/*
 * CAD Tool UI — Fusion 360 inspired, friendly & approachable
 * Deep blue design system ported from text2cad
 *
 * Design language:
 *   - Deep blue tones, professional dark theme
 *   - Compact toolbar at top, horizontal, grouped with separators
 *   - Viewport is the star — maximum space, clean background
 *   - Panels float over viewport, glassmorphic, unobtrusive
 *   - Buttons are small, subtle, highlight on hover/active
 *   - Status bar is minimal, one line at bottom
 *   - Tree panel is collapsible, tucked into top-left of viewport
 *   - Context/properties panel slides in from right only when needed
 */

:root {
  /* Sketch colors — from FreeCAD EditModeCoinManagerParameters.cpp */
  --sk-edge: #FFFFFF;
  --sk-constrained: #80D0A0;
  --sk-constr-construction: #8FA9FD;
  --sk-constr-internal: #DEDEC8;
  --sk-internal: #B2B27F;
  --sk-construction: #0000DC;
  --sk-external: #CC3399;
  --sk-preselect: #E1E100;
  --sk-select: #1CAD1C;
  --sk-preselect-selected: #5D7B1C;
  --sk-fully-defined: #222222;
  --sk-dim-driving: #FF2600;
  --sk-constr-icon: #FF2600;
  --sk-dim-reference: #0026FF;
  --sk-dim-expression: #FF7F26;
  --sk-dim-deactivated: #7F7F7F;
  --sk-cursor-text: #0000FF;
  --sk-invalid: #FF6D00;
  --sk-info: #00FF00;
  --sk-create: #0000FF;

  /* === boolean3d design system — Zoo chalkboard neutrals + lime energy === */
  /* Chalkboard (OKLCh, hue-agnostic) */
  --chalk-10:  oklch(99.11% 0 0);
  --chalk-20:  oklch(95.51% 0 0);
  --chalk-30:  oklch(88.48% 0 0);
  --chalk-50:  oklch(72.41% 0 0);
  --chalk-70:  oklch(48.19% 0 0);
  --chalk-80:  oklch(39.04% 0 0);
  --chalk-90:  oklch(30.12% 0 0);
  --chalk-100: oklch(22.64% 0 0);
  --chalk-110: oklch(18.22% 0 0);
  --chalk-120: oklch(10.00% 0 0);

  /* Lime (Zoo energy ramp) */
  --lime-10: oklch(93.31% 0.227 122.3deg);
  --lime-30: oklch(78.71% 0.1914 125deg);
  --lime-50: oklch(64.10% 0.1557 127.7deg);
  --lime-70: oklch(49.50% 0.1201 130.4deg);

  /* Background */
  --bg-primary: var(--chalk-110);
  --bg-secondary: var(--chalk-100);
  --bg-surface: var(--chalk-100);
  --bg-input: var(--chalk-110);

  /* Accent (lime) */
  --accent: var(--lime-30);
  --accent-hover: var(--lime-10);
  --accent-bg: color-mix(in oklch, var(--lime-30) 14%, transparent);

  /* Text */
  --text-primary: var(--chalk-30);
  --text-secondary: var(--chalk-50);
  --text-muted: var(--chalk-70);

  /* Borders */
  --border: var(--chalk-90);
  --border-light: var(--chalk-80);

  /* Status */
  --danger: oklch(64% 0.21 25deg);
  --success: var(--lime-30);
  --green: var(--lime-30);

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', Menlo, Consolas, monospace;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  font-size: 13px;
  color: var(--text-primary);
  background: var(--bg-primary);
  overflow: hidden;
  height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
}


/* ═══════════════════════════════════════════════════════════════
   TOP NAVIGATION — text2cad style: text links, grouped with separators
   ═══════════════════════════════════════════════════════════════ */

.topnav {
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 12px;
  height: 81px;
  gap: 3px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
  z-index: 100;
  position: relative;
  overflow-x: auto;
  overflow-y: hidden;
  scrollbar-width: thin;
  scrollbar-color: rgba(255, 255, 255, 0.2) transparent;
  flex-shrink: 0;
}
.topnav::-webkit-scrollbar { height: 3px; }
.topnav::-webkit-scrollbar-track { background: transparent; }
.topnav::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.15); border-radius: 2px; }

.topnav a, .topnav label {
  color: var(--text-secondary);
  text-align: center;
  padding: 0 15px;
  text-decoration: none;
  font-size: 18px;
  font-weight: 500;
  line-height: 1.2;
  border-radius: 6px;
  transition: color 0.15s, background 0.15s;
  white-space: nowrap;
  cursor: pointer;
  flex-shrink: 0;
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 75px;
}

/* All sketch commands — compact */
.topnav a[data-command^="Sketcher_"] {
  padding: 0 8px;
  font-size: 17px;
}

/* Command subtitles */
.cmd-subtitle {
  display: block;
  font-size: 8px;
  opacity: 0.45;
  font-weight: 400;
  letter-spacing: 0.2px;
  margin-top: 1px;
  line-height: 1;
}

.topnav a:hover, .topnav label:hover {
  background: rgba(255, 255, 255, 0.07);
  color: #fff;
}

.topnav a:active, .topnav label:active {
  background: rgba(255, 255, 255, 0.12);
}

.topnav a.active {
  background: color-mix(in oklch, var(--lime-30) 14%, transparent);
  color: var(--lime-30);
  border: 1px solid color-mix(in oklch, var(--lime-30) 40%, transparent);
}

/* Disabled command buttons */
.topnav a.disabled {
  color: var(--text-muted);
  pointer-events: none;
  opacity: 0.4;
}

/* Done button — blue, prominent, pulses when profile is ready */
.topnav a[data-command="Sketcher_Close"] {
  background: color-mix(in oklch, var(--lime-30) 14%, transparent);
  color: var(--lime-30);
  border: 1px solid color-mix(in oklch, var(--lime-30) 28%, transparent);
  border-radius: 8px;
  padding: 6px 24px;
  font-weight: 600;
  margin-left: 12px;
  transition: background 0.2s, transform 0.15s;
}

.topnav a[data-command="Sketcher_Close"]:hover {
  background: color-mix(in oklch, var(--lime-30) 22%, transparent);
  transform: scale(1.03);
}

.topnav a[data-command="Sketcher_Close"].has-profile {
  background: var(--accent, var(--lime-30));
  color: #fff;
  border-color: transparent;
  animation: pulse-glow 2s ease-in-out infinite;
}

@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 0 0 transparent; }
  50% { box-shadow: 0 0 12px 2px color-mix(in oklch, var(--lime-30) 28%, transparent); }
}

.nav-separator {
  width: 1px;
  height: 20px;
  background: var(--border);
  margin: 0 4px;
  flex-shrink: 0;
}

.nav-spacer {
  flex: 1;
  min-width: 0;
}

/* Undo/Redo buttons */
.topnav a.undo-btn {
  color: var(--accent);
  font-weight: 600;
  border: 1px solid var(--border-light);
  border-radius: 6px;
  padding: 0 14px;
  line-height: 30px;
  margin-left: 4px;
  transition: all 0.15s;
}
.topnav a.undo-btn:hover {
  background: color-mix(in oklch, var(--lime-30) 14%, transparent);
  border-color: var(--accent);
  color: #fff;
}
.topnav a.undo-btn.disabled {
  color: var(--text-muted);
  border-color: var(--border);
  cursor: default;
  pointer-events: none;
  opacity: 0.5;
}

/* ═══════════════════════════════════════════════════════════════
   SKETCH TOOLBAR — text2cad style icon groups
   ═══════════════════════════════════════════════════════════════ */

.sketch-toolbar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 8px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  flex-wrap: nowrap;
  flex-shrink: 0;
}

.sketch-title {
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  flex-shrink: 0;
  font-size: 12px;
}

.sketch-tools {
  display: flex;
  gap: 0;
  margin-left: 12px;
  align-items: flex-start;
  flex: 1;
  min-width: 0;
  overflow-x: auto;
  overflow-y: hidden;
  scrollbar-width: thin;
  scrollbar-color: rgba(255,255,255,0.2) transparent;
}
.sketch-tools::-webkit-scrollbar { height: 4px; }
.sketch-tools::-webkit-scrollbar-track { background: transparent; }
.sketch-tools::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.2); border-radius: 2px; }

.tool-group {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: 0 8px;
  border-right: 1px solid var(--border);
  flex-shrink: 0;
}
.tool-group:last-child { border-right: none; padding-right: 0; }
.tool-group:first-child { padding-left: 0; }

.tool-group-label {
  font-size: 10px;
  font-weight: 500;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  user-select: none;
  padding-top: 2px;
}

.tool-group-buttons {
  display: flex;
  gap: 1px;
  align-items: center;
}

.tool-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  padding: 0;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 8px;
  color: var(--text-secondary);
  font-size: 0;
  cursor: pointer;
  transition: background 0.1s, color 0.1s;
}
.tool-btn:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-primary);
}
.tool-btn.active {
  background: color-mix(in oklch, var(--lime-30) 18%, transparent);
  color: var(--lime-30);
}
.tool-btn svg { width: 20px; height: 20px; }

.constraint-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  padding: 0;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 6px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: background 0.1s, color 0.1s;
}
.constraint-btn:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-primary);
}
.constraint-btn.active {
  background: color-mix(in oklch, var(--lime-30) 18%, transparent);
  color: var(--lime-30);
}
.constraint-btn svg { width: 16px; height: 16px; }

.dof-display {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-secondary);
  padding: 0 8px;
  white-space: nowrap;
}

.sketch-action-btn {
  padding: 6px 12px;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-primary);
  font-size: 11px;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}
.sketch-action-btn:hover {
  background: var(--bg-input);
  border-color: var(--border-light);
}
.sketch-action-btn.close {
  color: var(--danger);
  border-color: rgba(255, 71, 87, 0.3);
}
.sketch-action-btn.close:hover {
  background: rgba(255, 71, 87, 0.15);
}

/* Mode indicator in right side of toolbar */
#mode-indicator {
  font-size: 10px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-weight: 500;
  flex-shrink: 0;
  white-space: nowrap;
  line-height: 42px;
  margin-left: 4px;
}

#mode-indicator.sketch-mode {
  color: var(--accent);
  background: var(--accent-bg);
  padding: 2px 8px;
  border-radius: 3px;
}

/* DOF indicator */
#dof-indicator {
  font-size: 10px;
  padding: 2px 6px;
  border-radius: 3px;
  font-weight: 500;
  flex-shrink: 0;
  white-space: nowrap;
  line-height: 42px;
  margin-right: 8px;
}

#dof-indicator.under-constrained { color: var(--text-secondary); }
#dof-indicator.fully-constrained { color: var(--green); background: rgba(46, 213, 115, 0.1); }
#dof-indicator.over-constrained { color: var(--sk-invalid); background: rgba(255, 109, 0, 0.1); }

/* Top bar elements (hamburger, doc name) */
.topbar-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 14px;
  cursor: pointer;
  padding: 4px 6px;
  border-radius: 4px;
}
.topbar-btn:hover { background: rgba(255,255,255,0.07); color: var(--text-primary); }

#doc-name {
  font-size: 12px;
  color: var(--text-secondary);
  font-weight: 400;
}

/* File dropdown */
.file-dropdown {
  position: fixed;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  min-width: 180px;
  z-index: 10000;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.5);
  padding: 4px;
}

.file-dropdown-item {
  padding: 7px 12px;
  cursor: pointer;
  font-size: 12px;
  color: var(--text-primary);
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-radius: 4px;
  transition: background 0.15s;
}

.file-dropdown-item:hover {
  background: var(--accent);
  color: white;
}

.file-dropdown-item:hover .file-dropdown-shortcut { color: rgba(255,255,255,0.6); }

.file-dropdown-shortcut {
  font-size: 10px;
  color: var(--text-muted);
}

.file-dropdown-separator {
  height: 1px;
  background: var(--border);
  margin: 4px 6px;
}


/* ═══════════════════════════════════════════════════════════════
   VIEWPORT — the main event
   ═══════════════════════════════════════════════════════════════ */

#viewport {
  flex: 1;
  position: relative;
  overflow: hidden;
  /* Radial gradient: bright matte part centered against deepening dark — same as mock */
  background:
    radial-gradient(ellipse 80% 60% at 50% 40%,
      var(--chalk-90) 0%,
      var(--chalk-110) 70%,
      var(--chalk-120) 100%);
}

/* Action tip banner — appears centered at the top of the viewport during any
   active operation (planeSelect, sketch, edgeSelect, profileSelect, etc.). */
#action-banner {
  position: absolute;
  top: 10px;
  left: 50%;
  transform: translateX(-50%) translateY(-6px);
  max-width: calc(100% - 40px);
  padding: 8px 16px;
  background: oklch(22.64% 0 0 / 0.92);
  border: 1px solid var(--border-light);
  border-radius: 8px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.35);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.15s ease, transform 0.15s ease;
  z-index: 50;
  text-align: center;
}

#action-banner.visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

#action-banner .action-banner-msg {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: 0.1px;
  white-space: nowrap;
}

#action-banner .action-banner-hint {
  font-size: 11px;
  color: var(--text-secondary);
  letter-spacing: 0.15px;
  line-height: 1.35;
}

#action-banner .action-banner-hint:empty {
  display: none;
}

#canvas {
  width: 100%;
  height: 100%;
  display: block;
}

#overlay {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 5;
}

#cursor-coords {
  position: absolute;
  font-size: 10px;
  color: var(--accent);
  font-family: 'SF Mono', 'Cascadia Code', Consolas, monospace;
  pointer-events: none;
  text-shadow: 0 1px 3px rgba(0,0,0,0.5);
}


/* ═══════════════════════════════════════════════════════════════
   FEATURE TREE — text2cad style floating panel
   ═══════════════════════════════════════════════════════════════ */

.feature-tree {
  position: fixed;
  top: 91px;
  left: 0;
  bottom: 24px;
  width: 240px;
  background: var(--bg-secondary);
  border-right: 1px solid var(--border);
  z-index: 100;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.feature-tree-header {
  padding: 14px 16px 10px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 8px;
  background: transparent;
}
.feature-tree-header svg { width: 14px; height: 14px; color: var(--accent); }
.feature-tree-header span { font-size: 11px; font-weight: 600; color: var(--text-primary); letter-spacing: 0.06em; text-transform: uppercase; }

.feature-tree-content {
  overflow-y: auto;
  padding: 4px 0;
}
.feature-tree-content::-webkit-scrollbar { width: 5px; }
.feature-tree-content::-webkit-scrollbar-track { background: transparent; }
.feature-tree-content::-webkit-scrollbar-thumb { background: var(--border-light); border-radius: 3px; }

.feature-tree-empty {
  padding: 12px;
  text-align: center;
  color: var(--text-muted);
  font-size: 11px;
  font-style: italic;
}

.panel-collapse-btn {
  margin-left: auto;
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 2px;
  display: flex;
  align-items: center;
  border-radius: 3px;
  transition: color 0.15s;
}
.panel-collapse-btn:hover { color: var(--text-primary); }

.panel-expand-tab {
  position: fixed;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  color: var(--text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  transition: color 0.15s;
}
.panel-expand-tab:hover { color: var(--text-primary); border-color: var(--border-light); }
.expand-left {
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 20px;
  height: 40px;
  border-radius: 0 6px 6px 0;
  border-left: none;
}

/* Tree items — used by TreeView.js */
.tree-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  margin: 1px 6px;
  border-radius: 4px;
  transition: background 120ms cubic-bezier(0.22, 1, 0.36, 1), color 120ms cubic-bezier(0.22, 1, 0.36, 1);
  cursor: pointer;
  user-select: none;
  font-size: 12px;
  color: var(--text-primary);
}
.tree-item:hover { background: var(--chalk-90); color: var(--chalk-10); }
.tree-item.tree-selected {
  background: color-mix(in oklch, var(--lime-30) 16%, transparent);
  color: var(--accent);
}
.tree-item.tree-selected .tree-icon { color: var(--accent); opacity: 1; }

.tree-eye { font-size: 9px; width: 14px; text-align: center; flex-shrink: 0; opacity: 0.4; cursor: pointer; }
.tree-eye:hover { opacity: 1; color: var(--accent); }
.tree-icon { font-size: 11px; width: 14px; text-align: center; flex-shrink: 0; opacity: 0.7; }
.tree-label { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; cursor: pointer; }
.tree-label:hover { color: var(--accent); }
.tree-children { margin-left: 8px; padding-left: 8px; border-left: 1px solid var(--border); }
.tree-tip { font-weight: 600; }
.tree-tip-marker { font-size: 8px; color: var(--green); margin-left: auto; flex-shrink: 0; }
.tree-info { font-size: 9px; color: var(--lime-10); margin-left: 6px; opacity: 0.7; }
.tree-after-tip { opacity: 0.3; }
.tree-suppressed .tree-label { text-decoration: line-through; opacity: 0.55; }
.tree-suppressed .tree-icon { opacity: 0.4; }
.tree-body-header { font-weight: 600; }
.tree-expand { font-size: 8px; width: 10px; text-align: center; cursor: pointer; flex-shrink: 0; }


/* ═══════════════════════════════════════════════════════════════
   CONTEXT / PROPERTIES PANEL — right side, slides in
   ═══════════════════════════════════════════════════════════════ */

#context-panel {
  position: absolute;
  top: 8px;
  right: 72px;
  width: 200px;
  max-height: calc(100% - 16px);
  overflow-y: auto;
  background: oklch(30.12% 0 0 / 0.95);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px;
  z-index: 20;
  pointer-events: auto;
  backdrop-filter: blur(10px);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.4);
  display: none;
}

#context-panel.visible { display: block; }

.prop-header { font-size: 12px; font-weight: 600; color: var(--text-primary); margin-bottom: 2px; }
.prop-type { font-size: 10px; color: var(--text-muted); padding-bottom: 6px; border-bottom: 1px solid var(--border); margin-bottom: 6px; }

.prop-section {
  font-size: 9px; font-weight: 600; color: var(--accent);
  text-transform: uppercase; letter-spacing: 0.3px;
  padding: 6px 0 3px; border-bottom: 1px solid var(--border);
  margin-bottom: 3px; margin-top: 6px;
}
.prop-section:first-child { margin-top: 0; }

.prop-row {
  display: flex; align-items: center; justify-content: space-between;
  padding: 3px 0;
}

.prop-row label { font-size: 11px; color: var(--text-secondary); }

.prop-row input[type="number"] {
  width: 64px; padding: 3px 5px; font-size: 11px; font-family: inherit;
  color: var(--text-primary); background: var(--bg-input); border: 1px solid var(--border);
  border-radius: 3px; outline: none; text-align: right;
}

.prop-row input[type="number"]:focus { border-color: var(--accent); }

.prop-value { font-size: 11px; color: var(--text-primary); }
.prop-value.readonly { color: var(--text-muted); }
.prop-status-ok { color: var(--green); }
.prop-status-warn { color: var(--text-secondary); }
.prop-status-error { color: var(--sk-invalid); }

.prop-action-btn {
  width: 100%;
  padding: 4px 8px;
  margin-top: 4px;
  font-size: 11px;
  color: var(--text-primary);
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 4px;
  cursor: pointer;
  transition: background 0.15s;
}
.prop-action-btn:hover { background: var(--border); }


/* ═══════════════════════════════════════════════════════════════
   SHAPE SELECTOR PANEL — text2cad style, right side
   ═══════════════════════════════════════════════════════════════ */

.shape-panel {
  position: fixed;
  top: 52px;
  right: 10px;
  width: 180px;
  max-height: calc(100vh - 70px);
  background: oklch(22.64% 0 0 / 0.95);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
  z-index: 120;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  backdrop-filter: blur(10px);
  transition: opacity 0.2s, transform 0.2s, visibility 0.2s;
}
.shape-panel.collapsed {
  opacity: 0;
  transform: translateX(20px);
  pointer-events: none;
  visibility: hidden;
}

.shape-panel-header {
  padding: 10px 12px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 8px;
}
.shape-panel-header svg { width: 16px; height: 16px; color: var(--accent); }
.shape-panel-header span { font-size: 12px; font-weight: 600; color: var(--text-primary); letter-spacing: 0.3px; }

.shape-panel-content {
  overflow-y: auto;
  padding: 8px;
}
.shape-panel-content::-webkit-scrollbar { width: 5px; }
.shape-panel-content::-webkit-scrollbar-track { background: transparent; }
.shape-panel-content::-webkit-scrollbar-thumb { background: var(--border-light); border-radius: 3px; }

.shape-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
}

.shape-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 8px 4px 6px;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: background 0.15s, color 0.15s, box-shadow 0.15s, border-color 0.15s;
  user-select: none;
}
.shape-item:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-primary);
  border-color: var(--accent);
  box-shadow: 0 0 12px color-mix(in oklch, var(--lime-30) 25%, transparent);
}
.shape-item:active {
  background: color-mix(in oklch, var(--lime-30) 18%, transparent);
}
.shape-item svg {
  width: 48px;
  height: 48px;
  margin-bottom: 2px;
}
.shape-item span {
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.2px;
}

.expand-right {
  right: 0;
  top: 200px;
  width: 20px;
  height: 40px;
  border-radius: 6px 0 0 6px;
  border-right: none;
}


/* ═══════════════════════════════════════════════════════════════
   VIEW CUBE — top right of viewport
   ═══════════════════════════════════════════════════════════════ */

#viewcube {
  position: absolute;
  top: 8px;
  right: 8px;
  width: 120px;
  height: 120px;
  pointer-events: auto;
  z-index: 10;
}

#viewcube canvas {
  cursor: pointer;
}


/* ═══════════════════════════════════════════════════════════════
   STATUS BAR — thin, bottom edge
   ═══════════════════════════════════════════════════════════════ */

#statusbar {
  height: 24px;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 14px;
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-muted);
  flex-shrink: 0;
  letter-spacing: 0.02em;
}

#status-message { color: var(--text-secondary); }
#status-hints { color: var(--text-muted); font-size: 10px; }

.hud-fields {
  display: flex;
  gap: 18px;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 10px;
}
.hud-fields .k { color: var(--chalk-70); margin-right: 4px; }
.hud-fields .v { color: var(--chalk-30); }
.hud-fields .sep { color: var(--chalk-80); }

/* Logo in topnav */
.topnav-logo {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 18px;
  letter-spacing: -0.01em;
  color: var(--chalk-10);
  padding: 0 16px 0 4px;
  margin-right: 8px;
  user-select: none;
  display: inline-flex;
  align-items: center;
  height: 100%;
  flex-shrink: 0;
}
.topnav-logo .dot { color: var(--accent); }

/* Saved pill in topnav */
.topnav-saved {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 26px;
  padding: 0 12px;
  border-radius: 999px;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-family: var(--font-sans);
  font-size: 11px;
  margin: 0 8px;
  flex-shrink: 0;
  transition: all 150ms ease;
}
.topnav-saved .pulse {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 6px color-mix(in oklch, var(--accent) 60%, transparent);
}
.topnav-saved.saving .pulse { background: var(--warning, oklch(76% 0.16 75deg)); }
.topnav-saved.error .pulse { background: var(--danger); }

/* JetBrains Mono for all numeric inputs + coords/measurements */
input[type="number"],
input.num-input,
input[data-numeric],
.mono,
#cursor-coords,
.coord-readout,
.dim-input,
.dim-value,
.measurement {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0;
}

/* Feature tree section header */
.tree-section-label {
  padding: 8px 14px 4px;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  font-weight: 600;
}

/* Empty-state polish */
.feature-tree-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 28px 18px;
  color: var(--text-muted);
  text-align: center;
  font-size: 12px;
}
.feature-tree-empty::before {
  content: "";
  width: 36px; height: 36px;
  background: color-mix(in oklch, var(--lime-30) 12%, transparent);
  border-radius: 50%;
  display: grid;
  place-items: center;
}

.welcome-overlay {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  pointer-events: none;
  z-index: 5;
  transition: opacity 0.3s;
}

.welcome-overlay.hidden {
  opacity: 0;
  pointer-events: none !important;
  display: none;
}

.start-drawing-btn {
  pointer-events: auto;
  background: var(--accent, var(--lime-30));
  color: #fff;
  border: none;
  border-radius: 12px;
  padding: 18px 48px;
  font-size: 20px;
  font-weight: 600;
  font-family: 'Inter', sans-serif;
  cursor: pointer;
  transition: background 0.2s, transform 0.15s;
  box-shadow: 0 4px 24px color-mix(in oklch, var(--lime-30) 28%, transparent);
}

.start-drawing-btn:hover {
  background: var(--lime-50);
  transform: scale(1.04);
}

.start-drawing-btn:active {
  transform: scale(0.98);
}

.welcome-hint {
  pointer-events: none;
  margin-top: 12px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.4);
  font-family: 'Inter', sans-serif;
}
.welcome-text strong {
  color: var(--accent);
}

.unit-toggle-nav {
  padding: 4px 10px;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  flex-shrink: 0;
}
.unit-toggle-nav:hover {
  border-color: var(--accent);
}


/* ═══════════════════════════════════════════════════════════════
   SELECTS, CONTEXT MENUS, MISC
   ═══════════════════════════════════════════════════════════════ */

.sm-select {
  width: 100%; padding: 3px 5px; font-size: 11px; font-family: inherit;
  color: var(--text-primary); background: var(--bg-input); border: 1px solid var(--border);
  border-radius: 3px; outline: none; cursor: pointer;
}
.sm-select:focus { border-color: var(--accent); }
.sm-select option { background: var(--bg-surface); color: var(--text-primary); }

.tree-context-menu {
  position: fixed;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 4px;
  min-width: 130px;
  z-index: 1000;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.5);
}

.tree-context-item {
  padding: 6px 12px; cursor: pointer; font-size: 11px; color: var(--text-primary); border-radius: 4px;
  transition: background 0.15s;
}
.tree-context-item:hover { background: rgba(255,255,255,0.07); }
.tree-context-danger { color: var(--danger); }
.tree-context-sep { height: 1px; background: var(--border); margin: 3px 6px; }

/* ─── Viewport Context Menu ──────────────────────────────── */
.ctx-menu {
  position: fixed;
  z-index: 1100;
  background: oklch(18.22% 0 0 / 0.95);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  padding: 4px;
  min-width: 180px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.6), 0 0 0 1px rgba(255,255,255,0.03) inset;
  font-size: 12px;
  user-select: none;
}

.ctx-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border-radius: 5px;
  cursor: pointer;
  color: var(--text-primary);
  transition: background 0.12s;
}
.ctx-item:hover { background: color-mix(in oklch, var(--lime-30) 18%, transparent); }
.ctx-item.ctx-danger { color: #ef5350; }
.ctx-item.ctx-danger:hover { background: rgba(239, 83, 80, 0.15); }
.ctx-item.ctx-disabled { opacity: 0.35; pointer-events: none; }

.ctx-icon { width: 16px; text-align: center; font-size: 11px; }
.ctx-label { flex: 1; }
.ctx-shortcut { font-size: 10px; color: var(--text-secondary); opacity: 0.6; margin-left: 16px; }

/* ─── Operation Flyout Panel ─────────────────────────────── */
.op-panel {
  position: fixed;
  top: 60px;
  right: 16px;
  width: 296px;
  /* Cap height to viewport — title + actions stay anchored, body scrolls. */
  max-height: calc(100vh - 80px);
  display: flex;
  flex-direction: column;
  background: oklch(18.22% 0 0 / 0.96);
  backdrop-filter: blur(14px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 10px;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.55);
  z-index: 200;
  font-size: 12px;
  overflow: hidden;
}

.op-panel-title {
  padding: 12px 16px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-primary);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.op-panel-body {
  padding: 14px 16px;
  /* Take all the vertical room not used by title + actions, scroll if it
     overflows (e.g. extrude panel with all dropdowns + length₂ visible). */
  overflow-y: auto;
  min-height: 0;
  flex: 1;
}

.op-param {
  display: flex; align-items: center; gap: 10px;
  padding: 9px 0;
}
.op-param label {
  font-size: 11px;
  color: var(--text-secondary);
  min-width: 70px;
}
.op-param input {
  flex: 1;
  height: 30px;
  background: rgba(255,255,255,0.07);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 6px;
  color: var(--text-primary);
  padding: 0 10px;
  font-size: 13px;
  outline: none;
}

.op-step {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 0;
  color: var(--text-secondary);
}
.op-step.active { color: var(--text-primary); font-weight: 500; }
.op-step.done { color: var(--green); }

.op-step-num {
  width: 20px; height: 20px;
  border-radius: 50%;
  border: 1.5px solid currentColor;
  display: flex; align-items: center; justify-content: center;
  font-size: 10px; flex-shrink: 0;
}
.op-step.active .op-step-num { background: var(--accent); border-color: var(--accent); color: #fff; }
.op-step.done .op-step-num { background: var(--green); border-color: var(--green); color: #fff; }

.op-step-label { flex: 1; }
.op-step-info { font-size: 10px; opacity: 0.6; }

.op-step-action {
  margin-left: 8px;
  padding: 2px 8px;
  font-size: 11px;
  font-family: inherit;
  color: #fff;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 3px;
  cursor: pointer;
}
.op-step-action:hover {
  background: rgba(255, 255, 255, 0.16);
}

.op-param input:focus { border-color: var(--accent); }
.op-param input[type="checkbox"] { flex: 0 0 auto; height: 14px; width: 14px; padding: 0; }

.op-param-enum { display: flex; gap: 4px; flex: 1; }
.op-btn-enum {
  flex: 1; padding: 6px 8px; background: rgba(255,255,255,0.07);
  border: 1px solid rgba(255,255,255,0.12); border-radius: 5px;
  color: var(--text-primary); font-size: 11px; cursor: pointer;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.op-btn-enum:hover { background: rgba(255,255,255,0.12); }
.op-btn-enum.active { background: var(--accent); border-color: var(--accent); color: #fff; }

.op-panel-actions {
  display: flex; gap: 8px;
  padding: 10px 14px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}
.op-btn {
  flex: 1; padding: 6px 0; border: none; border-radius: 6px;
  font-size: 11px; font-weight: 500; cursor: pointer;
}
.op-btn-apply { background: var(--accent); color: #fff; }
.op-btn-apply:hover { filter: brightness(1.1); }
.op-btn-apply:disabled { opacity: 0.4; cursor: default; filter: none; }
.op-btn-cancel { background: rgba(255,255,255,0.08); color: var(--text-secondary); }
.op-btn-cancel:hover { background: rgba(255,255,255,0.12); }

/* AutoPanel: declarative panel rendered from a FeatureDef. Inherits
   .op-panel/.op-panel-body from above; adds row + per-renderer styles. */
.op-auto-params { display: flex; flex-direction: column; gap: 6px; padding: 10px 14px; }
.op-param-row {
  display: flex; align-items: center; gap: 8px;
  font-size: 11px; min-height: 24px;
}
.op-param-row .op-param-label {
  flex: 0 0 110px; color: var(--text-secondary); text-align: right;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.op-param-boolean { gap: 8px; cursor: pointer; }
.op-param-boolean input[type="checkbox"] { height: 14px; width: 14px; flex: 0 0 auto; }
.op-param-boolean .op-param-label { flex: 1 1 auto; text-align: left; cursor: pointer; }
.op-param-row input[type="text"], .op-param-row input[type="number"], .op-param-row select {
  flex: 1 1 auto; padding: 4px 8px; font-size: 11px;
  background: rgba(255,255,255,0.06); color: var(--text-primary);
  border: 1px solid rgba(255,255,255,0.12); border-radius: 4px;
}
.op-param-row input:focus, .op-param-row select:focus { outline: none; border-color: var(--accent); }
.op-param-quantity-input { display: flex; align-items: center; gap: 6px; flex: 1 1 auto; }
.op-param-quantity-suffix { color: var(--text-secondary); font-size: 11px; min-width: 18px; }
.op-param-enum-group { display: flex; gap: 4px; flex: 1; }
.op-param-querylist, .op-param-featurelist {
  border-radius: 4px; padding: 6px 8px; cursor: pointer;
  background: rgba(255,255,255,0.04);
  border: 1px solid transparent;
}
.op-param-querylist:hover, .op-param-featurelist:hover { background: rgba(255,255,255,0.08); }
.op-param-querylist.op-step-active, .op-param-featurelist.op-step-active {
  border-color: var(--accent); background: color-mix(in oklch, var(--lime-30) 10%, transparent);
}
.op-param-querylist .op-step-info, .op-param-featurelist .op-step-info {
  flex: 1 1 auto; opacity: 0.7;
}
.op-param-invalid input, .op-param-invalid select { border-color: #cd2e2e !important; }
.op-param-invalid { background: rgba(205,46,46,0.06); }

.ctx-sep { height: 1px; background: rgba(255, 255, 255, 0.08); margin: 3px 8px; }
.ctx-header {
  padding: 4px 12px 2px;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
  opacity: 0.5;
}


/* ═══════════════════════════════════════════════════════════════
   INLINE DIMENSION INPUT — floating near cursor during sketch tools
   ═══════════════════════════════════════════════════════════════ */

.inline-input {
  position: absolute;
  pointer-events: auto;
  z-index: 110;
  display: flex;
  gap: 6px;
  padding: 4px 8px;
  background: oklch(18.22% 0 0 / 0.85);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border);
  border-radius: 6px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
}

.ii-field {
  display: flex;
  align-items: center;
  gap: 3px;
}

.ii-label {
  font-size: 10px;
  font-weight: 600;
  color: var(--text-secondary);
  min-width: 12px;
}

.ii-input {
  width: 52px;
  padding: 2px 4px;
  font-size: 11px;
  font-family: 'SF Mono', 'Cascadia Code', Consolas, monospace;
  color: var(--text-primary);
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 3px;
  outline: none;
  text-align: right;
  -moz-appearance: textfield;
}

.ii-input::-webkit-outer-spin-button,
.ii-input::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

.ii-input:focus { border-color: var(--accent); }
.ii-input::placeholder { color: var(--text-muted); }

.ii-unit {
  font-size: 9px;
  color: var(--text-muted);
}

.ii-lock {
  font-size: 10px;
  min-width: 14px;
}

.ii-field.ii-locked .ii-input {
  border-color: #DAA520;
  background: rgba(218, 165, 32, 0.1);
}

/* Expression-mode input with invalid syntax — Fusion-style red highlight */
.ii-field.ii-invalid .ii-input {
  border-color: #d04040;
  background: rgba(208, 64, 64, 0.1);
  color: #ff8080;
}


/* ═══════════════════════════════════════════════════════════════
   SCROLLBAR
   ═══════════════════════════════════════════════════════════════ */

::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(255, 255, 255, 0.08); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(255, 255, 255, 0.15); }


/* ═══════════════════════════════════════════════════════════════
   HIDDEN LEGACY ELEMENTS
   ═══════════════════════════════════════════════════════════════ */

#shortcut-bar { display: none; }
#tool-palette { display: contents; }

/* Workbench dropdown — same style as file dropdown */
.workbench-dropdown { top: 34px; }
.workbench-dropdown .file-dropdown-item[data-workbench] { gap: 8px; }


/* ═══════════════════════════════════════════════════════════════
   CONSTRAINT HINTS — badges near cursor during sketch tools
   ═══════════════════════════════════════════════════════════════ */

.constraint-hints {
  position: absolute;
  pointer-events: none;
  z-index: 100;
  display: flex;
  gap: 3px;
}

.ch-badge {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: 1.5px solid;
  font-size: 10px;
  font-weight: 700;
  font-family: 'Inter', system-ui, sans-serif;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
}

/* ═══════════════════════════════════════════════════════════════
   TRANSITIONS & POLISH
   ═══════════════════════════════════════════════════════════════ */

/* Active sketch editing indicator in tree */
.tree-item.tree-editing {
  border-left: 2px solid var(--accent);
  padding-left: 8px;
}

.tree-item.tree-error .tree-icon {
  color: var(--danger) !important;
}

/* Toolbar button relative positioning for pseudo-elements */
.toolbar-btn {
  position: relative;
}

/* ─── Window / Crossing Selection Box ────────────────────── */
#selection-box {
  position: fixed;
  pointer-events: none;
  z-index: 50;
  display: none;
}

#selection-box.window-select {
  border: 1.5px solid rgba(74, 144, 217, 0.9);
  background: rgba(74, 144, 217, 0.08);
}

#selection-box.crossing-select {
  border: 1.5px dashed rgba(46, 204, 113, 0.9);
  background: rgba(46, 204, 113, 0.08);
}

/* ===============================================================
   AUTH MODAL
   =============================================================== */

.auth-modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10000;
  backdrop-filter: blur(4px);
}

.auth-modal {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 32px;
  max-width: 380px;
  width: 90%;
  text-align: center;
}

.auth-modal-header h2 {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.auth-modal-header p {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 24px;
  line-height: 1.5;
}

.auth-google-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: 100%;
  padding: 10px 16px;
  font-size: 14px;
  font-weight: 500;
  color: #fff;
  background: var(--bg-input);
  border: 1px solid var(--border-light);
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}

.auth-google-btn:hover {
  background: var(--bg-secondary);
  border-color: var(--accent);
}

.auth-close-btn {
  display: block;
  margin: 12px auto 0;
  padding: 6px 12px;
  font-size: 12px;
  color: var(--text-muted);
  background: none;
  border: none;
  cursor: pointer;
}

.auth-close-btn:hover {
  color: var(--text-secondary);
}

/* ===============================================================
   INPUT DIALOG (Save As, Rename, …)
   =============================================================== */

.input-dialog {
  text-align: left;
  max-width: 420px;
  padding: 20px 22px;
}

.input-dialog-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0 0 12px 0;
}

.input-dialog-message {
  font-size: 12px;
  color: var(--text-secondary);
  margin: 0 0 12px 0;
  line-height: 1.5;
}

.input-dialog-input {
  width: 100%;
  box-sizing: border-box;
  padding: 8px 10px;
  font-size: 13px;
  font-family: inherit;
  color: var(--text-primary);
  background: var(--bg-input);
  border: 1px solid var(--border-light);
  border-radius: 6px;
  outline: none;
}

.input-dialog-input:focus {
  border-color: var(--accent);
}

.input-dialog-buttons {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 16px;
}

.input-dialog-btn {
  padding: 7px 16px;
  font-size: 13px;
  font-family: inherit;
  border-radius: 6px;
  border: 1px solid var(--border-light);
  background: var(--bg-input);
  color: var(--text-primary);
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}

.input-dialog-btn:hover {
  background: var(--bg-secondary);
}

.input-dialog-ok {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  font-weight: 500;
}

.input-dialog-ok:hover {
  filter: brightness(1.1);
  background: var(--accent);
}

/* ===============================================================
   SYNC STATUS INDICATOR
   =============================================================== */

.sync-status {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 3px;
  white-space: nowrap;
  transition: opacity 0.2s;
}

.sync-saved {
  color: var(--success);
  opacity: 0.7;
}

.sync-saving {
  color: var(--accent);
  opacity: 1;
}

.sync-offline {
  color: var(--text-secondary);
  opacity: 0.8;
}

/* ===============================================================
   DASHBOARD
   =============================================================== */

#dashboard {
  display: none;
  flex-direction: column;
  position: fixed;
  inset: 0;
  background: var(--bg-primary);
  z-index: 5000;
  overflow-y: auto;
}

.dashboard-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-secondary);
}

.dashboard-logo {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.3px;
}

.dashboard-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.dashboard-user {
  font-size: 12px;
  color: var(--text-secondary);
}

.dashboard-marketplace-btn {
  color: var(--accent);
  text-decoration: none;
  font-size: 13px;
  font-weight: 500;
  padding: 6px 14px;
  border: 1px solid var(--accent);
  border-radius: 6px;
  transition: background 0.15s;
}
.dashboard-marketplace-btn:hover {
  background: color-mix(in oklch, var(--lime-30) 14%, transparent);
}

.dashboard-signout-btn {
  font-size: 12px;
  color: var(--text-muted);
  background: none;
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 4px 10px;
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s;
}

.dashboard-signout-btn:hover {
  color: var(--text-primary);
  border-color: var(--border-light);
}

.dashboard-body {
  padding: 24px;
  max-width: 1100px;
  margin: 0 auto;
  width: 100%;
}

.dashboard-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.dashboard-new-btn {
  padding: 8px 16px;
  font-size: 13px;
  font-weight: 500;
  color: #fff;
  background: var(--accent);
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.15s;
}

.dashboard-new-btn:hover {
  background: var(--accent-hover);
}

.dashboard-sort {
  font-size: 12px;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 4px;
}

.dashboard-sort select {
  background: var(--bg-input);
  border: 1px solid var(--border);
  color: var(--text-primary);
  font-size: 12px;
  padding: 4px 8px;
  border-radius: 4px;
}

.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
}

.project-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  cursor: pointer;
  transition: border-color 0.15s, transform 0.1s;
}

.project-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.project-card-thumb {
  height: 140px;
  background: linear-gradient(135deg, var(--bg-secondary), var(--bg-primary));
  background-size: cover;
  background-position: center;
}

.project-card-info {
  padding: 10px 12px;
}

.project-card-name {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.project-card-date {
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 2px;
}

.dashboard-empty {
  text-align: center;
  padding: 60px 0;
  color: var(--text-secondary);
  font-size: 15px;
}

.dashboard-empty-hint {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 8px;
}

/* Project context menu */
.project-context-menu {
  position: fixed;
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: 6px;
  padding: 4px 0;
  min-width: 160px;
  z-index: 10001;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.4);
}

.project-context-item {
  padding: 6px 14px;
  font-size: 12px;
  color: var(--text-primary);
  cursor: pointer;
}

.project-context-item:hover {
  background: var(--accent-bg);
}

.project-context-item.danger {
  color: var(--danger);
}

.project-context-separator {
  height: 1px;
  background: var(--border);
  margin: 4px 0;
}

/* ===============================================================
   TOPNAV RIGHT (auth/cloud buttons)
   =============================================================== */

.topnav-right {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 8px;
  padding-right: 8px;
}

.topnav-signin-btn,
.topnav-cloud-btn,
.topnav-dashboard-btn {
  font-size: 11px;
  padding: 3px 10px;
  border-radius: 4px;
  cursor: pointer;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-secondary);
  transition: color 0.15s, border-color 0.15s;
}

.topnav-signin-btn:hover,
.topnav-cloud-btn:hover,
.topnav-dashboard-btn:hover {
  color: var(--text-primary);
  border-color: var(--accent);
}


/* ═══════════════════════════════════════════════════════════════
   TOOLBAR DROPDOWN GROUPS — overflow menus for sketcher tools
   ═══════════════════════════════════════════════════════════════ */

.toolbar-dropdown {
  position: relative;
  display: inline-block;
}

.toolbar-dropdown-trigger {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  font-size: 11px;
  color: rgba(255, 255, 255, 0.55);
  text-decoration: none;
  cursor: pointer;
  border-radius: 4px;
  white-space: nowrap;
  transition: background 0.15s, color 0.15s;
}

.toolbar-dropdown-trigger:hover {
  background: rgba(255, 255, 255, 0.08);
  color: rgba(255, 255, 255, 0.85);
}

.toolbar-dropdown-menu {
  display: none;
  position: fixed;
  min-width: 140px;
  background: var(--panel-bg, #2a2a2a);
  border: 1px solid var(--border-light, rgba(255, 255, 255, 0.08));
  border-radius: 6px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
  padding: 4px 0;
  z-index: 10000;
}

.toolbar-dropdown-menu.open {
  display: block;
}

.toolbar-dropdown-item {
  display: block;
  padding: 6px 14px;
  font-size: 11px;
  color: rgba(255, 255, 255, 0.75);
  text-decoration: none;
  white-space: nowrap;
  transition: background 0.12s;
}

.toolbar-dropdown-item:hover {
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
}

.toolbar-dropdown-item.disabled {
  opacity: 0.4;
  pointer-events: none;
}

/* ═══════════════════════════════════════════════════════════════
   ICON BUTTONS — SVG icon on top, small text label beneath
   ═══════════════════════════════════════════════════════════════ */

.topnav a.icon-btn {
  min-width: 52px;
  padding: 4px 6px;
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  line-height: 1;
}

.topnav a.icon-btn.toolbar-dropdown-trigger {
  padding: 4px 8px;
}

/* Sketch toolbar — icon-only mode. The label still renders into the DOM
   for accessibility and tooltips read it via cmd.title, but it's visually
   hidden so the toolbar can pack tightly.
   Excludes Sketcher_NewSketch — that lives in the outer PartDesign toolbar
   where every other command shows its label, so it should too. */
.topnav a[data-command^="Sketcher_"]:not([data-command="Sketcher_NewSketch"]).icon-btn,
.topnav a.toolbar-split-main.icon-btn {
  min-width: 42px;
  width: 42px;
  padding: 6px;
  font-size: 17px;
}

.topnav a[data-command^="Sketcher_"]:not([data-command="Sketcher_NewSketch"]).icon-btn .cmd-label,
.topnav a.toolbar-split-main.icon-btn .cmd-label {
  display: none;
}

/* Dropdown items inside split menus DO show their full label — don't
   inherit the hide rule. */
.toolbar-split-menu .toolbar-dropdown-item .cmd-label,
.toolbar-panel-menu .toolbar-dropdown-item .cmd-label {
  display: inline-block;
}

/* ═══════════════════════════════════════════════════════════════
   RIBBON PANELS — Fusion-style: icon row + clickable Label ▾
   ═══════════════════════════════════════════════════════════════ */

.toolbar-panel {
  display: inline-flex;
  flex-direction: column;
  align-items: stretch;
  height: 75px;
  padding: 0 8px;
  margin: 0 2px;
  border-right: 1px solid rgba(255, 255, 255, 0.08);
}

.toolbar-panel-icons {
  display: flex;
  align-items: center;
  gap: 1px;
  flex: 1 1 auto;
  min-height: 0;
}

/* Buttons inside a panel use auto height so the label below has room */
.toolbar-panel-icons a {
  height: auto !important;
  padding: 4px 5px !important;
}

.toolbar-panel-icons .cmd-icon {
  width: 28px;
  height: 28px;
}

/* Compact panel (constraints) — tighter icons so 11+ fit cleanly */
.toolbar-panel-compact .toolbar-panel-icons a {
  padding: 4px 2px !important;
  min-width: 0 !important;
  width: auto !important;
}

.toolbar-panel-compact .toolbar-panel-icons .cmd-icon {
  width: 22px;
  height: 22px;
}

.topnav a.toolbar-panel-label {
  align-self: center;
  display: inline-flex !important;
  flex-direction: row !important;
  align-items: center;
  gap: 3px;
  height: auto !important;
  padding: 2px 6px !important;
  margin-top: 2px;
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.5px;
  color: rgba(255, 255, 255, 0.55);
  text-decoration: none;
  cursor: pointer;
  border-radius: 3px;
  transition: color 0.15s;
}

.topnav a.toolbar-panel-label:hover {
  color: rgba(255, 255, 255, 0.95);
  background: transparent;
}

.toolbar-panel-chevron {
  font-size: 11px;
  line-height: 1;
  opacity: 0.85;
}

/* Dropdown — comprehensive panel menu */
.toolbar-panel-menu {
  min-width: 220px;
  padding: 6px 0;
}

.toolbar-panel-menu .toolbar-dropdown-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 6px 16px;
  font-size: 12px;
}

.toolbar-panel-menu .toolbar-dropdown-item .cmd-icon {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.toolbar-panel-menu .cmd-icon-blank {
  background: none;
}

.toolbar-panel-menu .cmd-label {
  flex: 1 1 auto;
}

.toolbar-dropdown-shortcut {
  margin-left: auto;
  padding-left: 16px;
  color: rgba(255, 255, 255, 0.4);
  font-size: 11px;
  font-family: monospace;
}

.toolbar-dropdown-sep {
  height: 1px;
  margin: 4px 8px;
  background: rgba(255, 255, 255, 0.08);
}

/* Icons render via mask-image so color comes from the host's currentColor.
   Uniform treatment for Lucide stroke icons, Phosphor filled icons, and
   our hand-drawn Fillet/Chamfer. The alpha channel is all the mask cares
   about — fills and strokes collapse to the same silhouette. */
.cmd-icon {
  display: inline-block;
  width: 33px;
  height: 33px;
  background-color: currentColor;
  -webkit-mask: var(--icon-url) center / contain no-repeat;
          mask: var(--icon-url) center / contain no-repeat;
}

.topnav a.icon-btn .cmd-label {
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.2px;
  opacity: 0.85;
  white-space: nowrap;
}

/* ═══════════════════════════════════════════════════════════════
   SETTINGS PANEL — gear popover
   ═══════════════════════════════════════════════════════════════ */

.settings-panel {
  position: fixed;
  min-width: 240px;
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: 8px;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.5);
  padding: 12px;
  z-index: 10000;
  font-size: 13px;
  color: var(--text-primary);
}

.settings-header {
  font-weight: 600;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-secondary);
  padding-bottom: 8px;
  margin-bottom: 8px;
  border-bottom: 1px solid var(--border);
}

.settings-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 6px 0;
}

.settings-label {
  color: var(--text-primary);
  font-size: 13px;
}

.settings-segmented {
  display: inline-flex;
  border: 1px solid var(--border-light);
  border-radius: 6px;
  overflow: hidden;
  background: var(--bg-input);
}

.settings-segment {
  background: transparent;
  color: var(--text-secondary);
  border: 0;
  padding: 4px 12px;
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  font-family: inherit;
  min-width: 42px;
  transition: background 0.15s, color 0.15s;
}

.settings-segment:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.05);
}

.settings-segment.active {
  background: var(--accent);
  color: #fff;
}

/* ============================================================
 * Boot loader — fullscreen block until OCCT worker is warm
 * ============================================================ */
#boot-loader {
  position: fixed;
  inset: 0;
  z-index: 99999;
  background: linear-gradient(180deg, oklch(18.22% 0 0) 0%, oklch(10% 0 0) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 1;
  transition: opacity 400ms ease;
  pointer-events: all;
}
#boot-loader.hidden {
  opacity: 0;
  pointer-events: none;
}
.boot-loader-card {
  text-align: center;
  color: oklch(88.48% 0 0);
  font-family: 'Inter', -apple-system, sans-serif;
  padding: 32px 48px;
}
.boot-loader-brand {
  font-size: 36px;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}
.boot-loader-brand span {
  font-weight: 400;
  opacity: 0.6;
}
.boot-loader-msg {
  font-size: 14px;
  opacity: 0.75;
  margin-bottom: 20px;
  min-height: 1.4em;
}
.boot-loader-bar {
  width: 280px;
  height: 3px;
  background: rgba(255,255,255,0.08);
  border-radius: 2px;
  overflow: hidden;
  margin: 0 auto 16px;
}
.boot-loader-bar-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--lime-30) 0%, var(--lime-10) 100%);
  border-radius: 2px;
  transition: width 200ms ease;
}
.boot-loader-hint {
  font-size: 11px;
  opacity: 0.4;
  letter-spacing: 0.02em;
}

/* ═══════════════════════════════════════════════════════════════
   WORKBENCH SWITCHER — Assembly D1 wire-up
   ─────────────────────────────────────────────────────────────────
   Manual workbench picker. Sits absolute-positioned at the top-left of
   the topnav so the dynamic toolbar (rebuilt on every workbench switch)
   doesn't overwrite it. The topnav has padding-left set on the same
   selector below to make room.
   ═══════════════════════════════════════════════════════════════ */
.workbench-switcher {
  position: fixed;
  top: 18px;
  left: 18px;
  z-index: 200;
  background: var(--bg-tertiary, #1f1f1f);
  color: var(--text-primary, #ddd);
  border: 1px solid var(--border, #3a3a3a);
  border-radius: 6px;
  padding: 8px 15px;
  font-size: 18px;
  font-family: inherit;
  cursor: pointer;
  outline: none;
  transition: border-color 120ms ease, background 120ms ease;
}
.workbench-switcher:hover {
  border-color: var(--accent, var(--lime-30));
  background: var(--bg-hover, #2a2a2a);
}
.workbench-switcher:focus {
  border-color: var(--accent, var(--lime-30));
}
/* Reserve space at the start of the dynamic toolbar so the absolute-
   positioned switcher doesn't sit on top of the first command button. */
.topnav {
  padding-left: 210px;
}

/* ═══════════════════════════════════════════════════════════════
   SPLIT BUTTONS — Fusion-style: family icon+label on left,
   chevron on right that opens a variant dropdown.
   ═══════════════════════════════════════════════════════════════ */

.toolbar-split {
  display: inline-flex;
  align-items: stretch;
  position: relative;
  border-radius: 4px;
}

.topnav a.toolbar-split-main {
  border-top-right-radius: 0;
  border-bottom-right-radius: 0;
  margin-right: 0 !important;
}

.toolbar-split-chevron {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 21px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.55);
  text-decoration: none;
  cursor: pointer;
  border-top-right-radius: 4px;
  border-bottom-right-radius: 4px;
  border-left: 1px solid rgba(255, 255, 255, 0.06);
  transition: background 0.15s, color 0.15s;
}

.toolbar-split-chevron:hover {
  background: rgba(255, 255, 255, 0.08);
  color: rgba(255, 255, 255, 0.95);
}

/* Dropdown items inside a split menu show icon + label inline */
.toolbar-split-menu .toolbar-dropdown-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 14px;
}

.toolbar-split-menu .toolbar-dropdown-item .cmd-icon {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

.toolbar-split-menu .toolbar-dropdown-item.is-current {
  background: rgba(107, 166, 255, 0.18);
  color: #fff;
}

/* ─── CAD topnav (CadTopnav) — projects+parts site flow ─── */
.topnav-left { display: inline-flex; align-items: center; gap: 14px; }
.topnav-brand { display: inline-flex; align-items: center; gap: 8px; background: none; border: none; cursor: pointer; color: var(--chalk-10, #fff); font-weight: 700; font-size: 14px; padding: 4px 6px; border-radius: var(--r-sm, 4px); }
.topnav-brand:hover { background: var(--chalk-90, #2a2a2a); }
.topnav-brand-mark { width: 22px; height: 22px; background: var(--accent, #b9e84c); border-radius: var(--r-sm, 4px); display: grid; place-items: center; color: var(--chalk-120, #0a0a0a); }
.topnav-brand-mark svg { width: 14px; height: 14px; }
.topnav-brand-dot { color: var(--accent, #b9e84c); }

.topnav-crumbs { display: inline-flex; align-items: center; gap: 6px; font-size: 12px; color: var(--chalk-50, #888); }
.topnav-crumb-link { color: var(--chalk-50, #888); cursor: pointer; padding: 2px 4px; border-radius: var(--r-sm, 4px); background: none; border: none; font: inherit; }
.topnav-crumb-link:hover { color: var(--chalk-10, #fff); }
.topnav-crumb-sep { color: var(--chalk-80, #555); font-size: 11px; }
.topnav-crumb-current { color: var(--chalk-10, #fff); font-weight: 500; cursor: pointer; padding: 2px 4px; border-radius: var(--r-sm, 4px); display: inline-flex; align-items: center; gap: 4px; }
.topnav-crumb-current:hover { background: var(--chalk-90, #2a2a2a); }
.topnav-crumb-edit { opacity: 0.5; cursor: pointer; }
.topnav-crumb-current:hover .topnav-crumb-edit { opacity: 1; }
.topnav-crumb-chev { color: var(--chalk-70, #888); font-size: 10px; }

.topnav-right { margin-left: auto; display: inline-flex; align-items: center; gap: 8px; }

.topnav-pill {
  height: 26px; padding: 0 10px;
  border-radius: 999px;
  background: var(--chalk-100, #1a1a1a); border: 1px solid var(--chalk-90, #2a2a2a);
  color: var(--chalk-50, #888); font-size: 11px;
  display: inline-flex; align-items: center; gap: 6px;
}
.topnav-pill-warn {
  border-color: color-mix(in oklch, oklch(76% 0.16 75deg) 40%, var(--chalk-90, #2a2a2a));
  color: oklch(76% 0.16 75deg);
}
.topnav-pill-dot { font-size: 9px; color: var(--accent, #b9e84c); }
.topnav-pill-warn .topnav-pill-dot { color: oklch(76% 0.16 75deg); }
.topnav-signin-btn {
  height: 28px; padding: 0 14px;
  background: var(--accent, #b9e84c); color: var(--chalk-120, #0a0a0a);
  border: none; border-radius: var(--r-md, 6px);
  font-weight: 600; font-size: 12px;
  cursor: pointer;
}
.topnav-signin-btn:hover { background: var(--lime-10, #d6ff5e); box-shadow: 0 0 0 4px var(--accent-glow, rgba(185,232,76,0.4)); }

/* crumb menu */
.crumb-menu {
  position: fixed; background: var(--chalk-100, #1a1a1a);
  border-radius: var(--r-md, 6px);
  box-shadow: 0 14px 40px rgba(0,0,0,0.55), 0 0 0 1px var(--chalk-90, #2a2a2a);
  padding: 4px; z-index: 50; min-width: 220px;
}
.crumb-menu-item {
  display: block; width: 100%; padding: 7px 10px;
  background: none; border: none;
  text-align: left; color: var(--chalk-30, #e0e0e0);
  border-radius: var(--r-sm, 4px); cursor: pointer;
  font-size: 12px;
}
.crumb-menu-item:hover { background: var(--chalk-90, #2a2a2a); color: var(--chalk-10, #fff); }
.crumb-menu-item.danger { color: oklch(64% 0.21 25deg); }
.crumb-menu-item.danger:hover { background: color-mix(in oklch, oklch(64% 0.21 25deg) 16%, transparent); }

/* cad-sidebar slot (PartSidebar/LooseRail will fill it in Plan 3 Bundle B) */
#cad-sidebar {
  position: fixed;
  top: 44px; left: 0; bottom: 0;
  width: 220px;
  background: var(--chalk-100, #1a1a1a);
  border-right: 1px solid var(--chalk-90, #2a2a2a);
  z-index: 3;
  overflow: hidden;
}
#cad-sidebar.loose { width: 56px; }

/* ─── PartSidebar (CAD in-project) ─── */
.sb-header {
  display: flex; align-items: center; gap: 8px;
  padding: 12px 14px;
  border-bottom: 1px solid var(--chalk-90, #2a2a2a);
  background: none; border-left: none; border-right: none; border-top: none;
  color: var(--chalk-10, #fff);
  cursor: pointer; font-size: 13px; font-weight: 600;
  width: 100%; text-align: left;
}
.sb-header:hover { background: color-mix(in oklch, var(--chalk-90, #2a2a2a) 50%, transparent); }
.sb-back-arrow { color: var(--chalk-70, #888); font-size: 14px; }
.sb-header:hover .sb-back-arrow { color: var(--accent, #b9e84c); }
.sb-section-label {
  display: flex; align-items: center;
  padding: 12px 14px 4px;
  font-size: 10px; text-transform: uppercase;
  letter-spacing: 0.08em; color: var(--chalk-70, #888);
  font-weight: 600;
}
.sb-section-hint { margin-left: auto; font-size: 9px; color: var(--chalk-80, #555); text-transform: none; font-weight: 500; letter-spacing: 0.04em; }
.sb-list { padding: 4px 8px; overflow-y: auto; max-height: calc(100vh - 200px); }

.sb-part {
  position: relative;
  margin-bottom: 6px;
  border-radius: var(--r-md, 6px);
  background: var(--chalk-110, #18181a);
  border: 1px solid color-mix(in oklch, var(--chalk-90, #2a2a2a) 60%, transparent);
  overflow: hidden;
  cursor: pointer;
  transition: all 120ms cubic-bezier(0.22, 1, 0.36, 1);
}
.sb-part:hover { border-color: var(--chalk-80, #555); transform: translateY(-1px); box-shadow: 0 3px 10px rgba(0,0,0,0.3); }
.sb-part.active {
  border-color: var(--accent, #b9e84c);
  box-shadow: 0 0 0 1px var(--accent, #b9e84c), 0 4px 14px var(--accent-glow, rgba(185,232,76,0.4));
}
.sb-part.drop-into { box-shadow: 0 0 0 2px var(--accent, #b9e84c); }
.sb-part.dragging { opacity: 0.4; transform: scale(0.96); }

.sb-thumb-preview {
  aspect-ratio: 4/3;
  background: radial-gradient(ellipse 80% 60% at 50% 40%, var(--chalk-80, #555) 0%, var(--chalk-100, #1a1a1a) 70%, var(--chalk-110, #18181a) 100%);
  background-size: cover; background-position: center;
  display: grid; place-items: center;
}
.sb-part.active .sb-thumb-preview {
  background: radial-gradient(ellipse 80% 60% at 50% 40%, color-mix(in oklch, var(--accent, #b9e84c) 18%, var(--chalk-90, #2a2a2a)) 0%, var(--chalk-100, #1a1a1a) 70%, var(--chalk-110, #18181a) 100%);
}
.sb-thumb-initials { color: var(--chalk-70, #888); font-weight: 700; font-size: 14px; }

.sb-row {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 10px;
  border-top: 1px solid color-mix(in oklch, var(--chalk-90, #2a2a2a) 60%, transparent);
}
.sb-grip { color: var(--chalk-80, #555); opacity: 0; transition: opacity 120ms; cursor: grab; font-size: 11px; }
.sb-part:hover .sb-grip { opacity: 1; }
.sb-part.active .sb-grip { opacity: 0.6; color: var(--accent, #b9e84c); }
.sb-info { flex: 1; min-width: 0; }
.sb-part-name { font-weight: 600; font-size: 12px; color: var(--chalk-10, #fff); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.sb-part.active .sb-part-name { color: var(--accent, #b9e84c); }
.sb-part-meta { font-size: 10px; color: var(--chalk-70, #888); font-family: var(--font-mono, monospace); margin-top: 1px; }
.sb-part.active .sb-part-meta { color: color-mix(in oklch, var(--accent, #b9e84c) 70%, var(--chalk-30, #e0e0e0)); }

.sb-newpart {
  margin: 4px 8px 8px;
  padding: 8px 12px;
  background: none;
  border: 1.5px dashed var(--chalk-90, #2a2a2a);
  border-radius: var(--r-sm, 4px);
  color: var(--chalk-70, #888);
  display: flex; align-items: center; gap: 8px;
  font-size: 12px;
  width: calc(100% - 16px);
  cursor: pointer; transition: all 120ms;
}
.sb-newpart:hover { border-color: var(--accent, #b9e84c); color: var(--accent, #b9e84c); background: color-mix(in oklch, var(--accent, #b9e84c) 14%, transparent); }
.sb-newpart svg { width: 13px; height: 13px; }

/* ─── LooseRail (CAD loose / anon) ─── */
.rail-stack {
  display: flex; flex-direction: column; align-items: center;
  padding: 12px 0; gap: 8px;
  height: 100%;
}
.rail-btn {
  width: 36px; height: 36px;
  background: var(--chalk-90, #2a2a2a); color: var(--chalk-30, #e0e0e0);
  border: 1px solid transparent;
  border-radius: var(--r-md, 6px);
  display: grid; place-items: center; cursor: pointer;
  transition: all 120ms;
}
.rail-btn:hover { background: color-mix(in oklch, var(--accent, #b9e84c) 14%, transparent); color: var(--accent, #b9e84c); border-color: color-mix(in oklch, var(--accent, #b9e84c) 40%, transparent); }
.rail-btn svg { width: 16px; height: 16px; }
.rail-tip {
  writing-mode: vertical-rl; transform: rotate(180deg);
  font-size: 10px; letter-spacing: 0.06em; text-transform: uppercase;
  color: var(--chalk-70, #888); padding: 8px 0;
}
.rail-add {
  margin-top: auto; margin-bottom: 8px;
  width: 36px; height: 36px;
  background: var(--accent, #b9e84c); color: var(--chalk-120, #0a0a0a);
  border: none; border-radius: var(--r-md, 6px);
  display: grid; place-items: center; cursor: pointer;
  transition: all 120ms;
}
.rail-add:hover { background: var(--lime-10, #d6ff5e); box-shadow: 0 0 0 3px var(--accent-glow, rgba(185,232,76,0.4)); }
.rail-add svg { width: 16px; height: 16px; }

.rail-anon-cta {
  margin-top: auto; margin-bottom: 8px;
  width: 44px; padding: 8px 4px;
  background: color-mix(in oklch, var(--accent, #b9e84c) 14%, transparent);
  border: 1px solid var(--accent, #b9e84c);
  border-radius: var(--r-md, 6px);
  display: flex; flex-direction: column; align-items: center; gap: 4px;
  color: var(--accent, #b9e84c);
  font-size: 10px;
}
.rail-anon-title { font-weight: 700; }
.rail-anon-sub { color: var(--chalk-30, #e0e0e0); font-size: 9px; }
.rail-anon-btn {
  width: 28px; height: 28px;
  background: var(--accent, #b9e84c); color: var(--chalk-120, #0a0a0a);
  border: none; border-radius: 50%;
  cursor: pointer; font-weight: 700;
  display: grid; place-items: center;
  transition: all 120ms;
}
.rail-anon-btn:hover { background: var(--lime-10, #d6ff5e); box-shadow: 0 0 0 3px var(--accent-glow, rgba(185,232,76,0.4)); }

/* ─── AddToProjectPicker modal ─── */
.modal-overlay {
  position: fixed; inset: 0; z-index: 200;
  background: rgba(0,0,0,0.5);
  backdrop-filter: blur(4px);
  display: grid; place-items: center;
}
.modal-card {
  background: var(--chalk-100, #1a1a1a);
  border: 1px solid var(--accent, #b9e84c);
  border-radius: 8px;
  padding: 18px 20px;
  width: 380px;
  box-shadow: 0 18px 50px rgba(0,0,0,0.6);
  display: flex; flex-direction: column; gap: 8px;
  max-height: 80vh;
}
.modal-title { font-size: 14px; font-weight: 600; color: var(--chalk-10, #fff); }
.modal-sub   { font-size: 11px; color: var(--chalk-50, #888); margin-bottom: 4px; }
.modal-search {
  background: var(--chalk-110, #18181a); border: 1px solid var(--chalk-90, #2a2a2a);
  padding: 6px 10px; border-radius: var(--r-sm, 4px);
  color: var(--chalk-10, #fff); font: inherit;
}
.modal-list { display: flex; flex-direction: column; gap: 4px; max-height: 220px; overflow-y: auto; padding: 4px 0; }
.modal-item {
  background: var(--chalk-110, #18181a); border: 1px solid var(--chalk-90, #2a2a2a);
  padding: 6px 10px; border-radius: var(--r-sm, 4px);
  color: var(--chalk-30, #e0e0e0); text-align: left;
  cursor: pointer; font-size: 12px;
}
.modal-item:hover { border-color: var(--accent, #b9e84c); color: var(--accent, #b9e84c); background: color-mix(in oklch, var(--accent, #b9e84c) 14%, transparent); }
.modal-item-meta { color: var(--chalk-70, #888); font-size: 11px; }
.modal-create-new {
  margin-top: 4px;
  background: none; border: 1px dashed var(--chalk-90, #2a2a2a);
  padding: 6px 10px; border-radius: var(--r-sm, 4px);
  color: var(--chalk-70, #888); text-align: center;
  cursor: pointer; font-size: 12px;
}
.modal-create-new:hover { border-color: var(--accent, #b9e84c); color: var(--accent, #b9e84c); }
.modal-foot { display: flex; justify-content: flex-end; gap: 8px; margin-top: 6px; }
.modal-btn { padding: 6px 14px; border-radius: var(--r-md, 6px); font-size: 12px; cursor: pointer; }
.modal-cancel { background: var(--chalk-110, #18181a); border: 1px solid var(--chalk-90, #2a2a2a); color: var(--chalk-30, #e0e0e0); }
.modal-cancel:hover { background: var(--chalk-90, #2a2a2a); color: var(--chalk-10, #fff); }

/* ─── App toast (migration success, etc.) ─── */
.app-toast {
  position: fixed; top: 20px; right: 20px;
  z-index: 300;
  padding: 10px 16px;
  background: var(--chalk-100, #1a1a1a);
  border: 1px solid var(--accent, #b9e84c);
  border-radius: 8px;
  color: var(--chalk-10, #fff);
  font-size: 13px; font-weight: 500;
  box-shadow: 0 8px 24px rgba(0,0,0,0.45);
  transition: opacity 600ms;
}
.app-toast-success { border-color: var(--accent, #b9e84c); }
.app-toast-fade { opacity: 0; }