:root {
  --bg-canvas: #2D2D3A;
  --bg-chrome: #141418;
  --bg-panel: #1E1E24;
  --border: #2A2A35;
  --border-divider: 0.5px solid rgba(255, 255, 255, 0.07);  /* A5.3: soft structural separators */
  --active: #3B3B52;
  --accent: #7B68EE;
  --accent2: #4A9EFF;
  --snap: #FFD700;
  --grip: #4169E1;
  --grip-active: #FF4500;
  --text: #E8E8F0;
  --text-dim: #8888AA;
  --cli-bg: #0F0F14;
  --cli-text: #C8C8D8;
  --cli-prompt: #7B68EE;
  --status: #111116;
  --status-on: #4A9EFF;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  overflow: hidden;
  background: var(--bg-canvas);
  color: var(--text);
  font-family: 'Segoe UI', 'IBM Plex Sans', system-ui, sans-serif;
  font-size: 12px;
  user-select: none;
}

#app {
  display: grid;
  grid-template-rows: 38px 98px 1fr 90px 22px 24px;
  height: 100vh;
}

/* ===== Top chrome (logo + tabs + global controls, single row) ===== */
#top-chrome {
  display: flex;
  align-items: flex-end;
  padding: 0 8px;
  gap: 8px;
  background: var(--bg-chrome);
  border-bottom: var(--border-divider);   /* A5.3: title/chrome → ribbon */
  height: 38px;
}
.tb-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 12px 0 6px;
  background: transparent;
  border: 1px solid transparent;
  cursor: pointer;
  border-radius: 4px 4px 0 0;
  height: 30px;
  align-self: flex-end;
  margin-bottom: 0;
}
.tb-logo:hover { background: var(--active); border-color: var(--accent); }
.tb-logo-img {
  filter: brightness(1.8) drop-shadow(0 0 4px rgba(139, 92, 246, 0.5));
}
.tb-logo-text {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 3px;
  color: #E8E8F0;
}
.tb-spacer { flex: 1; }
.tb-global {
  display: flex;
  gap: 4px;
  align-items: center;
  align-self: center;
  margin-bottom: 4px;
}

/* ===== Ribbon tabs — sit inline with logo ===== */
#ribbon-tabs {
  display: flex;
  gap: 2px;
  align-items: flex-end;
  height: 100%;
}
.ribbon-tab {
  background: transparent;
  color: var(--text-dim);
  border: 1px solid transparent;
  border-bottom: none;
  padding: 6px 18px;
  font-family: inherit;
  font-size: 12px;
  letter-spacing: 0.5px;
  cursor: pointer;
  border-radius: 4px 4px 0 0;
  height: 28px;
}
.ribbon-tab:hover { color: var(--text); background: var(--bg-panel); }
.ribbon-tab.active {
  color: var(--accent2);
  background: var(--bg-panel);
  border-color: var(--border);
  border-bottom-color: var(--bg-panel);
  position: relative;
  top: 1px;
}

/* ===== Ribbon panel ===== */
#ribbon-panel {
  background: var(--bg-panel);
  border-bottom: var(--border-divider);   /* A5.3: ribbon → workspace */
  overflow: hidden;
  position: relative;
}
.ribbon-content {
  display: flex;
  align-items: stretch;
  padding: 0;
  height: 100%;
  overflow-x: auto;
}
.ribbon-content.hidden { display: none; }

/* Named panel — group of tools with a label footer and side separator */
.ribbon-panel-group {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  border-right: var(--border-divider);   /* A5.3: ribbon group separator */
  padding: 4px 0;   /* A5.2.3: +4px vertical (was 0) */
  min-width: 0;
}
.ribbon-panel-group:last-child { border-right: none; }

.ribbon-rows {
  display: grid;
  grid-auto-flow: column;
  grid-template-rows: 1fr 1fr;
  gap: 2px 4px;
  padding: 6px 10px 2px;
  flex: 1;
  align-items: center;
  justify-content: start;
}

.ribbon-panel-label {
  font-size: 10px;
  letter-spacing: 1px;
  color: var(--text-dim);
  text-transform: uppercase;
  text-align: center;
  padding: 2px 6px 4px;
  border-top: 1px solid rgba(42, 42, 53, 0.5);
  margin-top: auto;
}

.ribbon-group { display: flex; gap: 0; align-items: center; }

.tb-row {
  display: flex;
  align-items: center;
  padding: 0 6px;
  gap: 3px;
  height: 36px;
}

.tb-group { display: flex; gap: 2px; align-items: center; }
.tb-sep { width: 1px; height: 24px; background: var(--border); margin: 0 4px; }

.tb-btn {
  background: transparent;
  color: var(--text);
  border: 1px solid transparent;
  padding: 5px 8px;   /* A5.2.1: +3px vertical (was 2px) */
  font-size: 12px;
  font-family: inherit;
  cursor: pointer;
  border-radius: 4px;
  display: flex;
  align-items: center;
  gap: 4px;
  white-space: nowrap;
  /* A5.2.1: +3px vertical padding; height grows naturally (fixed height
     removed per spec so the padding increase is visible). */
  min-height: 32px;
}
.tb-btn .tb-icon svg { width: 19px; height: 19px; }
.tb-btn:hover {
  background: rgba(139, 92, 246, 0.18);
  border-color: var(--accent);
  color: #E8E8F0;
}
.tb-btn:active { background: var(--accent); color: white; }

.tb-icon { display: inline-flex; align-items: center; }
.tb-icon svg { display: block; }
.tb-lbl { font-size: 12px; letter-spacing: 0.3px; }

.tb-label { color: var(--text-dim); margin: 0 4px 0 2px; font-size: 11px; }
.tb-select {
  background: var(--bg-panel);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 2px 4px;
  font-family: inherit;
  font-size: 11px;
  min-width: 100px;
}

/* ===== Ruler ===== */
.ruler {
  height: 18px;
  background: var(--bg-chrome);
  border-bottom: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}

/* ===== Main area ===== */
#main {
  display: grid;
  grid-template-columns: auto 4px minmax(0, 1fr) max-content;
  overflow: hidden;
}

#panel-left { width: 240px; flex-shrink: 0; }
.panel-resize-h {
  width: 4px;
  cursor: col-resize;
  background: var(--border);
  flex-shrink: 0;
  transition: background 0.1s;
}
.panel-resize-h:hover, .panel-resize-h.dragging { background: var(--accent); }

/* Left panel: Project Browser v2 */
.pb-proj-header {
  padding: 10px 12px 8px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-chrome);
  position: relative;
}
.pb-proj-name {
  font-weight: 600;
  font-size: 12px;
  color: #E8E8F0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  padding-right: 24px;
}
.pb-proj-number {
  font-size: 10px;
  color: #8888AA;
  margin-top: 2px;
  font-family: monospace;
}
.pb-proj-menu {
  position: absolute;
  top: 8px;
  right: 8px;
  background: transparent;
  color: #8888AA;
  border: none;
  cursor: pointer;
  font-size: 14px;
  padding: 2px 6px;
  border-radius: 4px;
}
.pb-proj-menu:hover { color: #E8E8F0; background: var(--active); }
.pb-filter-wrap { padding: 6px 8px; border-bottom: 1px solid var(--border); }
.pb-filter-input {
  width: 100%;
  background: #0F0F13;
  color: #E8E8F0;
  border: 1px solid var(--border);
  padding: 4px 6px;
  font-size: 11px;
  border-radius: 4px;
  box-sizing: border-box;
}
.pb-section { padding: 6px 0 2px; border-bottom: 1px dotted rgba(42,42,53,0.6); }
.pb-section:last-child { border-bottom: none; }
.pb-section-hdr {
  font-size: 9px;
  letter-spacing: 1px;
  color: #8888AA;
  padding: 2px 10px 4px;
  text-transform: uppercase;
  font-weight: 600;
}
.pb-divider {
  padding: 6px 10px;
  font-size: 9px;
  color: #8888AA;
  letter-spacing: 1px;
  background: #15151A;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  text-transform: uppercase;
  text-align: center;
}
.pb-tree-node {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;   /* A5.2.2: +3px vertical (was 3px) — left panel tree rows */
  font-size: 11px;
  color: #E8E8F0;
  cursor: pointer;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.pb-tree-node:hover { background: var(--active); }
.pb-tree-node.active {
  background: #2E2A40;
  color: var(--accent2);
  font-weight: 600;
}
.pb-root { font-weight: 500; }
.pb-sub { padding-left: 22px; font-size: 10.5px; color: #C8C8D4; }
.pb-ico { font-size: 10px; opacity: 0.8; width: 14px; text-align: center; }
.pb-count { color: #8888AA; font-size: 10px; margin-left: auto; padding-left: 6px; }
.pb-tree-children { display: none; }
.pb-tree-children.open { display: block; }
.pb-disc-row {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px 12px;
  font-size: 11px;
  cursor: pointer;
  color: #C8C8D4;
}
.pb-disc-row:hover { background: var(--active); }
.pb-disc-row.active { color: #E8E8F0; }
.pb-disc-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: #8888AA;
}
.pb-disc-row.active .pb-disc-dot { background: #8B5CF6; }
.pb-disc-code {
  display: inline-block;
  min-width: 22px;
  text-align: center;
  background: #2A2A35;
  padding: 1px 4px;
  border-radius: 4px;
  font-family: monospace;
  font-size: 10px;
  color: #E8E8F0;
}
.pb-disc-name { flex: 1; }
.pb-disc-count { color: #8888AA; font-size: 10px; }
.pb-btn-sub {
  width: calc(100% - 24px);
  margin: 4px 12px 2px;
  background: transparent;
  color: #8B5CF6;
  border: 1px dashed #2A2A35;
  padding: 3px 6px;
  font-size: 10px;
  cursor: pointer;
  border-radius: 4px;
}
.pb-btn-sub:hover { background: var(--active); border-color: #8B5CF6; }

#panel-left {
  background: var(--bg-panel);
  border-right: var(--border-divider);   /* A5.3: left panel → canvas */
  overflow-y: auto;
  min-width: 0;
}

.pb-toolbar {
  padding: 4px 6px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-chrome);
}
.pb-btn {
  width: 100%;
  background: var(--bg-panel);
  color: var(--accent2);
  border: 1px solid var(--border);
  padding: 3px 6px;
  font-size: 10px;
  letter-spacing: 0.5px;
  cursor: pointer;
  border-radius: 4px;
  font-family: inherit;
}
.pb-btn:hover { background: var(--active); border-color: var(--accent); color: var(--text); }

.tree-node {
  padding: 3px 8px;
  font-size: 11px;
  cursor: pointer;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.tree-node:hover { background: var(--active); }
.tree-node.active { color: var(--accent2); font-weight: bold; }
.tree-icon { font-size: 10px; margin-right: 4px; }
.tree-children { padding-left: 16px; display: none; }
.tree-children.open { display: block; }

/* Left toolbar */
#toolbar-left {
  background: var(--bg-chrome);
  border-right: var(--border-divider);   /* A5.3: left toolbar → workspace */
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 4px 0;
  gap: 2px;
}
.tbl-btn {
  width: 28px;
  height: 28px;
  background: var(--bg-panel);
  color: var(--text);
  border: 1px solid var(--border);
  cursor: pointer;
  border-radius: 4px;
  font-size: 14px;
  font-family: inherit;
  padding: 0;
}
.tbl-btn:hover { background: var(--active); border-color: var(--accent); }
.tbl-sep { height: 1px; width: 24px; background: var(--border); margin: 4px 0; }

/* Canvas */
#canvas-wrap {
  position: relative;
  overflow: hidden;
  background: var(--bg-canvas);
}
#canvas {
  display: block;
  width: 100%;
  height: 100%;
  cursor: none;
}

/* ===== Right panels ===== */
#panel-right {
  background: var(--bg-panel);
  border-left: var(--border-divider);   /* A5.3: canvas → right panel */
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  max-width: 260px;
  min-width: 200px;
  width: 240px;
}
.panel { border-bottom: var(--border-divider); }   /* A5.3: right-panel section dividers */
.panel-header {
  background: var(--bg-chrome);
  padding: 4px 8px;
  font-size: 10px;
  letter-spacing: 1px;
  color: var(--text-dim);
  text-transform: uppercase;
  border-bottom: 1px solid var(--border);
}
.panel-body { padding: 6px 8px; }
.prop-row {
  display: flex;
  justify-content: space-between;
  padding: 6px 0;   /* A5.2.2: +3px vertical (was 3px) */
  font-size: 11px;
}
.prop-k { color: var(--text-dim); }
.prop-v { color: var(--text); font-family: 'Consolas', 'JetBrains Mono', monospace; }

.panel-btn {
  width: 100%;
  background: var(--bg-chrome);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 4px;
  cursor: pointer;
  margin-top: 6px;
  font-family: inherit;
  font-size: 11px;
}
.panel-btn:hover { background: var(--active); }

.panel-input {
  width: 100%;
  background: var(--bg-chrome);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 4px 6px;
  font-family: inherit;
  font-size: 11px;
  outline: none;
  margin: 2px 0;
}
.panel-input:focus { border-color: var(--accent); }

/* Layer rows */
.layer-row {
  display: grid;
  grid-template-columns: 14px 14px minmax(40px, 1fr) 70px 36px 16px;
  gap: 4px;
  align-items: center;
  padding: 3px 0;
  font-size: 10px;
  cursor: pointer;
  overflow: hidden;
}
.layer-name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.layer-lt, .layer-lw {
  font-family: 'Consolas', 'JetBrains Mono', monospace;
  color: var(--text-dim);
  cursor: pointer;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.layer-lt:hover, .layer-lw:hover { color: var(--accent2); }
.layer-row.current { color: var(--accent2); font-weight: bold; }
.layer-swatch {
  width: 12px; height: 12px;
  border: 1px solid var(--border);
  cursor: pointer;
}
.layer-vis {
  cursor: pointer;
  color: var(--text-dim);
  text-align: center;
  font-size: 11px;
}
.layer-vis.on { color: var(--accent2); }

/* ===== Families panel ===== */
#families-panel { min-height: 150px; }
#families-list {
  max-height: 300px;
  overflow-y: auto;
}
.fam-group-header {
  font-size: 10px;
  color: var(--text-dim);
  padding: 4px 0 2px;
  cursor: pointer;
  letter-spacing: 0.5px;
}
.fam-group-header:hover { color: var(--accent2); }
.fam-item {
  padding: 6px 8px;   /* A5.2.2: +3px vertical (was 3px) — library/list items */
  font-size: 11px;
  cursor: pointer;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.fam-item:hover { background: var(--active); color: var(--accent2); }
.fam-group-body { padding-left: 4px; }
.fam-group-body.collapsed { display: none; }

/* ===== CLI ===== */
#cli-container {
  background: var(--cli-bg);
  border-top: var(--border-divider);   /* A5.3: above CLI area */
  display: flex;
  flex-direction: column;
  font-family: 'Consolas', 'JetBrains Mono', monospace;
  font-size: 12px;
  overflow: hidden;
}
#cli-history {
  flex: 1;
  overflow-y: auto;
  padding: 4px 8px;
  color: var(--cli-text);
  white-space: pre-wrap;
  line-height: 1.35;
  /* CLI log is reference text (errors, diagnostics, inquiry output) — make it
     selectable/copyable even though the app globally disables text selection
     for canvas drag cleanliness. */
  user-select: text;
  -webkit-user-select: text;
  cursor: text;
}
.cli-line { }
.cli-line.prompt { color: var(--cli-prompt); }
.cli-line.echo { color: var(--text); }
.cli-line.err { color: #ff5555; }
.cli-line.info { color: var(--text-dim); }

#cli-input-row {
  display: flex;
  align-items: center;
  padding: 3px 8px;
  border-top: 1px solid var(--border);
  background: var(--cli-bg);
}
#cli-prompt {
  color: var(--cli-prompt);
  margin-right: 6px;
  white-space: nowrap;
}
#cli-input {
  flex: 1;
  background: transparent;
  color: var(--cli-text);
  border: none;
  outline: none;
  font-family: inherit;
  font-size: 12px;
}

/* ===== Layout tabs ===== */
#layout-tabs {
  display: flex;
  background: var(--bg-chrome);
  border-top: var(--border-divider);      /* A5.3 */
  border-bottom: var(--border-divider);   /* A5.3 */
  padding: 0 4px;
  gap: 2px;
  align-items: center;
  height: 22px;
}
.layout-tab {
  background: var(--bg-panel);
  color: var(--text-dim);
  border: 1px solid var(--border);
  border-bottom: none;
  padding: 2px 12px;
  font-family: inherit;
  font-size: 10px;
  cursor: pointer;
  border-radius: 4px 4px 0 0;
}
.layout-tab:hover { color: var(--text); }
.layout-tab.active { background: var(--bg-canvas); color: var(--text); border-color: var(--accent); }
.layout-tab-add { color: var(--text-dim); font-size: 14px; padding: 2px 8px; }
.layout-tab-add:hover { color: var(--accent); }

/* ===== Status bar ===== */
#status-bar {
  background: var(--status);
  border-top: var(--border-divider);   /* A5.3: above status bar */
  display: flex;
  align-items: center;
  padding: 0 8px;
  gap: 6px;
  font-family: 'Consolas', 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--text-dim);
}
#status-coords { min-width: 180px; color: var(--text); }
.sb-sep { width: 1px; height: 16px; background: var(--border); }
.sb-toggle {
  background: transparent;
  color: var(--text-dim);
  border: 1px solid transparent;
  padding: 2px 8px;
  cursor: pointer;
  font-family: inherit;
  font-size: 10px;
  letter-spacing: 0.5px;
  border-radius: 4px;
}
.sb-toggle:hover { background: var(--bg-panel); }
.sb-toggle.on {
  color: var(--status-on);
  border-color: var(--status-on);
}
#status-mode { margin-left: auto; color: var(--text); }

.sb-gridmode { display: inline-flex; gap: 1px; margin-left: 2px; }
.sb-gm-btn {
  background: transparent; border: 1px solid transparent;
  color: var(--text-dim); padding: 1px 4px; cursor: pointer;
  font-size: 12px; border-radius: 4px; font-family: inherit;
}
.sb-gm-btn:hover { background: var(--bg-panel); }
.sb-gm-btn.on { color: var(--status-on); border-color: var(--status-on); }

/* Dynamic input field (floats near cursor) */
.dyn-input-wrap {
  position: fixed;
  z-index: 1500;
  display: flex;
  gap: 2px;
  background: var(--bg-chrome);
  border: 1px solid var(--border);
  padding: 2px;
  border-radius: 4px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.4);
  font-family: 'Consolas', monospace;
  font-size: 11px;
  pointer-events: auto;
}
.dyn-input-wrap.hidden { display: none; }
.dyn-input-label {
  padding: 2px 4px;
  color: var(--text-dim);
  white-space: nowrap;
}
.dyn-input {
  background: var(--bg-canvas);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 1px 4px;
  font-family: inherit;
  font-size: 11px;
  width: 70px;
  outline: none;
}
.dyn-input:focus, .dyn-input.active { border-color: var(--accent); background: #2A2A3A; }

/* ===== Context menu ===== */
.ctx-menu {
  position: fixed;
  min-width: 160px;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  box-shadow: 0 4px 12px rgba(0,0,0,0.5);
  z-index: 1000;
  padding: 4px 0;
  font-family: 'Segoe UI', sans-serif;
  font-size: 11px;
  color: var(--text);
}
.ctx-menu.hidden { display: none; }
.ctx-item {
  padding: 5px 14px;
  cursor: pointer;
  white-space: nowrap;
}
.ctx-item:hover { background: var(--active); color: var(--accent2); }
.ctx-item.disabled { color: var(--text-dim); cursor: default; }
.ctx-item.disabled:hover { background: transparent; color: var(--text-dim); }
.ctx-sep { height: 1px; background: var(--border); margin: 4px 0; }
.ctx-hotkey {
  float: right;
  color: var(--text-dim);
  margin-left: 24px;
}

/* ===== Modals ===== */
.modal {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 4000;
}
.modal.hidden { display: none; }
.cmd-palette-box { display: flex; }
.cmd-palette-box.hidden { display: none !important; }
.modal-content {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 4px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.6);
  min-width: 300px;
  max-width: 90vw;
  max-height: 80vh;
  overflow: auto;
}
.modal-sm { min-width: 280px; max-width: 400px; }
.modal-header {
  background: var(--bg-chrome);
  padding: 8px 12px;
  font-size: 12px;
  font-weight: bold;
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.modal-close {
  cursor: pointer;
  color: var(--text-dim);
  font-size: 14px;
}
.modal-close:hover { color: #ff5555; }
.modal-body { padding: 8px 12px; }


/* User Preferences tabs */
.prefs-tabs { display: flex; border-bottom: 1px solid var(--border); margin-bottom: 12px; }
.prefs-tab {
  flex: 1; background: transparent; color: var(--text-dim);
  border: none; padding: 7px 10px; cursor: pointer;
  border-bottom: 2px solid transparent;
  font-family: inherit; font-size: 11px; letter-spacing: 0.5px;
}
.prefs-tab.active { color: var(--accent); border-bottom-color: var(--accent); }
.prefs-tab:hover { color: var(--text); }
.prefs-panel { display: none; }
.prefs-panel.active { display: block; }

/* Hatch picker */
.hatch-dialog {
  display: grid;
  grid-template-columns: 1fr 310px;
  gap: 12px;
  padding: 12px;
}
.hatch-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(84px, 1fr));
  gap: 6px;
  max-height: 440px;
  overflow-y: auto;
  padding: 2px;
}
.hatch-tile {
  background: var(--bg-chrome);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 4px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  color: var(--text-dim);
  font-size: 9px;
  letter-spacing: 0.3px;
}
.hatch-tile:hover { border-color: var(--accent); background: var(--active); color: var(--text); }
.hatch-tile.selected {
  border-color: var(--accent);
  background: rgba(139, 92, 246, 0.15);
  color: var(--accent2);
}
.hatch-tile canvas {
  width: 72px;
  height: 72px;
  background: var(--bg-canvas);
  border-radius: 4px;
}
.hatch-preview-pane {
  border-left: 1px solid var(--border);
  padding-left: 12px;
  display: flex;
  flex-direction: column;
}
.hatch-preview-title {
  font-size: 10px;
  letter-spacing: 1px;
  color: var(--text-dim);
  text-transform: uppercase;
  margin-bottom: 6px;
}
#hatch-preview-canvas {
  background: var(--bg-canvas);
  border: 1px solid var(--border);
  border-radius: 4px;
  width: 100%;
  height: 240px;
}
.hatch-selected-name {
  text-align: center;
  font-family: monospace;
  color: var(--accent2);
  font-size: 14px;
  padding: 8px 0;
}

/* Layer Manager modal */
.lm-tabs { display: flex; border-bottom: 1px solid var(--border); background: var(--bg-chrome); }
.lm-tab {
  background: transparent; color: var(--text-dim);
  border: none; padding: 8px 14px; cursor: pointer;
  border-bottom: 2px solid transparent; font-family: inherit; font-size: 11px;
  letter-spacing: 0.5px; text-transform: uppercase;
}
.lm-tab.active { color: var(--accent); border-bottom-color: var(--accent); background: var(--bg-panel); }
.lm-tab:hover { color: var(--text); }

.lm-panel { display: none; padding: 10px; }
.lm-panel.active { display: block; }

.lm-toolbar {
  display: flex; gap: 4px; align-items: center;
  padding: 6px 10px; border-bottom: 1px solid var(--border);
  background: var(--bg-chrome); margin: -10px -10px 8px;
}

.lm-header-row, .lm-layer-row {
  display: grid;
  grid-template-columns: 32px 32px 32px 40px 1.5fr 1fr 0.8fr 0.6fr 1.5fr;
  gap: 4px;
  align-items: center;
  padding: 4px 10px;
  font-size: 11px;
}
.lm-header-row {
  background: var(--bg-chrome);
  color: var(--text-dim);
  font-size: 10px;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  border-bottom: 1px solid var(--border);
}

.lm-list { max-height: 420px; overflow-y: auto; }
.lm-layer-row { border-bottom: 1px solid rgba(42, 42, 53, 0.4); cursor: pointer; }
.lm-layer-row:hover { background: var(--active); }
.lm-layer-row.current { background: rgba(74, 158, 255, 0.1); color: var(--accent2); }

.lm-swatch { width: 16px; height: 16px; border: 1px solid var(--border); cursor: pointer; border-radius: 4px; }
.lm-toggle { cursor: pointer; text-align: center; color: var(--text-dim); font-size: 13px; }
.lm-toggle.on { color: var(--accent2); }
.lm-toggle.locked { color: #FF8855; }
.lm-toggle.print { color: #88DD88; }
.lm-layer-row input[type="text"],
.lm-layer-row input[type="number"] {
  background: transparent; border: 1px solid transparent; color: inherit;
  font-family: inherit; font-size: 11px; padding: 2px 4px; width: 100%;
}
.lm-layer-row input[type="text"]:focus,
.lm-layer-row input[type="number"]:focus {
  background: var(--bg-chrome); border-color: var(--accent);
}
.lm-layer-row select {
  background: var(--bg-chrome); color: var(--text);
  border: 1px solid var(--border); font-size: 11px; padding: 2px; width: 100%;
}

.lm-state-row {
  display: flex; gap: 8px; align-items: center;
  padding: 6px 10px; border-bottom: 1px solid rgba(42, 42, 53, 0.4);
}
.lm-state-row .lm-state-name { flex: 1; color: var(--text); }
.lm-state-row button { padding: 3px 10px; font-size: 10px; }

.pp-lbl {
  display: block;
  color: var(--text-dim);
  font-size: 11px;
  margin-top: 8px;
  margin-bottom: 2px;
}

.cb-tabs { display: flex; border-bottom: 1px solid var(--border); margin-bottom: 8px; }
.cb-tab {
  flex: 1;
  background: transparent; color: var(--text-dim);
  border: none; padding: 6px 12px; cursor: pointer;
  border-bottom: 2px solid transparent; font-family: inherit; font-size: 12px;
}
.cb-tab.active { color: var(--accent); border-bottom-color: var(--accent); }
.cb-tab:hover { color: var(--text); }
.cb-desc {
  color: var(--text-dim); font-size: 11px;
  background: var(--bg-chrome); padding: 6px 8px;
  border-radius: 4px; line-height: 1.4;
}

.osnap-row {
  display: block;
  padding: 4px 0;
  color: var(--text);
  font-size: 12px;
  cursor: pointer;
}
.osnap-row input { margin-right: 8px; }
.osnap-row:hover { color: var(--accent2); }

.calc-result {
  font-family: 'Consolas', monospace;
  font-size: 16px;
  color: var(--accent2);
  padding: 8px 0;
  min-height: 28px;
}
.calc-history {
  font-family: 'Consolas', monospace;
  font-size: 11px;
  color: var(--text-dim);
  max-height: 120px;
  overflow-y: auto;
}

/* ══════════════════════════════════════════════════════
   TOOLBAR LOGO
   ══════════════════════════════════════════════════════ */

.tb-logo {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 0 6px 0 4px;
  user-select: none;
  cursor: default;
}

.tb-logo-img {
  width: 21px;
  height: 21px;
  object-fit: contain;
  flex-shrink: 0;
  filter: brightness(1.8) drop-shadow(0 0 6px rgba(139, 92, 246, 0.5));
}

.tb-logo-text {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 3px;
  color: #E8E8F0;
  line-height: 1;
}

/* ══════════════════════════════════════════════════════
   SPLASH SCREEN
   ══════════════════════════════════════════════════════ */

#forms2d-splash {
  position: fixed;
  inset: 0;
  z-index: 99999;
  background: #1A1A22;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-end;
  padding-bottom: 80px;
  font-family: 'Segoe UI', system-ui, sans-serif;
  overflow: hidden;
  transition: opacity 0.65s cubic-bezier(0.4, 0, 0.2, 1),
              visibility 0.65s cubic-bezier(0.4, 0, 0.2, 1);
}

#forms2d-splash.hiding {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

#forms2d-splash.hidden {
  display: none;
}

#splash-bg {
  position: absolute;
  inset: 0;
  background-image: url('../visual/forms2dsplash.png');
  background-size: cover;
  background-position: center center;
  opacity: 1;
  filter: brightness(1.15) saturate(1.1);
  z-index: 0;
}

.splash-content {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  animation: splashReveal 0.9s cubic-bezier(0.16, 1, 0.3, 1) 0.1s both;
}

@keyframes splashReveal {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0);    }
}

.splash-logo-mark {
  width: 88px;
  height: 88px;
  object-fit: contain;
  margin-bottom: 22px;
  filter: drop-shadow(0 0 20px rgba(139, 92, 246, 0.35));
  animation: markPulse 2.5s ease-in-out infinite alternate;
}

@keyframes markPulse {
  from { filter: drop-shadow(0 0 12px rgba(139, 92, 246, 0.25)); }
  to   { filter: drop-shadow(0 0 32px rgba(139, 92, 246, 0.6));  }
}

.splash-wordmark {
  font-size: 44px;
  font-weight: 800;
  letter-spacing: 10px;
  text-transform: uppercase;
  color: transparent;
  background: linear-gradient(
    145deg,
    #B0B0C8 0%,
    #FFFFFF 25%,
    #C8C8E0 55%,
    #E8E8F8 80%,
    #9898B8 100%
  );
  -webkit-background-clip: text;
  background-clip: text;
  line-height: 1;
  margin-bottom: 8px;
  user-select: none;
}

.splash-subtitle {
  font-size: 10px;
  font-weight: 400;
  letter-spacing: 5px;
  text-transform: uppercase;
  color: #44445A;
  margin-bottom: 52px;
  display: flex;
  align-items: center;
  gap: 12px;
  user-select: none;
}

.splash-subtitle::before,
.splash-subtitle::after {
  content: '';
  display: block;
  width: 24px;
  height: 1px;
  background: #2A2A3E;
}

.splash-bar-wrap {
  position: absolute;
  left: 50%;
  bottom: 5%;
  transform: translateX(-50%);
  width: 60%;
  min-width: 320px;
  max-width: 700px;
  height: 2vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 6px;
  padding: 6px 18px;
  background: rgba(0, 0, 0, 0.25);
  border: 1px solid rgba(200, 200, 220, 0.15);
  border-radius: 4px;
  backdrop-filter: blur(2px);
  z-index: 2;
}

.splash-progress-wrap {
  position: relative;
  z-index: 2;
  width: 320px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

.splash-bar-track {
  width: 100%;
  height: 2px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 99px;
  overflow: visible;
  position: relative;
}

.splash-bar-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg,
    #5B21B6 0%,
    #7C3AED 40%,
    #8B5CF6 70%,
    #A78BFA 100%
  );
  border-radius: 99px;
  transition: width 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
}

.splash-bar-fill::after {
  content: '';
  position: absolute;
  right: -3px;
  top: 50%;
  transform: translateY(-50%);
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #C4B5FD;
  box-shadow:
    0 0 6px 2px rgba(196, 181, 253, 0.7),
    0 0 14px 4px rgba(139, 92, 246, 0.45);
}

.splash-status {
  font-size: 11px;
  font-family: 'Consolas', 'JetBrains Mono', monospace;
  letter-spacing: 0.5px;
  color: #C8C8D8;
  height: 14px;
  text-align: center;
  user-select: none;
  text-shadow: 0 1px 3px rgba(0,0,0,0.8);
}

.splash-version {
  position: absolute;
  bottom: 18px;
  right: 22px;
  font-size: 10px;
  font-family: 'Consolas', 'JetBrains Mono', monospace;
  color: #C8C8D8;
  letter-spacing: 1px;
  z-index: 2;
  user-select: none;
  text-shadow: 0 1px 3px rgba(0,0,0,0.8);
}

.splash-brand {
  position: absolute;
  bottom: 24px;
  left: 28px;
  font-size: 10px;
  letter-spacing: 3px;
  color: #22222E;
  text-transform: uppercase;
  z-index: 2;
  user-select: none;
}

.splash-corner {
  position: absolute;
  width: 18px;
  height: 18px;
  z-index: 2;
  opacity: 0.25;
}
.splash-corner.tl { top: 20px;    left: 20px;    border-top: 1px solid #8B5CF6; border-left: 1px solid #8B5CF6;    }
.splash-corner.tr { top: 20px;    right: 20px;   border-top: 1px solid #8B5CF6; border-right: 1px solid #8B5CF6;   }
.splash-corner.bl { bottom: 20px; left: 20px;    border-bottom: 1px solid #8B5CF6; border-left: 1px solid #8B5CF6; }
.splash-corner.br { bottom: 20px; right: 20px;   border-bottom: 1px solid #8B5CF6; border-right: 1px solid #8B5CF6;}

/* ══════════════════════════════════════════════════════
   FILE OPEN PROGRESS BAR
   ══════════════════════════════════════════════════════ */

#file-load-bar-wrap {
  display: none;
  align-items: center;
  gap: 8px;
  padding: 4px 8px;
  background: var(--cli-bg);
  border-top: 1px solid var(--border);
}

#file-load-bar-wrap.visible {
  display: flex;
}

#file-load-bar-track {
  flex: 1;
  height: 2px;
  background: #1A1A28;
  border-radius: 99px;
  overflow: visible;
  position: relative;
}

#file-load-bar-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, #7C3AED, #8B5CF6, #A78BFA);
  border-radius: 99px;
  transition: width 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
}

#file-load-bar-fill::after {
  content: '';
  position: absolute;
  right: -3px;
  top: 50%;
  transform: translateY(-50%);
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #C4B5FD;
  box-shadow: 0 0 6px 2px rgba(196, 181, 253, 0.6);
}

#file-load-label {
  font-size: 10px;
  font-family: 'Consolas', 'JetBrains Mono', monospace;
  color: #444458;
  white-space: nowrap;
  min-width: 80px;
  text-align: right;
}

/* ══════════════════════════════════════════════════════
   WORKSPACE MANAGEMENT
   ══════════════════════════════════════════════════════ */

.hidden-panel { display: none !important; }

/* Canvas area with rulers */
#canvas-area {
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-rows: auto 1fr;
  overflow: hidden;
}
#ruler-corner { grid-column: 1; grid-row: 1; }
#ruler-h { grid-column: 2; grid-row: 1; }
#ruler-v { grid-column: 1; grid-row: 2; }
#canvas-wrap { grid-column: 2; grid-row: 2; }

#ruler-h, #ruler-v { background: var(--bg-chrome); flex-shrink: 0; }
#ruler-h { height: 20px; width: 100%; border-bottom: 1px solid var(--border); }
#ruler-v { width: 20px; height: 100%; border-right: 1px solid var(--border); }
#ruler-corner {
  width: 20px; height: 20px;
  background: var(--bg-chrome);
  border-right: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

/* Panel title bars */
.panel-title-bar {
  display: flex;
  align-items: center;
  padding: 0 6px;
  height: 22px;
  background: var(--bg-chrome);
  border-bottom: 1px solid var(--border);
  cursor: grab;
  user-select: none;
  flex-shrink: 0;
}
.panel-title-bar:active { cursor: grabbing; }
.panel-drag-handle { color: #333348; font-size: 12px; margin-right: 6px; cursor: grab; }
.panel-title-label { flex: 1; font-size: 10px; letter-spacing: 1px; color: var(--text-dim); text-transform: uppercase; }
.panel-title-controls { display: flex; gap: 4px; }
.panel-ctrl-btn {
  width: 16px; height: 16px;
  background: transparent; border: none;
  color: #333348; cursor: pointer;
  font-size: 11px; display: flex;
  align-items: center; justify-content: center;
  border-radius: 4px; padding: 0;
}
.panel-ctrl-btn:hover { background: var(--active); color: var(--text); }

/* Panel resize handle */
.panel-resize-handle {
  width: 4px; background: transparent;
  cursor: col-resize; flex-shrink: 0;
}
.panel-resize-handle:hover, .panel-resize-handle.dragging { background: var(--accent); }

/* Workspace toggle mini-panel */
#workspace-toggle-panel {
  position: fixed; bottom: 32px; right: 12px;
  z-index: 2000; background: var(--bg-panel);
  border: 1px solid var(--border); border-radius: 6px;
  padding: 0; min-width: 200px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.5);
}
#workspace-toggle-panel.hidden { display: none; }

.ws-panel-header {
  display: flex; justify-content: space-between; align-items: center;
  padding: 6px 10px; border-bottom: 1px solid var(--border);
  font-size: 10px; letter-spacing: 1px; color: var(--text-dim); text-transform: uppercase;
}
.ws-toggle-row {
  display: flex; align-items: center; justify-content: space-between;
  padding: 5px 10px; font-size: 11px; color: var(--text); cursor: pointer;
}
.ws-toggle-row:hover { background: var(--active); }

.ws-toggle-switch {
  width: 28px; height: 14px; border-radius: 7px;
  background: var(--border); position: relative; transition: background 0.15s; flex-shrink: 0;
}
.ws-toggle-switch.on { background: var(--accent); }
.ws-toggle-switch::after {
  content: ''; position: absolute; top: 2px; left: 2px;
  width: 10px; height: 10px; border-radius: 50%;
  background: white; transition: left 0.15s;
}
.ws-toggle-switch.on::after { left: 16px; }

.ws-divider { height: 1px; background: var(--border); margin: 2px 0; }
.ws-footer {
  display: flex; gap: 6px; padding: 6px 10px; border-top: 1px solid var(--border);
}
.ws-btn {
  flex: 1; background: var(--bg-chrome); color: var(--text-dim);
  border: 1px solid var(--border); padding: 3px 8px; font-size: 10px;
  border-radius: 4px; cursor: pointer; font-family: inherit;
}
.ws-btn:hover { background: var(--active); color: var(--text); }

/* Layer panel enhancements */
.layer-filter-wrap {
  padding: 4px 6px; border-bottom: 1px solid var(--border);
  display: flex; gap: 4px; align-items: center;
}
.layer-filter-input {
  flex: 1; background: var(--bg-chrome); border: 1px solid var(--border);
  color: var(--text); font-size: 10px; padding: 2px 5px; font-family: inherit; border-radius: 4px;
}
.layer-filter-input::placeholder { color: #333348; }
.layer-highlight-toggle {
  display: flex; align-items: center; gap: 4px;
  font-size: 10px; color: var(--text-dim); cursor: pointer; user-select: none; white-space: nowrap;
}

/* Tab key full-canvas mode */
body.canvas-focus-mode #panel-left,
body.canvas-focus-mode #panel-right,
body.canvas-focus-mode #cli-container { display: none !important; }

/* ─── ISA Palette (v0.6.0) ─────────────────────────────────────────────── */
/* Each right-side panel needs `flex-shrink: 0` so adjacent panels can't
   collapse into each other when content grows. Without this the Families
   list bleeds into the ISA palette area below it. */
#panel-right > .panel { flex-shrink: 0; }
#isa-panel { display: flex; flex-direction: column; min-height: 0; }
#isa-panel .panel-body {
  padding: 0;
  max-height: 360px;
  overflow-y: auto;
  background: var(--bg-panel);
  position: relative;
  z-index: 1;
}
.isa-pal-cat {
  display: flex; align-items: center; gap: 6px;
  padding: 6px 8px;
  background: var(--bg-chrome);
  border-top: 1px solid var(--border);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.5px;
  cursor: pointer;
  user-select: none;
}
.isa-pal-cat:hover { background: var(--active); }
.isa-pal-chev { width: 10px; color: var(--accent); }
.isa-pal-cat-label { flex: 1; }
.isa-pal-cat-count {
  color: var(--text-dim); font-size: 10px;
  background: rgba(255,255,255,0.04);
  padding: 1px 6px; border-radius: 8px;
}
.isa-pal-list {
  display: block;
  background: rgba(0,0,0,0.12);
}
.isa-pal-subhdr {
  padding: 4px 12px;
  font-size: 10px;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--text-dim);
  border-top: 1px solid var(--border);
}
.isa-pal-row {
  display: grid;
  grid-template-columns: 16px 1fr auto;
  gap: 6px;
  align-items: center;
  padding: 4px 8px 4px 14px;
  font-size: 11px;
  color: var(--text);
  cursor: pointer;
  border-bottom: 1px solid rgba(42,42,53,0.4);
}
.isa-pal-row:hover { background: var(--active); }
.isa-pal-icon { color: var(--accent); text-align: center; }
.isa-pal-name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.isa-pal-tag {
  color: var(--text-dim);
  font-family: Consolas, monospace;
  font-size: 10px;
}
.isa-pal-row-action {
  background: rgba(139, 92, 246, 0.08);
  color: var(--accent);
}
.isa-pal-row-action:hover { background: rgba(139, 92, 246, 0.18); }

/* ─── Inline slot-edit popover (v0.7.0) ──────────────────────────────── */
.bubble-slot-modal {
  position: fixed;
  z-index: 6000;
  min-width: 320px;
  background: var(--bg-panel);
  border: 1px solid var(--accent);
  box-shadow: 0 6px 24px rgba(0,0,0,0.6);
  border-radius: 4px;
  font-family: 'Segoe UI', system-ui, sans-serif;
}
.bubble-slot-modal.hidden { display: none; }
.bsmodal-header {
  padding: 8px 12px;
  background: var(--bg-chrome);
  border-bottom: 1px solid var(--border);
  font-size: 11px;
  letter-spacing: 1px;
  color: var(--text-dim);
  text-transform: uppercase;
  border-radius: 4px 4px 0 0;
}
.bsmodal-body { padding: 10px 12px; display: flex; flex-direction: column; gap: 6px; }
.bsmodal-row {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 8px;
  align-items: center;
  font-size: 11px;
}
.bsmodal-row.bsmodal-check {
  grid-template-columns: auto auto;
  margin-top: 4px;
  color: var(--text-dim);
}
.bsmodal-lbl { color: var(--text-dim); }
.bsmodal-input {
  background: var(--bg-chrome);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 4px 6px;
  font-family: Consolas, monospace;
  font-size: 11px;
  outline: none;
}
.bsmodal-input:focus { border-color: var(--accent); }
.bsmodal-footer {
  padding: 8px 12px;
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  border-top: 1px solid var(--border);
}