/* ══════════════════════════════════════════════════════════════════
   app.css — Happy Light 3D Builder.

   Same warm-ink token set as the rest of the suite (Maths, Journal,
   Pixel Studio), so theme.js's [data-theme] switch drives this page
   too. Dark is the bare :root; light overrides only what changes.
   The 3D view reads its colours from the --vp-* / --grid-* tokens
   through getComputedStyle, so one table drives both halves.

   The CSP is style-src 'self' with no 'unsafe-inline': nothing in the
   markup sets a style attribute; scripts use the CSSOM only.
   ══════════════════════════════════════════════════════════════════ */
:root{
  --bg:#0b0a0d; --bg-2:#16131a;
  --panel:rgba(29,25,34,.88); --panel-solid:#1d1922;
  --line:rgba(184,175,164,.20); --line-hot:rgba(245,158,11,.45);
  --ink:#f5f1ea; --ink-dim:#b8afa4; --ink-faint:#6b635a;
  --brand:#f59e0b; --brand-2:#a78bfa;
  --ok:#4ee8a5; --warn:#fbbf24; --bad:#f87171;
  --surf:rgba(43,37,51,.72);
  --shadow:4px 4px 0 rgba(0,0,0,.45);
  --logo-glow:1; --logo-glow-color:#f59e0b; --logo-bulb:#d9a441;
  --logo-glass-hi:#fffdf6; --logo-glass-lo:#f8e3b6; --logo-face:#8a6a3b;
  --font:"Inter Variable","Inter",ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --r:12px;

  /* 3D view */
  --vp-bg:#100d16;
  --plate:#1f1a27;
  --grid-minor:#4a4252;
  --grid-major:#7a6f84;
  --axis-x:#e05b7a; --axis-y:#9ec95a; --axis-z:#48c8dd;
  --ruler-bg:rgba(22,19,26,.92); --ruler-ink:#b8afa4;
  --body:#d9a441; --body-sel:#f59e0b; --body-alt:#7fb8d8;
  --sketch:#48c8dd; --sketch-sel:#f59e0b; --measure:#f07ccf;
}
:root[data-theme="light"]{
  --bg:#faf8f4; --bg-2:#f1ece2;
  --panel:rgba(255,253,247,.94); --panel-solid:#fffdf7;
  --line:rgba(90,74,54,.22); --line-hot:rgba(180,83,9,.42);
  --ink:#241f18; --ink-dim:#5b5145; --ink-faint:#7d7264;
  --brand:#b45309; --brand-2:#6d28d9;
  --ok:#047857; --warn:#8c6510; --bad:#b91c1c;
  --surf:rgba(241,236,226,.80);
  --shadow:4px 4px 0 rgba(90,74,54,.22);
  --logo-glow:0; --logo-bulb:#a86f18;
  --logo-glass-hi:#fffaec; --logo-glass-lo:#f2d79c; --logo-face:#6b4d22;

  --vp-bg:#efe9de;
  --plate:#fbf8f2;
  --grid-minor:#d6ccbb;
  --grid-major:#a89a84;
  --axis-x:#c0264f; --axis-y:#4d7a1a; --axis-z:#0e7c90;
  --ruler-bg:rgba(255,253,247,.94); --ruler-ink:#5b5145;
  --body:#c89a52; --body-sel:#b45309; --body-alt:#2b6c8f;
  --sketch:#0e7c90; --sketch-sel:#b45309; --measure:#a8288a;
}

*{box-sizing:border-box}
[hidden]{display:none !important}
html{color-scheme:dark;height:100%}
:root[data-theme="light"]{color-scheme:light}
body{
  margin:0;background:var(--vp-bg);color:var(--ink);
  font-family:var(--font);font-size:14px;line-height:1.45;
  -webkit-font-smoothing:antialiased;
  height:100dvh;overflow:hidden;overscroll-behavior:none;
}
a{color:var(--brand)}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{
  outline:2px solid var(--brand);outline-offset:2px;border-radius:4px;
}
.skip{position:absolute;left:-9999px;top:0;background:var(--panel-solid);
  color:var(--ink);padding:.6rem .9rem;z-index:80;border-radius:0 0 var(--r) 0}
.skip:focus{left:0}

/* ── layout ── */
/* The view fills everything between the top bar and the status line; the
   floating panels (.fp-layer) share its grid cell, above it. */
.app{display:grid;height:100dvh;
  grid-template-columns:minmax(0,1fr);
  grid-template-rows:auto minmax(0,1fr) auto;
  grid-template-areas:"top" "view" "status"}

.top{grid-area:top;display:flex;align-items:center;gap:.6rem;flex-wrap:wrap;
  padding:.4rem .7rem;background:var(--panel-solid);border-bottom:1px solid var(--line);z-index:30}
.home{text-decoration:none;color:inherit;display:flex;align-items:center}
.wordmark{font-weight:700;letter-spacing:-.03em;line-height:1;
  display:inline-flex;flex-direction:column;align-items:center;gap:.25rem;font-size:.85rem}
.wordmark .hl-lockup{height:1.7em;width:auto;display:inline-block;color:var(--ink);flex:none}
.wm-b{color:var(--ink-dim);font-size:.55rem;font-weight:700;
  letter-spacing:.22em;text-indent:.22em;text-transform:uppercase;line-height:1}
.top .spacer{flex:1}
.toolbar{display:flex;align-items:center;gap:.25rem;flex-wrap:wrap}
.sep{width:1px;align-self:stretch;background:var(--line);margin:0 .2rem}

.view{grid-area:view;position:relative;min-width:0;min-height:0;overflow:hidden}
.status{grid-area:status;display:flex;gap:1rem;align-items:center;flex-wrap:wrap;
  padding:.25rem .8rem;font-size:.75rem;color:var(--ink-dim);
  background:var(--panel-solid);border-top:1px solid var(--line);font-variant-numeric:tabular-nums}
.status .ok{color:var(--ok)} .status .warn{color:var(--warn)} .status .bad{color:var(--bad)}
.status .grow{flex:1}

.sec{padding:.6rem .7rem;border-bottom:1px solid var(--line)}
.sec h2{margin:0 0 .45rem;font-size:.66rem;letter-spacing:.09em;text-transform:uppercase;
  color:var(--ink-faint);font-weight:700;display:flex;align-items:center;gap:.4rem}
.sec h2 .grow{flex:1}
.hint{margin:.3rem 0 0;font-size:.74rem;color:var(--ink-faint)}
.hint kbd,.kbd{font:600 .7rem var(--mono);padding:0 .25rem;border:1px solid var(--line);border-radius:.25rem;color:var(--ink-dim)}

/* ── viewport ── */
.vp-canvas{position:absolute;inset:0;width:100%;height:100%;display:block;touch-action:none;outline:none}
.vp-canvas:focus-visible{box-shadow:inset 0 0 0 2px var(--brand)}
.vp-overlay{position:absolute;inset:0;pointer-events:none;overflow:hidden}
.vp-rulers{position:absolute;inset:0;width:100%;height:100%;pointer-events:none}
.vp-label{position:absolute;left:0;top:0;white-space:nowrap;will-change:transform;
  font:500 11px var(--mono);color:var(--ink-dim);margin:-.6em 0 0 0}
.vp-tick.x{translate:-50% .2em}
.vp-tick.y{translate:-100% -.1em;padding-right:.2em}
.vp-tick.axis{font-weight:700;color:var(--ink)}
.vp-dim{background:var(--panel-solid);color:var(--ink);padding:.05rem .3rem;border-radius:.3rem;
  border:1px solid var(--line);translate:-50% -50%;margin:0;font-size:11px}
.vp-dim.edit{pointer-events:auto;cursor:text;border-color:var(--line-hot)}
.vp-dim.edit:hover{border-color:var(--brand);color:var(--brand)}
.vp-dim.measure{border-color:var(--measure);color:var(--ink)}
.vp-dim.sel{border-color:var(--brand)}
.vp-dim.plane{border-color:var(--sketch);color:var(--sketch);font-weight:600}
.vp-dim.plane.sel{border-color:var(--sketch-sel);color:var(--sketch-sel)}
.sec.dlg{border-left:3px solid var(--brand)}
.sec.dlg .seg{display:flex;margin:.2rem 0 .4rem}
.sec.dlg .seg button{flex:1}
.vp-dimedit{position:absolute;z-index:20;translate:-50% -50%;width:7rem;
  font:600 12px var(--mono);color:var(--ink);background:var(--panel-solid);
  border:2px solid var(--brand);border-radius:.35rem;padding:.2rem .35rem}
.vp-views{display:flex;flex-direction:column;gap:.25rem;padding:.5rem}
.vp-views .row{display:flex;gap:.25rem;flex-wrap:wrap}
.vp-hud{position:absolute;left:50%;translate:-50% 0;bottom:.6rem;z-index:5;max-width:min(30rem,80%);
  background:var(--panel);border:1px solid var(--line);border-radius:.5rem;padding:.35rem .55rem;
  font-size:.78rem;color:var(--ink-dim);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px)}
.vp-hud b{color:var(--ink)}
/* sketch layer (src/sketcher.js): drawn over the 3D view in screen pixels */
.vp-sketch{position:absolute;inset:0;width:100%;height:100%;overflow:visible;pointer-events:none}
.sk-fill{fill:var(--sketch);fill-opacity:.16;fill-rule:evenodd;stroke:none}
.sk-halo{fill:none;stroke:var(--vp-bg);stroke-width:6.5;stroke-opacity:.9;stroke-linejoin:round;stroke-linecap:round}
.sk-halo.thin{stroke-width:5;stroke-opacity:.75}
.sk-ent{fill:none;stroke:var(--sketch);stroke-width:2.6;stroke-linejoin:round;stroke-linecap:round}
.sk-ent.hover{stroke-width:4.2}
.sk-ent.sel,.sk-ent.draft{stroke:var(--sketch-sel);stroke-width:3}
.sk-rubber{fill:none;stroke:var(--sketch-sel);stroke-width:2.2;stroke-dasharray:8 5;stroke-linecap:round}
.sk-guide{fill:none;stroke:var(--sketch-sel);stroke-width:1.2;stroke-dasharray:2 5;stroke-opacity:.85}
.sk-pt{fill:var(--vp-bg);stroke:var(--sketch);stroke-width:2}
.sk-pt.draft{fill:var(--sketch-sel);stroke:var(--vp-bg);stroke-width:1.5}
.sk-open{fill:var(--bad);stroke:var(--vp-bg);stroke-width:1.5}
.sk-cross{fill:none;stroke:var(--ink);stroke-width:1;stroke-opacity:.65}
.sk-snap{fill:none;stroke:var(--sketch-sel);stroke-width:2}
.sk-snap.grid{fill:var(--sketch-sel);stroke:none}
.vp-dim.live{border-color:var(--sketch-sel);font-weight:600;z-index:2}
.vp-dim.live.typed{background:var(--brand);color:#1a1206;border-color:var(--brand)}
.sk-coords{font:500 11px var(--mono);color:var(--ink)}
.sk-coords:empty{display:none}

/* ── floating panels (src/panels.js) ── */
.fp-layer{grid-area:view;position:relative;z-index:10;pointer-events:none;min-width:0;min-height:0}
.fp-tabs{display:none}
.fp{position:absolute;pointer-events:auto;display:flex;flex-direction:column;min-height:0;
  background:var(--panel-solid);border:1px solid var(--line);border-radius:.6rem;
  box-shadow:0 6px 22px rgba(0,0,0,.28)}
.fp.dragging{box-shadow:0 10px 30px rgba(0,0,0,.4);border-color:var(--line-hot);user-select:none}
.fp-bar{display:flex;align-items:center;gap:.25rem;flex:none;cursor:grab;touch-action:none;user-select:none;
  padding:.2rem .25rem .2rem .6rem;border-bottom:1px solid var(--line);border-radius:.6rem .6rem 0 0;
  background:color-mix(in srgb,var(--ink) 4%,var(--panel-solid))}
.fp.dragging .fp-bar{cursor:grabbing}
.fp.collapsed .fp-bar{border-bottom-color:transparent;border-radius:.6rem}
.fp-bar:focus-visible{outline:2px solid var(--brand);outline-offset:-2px}
.fp-title{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
  font-size:.68rem;font-weight:700;letter-spacing:.09em;text-transform:uppercase;color:var(--ink-dim)}
.fp-btn{appearance:none;background:none;border:0;border-radius:.3rem;cursor:pointer;color:var(--ink-faint);
  width:1.5rem;height:1.5rem;font:600 .95rem/1 var(--font);display:grid;place-items:center}
.fp-btn:hover{color:var(--ink);background:var(--surf)}
.fp-body{flex:1;min-height:0;overflow:auto;overscroll-behavior:contain}
.fp.collapsed .fp-body,.fp.collapsed .fp-grip{display:none}
.fp-body .sec:last-child{border-bottom:0}
.fp-grip{position:absolute;touch-action:none}
.fp-grip.e{top:.6rem;bottom:.6rem;right:-4px;width:8px;cursor:ew-resize}
.fp-grip.w{top:.6rem;bottom:.6rem;left:-4px;width:8px;cursor:ew-resize}
.fp-grip.s{left:.6rem;right:.6rem;bottom:-4px;height:8px;cursor:ns-resize}
.fp-grip.se{right:-4px;bottom:-4px;width:14px;height:14px;cursor:nwse-resize}
.fp-grip.sw{left:-4px;bottom:-4px;width:14px;height:14px;cursor:nesw-resize}
.fp-check{display:flex;align-items:center;gap:.5rem}
.fp-check .grow{flex:1}

/* ── controls ── */
.btn{appearance:none;font:inherit;font-size:.8rem;cursor:pointer;
  display:inline-flex;align-items:center;justify-content:center;gap:.35rem;white-space:nowrap;
  color:var(--ink);background:var(--surf);border:1px solid var(--line);
  border-radius:.45rem;padding:.3rem .6rem;min-height:1.9rem}
.btn:hover{border-color:var(--line-hot)}
.btn[aria-pressed="true"],.btn.on{background:color-mix(in srgb,var(--brand) 22%,var(--surf));border-color:var(--brand);color:var(--ink)}
.btn:disabled{opacity:.45;cursor:default}
.btn.primary{background:var(--brand);color:#1a1206;border-color:transparent;font-weight:700}
:root[data-theme="light"] .btn.primary{color:#fff}
.btn.small{font-size:.72rem;padding:.15rem .45rem;min-height:1.5rem}
.btn.icon{padding:.3rem;width:1.9rem}
.btn svg{width:1rem;height:1rem;fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
.btn.danger:hover{border-color:var(--bad);color:var(--bad)}
.grid2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:.3rem}
.linkrow{display:flex;align-items:center;gap:.4rem;margin:.15rem 0;font-size:.82rem}
.linkrow .grow{flex:1;min-width:0;overflow-wrap:anywhere}
.grid3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:.3rem}

.seg{display:inline-flex;border:1px solid var(--line);border-radius:.45rem;overflow:hidden;background:var(--surf)}
.seg button{appearance:none;background:none;border:0;color:var(--ink-dim);
  font:inherit;font-size:.78rem;padding:.3rem .6rem;cursor:pointer;white-space:nowrap}
.seg button+button{border-left:1px solid var(--line)}
.seg button.on,.seg button[aria-pressed="true"]{background:var(--brand);color:#1a1206;font-weight:700}
:root[data-theme="light"] .seg button.on,:root[data-theme="light"] .seg button[aria-pressed="true"]{color:#fff}

.field{display:grid;grid-template-columns:5.2rem minmax(0,1fr);align-items:center;gap:.4rem;margin:.25rem 0}
.field>span{font-size:.76rem;color:var(--ink-dim);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.field input,.field select,.inp{min-width:0;width:100%;font:500 .85rem var(--mono);color:var(--ink);
  background:var(--bg);border:1px solid var(--line);border-radius:.35rem;padding:.25rem .4rem}
.field input[aria-invalid="true"]{border-color:var(--bad);color:var(--bad)}
.field .unit{font-size:.7rem;color:var(--ink-faint)}
.field.check{grid-template-columns:auto 1fr}
.field.check input{width:auto}
.xyz{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:.25rem;margin:.2rem 0}
.xyz label{position:relative;min-width:0}
.xyz input{min-width:0;width:100%;font:500 .85rem var(--mono);color:var(--ink);
  background:var(--bg);border:1px solid var(--line);border-radius:.35rem;padding:.25rem .3rem .25rem 1rem}
.xyz input[aria-invalid="true"]{border-color:var(--bad);color:var(--bad)}
.range{display:flex;align-items:center;gap:.4rem;min-width:0}
.range input{flex:1;min-width:0}
.range .unit{white-space:nowrap;min-width:3.2rem;text-align:right}
.sec h2:not(:first-child){margin-top:.7rem}
.xyz label::before{content:attr(data-a);position:absolute;left:.35rem;top:50%;translate:0 -50%;
  font:700 .65rem var(--mono);color:var(--ink-faint);pointer-events:none}
.xyz label[data-a="X"]::before{color:var(--axis-x)} .xyz label[data-a="Y"]::before{color:var(--axis-y)}
.xyz label[data-a="Z"]::before{color:var(--axis-z)}
input[type=range]{width:100%;accent-color:var(--brand)}
input[type=checkbox]{accent-color:var(--brand)}

/* feature tree */
.ftree{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:.15rem}
.ftree ul{list-style:none;margin:.1rem 0 0 .9rem;padding:0 0 0 .4rem;border-left:1px dashed var(--line)}
.fitem{display:flex;align-items:center;gap:.3rem;padding:.2rem .3rem;border-radius:.4rem;cursor:pointer;
  border:1px solid transparent;font-size:.82rem;user-select:none}
.fitem:hover{background:var(--surf)}
.fitem.sel{border-color:var(--brand);background:color-mix(in srgb,var(--brand) 12%,transparent)}
.fitem .ico{width:1.1rem;text-align:center;color:var(--ink-faint);font:700 .7rem var(--mono)}
.fitem .nm{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.fitem.consumed .nm{color:var(--ink-faint)}
.fitem.err .nm{color:var(--bad)}
.fitem .eye{appearance:none;background:none;border:0;color:var(--ink-faint);cursor:pointer;padding:0 .2rem;font-size:.8rem}
.fitem .eye:hover{color:var(--ink)}
.fitem.hid .nm{opacity:.5}
.empty{font-size:.78rem;color:var(--ink-faint);margin:.2rem 0}

/* menu, as in the siblings */
.hl-menu{position:relative}
.hl-menu-summary{display:flex;align-items:center;gap:.45rem;cursor:pointer;list-style:none;
  padding:.35rem .75rem;border:1px solid var(--line);border-radius:999px;background:var(--surf);
  color:var(--ink-dim);font-size:.8rem;user-select:none}
.hl-menu-summary::-webkit-details-marker{display:none}
.hl-menu-summary:hover{border-color:var(--line-hot);color:var(--ink)}
.hl-menu-bars{width:.85rem;height:.7rem;flex:none;
  border-top:2px solid currentColor;border-bottom:2px solid currentColor;position:relative}
.hl-menu-bars::after{content:"";position:absolute;left:0;right:0;top:calc(50% - 1px);border-top:2px solid currentColor}
.hl-menu-panel{position:absolute;right:0;top:calc(100% + .35rem);z-index:60;
  min-width:15rem;display:flex;flex-direction:column;padding:.3rem;
  border:1px solid var(--line);border-radius:.6rem;background:var(--panel-solid);box-shadow:var(--shadow)}
.hl-menu-head{margin:.45rem .55rem .2rem;font-size:.62rem;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-faint)}
.hl-menu-head:first-child{margin-top:.2rem}
.hl-menu-item{appearance:none;background:none;border:0;cursor:pointer;font:inherit;
  font-size:.85rem;color:var(--ink);text-align:left;text-decoration:none;padding:.45rem .55rem;border-radius:.4rem}
.hl-menu-item:hover{background:var(--line)}
.hl-menu-seg{margin:.15rem .55rem .3rem;align-self:flex-start}

/* dialogs */
dialog{color:var(--ink);background:var(--panel-solid);border:1px solid var(--line);border-radius:var(--r);
  box-shadow:var(--shadow);padding:1rem 1.1rem;max-width:min(36rem,92vw)}
dialog::backdrop{background:rgba(0,0,0,.45)}
dialog h2{margin:0 0 .6rem;font-size:1rem}
dialog .actions{display:flex;gap:.4rem;justify-content:flex-end;margin-top:.8rem;flex-wrap:wrap}
.keys{display:grid;grid-template-columns:auto 1fr;gap:.25rem .9rem;font-size:.82rem}
.keys dt{font:600 .75rem var(--mono);color:var(--brand);white-space:nowrap}
.keys dd{margin:0;color:var(--ink-dim)}
.plist{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:.3rem;max-height:50vh;overflow:auto}
.plist li{display:flex;gap:.4rem;align-items:center;padding:.3rem .4rem;border:1px solid var(--line);border-radius:.45rem}
.plist li .nm{flex:1;min-width:0}
.plist li small{color:var(--ink-faint);display:block}

.toast{position:fixed;left:50%;bottom:2.4rem;translate:-50% 0;z-index:90;
  background:var(--panel-solid);border:1px solid var(--line-hot);border-radius:.5rem;
  padding:.45rem .8rem;font-size:.82rem;box-shadow:var(--shadow);max-width:90vw}
.toast.bad{border-color:var(--bad)}

/* ── signed-in chip ── same markup and rules in every Happy Light app. ── */
.hl-me{display:inline-flex;align-items:center;gap:.4rem;flex:none;max-width:13rem;
  padding:.15rem .7rem .15rem .15rem;border-radius:999px;
  border:1px solid color-mix(in srgb,var(--ok) 40%,var(--line));
  background:color-mix(in srgb,var(--ok) 9%,var(--surf,transparent));
  color:var(--ink);font-size:.78rem;font-weight:600;line-height:1.2;
  text-decoration:none;white-space:nowrap}
.hl-me:hover{border-color:color-mix(in srgb,var(--ok) 65%,transparent);
  background:color-mix(in srgb,var(--ok) 16%,var(--surf,transparent))}
.hl-me-avatar{position:relative;display:grid;place-items:center;flex:none;
  width:1.45rem;height:1.45rem;border-radius:50%;
  background:color-mix(in srgb,var(--ink) 10%,transparent)}
.hl-me-ghost{width:.8rem;height:.8rem;fill:currentColor;animation:hl-me-bob 2.4s steps(4) infinite}
.hl-me-dot{position:absolute;right:-1px;bottom:-1px;width:.5rem;height:.5rem;
  border-radius:50%;background:var(--ok);box-shadow:0 0 0 2px var(--bg)}
.hl-me-dot::after{content:"";position:absolute;inset:0;border-radius:inherit;
  background:var(--ok);animation:hl-me-ping 2.4s cubic-bezier(.22,.61,.36,1) infinite}
.hl-me-name{min-width:0;overflow:hidden;text-overflow:ellipsis}
@keyframes hl-me-bob{0%,100%{transform:translateY(0)}50%{transform:translateY(-1px)}}
@keyframes hl-me-ping{0%{transform:scale(1);opacity:.6}70%,100%{transform:scale(2.4);opacity:0}}
@media (max-width:560px){.hl-me{padding:.15rem}.hl-me-name{display:none}}
@media (prefers-reduced-motion:reduce){.hl-me-ghost,.hl-me-dot::after{animation:none}}

/* Phones: viewing first. The panels become one bottom sheet with a tab
   strip; tap the open tab again to fold the sheet away. */
@media (max-width:760px){
  .app{grid-template-rows:auto minmax(0,1fr) auto auto;grid-template-areas:"top" "view" "sheet" "status"}
  .toolbar.desk,#panels-menu{display:none}
  .hl-menu-word{display:none}
  .fp-layer{grid-area:sheet;pointer-events:auto;display:flex;flex-direction:column;
    background:var(--panel-solid);border-top:1px solid var(--line)}
  .fp-tabs{display:flex;flex:none;overflow-x:auto;border-bottom:1px solid var(--line)}
  .fp-layer.folded .fp-tabs{border-bottom:0}
  .fp-tab{appearance:none;background:none;border:0;border-bottom:2px solid transparent;cursor:pointer;
    color:var(--ink-dim);font:600 .78rem var(--font);padding:.5rem .8rem;white-space:nowrap}
  .fp-tab[aria-selected="true"]{color:var(--ink);border-bottom-color:var(--brand)}
  .fp,.fp[hidden]{position:static;display:none !important;border:0;border-radius:0;box-shadow:none;max-height:38dvh}
  .fp.tab-on{display:flex !important}
  .fp-bar,.fp-grip{display:none}
  .fp.collapsed .fp-body{display:block}
}

/* ── Build with AI (src/ai-panel.js) and the review in Properties ── */
.ai-panel .actions{display:flex;flex-wrap:wrap;gap:.3rem;margin-top:.4rem}
.ai-label{display:block;font-size:.76rem;color:var(--ink-dim);margin:.4rem 0 .2rem}
.ai-panel textarea.inp{display:block;resize:vertical;font:400 .8rem/1.4 var(--font);padding:.35rem .45rem;
  background:var(--surf);border:1px solid var(--line);border-radius:.4rem}
.ai-panel textarea.ai-prompt{margin-top:.5rem;font-family:var(--mono);font-size:.72rem;color:var(--ink-dim)}
.ai-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:.35rem}
.ai-list li{padding:.35rem .45rem;border:1px solid var(--line);border-radius:.45rem}
.ai-list li.empty{border-style:dashed}
.ai-list small{color:var(--ink-faint)}
.ai-msg{font-size:.8rem;overflow-wrap:anywhere}
.hint.bad{color:var(--bad)}
.ai-diff{list-style:none;margin:.4rem 0;padding:0;font-size:.78rem;max-height:14rem;overflow:auto}
.ai-diff li{display:flex;gap:.4rem;padding:.1rem 0;overflow-wrap:anywhere}
.ai-diff .k{flex:none;width:4.2rem;font-size:.66rem;letter-spacing:.06em;text-transform:uppercase;color:var(--ink-faint)}
.ai-diff .added .k{color:var(--ok)} .ai-diff .removed .k{color:var(--bad)} .ai-diff .changed .k{color:var(--warn)}
.ai-btn .badge{min-width:1.1rem;padding:0 .3rem;border-radius:1rem;background:var(--brand);color:#1a1206;font-size:.66rem;font-weight:700;line-height:1.1rem}

/* ── Print panel (src/print-panel.js) ─────────────────────────────── */
.print-panel .actions{display:flex;flex-wrap:wrap;gap:.3rem;margin-top:.2rem}
.print-panel .with-unit{display:flex;align-items:center;gap:.3rem;min-width:0}
.print-panel .with-unit input{flex:1}
.print-panel .pp-adv{margin-top:.5rem}
.print-panel .pp-adv summary{cursor:pointer;font-size:.76rem;color:var(--ink-dim)}
.print-panel .pp-adv h2{margin:.6rem 0 .3rem;font-size:.62rem;letter-spacing:.09em;text-transform:uppercase;color:var(--ink-faint)}
.print-panel .pp-progress{display:block;width:100%;margin:.5rem 0 0;accent-color:var(--brand)}
.print-panel .pp-big{margin:.5rem 0 0;font:700 .9rem var(--mono);color:var(--ink)}
.print-panel .pp-notes{margin:.3rem 0 0;padding-left:1rem;font-size:.74rem;color:var(--warn)}
.print-panel .pp-layer{display:flex;align-items:center;gap:.5rem}
.print-panel .pp-layer input{flex:1;min-width:0;accent-color:var(--brand)}
.print-panel .pp-layer output{font:500 .74rem var(--mono);color:var(--ink-dim);white-space:nowrap}
.print-panel .pp-legend{list-style:none;margin:.4rem 0;padding:0;display:grid;grid-template-columns:1fr 1fr;gap:.15rem .5rem;font-size:.74rem;color:var(--ink-dim)}
.print-panel .pp-legend i{display:inline-block;width:.7rem;height:.7rem;border-radius:.15rem;margin-right:.35rem;vertical-align:-.05rem;background:var(--c)}
.print-panel textarea.pp-gcode{display:block;width:100%;resize:vertical;font:400 .72rem/1.35 var(--mono);padding:.3rem .4rem}