var(--accent-dim);
  color: var(--accent);
  border-color: var(--accent);
}

/* ═══════════════════════════════════════════════════════════════
   LAYOUT — Workspace Row (left toolbar + canvas)
   ═══════════════════════════════════════════════════════════════ */
#workspace-row {
  flex: 1;
  display: flex;
  flex-direction: row;
  min-height: 0;
  overflow: hidden;
}

/* ── Left Toolbar ── */
#leftToolbar {
  width: 148px;
  flex-shrink: 0;
  background: var(--bg-panel);
  border-right: 1px solid var(--border);
  overflow-y: auto;
  overflow-x: hidden;
  display: flex;
  flex-direction: column;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}
#leftToolbar::-webkit-scrollbar { width: 4px; }
#leftToolbar::-webkit-scrollbar-track { background: transparent; }
#leftToolbar::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

/* Category header */
.lft-cat {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 7px 8px 7px 10px;
  cursor: pointer;
  border-bottom: 1px solid var(--border-subtle);
  user-select: none;
  transition: background 0.1s;
}
.lft-cat:hover { background: var(--bg-hover); }
.lft-cat.expanded {
  background: var(--bg-secondary);
  border-bottom-color: transparent;
}
.lft-cat-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-secondary);
}
.lft-cat-arrow {
  flex-shrink: 0;
  color: var(--text-muted);
  transition: transform 0.15s ease, color 0.1s;
}
.lft-cat.expanded .lft-cat-arrow {
  transform: rotate(90deg);
}
/* Category has an active tool running inside it — not used; categories never highlight */

/* Category items container */
.lft-cat-items {
  overflow: hidden;
  max-height: 0;
  transition: max-height 0.18s ease;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-subtle);
}
.lft-cat-items.expanded { max-height: 800px; }

/* Individual item button */
.lft-item {
  display: block;
  width: 100%;
  padding: 5px 6px 5px 14px;
  border: none;
  border-radius: 0;
  background: transparent;
  color: var(--text-secondary);
  font-size: 11px;
  font-family: var(--font);
  text-align: left;
  cursor: pointer;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: background 0.08s, color 0.08s;
}
.lft-item:hover { background: var(--bg-hover); color: var(--text-primary); }
.lft-item.active { color: var(--accent); background: var(--accent-dim); }

/* Sub-items (circle/arc strategies) */
.lft-item-sub { padding-left: 22px; color: var(--text-muted); }
.lft-item-sub:hover { color: var(--text-primary); }

/* Group label within items */
.lft-group-label {
  padding: 5px 6px 2px 14px;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  user-select: none;
}

/* Sub-group header (collapsible, e.g. Circle, Arc) — styled identically to .lft-item */
.lft-sub-hdr {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 5px 6px 5px 14px;
  cursor: pointer;
  user-select: none;
  background: transparent;
  transition: background 0.08s, color 0.08s;
}
.lft-sub-hdr:hover { background: var(--bg-hover); }
.lft-sub-hdr.expanded { background: transparent; }
.lft-sub-label {
  font-size: 11px;
  font-weight: normal;
  text-transform: none;
  letter-spacing: normal;
  color: var(--text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.lft-sub-hdr:hover .lft-sub-label { color: var(--text-primary); }
.lft-sub-arrow {
  flex-shrink: 0;
  color: var(--text-muted);
  transition: transform 0.15s ease, color 0.1s;
  opacity: 0.6;
}
.lft-sub-hdr:hover .lft-sub-arrow { opacity: 1; }
.lft-sub-hdr.expanded .lft-sub-arrow {
  transform: rotate(90deg);
}

/* Active parent — a child tool is currently running */
.lft-sub-hdr.active-parent .lft-sub-label { color: var(--accent); }
.lft-sub-hdr.active-parent .lft-sub-arrow { color: var(--accent); opacity: 1; }

/* Sub-group items container */
.lft-sub-items {
  overflow: hidden;
  max-height: 0;
  transition: max-height 0.15s ease;
}
.lft-sub-items.expanded { max-height: 400px; }

/* Separator within item list */
.lft-sep {
  height: 1px;
  background: var(--border-subtle);
  margin: 3px 8px;
}

/* ── Canvas Area ── */
#canvasWrap {
  flex: 1;
  position: relative;
  overflow: hidden;
  background: var(--bg-canvas);
}
#cadCanvas {
  display: block;
  width: 100%;
  height: 100%;
  cursor: crosshair;
}
#cadCanvas.grab  { cursor: grab;     }
#cadCanvas.grabbing { cursor: grabbing; }

/* ── Command Bar ── */
#commandBar {
  display: flex;
  align-items: center;
  height: var(--cmdbar-h);
  background: var(--bg-input);
  border-top: 1px solid var(--border-subtle);
  padding: 0 8px;
  flex-shrink: 0;
}
#toolPrefix {
  background: rgba(30, 136, 229, 0.15);
  border: 1px solid rgba(30, 136, 229, 0.4);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 11px;
  padding: 1px 7px;
  border-radius: 3px;
  white-space: nowrap;
  margin-right: 6px;
  user-select: none;
  flex-shrink: 0;
}
#toolPrefix.hidden { display: none; }
#commandBar label {
  color: var(--text-muted);
  font-size: 12px;
  margin-right: 6px;
  white-space: nowrap;
}
#commandInput {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 12px;
  padding: 4px 0;
}
#commandInput::placeholder { color: var(--text-muted); }

/* ── Status Bar ── */
#statusBar {
  display: flex;
  align-items: center;
  height: var(--statusbar-h);
  background: var(--bg-toolbar);
  border-top: 1px solid var(--border-subtle);
  padding: 0 8px;
  gap: 4px;
  flex-shrink: 0;
}
.status-left {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 12px;
}
.status-right {
  display: flex;
  align-items: center;
  gap: 2px;
}
#statusMessage {
  font-size: 11px;
  color: var(--text-secondary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
#coordDisplay {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-muted);
  min-width: 180px;
  text-align: right;
}
.sb-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 2px 8px;
  height: 20px;
  border: 1px solid var(--border-subtle);
  border-radius: 2px;
  background: var(--bg-btn);
  color: var(--text-muted);
  cursor: pointer;
  font-size: 11px;
  font-family: var(--font);
  transition: background 0.1s, color 0.1s;
}
.sb-btn:hover {
  background: var(--bg-hover);
  border-color: var(--border);
  color: var(--text-primary);
}
.sb-btn.active {
  color: var(--accent);
  background: var(--accent-dim);
}

/* anchor variant — renders an <a> like an .sb-btn */
a.sb-link {
  text-decoration: none;
  line-height: 1;
}

/* ── Layer Widget ── */
.layer-label {
  font-size: 11px;
  color: var(--text-muted);
  white-space: nowrap;
  margin-right: 5px;
  user-select: none;
}
#layerWidget {
  position: relative;
  display: flex;
  align-items: center;
  margin-right: 4px;
}
.layer-label {
  font-size: 11px;
  color: var(--text-muted);
  white-space: nowrap;
  margin-right: 5px;
  user-select: none;
}
#layerSelector {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 2px 7px 2px 5px;
  height: 22px;
  border: 1px solid var(--border);
  border-radius: 3px;
  background: var(--bg-input);
  cursor: pointer;
  font-size: 11px;
  color: var(--text-primary);
  min-width: 120px;
  max-width: 170px;
  user-select: none;
  transition: border-color 0.1s;
}
#layerSelector:hover { border-color: var(--accent); }
.layer-swatch {
  width: 11px;
  height: 11px;
  border-radius: 2px;
  flex-shrink: 0;
  border: 1px solid rgba(255,255,255,0.2);
  display: inline-block;
}
#layerActiveName {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
#layerSelector svg { flex-shrink: 0; color: var(--text-muted); }

#layerDropdown {
  position: absolute;
  top: calc(100% + 4px);
  right: 0;
  width: 260px;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 4px;
  box-shadow: 0 8px 28px rgba(0,0,0,0.6);
  z-index: 600;
  overflow: hidden;
}
#layerDropdown.hidden { display: none; }

#layerPanelHeader {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 5px 8px 5px 10px;
  background: var(--bg-toolbar);
  border-bottom: 1px solid var(--border);
}
#layerPanelTitle {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
#btnNewLayer {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 3px;
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  transition: color 0.1s, border-color 0.1s, background 0.1s;
}
#btnNewLayer:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--accent-dim);
}

#layerList { max-height: 240px; overflow-y: auto; }

.layer-row {
  display: grid;
  grid-template-columns: 18px 16px 1fr 18px 22px;
  align-items: center;
  gap: 6px;
  padding: 4px 8px 4px 6px;
  cursor: default;
  font-size: 12px;
  color: var(--text-primary);
  border-left: 2px solid transparent;
  transition: background 0.08s;
}
.layer-row:hover { background: var(--bg-hover); }
.layer-row.active-layer {
  border-left-color: var(--accent);
  background: var(--accent-dim);
}

.layer-active-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  cursor: pointer;
  padding: 2px;
  border-radius: 2px;
}
.layer-active-icon:hover { background: var(--bg-active); }

.layer-row .layer-swatch {
  width: 14px;
  height: 14px;
  border-radius: 2px;
  cursor: pointer;
  flex-shrink: 0;
  transition: outline 0.1s;
}
.layer-row .layer-swatch:hover { outline: 2px solid var(--accent); outline-offset: 1px; }

.layer-row-name {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  cursor: pointer;
  padding: 1px 3px;
  border-radius: 2px;
}
.layer-row-name:hover { background: var(--bg-active); }

.layer-name-input {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--accent);
  border-radius: 2px;
  padding: 1px 4px;
  color: var(--text-primary);
  font-size: 12px;
  font-family: var(--font);
  outline: none;
  min-width: 0;
}

.layer-vis-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 1;
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 2px;
  border-radius: 2px;
  flex-shrink: 0;
  transition: color 0.1s;
}
.layer-vis-btn.layer-hidden { color: var(--text-secondary); }
.layer-vis-btn:hover { color: var(--accent); background: var(--accent-dim); }

.layer-delete-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 2px;
  border-radius: 2px;
  flex-shrink: 0;
  transition: opacity 0.1s, color 0.1s;
}
.layer-row:hover .layer-delete-btn { opacity: 1; }
.layer-delete-btn:hover { color: var(--error); background: rgba(239,83,80,0.12); }

#contextMenu {
  display: none;
  position: fixed;
  min-width: 180px;
  background: var(--bg-dropdown);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 4px 0;
  box-shadow: 0 8px 24px rgba(0,0,0,0.5);
  z-index: 500;
}
#contextMenu.visible { display: block; }
#contextMenu .menu-item { font-size: 12px; }

/* ── Properties Panel (floating) ── */
#propertiesPanel {
  display: none;
  position: fixed;
  width: 280px;
  max-height: 70vh;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 6px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.5);
  z-index: 300;
  overflow: hidden;
}
#propertiesPanel.visible { display: flex; flex-direction: column; }
.properties-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px;
  background: var(--bg-toolbar);
  border-bottom: 1px solid var(--border-subtle);
  cursor: move;
}
.properties-header h3 { font-size: 12px; font-weight: 600; }
#propsClose {
  background: none; border: none; color: var(--text-muted);
  cursor: pointer; font-size: 14px; line-height: 1;
}
#propsClose:hover { color: var(--error); }
#propsBody {
  padding: 8px 12px;
  overflow-y: auto;
  font-size: 12px;
}
.prop-group { margin-bottom: 8px; }
.prop-group-title {
  font-size: 11px;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 4px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.prop-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 3px 0;
}
.prop-label { color: var(--text-secondary); flex: 0 0 80px; }
.prop-value {
  flex: 1;
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: 3px;
  padding: 2px 6px;
  color: var(--text-primary);
  font-size: 12px;
  font-family: var(--font-mono);
  outline: none;
}
.prop-value:focus { border-color: var(--accent); }
select.prop-value {
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M0 0l5 6 5-6z' fill='%23888'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 6px center;
  background-size: 8px;
  padding-right: 20px;
  cursor: pointer;
}
input[type="color"].prop-color-input {
  padding: 1px 2px;
  height: 24px;
  width: 36px;
  border: 1px solid var(--border-subtle);
  border-radius: 3px;
  background: var(--bg-input);
  cursor: pointer;
}
input[type="color"].prop-color-input:disabled { opacity: 0.4; cursor: default; }
.prop-value[readonly], .prop-value:read-only {
  background: transparent;
  border-color: transparent;
  color: var(--text-muted);
  cursor: default;
}

/* ── Snap Indicator ── */
.snap-indicator {
  position: absolute;
  pointer-events: none;
  z-index: 50;
}

/* ── Loading Overlay ── */
#loadingOverlay {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-primary);
  z-index: 900;
  transition: opacity 0.3s;
}
#loadingOverlay.hidden {
  opacity: 0;
  pointer-events: none;
}
.loading-text {
  font-size: 16px;
  color: var(--text-secondary);
  letter-spacing: 1px;
}
.loading-text .accent { color: var(--accent); font-weight: 600; }

/* ── Connection Status ── */
#connectionStatus {
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 2px;
}
#connectionStatus.connected { color: var(--success); }
#connectionStatus.disconnected { color: var(--error); }
#connectionStatus.connecting { color: var(--warning); }

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover { background: var(--bg-hover); }

/* ── Utility ── */
.hidden { display: none !important; }

/* ── View Tabs (Workspace / Print Layout) in command bar ── */
#viewTabs {
  display: flex;
  align-items: stretch;
  border-left: 1px solid var(--border-subtle);
  padding-left: 8px;
  margin-left: 8px;
  flex-shrink: 0;
  gap: 2px;
}
.view-tab {
  padding: 0 12px;
  background: transparent;
  border: none;
  border-top: 2px solid transparent;
  color: var(--text-secondary);
  font-size: 11px;
  font-family: var(--font);
  cursor: pointer;
  white-space: nowrap;
  transition: color 0.1s, border-color 0.1s;
}
.view-tab:hover { color: var(--text-primary); }
.view-tab.active {
  color: var(--accent);
  border-top-color: var(--accent);
  font-weight: 600;
}

/* ── Print Layout Panel (fills canvasWrap, replaces old modal overlay) ── */
#printLayoutPanel {
  display: none;
  flex-direction: column;
  position: absolute;
  inset: 0;
  background: var(--bg-primary);
  z-index: 10;
}
#printLayoutPanel.active { display: flex; }
#printLayoutToolbar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 5px 10px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  background: var(--bg-panel);
  flex-wrap: wrap;
}
.print-tb-label {
  font-size: 11px;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 5px;
}
#printPaperSize {
  background: var(--bg-primary);
  color: var(--text-primary);
  border: 1px solid var(--border);
  border-radius: 2px;
  font-size: 11px;
  padding: 2px 4px;
  cursor: pointer;
}
#printLayoutArea {
  flex: 1;
  overflow: auto;
  background: #505050;
  min-height: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px;
}
#printPaper {
  position: relative;
  background: #ffffff;
  flex-shrink: 0;
  box-shadow: 4px 4px 20px rgba(0,0,0,0.55), 0 0 0 1px rgba(0,0,0,0.2);
}
/* ── Viewport (transparent canvas sitting on the white paper) ── */
.print-viewport {
  position: absolute;
  overflow: hidden;
  border: 1px solid rgba(0,0,0,0.15);
  box-sizing: border-box;
  cursor: default;
}
.print-viewport canvas {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  pointer-events: none;
}
.print-viewport.vp-selected {
  border: 2px solid var(--accent);
  cursor: grab;
}
.print-viewport.vp-selected:active { cursor: grabbing; }
/* ── Resize handles (visible only when viewport is selected) ── */
.vp-handle {
  position: absolute;
  width: 8px;
  height: 8px;
  background: var(--accent);
  border: 1px solid var(--bg-primary);
  border-radius: 1px;
  opacity: 0;
  pointer-events: none;
  z-index: 20;
  transition: opacity 0.1s;
}
.print-viewport.vp-selected .vp-handle { opacity: 1; pointer-events: auto; }
.vp-handle-nw { top: -4px; left: -4px;              cursor: nwse-resize; }
.vp-handle-n  { top: -4px; left: calc(50% - 4px);   cursor: ns-resize;   }
.vp-handle-ne { top: -4px; right: -4px;              cursor: nesw-resize; }
.vp-handle-e  { top: calc(50% - 4px); right: -4px;  cursor: ew-resize;   }
.vp-handle-se { bottom: -4px; right: -4px;           cursor: nwse-resize; }
.vp-handle-s  { bottom: -4px; left: calc(50% - 4px);cursor: ns-resize;   }
.vp-handle-sw { bottom: -4px; left: -4px;            cursor: nesw-resize; }
.vp-handle-w  { top: calc(50% - 4px); left: -4px;   cursor: ew-resize;   }
/* ── In-page print output (hidden on screen, shown during printing) ── */
#printOutputPage {
  display: none;
}
@media print {
  body > *:not(#printOutputPage) { display: none !important; }
  #printOutputPage {
    display: block !important;
    position: fixed;
    inset: 0;
    margin: 0;
    padding: 0;
    background: #fff;
  }
  #printOutputPage img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: contain;
  }
  @page { margin: 0; }
}

.flex-gap-2 { display: flex; gap: 2px; }

/* ── Hidden inputs (replacing inline styles to satisfy CSP style-src 'self') ── */
#layerColorPicker {
  position: fixed;
  opacity: 0;
  pointer-events: none;
  top: 0;
  left: 0;
}
#fileOpenInput { display: none; }

/* ═══════════════════════════════════════════════════════════════
   AD SIDEBAR — 320 px column, isolated iframe for ad network
   ═══════════════════════════════════════════════════════════════ */
#ad-sidebar {
  width: 320px;
  flex-shrink: 0;
  height: 100vh;
  background: var(--bg-primary);
  border-left: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  padding-top: 8px;
  overflow: hidden;
}

#ad-sidebar iframe {
  /* Standard ad unit: 300×600 half-page or 300×250 medium rectangle */
  width: 300px;
  height: 600px;
  border: none;
  display: block;
  background: transparent;
}

/* ── Responsive: sidebar drops below the canvas on narrow screens ── */
@media (max-width: 899px) {
  #app-shell {
    flex-direction: column;
  }

  #app {
    /* Leave room for the sidebar below */
    height: calc(100vh - 140px);
    min-height: 400px;
  }

  #ad-sidebar {
    width: 100%;
    height: 140px;
    border-left: none;
    border-top: 1px solid var(--border-subtle);
    flex-direction: row;
    justify-content: center;
    padding-top: 0;
    padding: 4px;
  }

  #ad-sidebar iframe {
    /* Fits a 320×100 leaderboard or similar landscape unit */
    width: 320px;
    height: 100px;
  }
}

/* Hide sidebar entirely during @media print */
@media print {
  #ad-sidebar { display: none !important; }
}