:root {
  --bg:         #131316;   /* darkest — app base / viewport letterbox */
  --surface:    #1f1f23;   /* primary chrome: header, sidebars, footer */
  --surface2:   #2b2b31;   /* inputs, raised buttons */
  --surface3:   #36363d;   /* hover / elevated controls */
  --border:     #34343b;   /* hairline separators */
  --border2:    #43434c;   /* stronger separators, focus-adjacent */
  --text:       #e7e7ea;
  --text-dim:   #9a9aa3;
  --text-mut:   #6c6c76;
  --accent:     #4fd8f5;   /* brand cyan (from the wireframe logo tile) — used sparingly */
  --accent-bg:  rgba(79,216,245,0.13);
  --accent-dim: #3ba6bd;
  --danger:     #ff5564;
  --danger-bg:  rgba(255,85,100,0.13);
  --radius:     6px;
  --radius-sm:  4px;
  --shadow:     0 10px 30px rgba(0,0,0,0.55);
  --sidebar-w: 50px;
  --props-w:   240px;
  --header-h:  48px;
  --footer-h:  40px;
}

/* Light "engineering" theme — a lower-glare, SolidWorks-ish grey palette.
   Opt-in via <html data-theme="light">; dark stays the default. */
:root[data-theme="light"] {
  --bg:         #dfe1e6;   /* viewport letterbox / app base */
  --surface:    #f2f3f5;   /* chrome: header, docks, footer */
  --surface2:   #e6e8ec;   /* inputs, raised buttons */
  --surface3:   #d6d9df;   /* hover / elevated controls */
  --border:     #c3c7cf;
  --border2:    #a9aeb8;
  --text:       #22242a;
  --text-dim:   #565b66;
  --text-mut:   #838a96;
  --accent:     #0a6c86;   /* brand cyan, darkened for light chrome */
  --accent-bg:  rgba(10,108,134,0.12);
  --accent-dim: #09566b;
  --danger:     #d13341;
  --danger-bg:  rgba(209,51,65,0.12);
  --shadow:     0 10px 30px rgba(30,40,60,0.22);
}

/* Viewport HUD chips have hardcoded dark glass backgrounds below; in the light
   theme they go light so the scene-palette badge/hint colours (set inline from
   SCENE_COLORS in gusta3d.js) read correctly. */
:root[data-theme="light"] #measure-bar { background: rgba(242,243,245,0.92); }
:root[data-theme="light"] #infer-hint  { background: rgba(242,243,245,0.94); color: var(--text-dim); }

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

body {
  font-family: 'Barlow', sans-serif;
  background: var(--bg);
  color: var(--text);
  height: 100vh;
  height: 100dvh;   /* track the real visible height, not the layout viewport */
  overflow: hidden;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

/* ── Header ─────────────────────────────────────────────── */
header {
  min-height: var(--header-h);
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  flex-wrap: wrap;          /* wrap on narrow windows instead of overflowing */
  padding: 6px 14px;
  gap: 6px 12px;
  flex-shrink: 0;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}
/* Gustalabs family wordmark: the real mark + two-tone product name. */
.brand-mark { display: block; flex: none; border-radius: 7px; }
.brand-name {
  font-family: 'Barlow', sans-serif;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .01em;
  color: var(--text);
}
.brand-name em { font-style: normal; font-weight: 600; color: var(--accent); }

.header-sep { flex: 1; }

.toolbar-group { display: flex; gap: 3px; }

.tool-btn {
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--text-dim);
  padding: 5px 11px;
  border-radius: var(--radius-sm);
  font-size: 11px;
  font-family: 'Barlow', sans-serif;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.12s, border-color 0.12s, color 0.12s;
}
.tool-btn:hover { background: var(--surface3); border-color: var(--border2); color: var(--text); }
/* Refined "selected" state: tinted fill + accent text, not a loud solid block. */
.tool-btn.is-active {
  background: var(--accent-bg);
  color: var(--accent);
  border-color: var(--accent);
  font-weight: 600;
}

.header-label { font-size: 11px; color: var(--text-dim); flex-shrink: 0; }

/* ── CommandManager ribbon (replaces the left icon rail) ──────────── */
.ribbon-tabs { display: flex; gap: 2px; flex-shrink: 0; }
.ribbon-tab {
  background: none; border: none; border-bottom: 2px solid transparent;
  color: var(--text-dim); font-family: 'Barlow Condensed', sans-serif;
  font-size: 13px; font-weight: 600; letter-spacing: .6px; text-transform: uppercase;
  padding: 6px 13px 5px; cursor: pointer; border-radius: 4px 4px 0 0;
  transition: background .12s, color .12s, border-color .12s;
}
.ribbon-tab:hover { color: var(--text); background: var(--surface2); }
.ribbon-tab.is-active { color: var(--accent); border-bottom-color: var(--accent); }

.ribbon-bar {
  display: flex; align-items: stretch; gap: 12px; flex-wrap: wrap;
  background: var(--surface); border-bottom: 1px solid var(--border);
  padding: 5px 14px; flex-shrink: 0;
}
.ribbon-panels { display: flex; flex: 1; min-width: 0; }
.ribbon-panel { display: none; gap: 4px; flex-wrap: wrap; }
.ribbon-panel.is-active { display: flex; }

.ribbon-btn {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 3px; min-width: 54px; padding: 5px 8px;
  background: var(--surface2); border: 1px solid var(--border); color: var(--text-dim);
  border-radius: var(--radius); cursor: pointer;
  transition: background .12s, border-color .12s, color .12s;
}
.ribbon-btn:hover { background: var(--surface3); border-color: var(--border2); color: var(--text); }
.ribbon-btn:hover .shape-icon { color: var(--accent); }
.ribbon-btn.is-active { background: var(--accent-bg); border-color: var(--accent); color: var(--accent); }
.ribbon-btn.is-active .shape-icon { color: var(--accent); }
.ribbon-btn .shape-icon { height: 20px; }
.ribbon-btn .shape-icon svg { width: 20px; height: 20px; }
.ribbon-label { font-size: 10px; font-weight: 500; white-space: nowrap; line-height: 1; }

/* Persistent context strip on the right: transform / plane / toggles / panels */
.ribbon-context { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.ribbon-group { display: flex; align-items: center; gap: 3px; }
.ribbon-group + .ribbon-group { border-left: 1px solid var(--border); padding-left: 10px; }
.ribbon-toggle {
  background: var(--surface2); border: 1px solid var(--border); color: var(--text-dim);
  font-family: 'Barlow', sans-serif; font-size: 11px; font-weight: 500;
  padding: 5px 10px; border-radius: var(--radius-sm); cursor: pointer;
  transition: background .12s, border-color .12s, color .12s;
}
.ribbon-toggle:hover { background: var(--surface3); border-color: var(--border2); color: var(--text); }
.ribbon-toggle.is-active,
.ribbon-toggle[aria-pressed="true"] { background: var(--accent-bg); border-color: var(--accent); color: var(--accent); }

/* Overflow "⋯" button — folds the context strip into a popover on phone/tablet.
   Hidden on desktop, where the context strip stays inline (unchanged). */
.ribbon-overflow { display: none; }

/* ── Settings dropdown (Nav + Print bed, tucked off the header) ── */
.settings-wrap { position: relative; flex-shrink: 0; }
.settings-menu {
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  z-index: 60;
  background: var(--surface2);
  border: 1px solid var(--border2);
  border-radius: var(--radius);
  padding: 10px 12px;
  display: flex;
  flex-direction: column;
  gap: 5px;
  min-width: 230px;
  box-shadow: var(--shadow);
}
.settings-menu[hidden] { display: none; }
.settings-menu .header-label { margin-top: 4px; }
.settings-menu .header-select { max-width: none; width: 100%; }

/* ── Gusta pill + account chip (Gustalabs family top-bar cluster) ── */
.gusta-pill {
  display: flex;
  align-items: center;
  gap: 5px;
  flex-shrink: 0;
  padding: 4px 10px;
  background: var(--accent-bg);
  border: 1px solid var(--accent-dim);
  border-radius: 8px;
  color: var(--accent);
  font: inherit;
  font-size: 12px;
  cursor: pointer;
}
.gusta-pill .btn-label { color: var(--text); font-weight: 600; }
.gusta-pill:hover { border-color: var(--accent); }
.gusta-pill.is-active { border-color: var(--accent); box-shadow: 0 0 6px var(--accent-bg); }

.account-btn { display: flex; align-items: center; gap: 6px; }
.account-btn.signin { border-color: var(--accent-dim); }
.account-id { display: flex; flex-direction: column; align-items: flex-start; line-height: 1.2; }
.account-name {
  font-weight: 600;
  max-width: 90px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.account-tokens { font-size: 10px; color: var(--text-dim); }
.account-menu { min-width: 264px; }

.menu-heading {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--text-dim);
}
.menu-note { font-size: 11px; font-style: italic; color: var(--text-dim); line-height: 1.4; }
.link-btn {
  background: none;
  border: none;
  padding: 0;
  font: inherit;
  font-size: 11px;
  color: var(--accent);
  cursor: pointer;
  text-decoration: underline;
  align-self: flex-start;
}
.gusta-auth-tabs { display: flex; gap: 6px; margin-bottom: 4px; }
.gusta-auth-tabs .tool-btn { flex: 1; }
.gusta-auth-tabs .tool-btn.is-active { border-color: var(--accent); color: var(--accent); }
#gusta-balance strong { color: var(--accent); font-size: 15px; }
#gusta-buy-row { display: flex; gap: 6px; }
#gusta-buy-row .tool-btn { flex: 1; }

.header-select {
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 5px 8px;
  border-radius: 4px;
  font-size: 11px;
  font-family: 'Barlow', sans-serif;
  cursor: pointer;
  max-width: 200px;
}
.header-select:focus { outline: none; border-color: var(--accent); }

/* ── Custom bed row ──────────────────────────────────────── */
#custom-bed-row {
  display: none;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 6px 14px;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  color: var(--text-dim);
  flex-shrink: 0;
}
#custom-bed-row.visible { display: flex; }

.custom-bed-input {
  width: 60px;
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 3px 6px;
  border-radius: 4px;
  font-size: 11px;
  font-family: 'Barlow', sans-serif;
  text-align: center;
}
.custom-bed-input:focus { outline: none; border-color: var(--accent); }

/* ── Main layout ─────────────────────────────────────────── */
.main { flex: 1; display: flex; overflow: hidden; }

/* ── Left Sidebar ────────────────────────────────────────── */
.sidebar {
  width: var(--sidebar-w);
  background: var(--surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  padding: 6px 0;
  /* Own stacking context above the viewport's floating panels (z 30) so tool
     flyouts pop over the Objects/Params panels — still below modals (z 50+). */
  position: relative;
  z-index: 45;
}

.tool-rail {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 0 6px;
}

/* A tool group: a head button + a flyout that reveals the rest on hover */
.rail-group { position: relative; }

.rail-head {
  position: relative;
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--text-dim);
  width: 38px;
  height: 38px;
  margin: 0 auto;
  border-radius: var(--radius);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.12s, border-color 0.12s, color 0.12s;
}
.rail-head:hover { border-color: var(--border2); background: var(--surface3); color: var(--text); }
.rail-head:hover .shape-icon { color: var(--accent); }
/* The whole group lights up while one of its tools is the active mode */
.rail-group.is-active .rail-head { background: var(--accent-bg); border-color: var(--accent); }
.rail-group.is-active .rail-head .shape-icon { color: var(--accent); }

/* Little corner caret hinting that the group expands */
.rail-caret {
  position: absolute;
  right: 2px;
  bottom: 0px;
  font-size: 10px;
  line-height: 1;
  color: var(--text-mut);
  pointer-events: none;
}

/* Flyout row — appears to the right of the head on hover / keyboard focus */
.rail-flyout {
  position: absolute;
  left: calc(100% + 6px);
  top: 50%;
  transform: translateY(-50%) translateX(-4px);
  display: flex;
  gap: 4px;
  padding: 5px;
  background: rgba(28,28,33,0.94);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border2);
  border-radius: 8px;
  box-shadow: 0 6px 20px rgba(0,0,0,0.45);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.1s, transform 0.1s, visibility 0.1s;
  z-index: 40;
}
.rail-group:hover .rail-flyout,
.rail-group:focus-within .rail-flyout,
.rail-flyout.pinned {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateY(-50%) translateX(0);
}
/* Bridge the 6px gap so the flyout doesn't vanish as the cursor crosses it */
.rail-flyout::before {
  content: '';
  position: absolute;
  left: -8px; top: 0; bottom: 0; width: 8px;
}

/* Icon-only tool buttons in the rail */
.shape-btn,
.rail-btn {
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--text-dim);
  width: 38px;
  height: 38px;
  margin: 0 auto;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background 0.12s, border-color 0.12s, color 0.12s;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.shape-btn:hover,
.rail-btn:hover { border-color: var(--border2); background: var(--surface3); color: var(--text); }
.shape-btn:hover .shape-icon,
.rail-btn:hover .shape-icon { color: var(--accent); }
.shape-btn:active,
.rail-btn:active { background: var(--accent-bg); border-color: var(--accent); }

/* Hairline divider between tool groups and context controls */
.rail-sep {
  height: 1px;
  background: var(--border);
  margin: 4px 6px;
}

/* Toggle-state for icon-only rail buttons (snap/ortho/clay) */
.rail-btn.is-active {
  background: var(--accent-bg);
  border-color: var(--accent);
}
.rail-btn.is-active .shape-icon { color: var(--accent); }

/* Reflect active child state on transform/plane group heads */
.rail-group:has([data-mode].is-active) .rail-head,
.rail-group:has([data-plane].is-active) .rail-head {
  background: var(--accent-bg);
  border-color: var(--accent);
}
.rail-group:has([data-mode].is-active) .rail-head .shape-icon,
.rail-group:has([data-plane].is-active) .rail-head .shape-icon {
  color: var(--accent);
}

/* Panel toggles live in a footer cluster pinned to the bottom of the rail,
   set off from the create tools by a hairline divider. */
.rail-foot {
  margin-top: auto;
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 8px 6px 0;
  border-top: 1px solid var(--border);
}
.rail-btn[aria-pressed="true"] {
  background: var(--accent-bg);
  border-color: var(--accent);
}
.rail-btn[aria-pressed="true"] .shape-icon { color: var(--accent); }

.shape-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 22px;
  color: var(--text-dim);
  transition: color 0.12s;
}
.shape-icon svg { width: 22px; height: 22px; display: block; }

/* ── Floating Scene panel (Objects + Features tabs) ──────── */
#scene-panel {
  display: none;
  position: absolute;
  left: 8px;
  top: 8px;
  width: 200px;
  max-height: calc(100% - 16px);
  background: rgba(28,28,33,0.9);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border2);
  border-radius: var(--radius);
  flex-direction: column;
  overflow: hidden;
  z-index: 30;
  box-shadow: var(--shadow);
}
#scene-panel.visible { display: flex; }

/* Docked as a permanent left column (the SolidWorks FeatureManager spot) */
#scene-panel.docked {
  position: relative; left: auto; top: auto;
  width: 212px; max-height: none; height: 100%; flex-shrink: 0;
  background: var(--surface); -webkit-backdrop-filter: none; backdrop-filter: none;
  border: none; border-right: 1px solid var(--border); border-radius: 0;
  box-shadow: none; z-index: auto;
}

/* ── Right-click context menu ─────────────────────────────────────── */
#ctx-menu {
  display: none; position: fixed; z-index: 80; min-width: 168px;
  background: var(--surface2); border: 1px solid var(--border2);
  border-radius: var(--radius); box-shadow: var(--shadow); padding: 4px;
  font-family: 'Barlow', sans-serif;
}
#ctx-menu .ctx-title {
  font-size: 10px; font-weight: 600; letter-spacing: .5px; text-transform: uppercase;
  color: var(--text-mut); padding: 4px 8px 6px;
}
#ctx-menu .ctx-item {
  display: block; width: 100%; text-align: left; background: none; border: none;
  color: var(--text); font-size: 12px; padding: 6px 8px; border-radius: var(--radius-sm);
  cursor: pointer;
}
#ctx-menu .ctx-item:hover { background: var(--accent-bg); color: var(--accent); }
#ctx-menu .ctx-item.danger:hover { background: var(--danger-bg); color: var(--danger); }
#ctx-menu .ctx-sep { height: 1px; background: var(--border); margin: 4px 6px; }

/* ── Sketch mode ──────────────────────────────────────────────────── */
.ribbon-btn-lead { border-color: var(--border2); }
.ribbon-btn-lead + .ribbon-btn { margin-left: 4px; border-left: 1px solid var(--border); padding-left: 12px; }
#sketch-banner {
  display: none; position: fixed; left: 50%; top: 96px; transform: translateX(-50%);
  z-index: 60; align-items: center; gap: 10px; padding: 7px 10px 7px 12px;
  background: var(--surface2); border: 1px solid var(--accent);
  border-radius: 999px; box-shadow: var(--shadow);
  font: 500 12px 'Barlow', sans-serif; color: var(--text);
}
#sketch-banner .sk-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 3px var(--accent-bg); }
#sketch-banner #sketch-finish {
  background: var(--accent); color: #10131a; border: none; cursor: pointer;
  font: 600 11px 'Barlow', sans-serif; padding: 5px 12px; border-radius: 999px;
}
#sketch-banner #sketch-finish:hover { filter: brightness(1.08); }
/* Subtle vignette so the user feels they're "inside" a sketch */
body.sketch-active .viewport::after {
  content: ''; position: absolute; inset: 0; pointer-events: none; z-index: 20;
  box-shadow: inset 0 0 0 2px var(--accent-bg);
}
#scene-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 4px 6px 0; border-bottom: 1px solid var(--border); flex-shrink: 0;
  gap: 6px;
}
.scene-tabs { display: flex; gap: 2px; }
.scene-tab {
  background: none; border: none; cursor: pointer;
  padding: 7px 10px 8px; margin-bottom: -1px;
  font-family: 'Barlow Condensed', sans-serif; font-size: 12px; font-weight: 600;
  letter-spacing: 1.2px; text-transform: uppercase; color: var(--text-mut);
  border-bottom: 2px solid transparent;
  transition: color 0.12s, border-color 0.12s;
}
.scene-tab:hover { color: var(--text-dim); }
.scene-tab.is-active { color: var(--text); border-bottom-color: var(--accent); }
#scene-close { background: none; border: none; color: var(--text-dim); cursor: pointer; font-size: 12px; align-self: center; }
#scene-close:hover { color: var(--text); }
.scene-body { display: flex; flex-direction: column; flex: 1; min-height: 0; overflow: hidden; }
.scene-body[hidden] { display: none; }

.object-list {
  flex: 1;
  overflow-y: auto;
  padding: 6px 8px 8px;
}

.empty-hint {
  font-size: 11px;
  color: var(--text-dim);
  padding: 6px 4px;
  font-style: italic;
}

.object-item {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 7px 8px;
  border-radius: 5px;
  cursor: pointer;
  transition: background 0.1s;
  font-size: 11px;
  border: 1px solid transparent;
  margin-bottom: 2px;
}
.object-item:hover { background: var(--surface2); }
.object-item.selected { background: var(--accent-bg); border-color: var(--accent); }

.obj-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

.obj-name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.obj-vis {
  background: none;
  border: none;
  color: var(--text-mut);
  cursor: pointer;
  font-size: 12px;
  padding: 0 1px;
  flex-shrink: 0;
  line-height: 0;
  transition: color 0.1s;
  display: inline-flex;
  align-items: center;
}
.obj-vis:hover { color: var(--text); }
.obj-vis svg { width: 15px; height: 15px; display: block; }
.obj-vis.hidden { color: var(--text-mut); opacity: 0.6; }

/* ── Floating Parameters / Features panels (share the objects-panel chrome) ── */
.float-panel {
  display: none;
  position: absolute;
  left: 8px;
  top: 8px;
  width: 220px;
  max-height: calc(100% - 16px);
  background: rgba(28,28,33,0.9);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border2);
  border-radius: var(--radius);
  flex-direction: column;
  overflow: hidden;
  z-index: 30;
  box-shadow: var(--shadow);
}
.float-panel.visible { display: flex; }
.fp-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 9px 12px; border-bottom: 1px solid var(--border); flex-shrink: 0;
  font-family: 'Barlow Condensed', sans-serif; font-size: 12px; font-weight: 600;
  letter-spacing: 1.4px; text-transform: uppercase; color: var(--text-dim);
}
.fp-close { background: none; border: none; color: var(--text-dim); cursor: pointer; font-size: 12px; }
.fp-close:hover { color: var(--text); }
.fp-body { flex: 1; overflow-y: auto; padding: 6px 8px 8px; }
.fp-foot { display: flex; gap: 4px; padding: 7px 8px; border-top: 1px solid var(--border); flex-shrink: 0; }
.fp-input {
  background: var(--surface); border: 1px solid var(--border); color: var(--text);
  border-radius: 4px; padding: 4px 6px; font-size: 11px; min-width: 0;
  font-family: 'JetBrains Mono', ui-monospace, monospace;
}
.fp-input:focus { outline: none; border-color: var(--accent); }
.fp-btn {
  background: var(--surface2); border: 1px solid var(--border); color: var(--text-dim);
  border-radius: 4px; cursor: pointer; font-size: 13px; padding: 0 8px; flex-shrink: 0;
}
.fp-btn:hover { color: var(--accent); border-color: var(--accent); }

/* Parameter rows */
.param-row { display: flex; align-items: center; gap: 5px; padding: 4px 4px; border-radius: 5px; margin-bottom: 2px; font-size: 11px; }
.param-row:hover { background: var(--surface2); }
.param-row.errored .param-val { color: #ff6b6b; }
.param-name { font-weight: 600; color: var(--text); flex: 0 0 auto; max-width: 70px; overflow: hidden; text-overflow: ellipsis; }
.param-expr { flex: 1; background: var(--surface); border: 1px solid transparent; color: var(--text-dim);
  border-radius: 4px; padding: 3px 5px; font-size: 11px; min-width: 0;
  font-family: 'JetBrains Mono', ui-monospace, monospace; }
.param-expr:hover { border-color: var(--border); }
.param-expr:focus { outline: none; border-color: var(--accent); color: var(--text); background: var(--surface); }
.param-val { flex: 0 0 auto; color: var(--accent); font-family: 'JetBrains Mono', ui-monospace, monospace; font-size: 10px; min-width: 34px; text-align: right; }
.param-del { background: none; border: none; color: var(--text-mut); cursor: pointer; font-size: 12px; padding: 0 2px; flex-shrink: 0; }
.param-del:hover { color: #ff6b6b; }

/* Feature-tree rows */
.feat-row { display: flex; align-items: center; gap: 6px; padding: 6px 6px; border-radius: 5px; margin-bottom: 2px;
  cursor: pointer; font-size: 11px; border: 1px solid transparent; }
.feat-row:hover { background: var(--surface2); }
.feat-row.selected { background: var(--accent-bg); border-color: var(--accent); }
.feat-row.child { margin-left: 14px; }
.feat-row.suppressed .feat-name, .feat-row.suppressed .feat-icon { opacity: 0.45; text-decoration: line-through; }
.feat-icon { flex: 0 0 auto; width: 16px; text-align: center; color: var(--text-dim); font-size: 12px; }
.feat-name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; color: var(--text); }
.feat-edit { flex: 0 0 auto; width: 44px; background: var(--surface); border: 1px solid var(--border); color: var(--text);
  border-radius: 4px; padding: 2px 4px; font-size: 10px; font-family: 'JetBrains Mono', ui-monospace, monospace; }
.feat-edit:focus { outline: none; border-color: var(--accent); }
.feat-btn { background: none; border: none; color: var(--text-mut); cursor: pointer; font-size: 12px; padding: 0 2px; flex-shrink: 0; line-height: 0; display: inline-flex; align-items: center; }
.feat-btn:hover { color: var(--text); }
.feat-btn.del:hover { color: #ff6b6b; }
.feat-btn svg { width: 14px; height: 14px; display: block; }

/* ── Groups in the object list ───────────────────────────── */
.group-head {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 6px 6px;
  margin-bottom: 2px;
  border-radius: 5px;
  cursor: pointer;
  border: 1px solid transparent;
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.5px;
  color: var(--text);
  text-transform: uppercase;
}
.group-head:hover { background: var(--surface2); }
.group-head.selected { background: var(--accent-bg); border-color: var(--accent); }
.grp-collapse {
  background: none; border: none; color: var(--text-dim);
  cursor: pointer; font-size: 10px; padding: 0 2px; flex-shrink: 0; line-height: 1;
}
.grp-name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.grp-count {
  font-size: 9px; color: var(--text-dim); background: var(--surface2);
  border-radius: 8px; padding: 1px 6px; flex-shrink: 0; font-weight: 600;
}
.grp-members { padding-left: 12px; border-left: 1px solid var(--border); margin-left: 7px; }

/* ── Viewport ────────────────────────────────────────────── */
.viewport { flex: 1; position: relative; overflow: hidden; }

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

.vp-hint {
  position: absolute;
  bottom: 8px;
  left: 8px;
  font-size: 10px;
  color: rgba(255,255,255,0.35);
  pointer-events: none;
  line-height: 1.7;
}

#drill-panel {
  position: absolute;
  top: 12px;
  right: 12px;
  display: none;
  flex-direction: column;
  gap: 6px;
  padding: 10px 12px;
  background: rgba(20, 22, 28, 0.92);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 8px;
  font-size: 11px;
  color: #cdd2da;
  z-index: 8;
}
#drill-panel.visible { display: flex; }
#drill-panel .drill-title { font-weight: 600; color: var(--accent); margin-bottom: 2px; }
#drill-panel label { display: flex; align-items: center; gap: 6px; }
#drill-panel .drill-check { gap: 5px; }
#drill-panel input[type="number"] { width: 52px; background: #11131a; border: 1px solid rgba(255,255,255,0.15); color: #fff; border-radius: 4px; padding: 2px 4px; }

/* Section / cut-plane controls — floats top-right while Section is active */
#section-menu {
  position: absolute;
  top: 12px;
  right: 12px;
  z-index: 12;
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 196px;
  padding: 10px 12px;
  background: rgba(28,28,33,0.94);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border2);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
#section-menu[hidden] { display: none; }
#section-menu .sp-title {
  font-family: 'Barlow Condensed', sans-serif; font-size: 12px; font-weight: 600;
  letter-spacing: 1.4px; text-transform: uppercase; color: var(--text-dim);
}
#section-menu .header-label { margin-top: 2px; }

#marquee-box {
  position: absolute;
  border: 1px solid var(--accent);
  background: rgba(79, 216, 245, 0.10);
  pointer-events: none;
  display: none;
  z-index: 6;
}
#marquee-box.crossing {
  border-style: dashed;
  border-color: #47ff9a;
  background: rgba(71, 255, 154, 0.12);
}

#kbd-toggle {
  position: absolute;
  top: 8px;
  right: 8px;
  z-index: 5;
  width: 28px;
  height: 28px;
  padding: 0;
  background: rgba(20,20,24,0.72);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-dim);
  cursor: pointer;
  font-size: 14px;
  line-height: 1;
}
#kbd-toggle:hover { color: var(--text); border-color: var(--border2); }

.kbd-panel {
  position: absolute;
  top: 42px;
  right: 8px;
  background: rgba(20,20,24,0.82);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 7px 10px;
  font-size: 10px;
  color: var(--text-dim);
  line-height: 2;
  pointer-events: none;
}
.kbd-panel[hidden] { display: none; }

kbd {
  background: var(--surface2);
  border: 1px solid var(--border2);
  border-radius: 3px;
  padding: 1px 5px;
  font-size: 10px;
  font-family: ui-monospace, 'SF Mono', Menlo, monospace;
  color: var(--text);
}

/* ── Properties Panel ────────────────────────────────────── */
.props-panel {
  width: var(--props-w);
  background: var(--surface);
  border-left: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  flex-shrink: 0;
  position: relative;
  min-width: 160px;
}

.props-scroll {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  min-height: 0;
}

/* Compact top bar with pin + collapse controls (SolidWorks-style contextual panel) */
.props-topbar {
  display: flex; align-items: center; gap: 4px;
  padding: 5px 8px; flex-shrink: 0;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}
.props-topbar .props-title {
  flex: 1; font: 600 11px 'Barlow Condensed', sans-serif;
  letter-spacing: 1px; text-transform: uppercase; color: var(--text-dim);
}
.props-pin {
  background: none; border: none; color: var(--text-dim); cursor: pointer;
  font-size: 12px; line-height: 1; padding: 3px 4px; border-radius: var(--radius-sm);
}
.props-pin:hover { background: var(--surface3); color: var(--text); }
.props-pin.is-active { color: var(--accent); }
.props-pin svg { display: block; }

/* Collapsed state — panel shrinks to a slim vertical reveal tab, viewport widens */
.props-reveal { display: none; }
.props-panel.collapsed { width: 22px; min-width: 22px; cursor: pointer; }
.props-panel.collapsed .props-scroll,
.props-panel.collapsed .props-topbar,
.props-panel.collapsed .props-resize-handle,
.props-panel.collapsed .props-split-handle { display: none; }
.props-panel.collapsed .props-reveal {
  display: flex; align-items: center; justify-content: center; height: 100%;
  writing-mode: vertical-rl; transform: rotate(180deg);
  font: 600 11px 'Barlow Condensed', sans-serif; letter-spacing: 1px;
  text-transform: uppercase; color: var(--text-dim); user-select: none;
}
.props-panel.collapsed:hover .props-reveal { color: var(--text); }

/* Left-edge drag handle for panel width resize */
.props-resize-handle {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 5px;
  cursor: ew-resize;
  z-index: 5;
  transition: background 0.15s;
}
.props-resize-handle:hover { background: var(--border2); }
.props-resize-handle:active,
.props-panel.resizing .props-resize-handle { background: var(--accent); }

/* Vertical drag handle between properties and embedded chat */
.props-split-handle {
  height: 5px;
  flex-shrink: 0;
  background: var(--border);
  cursor: ns-resize;
  transition: background 0.15s;
}
.props-split-handle:hover,
.props-split-handle:active { background: var(--accent); }

/* Embedded chat: override the floating/absolute positioning */
#chat-panel.embedded {
  position: static !important;
  flex: 1;
  width: 100% !important;
  min-height: 100px;
  max-height: none !important;
  height: auto !important;
  right: auto !important;
  bottom: auto !important;
  border: none;
  border-radius: 0;
  box-shadow: none;
  -webkit-backdrop-filter: none;
  backdrop-filter: none;
  background: transparent;
  z-index: auto;
  transition: none;
}
#chat-panel.embedded #chat-head {
  border-top: 1px solid var(--border);
}
#chat-panel.embedded.minimized {
  flex: none;
}

.no-sel {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: var(--text-dim);
  font-size: 11px;
  gap: 8px;
  padding: 24px;
  text-align: center;
}
.no-sel-icon { color: var(--text-mut); opacity: 0.7; }
.no-sel-icon svg { width: 30px; height: 30px; display: block; }

.prop-section {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
}

.prop-section-title {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 1.2px;
  color: var(--text-dim);
  text-transform: uppercase;
  margin-bottom: 8px;
}

.prop-row {
  display: flex;
  align-items: center;
  gap: 5px;
  margin-bottom: 5px;
}
.prop-row:last-child { margin-bottom: 0; }

.axis-label {
  width: 14px;
  font-size: 11px;
  font-weight: 600;
  flex-shrink: 0;
  text-align: center;
}
.axis-x { color: #ff6b6b; }
.axis-y { color: #6bff8a; }
.axis-z { color: #4a9eff; }

.dim-label {
  width: 54px;
  font-size: 10px;
  color: var(--text-dim);
  flex-shrink: 0;
}

.prop-input {
  flex: 1;
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 4px 6px;
  border-radius: 4px;
  font-size: 11px;
  font-family: 'Barlow', sans-serif;
  min-width: 0;
}
.prop-input:focus { outline: none; border-color: var(--accent); }

.unit { font-size: 10px; color: var(--text-dim); width: 18px; flex-shrink: 0; text-align: right; }

.name-input {
  width: 100%;
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 5px 8px;
  border-radius: 4px;
  font-size: 11px;
  font-family: 'Barlow', sans-serif;
}
.name-input:focus { outline: none; border-color: var(--accent); }

.color-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 8px;
}

.color-swatch {
  width: 22px;
  height: 22px;
  border-radius: 4px;
  border: 1px solid var(--border);
  cursor: pointer;
  flex-shrink: 0;
}

.del-btn {
  margin: 10px 12px 12px;
  width: calc(100% - 24px);
  background: var(--danger-bg);
  border: 1px solid transparent;
  color: var(--danger);
  padding: 7px;
  border-radius: var(--radius-sm);
  font-size: 11px;
  font-family: 'Barlow', sans-serif;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.12s, color 0.12s;
  letter-spacing: 0.3px;
}
.del-btn:hover { background: var(--danger); color: #fff; }

.dup-btn {
  margin: 10px 12px 0;
  width: calc(100% - 24px);
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 7px;
  border-radius: var(--radius-sm);
  font-size: 11px;
  font-family: 'Barlow', sans-serif;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.12s, border-color 0.12s, color 0.12s;
  letter-spacing: 0.3px;
}
.dup-btn:hover { background: var(--surface3); border-color: var(--border2); color: var(--text); }

/* ── Footer ──────────────────────────────────────────────── */
footer {
  min-height: var(--footer-h);
  background: var(--surface);
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  padding: 4px 12px;
  gap: 4px 12px;
  flex-shrink: 0;
}

.export-btn {
  background: var(--accent);
  border: none;
  color: #0c0c0c;
  padding: 6px 15px;
  border-radius: var(--radius-sm);
  font-size: 11px;
  font-family: 'Barlow', sans-serif;
  font-weight: 700;
  cursor: pointer;
  letter-spacing: 0.4px;
  transition: filter 0.12s, opacity 0.12s;
  flex-shrink: 0;
}
.export-btn:hover { filter: brightness(1.08); }
.export-btn:disabled { opacity: 0.4; cursor: default; }

/* ── Footer File ▾ menu (opens upward) ───────────────────── */
.menu-wrap { position: relative; flex-shrink: 0; }
.pop-menu {
  position: absolute;
  bottom: calc(100% + 6px);
  left: 0;
  z-index: 60;
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 180px;
  padding: 5px;
  background: var(--surface2);
  border: 1px solid var(--border2);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.pop-menu[hidden] { display: none; }
.menu-item {
  background: none;
  border: none;
  color: var(--text-dim);
  text-align: left;
  padding: 7px 10px;
  border-radius: var(--radius-sm);
  font-size: 11px;
  font-family: 'Barlow', sans-serif;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.1s, color 0.1s;
}
.menu-item:hover { background: var(--surface3); color: var(--text); }
.menu-item svg { vertical-align: -2px; margin-right: 4px; }
/* Account-menu cloud storage: usage bar + per-scene cleanup (mirrors gusta-music). */
.storage-meter {
  height: 7px;
  margin: 4px 0 6px;
  border: 1px solid var(--border2);
  border-radius: 2px;
  overflow: hidden;
  background: var(--bg);
}
.storage-fill {
  height: 100%;
  width: 100%;
  background: linear-gradient(90deg, var(--accent-dim), var(--accent));
  transform-origin: left;
  transform: scaleX(0);
}
.storage-fill.hot { background: var(--danger); }
.storage-row { display: flex; align-items: center; gap: 6px; margin: 2px 0; font-size: 12px; }
.storage-row .storage-name { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.storage-row .storage-size { color: var(--text-mut); font-size: 11px; }

/* Cloud-scene rows in the File menu: open button fills, delete stays compact. */
.song-row { display: flex; align-items: center; gap: 4px; }
.song-row .menu-item { flex: 1; overflow: hidden; text-overflow: ellipsis; }
.menu-sep { height: 1px; background: var(--border); margin: 4px 2px; }

/* ── Footer icon buttons (Claude / Note / Ref) ───────────── */
.footer-sep { width: 1px; height: 18px; background: var(--border); flex-shrink: 0; }
.icon-btn {
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--text-dim);
  width: 30px;
  height: 28px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background 0.12s, border-color 0.12s, color 0.12s;
}
.icon-btn:hover { background: var(--surface3); border-color: var(--border2); color: var(--text); }
.icon-btn.is-active { background: var(--accent-bg); border-color: var(--accent); color: var(--accent); }
.icon-btn svg { width: 16px; height: 16px; display: block; }

.status {
  font-size: 11px;
  color: var(--text-dim);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  min-width: 0;             /* let the status text shrink before the buttons do */
  flex: 1;                  /* fill the middle so the Claude control pins right */
  padding: 0 12px;
  text-align: right;
}

/* Agent co-working entry — the single, understated AI control on the right.
   A faint accent tint marks it without letting it compete with the tools. */
.agent-btn {
  color: var(--accent);
  border-color: color-mix(in srgb, var(--accent) 35%, var(--border));
}
.agent-btn:hover { border-color: var(--accent); color: var(--accent); }
.agent-btn.is-active { background: var(--accent-bg); border-color: var(--accent); }
/* Right-anchored pop menu (Claude), so it doesn't overflow the window edge */
.pop-menu-right { left: auto; right: 0; }

/* ── Scrollbars ──────────────────────────────────────────── */
::-webkit-scrollbar { width: 9px; height: 9px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: var(--surface3);
  border-radius: 6px;
  border: 2px solid transparent;
  background-clip: padding-box;
}
::-webkit-scrollbar-thumb:hover { background: var(--border2); background-clip: padding-box; }

/* ── Header inputs ──────────────────────────────────────── */
.header-input {
  width: 52px;
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 5px 6px;
  border-radius: 4px;
  font-size: 11px;
  font-family: 'Barlow', sans-serif;
  text-align: center;
}
.header-input:focus { outline: none; border-color: var(--accent); }

/* ── Line drawing ────────────────────────────────────────── */
/* is-active is the single canonical "this tool/button is the active mode"
   state, shared by header tool buttons (.tool-btn) and rail tools (.shape-btn). */
.shape-btn.is-active {
  border-color: var(--accent);
  background: var(--accent-bg);
  color: var(--accent);
}
/* Active tool's icon picks up the accent too, matching header tool buttons */
.shape-btn.is-active .shape-icon { color: var(--accent); }

#canvas.line-mode { cursor: crosshair; }

#measure-bar {
  display: none;
  position: absolute;
  bottom: 36px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(26,26,30,0.92);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border2);
  border-radius: var(--radius);
  padding: 7px 12px;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  color: var(--text-dim);
  z-index: 10;
  white-space: nowrap;
  box-shadow: var(--shadow);
}
#measure-bar.visible { display: flex; }

.mb-label { color: var(--accent); font-weight: 600; font-family: 'Barlow Condensed', sans-serif; letter-spacing: 0.5px; }
.mb-sep { color: var(--border); }

#mb-input {
  width: 72px;
  background: var(--surface2);
  border: 1px solid var(--accent);
  color: var(--text);
  padding: 4px 7px;
  border-radius: 4px;
  font-size: 12px;
  font-family: 'Barlow', sans-serif;
  text-align: center;
}
#mb-input:focus { outline: none; }

.mb-btn {
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--text-dim);
  padding: 4px 9px;
  border-radius: 4px;
  font-size: 11px;
  font-family: 'Barlow', sans-serif;
  cursor: pointer;
  transition: all 0.12s;
}
.mb-btn:hover { border-color: var(--accent); color: var(--text); }
.mb-btn.mb-done { border-color: var(--accent); color: var(--accent); }
.mb-btn.mb-done:hover { background: var(--accent-bg); }

#mb-live { color: var(--text); font-weight: 500; min-width: 60px; }

/* ── Negative / subtractive objects ─────────────────────── */
.object-item.negative { border-color: #3a0a0a !important; }
.negative-badge {
  display: inline-block;
  background: var(--danger); color: #fff;
  font-size: 9px; font-weight: 700;
  padding: 1px 4px; border-radius: 3px;
  letter-spacing: 0.5px; vertical-align: middle;
  margin-left: 4px;
}

/* ── Push / Pull mode ────────────────────────────────────── */
#canvas.pushpull-mode { cursor: cell; }

/* ── Push-pull measurement overlay ──────────────────────── */
#pp-label {
  display: none;
  position: absolute;
  background: rgba(12,12,12,0.9);
  border: 1px solid var(--accent);
  border-radius: 4px;
  padding: 3px 8px;
  font-size: 11px;
  font-weight: 600;
  color: var(--accent);
  pointer-events: none;
  z-index: 20;
  white-space: nowrap;
}
#pp-label.visible { display: block; }

/* One-time coachmark for the grouped tool rail */
#rail-coach {
  position: fixed;
  left: 62px;
  top: 150px;
  width: 210px;
  background: var(--surface2);
  border: 1px solid var(--accent);
  border-radius: 8px;
  padding: 12px 14px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.5);
  z-index: 49;
}
#rail-coach strong { display: block; font-size: 12px; color: var(--text); margin-bottom: 5px; }
#rail-coach p { font-size: 11px; color: var(--text-dim); line-height: 1.5; margin: 0 0 10px; }
#rail-coach b { color: var(--text); font-weight: 600; }
#rail-coach .export-btn { width: 100%; padding: 6px; }
/* Little arrow pointing left toward the rail */
#rail-coach .coach-arrow {
  position: absolute;
  left: -7px;
  top: 22px;
  width: 12px;
  height: 12px;
  background: var(--surface2);
  border-left: 1px solid var(--accent);
  border-bottom: 1px solid var(--accent);
  transform: rotate(45deg);
}

/* Inference hint chip — sits just above the measure bar while drawing */
#infer-hint {
  position: absolute;
  left: 50%;
  bottom: 52px;
  transform: translateX(-50%) translateY(6px);
  background: rgba(12,12,14,0.92);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
  border: 1px solid var(--border2);
  border-radius: 999px;
  padding: 3px 12px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.3px;
  color: #cfd6e4;
  pointer-events: none;
  white-space: nowrap;
  opacity: 0;
  z-index: 21;
  transition: opacity 0.1s, transform 0.1s;
}
#infer-hint.on { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ── Reference panel ─────────────────────────────────────── */
#ref-panel {
  display: none;
  position: absolute;
  left: 8px;
  bottom: 8px;
  width: 230px;
  background: rgba(28,28,33,0.9);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border2);
  border-radius: var(--radius);
  flex-direction: column;
  z-index: 30;
  box-shadow: var(--shadow);
}
#ref-panel.visible { display: flex; }
#ref-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 9px 12px; border-bottom: 1px solid var(--border);
  font-family: 'Barlow Condensed', sans-serif; font-size: 12px; font-weight: 600;
  letter-spacing: 1.4px; text-transform: uppercase; color: var(--text-dim);
}
#ref-close { background: none; border: none; color: var(--text-dim); cursor: pointer; font-size: 12px; }
#ref-close:hover { color: var(--text); }
#ref-body { padding: 9px 11px 11px; }
.ref-label { display: block; font-size: 10px; color: var(--text-dim); margin: 8px 0 3px; letter-spacing: 0.3px; }
.ref-field {
  width: 100%; background: var(--surface2); border: 1px solid var(--border); color: var(--text);
  padding: 5px 7px; border-radius: 4px; font-size: 11px; font-family: 'Barlow', sans-serif;
}
.ref-field:focus { outline: none; border-color: var(--accent); }

/* ── Claude chat panel (co-working bridge) ───────────────── */
#chat-panel {
  display: none;
  position: absolute;
  right: 12px;
  bottom: 12px;
  width: 330px;
  max-width: calc(100% - 24px);
  height: 440px;
  max-height: calc(100% - 24px);
  background: rgba(26,26,30,0.86);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border2);
  border-radius: var(--radius);
  flex-direction: column;
  z-index: 30;
  box-shadow: 0 4px 24px rgba(0,0,0,0.5);
  transition: height 0.18s ease, width 0.18s ease;
}
#chat-panel.visible { display: flex; }

/* Docked: snap full-height to the right edge, abutting the properties panel. */
#chat-panel.docked {
  top: 0;
  right: 0;
  bottom: 0;
  width: 340px;
  height: auto;
  border-radius: 0;
  border-top: none;
  border-right: none;
  border-bottom: none;
  box-shadow: -6px 0 24px rgba(0,0,0,0.45);
}

/* Minimized: collapse to just the header bar. */
#chat-panel.minimized #chat-msgs,
#chat-panel.minimized #chat-busy,
#chat-panel.minimized #chat-input-row { display: none; }
#chat-panel.minimized {
  height: auto;
  bottom: 12px;
}
#chat-panel.docked.minimized { top: auto; height: auto; }

#chat-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 11px;
  border-bottom: 1px solid var(--border);
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 1.4px;
  text-transform: uppercase;
  color: var(--text-dim);
  cursor: default;
}
/* Panel title: "Gusta" + a dim provider sub-label (Gusta Cloud / local model). */
#chat-head > span:first-child { text-transform: none; letter-spacing: .02em; color: var(--text); font-family: 'Barlow', sans-serif; }
#chat-head > span:first-child strong { font-weight: 700; }
#chat-provider-label { font-weight: 400; font-size: 10px; color: var(--text-dim); margin-left: 2px; }
/* Pulse the title dot while Gusta is working so the panel never looks frozen. */
#chat-panel.busy #chat-head > span:first-child::before {
  content: '';
  display: inline-block;
  width: 7px; height: 7px;
  margin-right: 6px;
  border-radius: 50%;
  background: var(--accent);
  animation: chat-pulse 1s ease-in-out infinite;
}
/* Live API-cost readout: "this run · Σ session total". Sits next to the title. */
.chat-cost {
  margin-left: 8px;
  font-family: 'Barlow', sans-serif;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0;
  text-transform: none;
  color: var(--text-dim);
  cursor: pointer;
  white-space: nowrap;
  flex-shrink: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
}
.chat-cost:hover { color: var(--accent); }
/* Provider + model selector row, under the header */
#chat-model-row {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 11px;
  border-bottom: 1px solid var(--border);
}
#chat-model-row select {
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--text);
  font-family: 'Barlow', sans-serif;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0;
  text-transform: none;
  padding: 4px 6px;
  border-radius: 4px;
  cursor: pointer;
  height: 26px;
}
#chat-provider { flex: 0 0 auto; }
#chat-model, #chat-ollama-model { flex: 1 1 auto; min-width: 0; }   /* model name gets the room */
#chat-model-row select:hover { border-color: var(--border2); }
#chat-model-row select:focus { outline: none; border-color: var(--accent); }
.chat-hbtn {
  background: none; border: none; color: var(--text-dim);
  cursor: pointer; font-size: 12px; line-height: 1;
  padding: 2px 4px; border-radius: 4px;
}
.chat-hbtn:hover { color: var(--text); background: var(--surface2); }
/* Kit-mode toggle — a small pill in the chat header */
.chat-toggle {
  margin-right: 8px;
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--text-dim);
  font-family: 'Barlow', sans-serif;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 1px;
  padding: 2px 7px;
  border-radius: 4px;
  cursor: pointer;
}
.chat-toggle:hover { color: var(--text); border-color: var(--border2); }
.chat-toggle[aria-pressed="true"] {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
/* Dock picker — one click sets an explicit position (no blind cycling) */
.chat-dockpick { display: inline-flex; gap: 1px; }
.chat-dockpick button.is-active { color: var(--accent); }

#chat-msgs {
  flex: 1;
  overflow-y: auto;
  padding: 9px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 11px;
}
.chat-msg {
  padding: 6px 9px;
  border-radius: 7px;
  line-height: 1.45;
  white-space: pre-wrap;
  word-break: break-word;
  max-width: 92%;
}
.chat-user   { background: var(--accent-bg); border: 1px solid rgba(79,216,245,0.28); align-self: flex-end; }
.chat-claude { background: var(--surface2); border: 1px solid var(--border); align-self: flex-start; }
.chat-info   { color: var(--text-dim); font-style: italic; align-self: center; font-size: 10px; text-align: center; }
/* Live bubble while tokens stream in — replaced by the final push()ed message. */
.chat-streaming { opacity: 0.75; }

#chat-busy {
  display: none;
  align-items: center;
  gap: 7px;
  padding: 6px 11px;
  font-size: 10px;
  color: var(--accent);
  border-top: 1px solid var(--border);
  background: var(--accent-bg);
}
#chat-busy.on { display: flex; }
#chat-busy-text { font-weight: 600; white-space: nowrap; }
#chat-busy-time { color: var(--text-dim); font-variant-numeric: tabular-nums; }
#chat-busy-act {
  margin-left: auto;
  color: var(--text-dim);
  font-style: italic;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 58%;
  text-align: right;
}
/* Flash the action line each time a new action lands — visible proof of life. */
#chat-busy-act.tick { color: var(--accent); font-style: normal; }

.chat-spinner {
  flex-shrink: 0;
  width: 11px; height: 11px;
  border: 2px solid var(--accent-bg);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: chat-spin 0.7s linear infinite;
}
@keyframes chat-spin { to { transform: rotate(360deg); } }
@keyframes chat-pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%      { opacity: 0.35; transform: scale(0.7); }
}

#chat-input-row { padding: 8px; border-top: 1px solid var(--border); }
#chat-input {
  width: 100%;
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 7px 9px;
  border-radius: 5px;
  font-size: 11px;
  font-family: 'Barlow', sans-serif;
}
#chat-input:focus { outline: none; border-color: var(--accent); }

/* ── Save dialog ─────────────────────────────────────────── */
#save-modal {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.55);
  z-index: 50;
  align-items: center;
  justify-content: center;
}
#save-modal.visible { display: flex; }

#save-box {
  width: 360px;
  max-width: 90vw;
  background: var(--surface);
  border: 1px solid var(--border2);
  border-radius: var(--radius);
  padding: 16px 16px 14px;
  box-shadow: var(--shadow);
}
#save-title {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 1.4px;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 12px;
}
.save-label {
  display: block;
  font-size: 10px;
  color: var(--text-dim);
  letter-spacing: 0.5px;
  margin: 9px 0 3px;
}
.save-field {
  width: 100%;
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 7px 9px;
  border-radius: 5px;
  font-size: 12px;
  font-family: 'Barlow', sans-serif;
}
.save-field:focus { outline: none; border-color: var(--accent); }
#save-hint { font-size: 10px; color: var(--text-dim); margin-top: 8px; line-height: 1.4; }
#save-err  { font-size: 11px; color: var(--danger); margin-top: 8px; min-height: 0; }
#save-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 14px;
}
#save-cancel { padding: 7px 14px; }

/* ── Open dialog (bridge-backed file picker) ──────────────── */
#open-modal {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.55);
  z-index: 50;
  align-items: center;
  justify-content: center;
}
#open-modal.visible { display: flex; }
#open-box {
  width: 400px;
  max-width: 90vw;
  background: var(--surface);
  border: 1px solid var(--border2);
  border-radius: var(--radius);
  padding: 16px 16px 14px;
  box-shadow: var(--shadow);
}
#open-title {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 1.4px;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 12px;
}
#open-list {
  margin-top: 9px;
  max-height: 260px;
  overflow-y: auto;
  border: 1px solid var(--border);
  border-radius: 5px;
  background: var(--surface2);
}
.open-file {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 10px;
  padding: 7px 10px;
  font-size: 12px;
  color: var(--text);
  cursor: pointer;
  border-bottom: 1px solid var(--border);
}
.open-file:last-child { border-bottom: none; }
.open-file:hover { background: var(--accent); color: #fff; }
.open-file .open-file-meta { font-size: 10px; color: var(--text-dim); flex-shrink: 0; }
.open-file:hover .open-file-meta { color: rgba(255,255,255,0.8); }
.open-file-empty { padding: 14px 10px; font-size: 11px; color: var(--text-dim); font-style: italic; }
#open-hint { font-size: 10px; color: var(--text-dim); margin-top: 8px; line-height: 1.4; }
#open-err  { font-size: 11px; color: var(--danger); margin-top: 8px; min-height: 0; }
#open-cancel, #open-refresh { padding: 7px 14px; }

/* ── Drag-and-drop overlay ────────────────────────────────── */
#drop-overlay {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 100;
  align-items: center;
  justify-content: center;
  background: rgba(10,12,16,0.72);
  pointer-events: none;
}
#drop-overlay.visible { display: flex; }
#drop-box {
  text-align: center;
  padding: 40px 64px;
  border: 2px dashed var(--accent);
  border-radius: 14px;
  background: rgba(74,158,255,0.08);
}
#drop-icon {
  font-size: 52px;
  line-height: 1;
  color: var(--accent);
  margin-bottom: 14px;
}
#drop-text {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 22px;
  font-weight: 600;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--text);
}
#drop-sub { font-size: 12px; color: var(--text-dim); margin-top: 6px; letter-spacing: 0.5px; }

/* ── Profile wizard ──────────────────────────────────────── */
#pw-modal {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  z-index: 60;
  align-items: center;
  justify-content: center;
}
#pw-modal.visible { display: flex; }
#pw-box {
  width: 480px;
  max-width: 92vw;
  background: var(--surface);
  border: 1px solid var(--border2);
  border-radius: var(--radius);
  padding: 16px 16px 14px;
  box-shadow: var(--shadow);
}
#pw-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 6px;
}
#pw-title {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 1.4px;
  text-transform: uppercase;
  color: var(--text-dim);
}
#pw-steps { display: flex; gap: 6px; }
.pw-step {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--text-dim);
  padding: 2px 9px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface2);
}
.pw-step.done { color: var(--accent); border-color: var(--accent); }
.pw-step.active {
  color: #0c0c0e;
  background: var(--accent);
  border-color: var(--accent);
}
#pw-sub { font-size: 10px; color: var(--text-dim); margin-bottom: 10px; line-height: 1.4; }
#pw-stage {
  position: relative;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
}
#pw-svg { display: block; width: 100%; height: auto; background: #101015; }
.pw-axis {
  position: absolute;
  font-size: 9px;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--text-dim);
  pointer-events: none;
}
#pw-axis-x { right: 8px; bottom: 6px; }
#pw-axis-y { left: 6px; top: 6px; }
#pw-svg .pw-poly { fill: rgba(79,216,245,0.12); stroke: var(--accent); stroke-width: 1.5; }
#pw-svg .pw-poly-bad { fill: rgba(255,90,90,0.10); stroke: var(--danger); }
#pw-svg .pw-cross { stroke: var(--danger); stroke-width: 2.5; pointer-events: none; }
#pw-svg .pw-vert {
  fill: var(--surface);
  stroke: var(--accent);
  stroke-width: 1.5;
  cursor: grab;
}
#pw-svg .pw-vert:hover { fill: var(--accent); }
#pw-svg .pw-vert.dragging { cursor: grabbing; fill: var(--accent); }
#pw-svg .pw-edge-hit { fill: none; stroke: transparent; stroke-width: 12; cursor: copy; }
#pw-err { font-size: 11px; color: var(--danger); margin-top: 8px; min-height: 14px; }
#pw-actions { display: flex; align-items: center; gap: 8px; margin-top: 6px; }
#pw-cancel, #pw-reset, #pw-back, #pw-next { padding: 7px 14px; }

/* ── Toggle row in props panel ───────────────────────────── */
.toggle-row { display: flex; align-items: center; gap: 7px; margin-top: 7px; }
.toggle-row input[type=checkbox] { accent-color: var(--danger); width:13px; height:13px; cursor:pointer; flex-shrink:0; }
.toggle-row label { font-size: 10px; color: var(--text-dim); cursor: pointer; line-height: 1.3; }

/* ── Command palette (Ctrl+K) — spec-driven access to every tool ── */
.palette-backdrop {
  position: fixed; inset: 0; z-index: 200;
  display: none; justify-content: center; align-items: flex-start;
  background: rgba(0,0,0,0.45); backdrop-filter: blur(2px);
}
.palette-backdrop.is-open { display: flex; }
.palette {
  margin-top: 9vh; width: min(560px, 92vw); max-height: 74vh;
  display: flex; flex-direction: column;
  background: var(--surface); border: 1px solid var(--border2);
  border-radius: var(--radius); box-shadow: var(--shadow); overflow: hidden;
}
.palette-search {
  padding: 12px 14px; border: none; border-bottom: 1px solid var(--border);
  background: var(--surface); color: var(--text); font: inherit; font-size: 13px; outline: none;
}
.palette-search::placeholder { color: var(--text-mut); }
.palette-list { overflow-y: auto; padding: 4px; }
.palette-row {
  display: flex; align-items: baseline; gap: 10px; padding: 7px 10px;
  border-radius: var(--radius-sm); cursor: pointer; min-width: 0;
}
.palette-row:hover { background: var(--surface2); }
.palette-row.is-active { background: var(--accent-bg); }
.palette-row-name { font-size: 12.5px; font-weight: 600; color: var(--text); white-space: nowrap; }
.palette-row.is-active .palette-row-name { color: var(--accent); }
.palette-row-sum {
  font-size: 11px; color: var(--text-dim);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.palette-form { display: flex; flex-direction: column; overflow-y: auto; padding: 10px 14px 14px; }
.palette-form-head { display: flex; align-items: center; gap: 8px; }
.palette-back {
  border: 1px solid var(--border); background: var(--surface2); color: var(--text-dim);
  border-radius: var(--radius-sm); cursor: pointer; padding: 2px 8px; font-size: 12px;
}
.palette-back:hover { background: var(--surface3); color: var(--text); }
.palette-form-title { font-size: 14px; font-weight: 700; color: var(--accent); }
.palette-summary { font-size: 11px; color: var(--text-dim); line-height: 1.45; margin: 8px 0 4px; }
.palette-fields { display: flex; flex-direction: column; gap: 8px; margin-top: 6px; }
.palette-field { display: flex; flex-direction: column; gap: 3px; }
.palette-field-name { font-size: 11px; font-weight: 600; color: var(--text); }
.palette-field-hint { font-size: 10px; color: var(--text-mut); line-height: 1.4; }
.palette-field input, .palette-field textarea, .palette-field select {
  background: var(--surface2); border: 1px solid var(--border); border-radius: var(--radius-sm);
  color: var(--text); font: inherit; font-size: 12px; padding: 5px 8px; outline: none;
  font-family: ui-monospace, monospace; resize: vertical;
}
.palette-field input:focus, .palette-field textarea:focus, .palette-field select:focus {
  border-color: var(--accent-dim);
}
.palette-field .is-invalid, .palette-field input.is-invalid, .palette-field textarea.is-invalid {
  border-color: var(--danger); background: var(--danger-bg);
}
.palette-actions { display: flex; align-items: center; gap: 10px; margin-top: 12px; }
.palette-run {
  border: none; border-radius: var(--radius-sm); cursor: pointer;
  background: var(--accent); color: #16160a; font: inherit; font-size: 12px; font-weight: 700;
  padding: 6px 18px;
}
.palette-run:hover { background: var(--accent-dim); }
.palette-run:disabled { opacity: 0.5; cursor: default; }
.palette-hint { font-size: 10px; color: var(--text-mut); }
.palette-result {
  margin: 10px 0 0; padding: 8px 10px; max-height: 220px; overflow: auto;
  background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius-sm);
  color: var(--text-dim); font-size: 11px; line-height: 1.45; white-space: pre-wrap; word-break: break-word;
}
.palette-result.is-error { color: var(--danger); border-color: var(--danger); background: var(--danger-bg); }
.palette-images { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 8px; }
.palette-images img {
  max-width: 100%; border: 1px solid var(--border); border-radius: var(--radius-sm);
}

/* ── Touch & small screens (phone 390px / iPad 1024px) ───────────── */
/* Gestures must reach the app, not scroll/zoom the page. OrbitControls
   sets touch-action:none itself; this covers it before the module loads. */
#canvas { touch-action: none; -webkit-touch-callout: none; }
.props-resize-handle, .props-split-handle { touch-action: none; }

/* Fixed-width floaters may never exceed the screen. */
.float-panel, #scene-panel, #ref-panel, #drill-panel, #section-menu,
.settings-menu, .pop-menu, #chat-panel, #chat-panel.docked {
  max-width: calc(100vw - 24px);
}
.settings-menu { max-height: calc(100dvh - var(--header-h) - 24px); overflow-y: auto; }
#save-box, #open-box, #pw-box { max-height: calc(100dvh - 24px); overflow-y: auto; }
#measure-bar { max-width: calc(100% - 12px); overflow-x: auto; }

@media (max-width: 700px) {
  .main { position: relative; }
  /* Side panels become overlays so the canvas keeps its real estate.
     Properties still auto-collapses to its 22px reveal tab when nothing
     is selected; the scene dock starts closed (gusta3d.js). */
  .props-panel {
    position: absolute; top: 0; right: 0; bottom: 0; z-index: 40;
    box-shadow: var(--shadow);
  }
  #scene-panel.docked {
    position: absolute; top: 0; left: 0; bottom: 0; z-index: 40;
    height: auto; box-shadow: var(--shadow);
    border-right: 1px solid var(--border);
  }
  header { padding: 6px 8px; gap: 4px 8px; }
  footer { padding: 4px 8px; gap: 4px 8px; }
}

/* Ribbon: one horizontally-scrollable row instead of a tall wrap — on any
   narrow window, and on touch screens up to iPad landscape (whose bigger
   coarse-pointer buttons no longer fit on one wrapped line).
   (The header keeps wrapping — its dropdown menus must not be clipped.) */
@media (max-width: 700px), (pointer: coarse) and (max-width: 1100px) {
  /* COMPACT RIBBON: only the active tab's tools stay inline (they scroll if
     needed); everything else — transform / plane / snap / panels — folds into
     the "⋯" overflow popover so the bar no longer needs long sliding. */
  .ribbon-bar { flex-wrap: nowrap; overflow: visible; position: relative; gap: 6px; }
  .ribbon-panels { flex: 1 1 auto; min-width: 0; overflow-x: auto; scrollbar-width: thin; }
  .ribbon-panel { flex-wrap: nowrap; flex: none; }

  .ribbon-overflow {
    display: flex; align-items: center; justify-content: center; flex: none;
    min-width: 44px; min-height: 40px; align-self: center;
    background: var(--surface2); border: 1px solid var(--border); color: var(--text);
    border-radius: var(--radius); cursor: pointer; font-size: 20px; line-height: 1;
  }
  .ribbon-overflow[aria-expanded="true"] { background: var(--accent-bg); border-color: var(--accent); color: var(--accent); }

  /* The context strip becomes a dropdown anchored below the "⋯" button. */
  .ribbon-context {
    display: none; position: absolute; top: calc(100% + 4px); right: 6px; z-index: 45;
    flex-direction: column; align-items: stretch; gap: 8px;
    background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
    box-shadow: var(--shadow); padding: 10px;
    max-width: calc(100vw - 24px); max-height: calc(100dvh - var(--header-h) - 24px); overflow-y: auto;
  }
  .ribbon-context.open { display: flex; }
  .ribbon-context .ribbon-group { flex-wrap: wrap; }
  .ribbon-context .ribbon-group + .ribbon-group {
    border-left: none; border-top: 1px solid var(--border); padding-left: 0; padding-top: 8px;
  }
}

@media (pointer: coarse) {
  /* Finger-sized targets for the primary chrome (≈40px min). */
  .ribbon-btn { min-width: 62px; padding: 8px 10px; gap: 4px; }
  .ribbon-tab { padding: 10px 13px 9px; }
  .tool-btn, .ribbon-toggle { padding: 9px 12px; }
  .export-btn { padding: 10px 15px; }
  .menu-item { padding: 10px 12px; }
  .icon-btn { width: 40px; height: 38px; }
  #kbd-toggle { width: 38px; height: 38px; }
  .props-pin { padding: 7px 8px; }
  .props-panel.collapsed { width: 30px; min-width: 30px; }
  .props-resize-handle { width: 14px; }
  .props-split-handle { height: 12px; }
  .scene-tab { padding: 10px 12px 11px; }
  .header-select, .fp-input { padding: 8px; }
  /* The hint describes mouse bindings — wrong and wasted space on touch. */
  .vp-hint { display: none; }
}
