/* Bricks Cubed — Steel City LUG designer theme (D-027).
   A crisp, professional workspace: near-white panels on a light-grey canvas,
   one brick-yellow accent, a brick-red for warnings, tight 4/8/12/16/24
   spacing. Every rule is scoped under .bc3-app so it holds up against
   arbitrary theme CSS. */

.bc3-app{
  --bc3-ink:#1a1a1a;
  --bc3-ink-muted:#55585c;
  --bc3-ink-faint:#7a7d82;
  --bc3-canvas:#eef0f2;
  --bc3-panel:#ffffff;
  --bc3-panel-alt:#f7f8f9;
  --bc3-border:#dcdfe3;
  --bc3-border-strong:#c3c7cd;
  --bc3-accent:#f2c200;
  --bc3-accent-ink:#1a1a1a;
  --bc3-accent-strong:#d9ac00;
  --bc3-danger:#c62828;
  --bc3-danger-bg:#fdecec;
  --bc3-warning:#d98200;
  --bc3-warning-bg:#fff6e5;
  --bc3-good:#1e7a37;
  --bc3-good-bg:#eaf7ee;
  --bc3-focus:#1454b8;
  --bc3-radius:8px;
  --bc3-radius-lg:10px;
  --bc3-shadow:0 1px 2px rgba(20,20,20,.06),0 4px 10px rgba(20,20,20,.05);
  --bc3-space-1:4px;
  --bc3-space-2:8px;
  --bc3-space-3:12px;
  --bc3-space-4:16px;
  --bc3-space-6:24px;
  font-family:system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  color:var(--bc3-ink);
  background:var(--bc3-canvas);
  max-width:1280px;margin:0 auto;padding:var(--bc3-space-4);
  border-radius:var(--bc3-radius-lg);
  box-sizing:border-box;
}
@media (prefers-color-scheme:dark){
  .bc3-app:not([data-theme="light"]){
    --bc3-ink:#f1f1f1;--bc3-ink-muted:#c7c9cc;--bc3-ink-faint:#9a9da2;
    --bc3-canvas:#15161a;--bc3-panel:#1e2025;--bc3-panel-alt:#24262c;
    --bc3-border:#33363d;--bc3-border-strong:#454851;
    --bc3-accent:#f2c200;--bc3-accent-ink:#1a1a1a;--bc3-accent-strong:#ffd633;
    --bc3-danger:#ff6b6b;--bc3-danger-bg:#3a1a1a;
    --bc3-warning:#e0a339;--bc3-warning-bg:#3a2f10;
    --bc3-good:#5fd383;--bc3-good-bg:#123a20;
    --bc3-focus:#6fa8ff;
    --bc3-shadow:0 1px 2px rgba(0,0,0,.4),0 4px 12px rgba(0,0,0,.35);
  }
}
.bc3-app[data-theme="dark"]{
  --bc3-ink:#f1f1f1;--bc3-ink-muted:#c7c9cc;--bc3-ink-faint:#9a9da2;
  --bc3-canvas:#15161a;--bc3-panel:#1e2025;--bc3-panel-alt:#24262c;
  --bc3-border:#33363d;--bc3-border-strong:#454851;
  --bc3-accent:#f2c200;--bc3-accent-ink:#1a1a1a;--bc3-accent-strong:#ffd633;
  --bc3-danger:#ff6b6b;--bc3-danger-bg:#3a1a1a;
  --bc3-warning:#e0a339;--bc3-warning-bg:#3a2f10;
  --bc3-good:#5fd383;--bc3-good-bg:#123a20;
  --bc3-focus:#6fa8ff;
  --bc3-shadow:0 1px 2px rgba(0,0,0,.4),0 4px 12px rgba(0,0,0,.35);
}

.bc3-app [hidden]{display:none!important}
.bc3-app *{box-sizing:border-box}
.bc3-app :is(button,input,select,textarea){font-family:inherit;color:inherit}
.bc3-app button{background:none}
.bc3-app h1,.bc3-app h2,.bc3-app h3,.bc3-app h4{font-family:inherit;line-height:1.2}
.bc3-app p{line-height:1.45}

/* ---------- Header / brand / About ---------- */
.bc3-header{display:flex;align-items:flex-start;justify-content:space-between;gap:var(--bc3-space-3);margin:0 0 var(--bc3-space-3)}
.bc3-brand{display:flex;align-items:center;gap:var(--bc3-space-2)}
.bc3-brand-mark{width:22px;height:22px;flex:0 0 22px;border-radius:5px;background:var(--bc3-accent);position:relative;box-shadow:inset 0 -2px 0 rgba(0,0,0,.15)}
.bc3-brand-mark::before,.bc3-brand-mark::after{content:"";position:absolute;top:4px;width:6px;height:6px;border-radius:50%;background:var(--bc3-panel);box-shadow:0 0 0 1px rgba(0,0,0,.08)}
.bc3-brand-mark::before{left:4px}
.bc3-brand-mark::after{left:12px}
.bc3-brand h2{margin:0;font-size:1.3rem;font-weight:800;letter-spacing:-.01em}
.bc3-brand h2 sup{font-size:.65em}
.bc3-brand-sub{font-weight:500;color:var(--bc3-ink-muted);font-size:.85em;margin-left:var(--bc3-space-1)}
.bc3-about{position:relative}
.bc3-about summary{list-style:none;cursor:pointer;font-weight:600;font-size:.9rem;padding:var(--bc3-space-1) var(--bc3-space-3);border:1px solid var(--bc3-border-strong);border-radius:var(--bc3-radius);background:var(--bc3-panel);min-height:36px;display:inline-flex;align-items:center}
.bc3-about summary::-webkit-details-marker{display:none}
.bc3-about summary:hover{background:var(--bc3-panel-alt)}
.bc3-about[open] summary{border-color:var(--bc3-focus)}
.bc3-about-content{position:absolute;right:0;z-index:20;margin-top:var(--bc3-space-2);width:min(360px,90vw);padding:var(--bc3-space-4);background:var(--bc3-panel);border:1px solid var(--bc3-border);border-radius:var(--bc3-radius-lg);box-shadow:var(--bc3-shadow);font-size:.86rem;color:var(--bc3-ink-muted)}
.bc3-about-content p{margin:0 0 var(--bc3-space-2)}
.bc3-about-content .bc3-software-ref{display:block;margin:var(--bc3-space-2) 0;font-size:.8rem;color:var(--bc3-ink-faint);overflow-wrap:anywhere}
.bc3-trademark{margin-top:var(--bc3-space-3);padding-top:var(--bc3-space-2);border-top:1px solid var(--bc3-border);font-size:.76rem;color:var(--bc3-ink-faint)}

/* ---------- How it works ---------- */
.bc3-howto{margin:0 0 var(--bc3-space-3);border:1px solid var(--bc3-border);border-radius:var(--bc3-radius);background:var(--bc3-panel)}
.bc3-howto summary{cursor:pointer;list-style:none;font-weight:700;font-size:.92rem;padding:var(--bc3-space-2) var(--bc3-space-3);min-height:36px;display:flex;align-items:center;gap:var(--bc3-space-1)}
.bc3-howto summary::-webkit-details-marker{display:none}
.bc3-howto summary::before{content:"▸";color:var(--bc3-ink-faint);font-size:.75em}
.bc3-howto[open] summary::before{content:"▾"}
.bc3-howto-steps{margin:0;padding:0 var(--bc3-space-3) var(--bc3-space-3) calc(var(--bc3-space-3) + 1.1rem);font-size:.88rem;color:var(--bc3-ink-muted);display:grid;gap:var(--bc3-space-1)}

/* ---------- Toolbar / setup cards ---------- */
.bc3-toolbar{display:block;margin:0 0 var(--bc3-space-4)}
.bc3-setup{display:block}
.bc3-setup>h3{position:absolute;left:-9999px}
.bc3-card{display:grid;gap:var(--bc3-space-2);margin:0 0 var(--bc3-space-3);padding:var(--bc3-space-4);border:1px solid var(--bc3-border);border-radius:var(--bc3-radius-lg);background:var(--bc3-panel);box-shadow:var(--bc3-shadow)}
.bc3-card>legend{padding:0;font-weight:700;font-size:.82rem;letter-spacing:.02em;text-transform:uppercase;color:var(--bc3-ink-muted);margin:0 0 var(--bc3-space-1)}
.bc3-toolbar label,.bc3-base-panel label{display:flex;flex-direction:column;gap:var(--bc3-space-1);font-size:.88rem;font-weight:600}
.bc3-toolbar label:has(input[type="checkbox"]),.bc3-base-panel label:has(input[type="checkbox"]){flex-direction:row;align-items:center;font-weight:500}
.bc3-toolbar select,.bc3-toolbar input[type="text"],.bc3-toolbar input[type="number"],.bc3-base-panel select{height:36px;padding:0 var(--bc3-space-2);border:1px solid var(--bc3-border-strong);border-radius:var(--bc3-radius);background:var(--bc3-panel);color:var(--bc3-ink);font:inherit;font-size:.88rem}
.bc3-toolbar select:focus-visible,.bc3-toolbar input:focus-visible{outline:2px solid var(--bc3-focus);outline-offset:1px}
.bc3-toolbar input[type="checkbox"],.bc3-base-panel input[type="checkbox"]{width:18px;height:18px;margin:0;accent-color:var(--bc3-accent-strong)}
.bc3-toolbar input[type="range"],.bc3-base-panel input[type="range"]{width:100%;accent-color:var(--bc3-accent-strong)}
.bc3-hint{margin:0;font-size:.78rem;line-height:1.4;color:var(--bc3-ink-faint);font-weight:400}
.bc3-hint[hidden]{display:none}
.bc3-custom-dims{margin:var(--bc3-space-1) 0 0;padding:var(--bc3-space-3);border:1px dashed var(--bc3-border-strong);border-radius:var(--bc3-radius);display:grid;gap:var(--bc3-space-2)}
.bc3-custom-dims[hidden]{display:none}
.bc3-custom-dims>legend{font-size:.78rem;color:var(--bc3-ink-faint);font-weight:600;padding:0}
.bc3-size-physical{margin:0;font-size:.82rem;color:var(--bc3-ink-muted);font-weight:600}
.bc3-button-row{display:flex;gap:var(--bc3-space-2);flex-wrap:wrap}
.bc3-toolbar button{font:inherit;font-size:.86rem;font-weight:600;min-height:36px;padding:0 var(--bc3-space-3);border:1px solid var(--bc3-border-strong);border-radius:var(--bc3-radius);background:var(--bc3-panel);color:var(--bc3-ink);cursor:pointer}
.bc3-toolbar button:hover{background:var(--bc3-panel-alt)}
.bc3-toolbar button.bc3-btn-primary,.bc3-app .bc3-btn-primary{background:var(--bc3-accent);border-color:var(--bc3-accent-strong);color:var(--bc3-accent-ink)}
.bc3-toolbar button.bc3-btn-primary:hover{background:var(--bc3-accent-strong)}
.bc3-toolbar button.bc3-btn-secondary,.bc3-app .bc3-btn-secondary,
.bc3-toolbar button.bc3-save-as-new,.bc3-toolbar button.bc3-copy-link{background:var(--bc3-panel);color:var(--bc3-ink)}
.bc3-save-note{font-size:.84rem;color:var(--bc3-ink-faint)}
.bc3-save-status,.bc3-load-status,.bc3-validation-status,.bc3-share-link{display:block;font-size:.82rem;color:var(--bc3-ink-muted);min-height:1.3em}
.bc3-share-link{overflow-wrap:anywhere}
.bc3-initial-status{position:absolute;left:-9999px}

/* Allowed parts / validation details */
.bc3-palette,.bc3-validation-presets{border:1px solid var(--bc3-border);border-radius:var(--bc3-radius);padding:0;background:var(--bc3-panel-alt)}
.bc3-palette summary,.bc3-validation-presets summary{cursor:pointer;list-style:none;font-weight:600;font-size:.86rem;padding:var(--bc3-space-2) var(--bc3-space-3);min-height:36px;display:flex;align-items:center;justify-content:space-between;gap:var(--bc3-space-2)}
.bc3-palette summary::-webkit-details-marker,.bc3-validation-presets summary::-webkit-details-marker{display:none}
.bc3-palette-count{font-weight:400;color:var(--bc3-ink-faint);font-size:.82rem}
.bc3-palette-groups{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:var(--bc3-space-2);padding:0 var(--bc3-space-3) var(--bc3-space-2)}
.bc3-palette-group{border:1px solid var(--bc3-border);border-radius:var(--bc3-radius);padding:var(--bc3-space-2);margin:0;background:var(--bc3-panel)}
.bc3-palette-group legend{font-size:.76rem;font-weight:700;color:var(--bc3-ink-muted);padding:0}
.bc3-palette-group label{display:flex;align-items:center;gap:var(--bc3-space-1);font-size:.82rem;font-weight:500;padding:2px 0}
.bc3-palette-note,.bc3-palette-status{margin:0;padding:0 var(--bc3-space-3) var(--bc3-space-2);font-size:.78rem;color:var(--bc3-ink-faint)}
.bc3-validation-presets{margin-top:var(--bc3-space-2)}
.bc3-validation-presets>*:not(summary){padding:0 var(--bc3-space-3)}
.bc3-validation-presets>p{padding-bottom:var(--bc3-space-2);font-size:.78rem;color:var(--bc3-ink-faint)}
.bc3-validation-presets label{display:flex;flex-direction:column;gap:var(--bc3-space-1);font-size:.84rem;font-weight:600;margin:var(--bc3-space-2) 0}
.bc3-validation-presets .bc3-load-validation{margin:0 0 var(--bc3-space-2)}

/* ---------- Face editors ---------- */
.bc3-sources{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:var(--bc3-space-4);margin:0 0 var(--bc3-space-4)}
/* Two views: two editors and the Base card (D-044). */
.bc3-base-heading{margin:0 0 var(--bc3-space-2);font-size:1rem}
.bc3-base-panel label{margin:var(--bc3-space-2) 0}
.bc3-palette-main{margin-top:var(--bc3-space-3)}
.bc3-viewer-stage{position:relative}
.bc3-magic-inset-frame{position:absolute;box-sizing:border-box;border:2px solid var(--bc3-ink,#1a1a1a);border-radius:6px;pointer-events:none}
.bc3-magic-inset-frame span{position:absolute;left:6px;top:4px;font-size:.72rem;font-weight:700;color:var(--bc3-ink,#1a1a1a);background:rgba(255,255,255,.8);padding:1px 5px;border-radius:4px}
.bc3-controls-hint{margin:var(--bc3-space-2) 0 0;font-size:.82rem;color:var(--bc3-ink-muted,#555)}
.bc3-base-card{display:grid;gap:var(--bc3-space-2);padding:var(--bc3-space-2) 0 0}
.bc3-source-panel,.bc3-viewer-panel{border:1px solid var(--bc3-border);border-radius:var(--bc3-radius-lg);padding:var(--bc3-space-4);background:var(--bc3-panel);box-shadow:var(--bc3-shadow)}
.bc3-source-header,.bc3-viewer-header{display:flex;align-items:center;justify-content:space-between;gap:var(--bc3-space-2)}
.bc3-source-header h3,.bc3-viewer-header h3{margin:0 0 var(--bc3-space-2);font-size:1rem;font-weight:700}
.bc3-conflict-count,.bc3-viewer-stats{font-size:.78rem;color:var(--bc3-ink-muted)}
.bc3-tabs{display:flex;gap:2px;flex-wrap:wrap;margin-bottom:var(--bc3-space-2);padding:2px;border:1px solid var(--bc3-border);border-radius:var(--bc3-radius);background:var(--bc3-panel-alt);width:fit-content;max-width:100%}
.bc3-tabs button{flex:1 1 auto;font:inherit;font-size:.82rem;font-weight:600;padding:6px var(--bc3-space-2);border:0;border-radius:6px;background:transparent;color:var(--bc3-ink-muted);cursor:pointer}
.bc3-tabs button.is-active{background:var(--bc3-panel);color:var(--bc3-ink);box-shadow:0 1px 2px rgba(0,0,0,.08)}
.bc3-mode{display:flex;flex-wrap:wrap;gap:var(--bc3-space-2) var(--bc3-space-3);align-items:center;min-height:4.8rem;margin-bottom:var(--bc3-space-2);padding:var(--bc3-space-2) var(--bc3-space-3);border:1px solid var(--bc3-border);border-radius:var(--bc3-radius);background:var(--bc3-panel-alt)}
.bc3-mode[hidden],.bc3-view-presets[hidden],.bc3-build-caption[hidden]{display:none}
.bc3-mode label{font-size:.8rem;font-weight:600;display:flex;align-items:center;gap:var(--bc3-space-1)}
.bc3-mode input[type="text"],.bc3-mode select,.bc3-mode input[type="file"]{max-width:9rem;height:32px;padding:0 6px;border:1px solid var(--bc3-border-strong);border-radius:6px;background:var(--bc3-panel);font:inherit;font-size:.8rem}
.bc3-mode input[type="range"]{width:6rem;accent-color:var(--bc3-accent-strong)}
.bc3-mode input[type="checkbox"]{width:16px;height:16px;accent-color:var(--bc3-accent-strong)}
.bc3-mode-draw [role="group"]{display:flex;gap:2px;padding:2px;border:1px solid var(--bc3-border);border-radius:var(--bc3-radius);background:var(--bc3-panel)}
.bc3-mode-draw [data-tool]{font:inherit;font-size:.78rem;font-weight:600;padding:5px 8px;border:0;border-radius:6px;background:transparent;color:var(--bc3-ink-muted);cursor:pointer}
.bc3-mode-draw [data-tool].is-active{background:var(--bc3-accent);color:var(--bc3-accent-ink)}
.bc3-mode-draw [data-action]{font:inherit;font-size:.78rem;font-weight:600;padding:5px 10px;border:1px solid var(--bc3-border-strong);border-radius:6px;background:var(--bc3-panel);cursor:pointer}
.bc3-autocrop{font:inherit;font-size:.78rem;font-weight:600;padding:5px 10px;border:1px solid var(--bc3-border-strong);border-radius:6px;background:var(--bc3-panel);cursor:pointer}
.bc3-grid{display:block;max-width:100%;aspect-ratio:1/1;height:auto;border:1px solid var(--bc3-border-strong);border-radius:6px;touch-action:none;image-rendering:pixelated;background:#fff}
.bc3-split-warning{box-sizing:border-box;min-height:4.6em;margin:var(--bc3-space-2) 0 0;padding:var(--bc3-space-2) var(--bc3-space-3);border-left:3px solid transparent;border-radius:6px;background:transparent;color:var(--bc3-ink-muted);font-size:.82rem;line-height:1.4}
.bc3-split-warning.is-active{border-left-color:var(--bc3-warning);background:var(--bc3-warning-bg);color:#4a3608}
@media (prefers-color-scheme:dark){.bc3-app:not([data-theme="light"]) .bc3-split-warning.is-active{color:var(--bc3-ink)}}
.bc3-app[data-theme="dark"] .bc3-split-warning.is-active{color:var(--bc3-ink)}

/* ---------- Status bar / preview ---------- */
.bc3-status-bar{display:flex;align-items:center;gap:var(--bc3-space-3);flex-wrap:wrap;margin:0 0 var(--bc3-space-3);padding:var(--bc3-space-2) var(--bc3-space-3);border:1px solid var(--bc3-border);border-radius:var(--bc3-radius);background:var(--bc3-panel);box-shadow:var(--bc3-shadow)}
.bc3-analysis-status{margin:0;flex:1 1 12rem;min-width:0;font-weight:600;font-size:.88rem}
.bc3-status-bar .bc3-regenerate{font:inherit;font-size:.84rem;font-weight:700;min-height:36px;padding:0 var(--bc3-space-3);border:1px solid var(--bc3-accent-strong);border-radius:var(--bc3-radius);background:var(--bc3-accent);color:var(--bc3-accent-ink);cursor:pointer}
.bc3-status-bar .bc3-regenerate:hover{background:var(--bc3-accent-strong)}
.bc3-status-bar .bc3-regenerate:disabled{opacity:.4;cursor:default;background:var(--bc3-panel-alt);border-color:var(--bc3-border-strong);color:var(--bc3-ink-muted)}
.bc3-status-bar .bc3-regenerate.is-dirty{box-shadow:0 0 0 3px color-mix(in srgb,var(--bc3-accent) 45%,transparent);animation:bc3-dirty 1.8s ease-in-out infinite}
@keyframes bc3-dirty{50%{box-shadow:0 0 0 6px color-mix(in srgb,var(--bc3-accent) 15%,transparent)}}
@media (prefers-reduced-motion:reduce){.bc3-status-bar .bc3-regenerate.is-dirty{animation:none}}
.bc3-sources>bc3-source{display:flex}
.bc3-sources>bc3-source>.bc3-source-panel{flex:1;min-width:0}

.bc3-build-summary{margin:0 0 var(--bc3-space-3)}
.bc3-build-summary[hidden]{display:none}
.bc3-build-stats{font-size:.92rem;font-weight:700;margin:0 0 var(--bc3-space-2)}
.bc3-build-diagnostics{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:var(--bc3-space-2);list-style:none;margin:0;padding:0}
.bc3-build-diagnostic{display:grid;gap:2px;padding:var(--bc3-space-2) var(--bc3-space-3);border:1px solid var(--bc3-border);border-left:4px solid var(--bc3-border-strong);border-radius:6px;background:var(--bc3-panel-alt);font-size:.84rem;line-height:1.35}
.bc3-build-diagnostic span{color:var(--bc3-ink-muted)}
.bc3-build-diagnostic.is-disconnected{border-left-color:var(--bc3-focus)}
.bc3-build-diagnostic.is-weak{border-left-color:var(--bc3-warning);background:var(--bc3-warning-bg)}
.bc3-build-diagnostic.is-overhang,.bc3-build-diagnostic.is-failure{border-left-color:var(--bc3-danger);background:var(--bc3-danger-bg)}
.bc3-build-diagnostic.is-clear{border-left-color:var(--bc3-good);background:var(--bc3-good-bg)}
.bc3-component-inspector{margin-top:var(--bc3-space-3);padding-top:var(--bc3-space-3);border-top:1px solid var(--bc3-border)}
.bc3-component-inspector[hidden]{display:none}
.bc3-component-controls{display:flex;gap:var(--bc3-space-1);flex-wrap:wrap}
.bc3-component-controls button{display:inline-flex;align-items:center;gap:var(--bc3-space-1);min-height:36px;padding:6px 10px;border:1px solid var(--bc3-border-strong);border-radius:6px;background:var(--bc3-panel);color:var(--bc3-ink);font:inherit;font-size:.8rem;font-weight:600;cursor:pointer}
.bc3-component-controls button.is-active{border-color:var(--bc3-focus);box-shadow:inset 0 0 0 1px var(--bc3-focus);background:var(--bc3-panel-alt)}
.bc3-component-swatch{width:.75rem;height:.75rem;flex:0 0 .75rem;border:1px solid rgba(0,0,0,.25);border-radius:50%;background:var(--bc3-component-color)}
.bc3-component-detail{margin:var(--bc3-space-2) 0 0;font-size:.82rem;line-height:1.4;color:var(--bc3-ink-muted)}

.bc3-validation-aid,.bc3-reconstruction-aid{margin-top:var(--bc3-space-3);border-top:1px solid var(--bc3-border);padding-top:var(--bc3-space-2);font-size:.84rem}
.bc3-validation-aid summary,.bc3-reconstruction-aid summary{display:flex;align-items:center;justify-content:space-between;gap:var(--bc3-space-2);min-height:36px;font-weight:700;cursor:pointer;list-style:none}
.bc3-validation-aid summary::-webkit-details-marker,.bc3-reconstruction-aid summary::-webkit-details-marker{display:none}
.bc3-validation-layout,.bc3-reconstruction-count{font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:.76rem;font-weight:600;color:var(--bc3-ink-faint)}
.bc3-validation-content,.bc3-reconstruction-content{padding:var(--bc3-space-1) 0 0}
.bc3-validation-content>p:first-child,.bc3-reconstruction-content>p:first-child{margin:var(--bc3-space-1) 0 var(--bc3-space-2);color:var(--bc3-ink-muted)}
.bc3-validation-actions,.bc3-layer-controls,.bc3-reconstruction-actions{display:flex;align-items:center;gap:var(--bc3-space-2);flex-wrap:wrap}
.bc3-validation-actions button,.bc3-layer-controls button,.bc3-layer-controls select,.bc3-reconstruction-actions button{min-height:36px;padding:6px 10px;border:1px solid var(--bc3-border-strong);border-radius:6px;background:var(--bc3-panel);font:inherit;font-size:.82rem;font-weight:600;cursor:pointer}
.bc3-validation-copy-status,.bc3-reconstruction-status{font-size:.8rem;color:var(--bc3-ink-muted)}
.bc3-validation-summary{max-height:12rem;overflow:auto;margin:var(--bc3-space-2) 0;padding:var(--bc3-space-2);border:1px solid var(--bc3-border);border-radius:6px;background:var(--bc3-panel-alt);white-space:pre-wrap;overflow-wrap:anywhere;font-size:.74rem;line-height:1.35}
.bc3-validation-content ol{margin:var(--bc3-space-2) 0;padding-left:1.35rem}
.bc3-validation-content li+li{margin-top:var(--bc3-space-1)}
.bc3-validation-gate{margin:var(--bc3-space-2) 0 0;padding:var(--bc3-space-2) var(--bc3-space-3);border-left:3px solid var(--bc3-warning);background:var(--bc3-warning-bg);color:#3f350f}
.bc3-app[data-theme="dark"] .bc3-validation-gate{color:var(--bc3-ink)}

.bc3-coordinate-help,.bc3-placement-detail{margin:var(--bc3-space-2) 0;color:var(--bc3-ink-muted);line-height:1.4;font-size:.82rem}
.bc3-reconstruction-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.4fr);gap:var(--bc3-space-3)}
.bc3-reconstruction-grid h4{margin:var(--bc3-space-2) 0;font-size:.86rem}
.bc3-inventory,.bc3-placement-list{max-height:15rem;overflow:auto;border:1px solid var(--bc3-border);border-radius:6px}
.bc3-inventory table{width:100%;border-collapse:collapse;font-size:.78rem}
.bc3-inventory th,.bc3-inventory td{padding:6px;text-align:left;border-bottom:1px solid var(--bc3-border)}
.bc3-placement-list{display:grid;padding:4px;gap:4px}
.bc3-placement-list button{padding:6px;text-align:left;border:1px solid var(--bc3-border-strong);border-radius:5px;background:var(--bc3-panel);font:inherit;font-family:ui-monospace,SFMono-Regular,Consolas,monospace;font-size:.74rem;cursor:pointer}
.bc3-placement-list button.is-active{border-color:var(--bc3-focus);box-shadow:inset 0 0 0 1px var(--bc3-focus);background:var(--bc3-panel-alt)}

.bc3-viewer-controls{display:flex;gap:2px;flex-wrap:wrap;margin-bottom:var(--bc3-space-3);padding:2px;border:1px solid var(--bc3-border);border-radius:var(--bc3-radius);background:var(--bc3-panel-alt);width:fit-content;max-width:100%}
.bc3-viewer-controls button[data-mode]{font:inherit;font-size:.84rem;font-weight:600;padding:6px 12px;border:0;border-radius:6px;background:transparent;color:var(--bc3-ink-muted);cursor:pointer}
.bc3-viewer-controls button[data-mode].is-active{background:var(--bc3-panel);color:var(--bc3-ink);box-shadow:0 1px 2px rgba(0,0,0,.08)}
.bc3-view-presets{display:flex;gap:2px}
.bc3-view-presets button{font:inherit;font-size:.8rem;font-weight:600;padding:5px 9px;border:1px solid var(--bc3-border-strong);border-radius:6px;background:var(--bc3-panel);cursor:pointer}
.bc3-view-presets button[aria-pressed="true"]{background:var(--bc3-accent);color:var(--bc3-accent-ink);border-color:var(--bc3-accent-strong)}
.bc3-viewer-controls [data-action]{font:inherit;font-size:.8rem;font-weight:600;padding:6px 10px;margin-left:auto;border:1px solid var(--bc3-border-strong);border-radius:6px;background:var(--bc3-panel);cursor:pointer}
.bc3-viewer-panel{margin-top:var(--bc3-space-3)}
.bc3-viewer-stage{width:100%;min-height:320px;background:var(--bc3-canvas);border:1px solid var(--bc3-border);border-radius:var(--bc3-radius);overflow:hidden}
/* The canvas keeps its 1 : 0.65 shape and never grows taller than the screen (D-044). */
.bc3-viewer-stage canvas{display:block;width:min(100%,calc(78vh / 0.65));height:auto;margin:0 auto;touch-action:none}
.bc3-viewer-caption,.bc3-build-caption{margin:var(--bc3-space-3) 0 0;font-size:.84rem;color:var(--bc3-ink-muted)}
.bc3-build-caption{font-weight:600}
.bc3-notice{padding:var(--bc3-space-4);border:1px solid var(--bc3-border);border-radius:var(--bc3-radius-lg);background:var(--bc3-panel)}
.bc3-conflict-count:not(:empty){color:var(--bc3-ink-muted)}

.bc3-support-overlay{margin:0 0 var(--bc3-space-3);padding:var(--bc3-space-2) var(--bc3-space-3);border:1px solid var(--bc3-border);border-radius:var(--bc3-radius);background:var(--bc3-panel-alt)}
.bc3-support-overlay[hidden]{display:none}
.bc3-support-overlay label{display:flex;align-items:center;gap:var(--bc3-space-1);font-size:.86rem;font-weight:600}
.bc3-support-note,.bc3-support-legend{margin:var(--bc3-space-1) 0 0;font-size:.8rem;color:var(--bc3-ink-muted)}

@media(max-width:900px){
  .bc3-build-diagnostics{grid-template-columns:1fr}
  .bc3-component-controls{display:grid;grid-template-columns:repeat(2,minmax(0,1fr))}
  .bc3-component-controls button{justify-content:flex-start;text-align:left}
  .bc3-sources,.bc3-sources.is-two-view{grid-template-columns:1fr}
  .bc3-source-panel{max-width:520px;margin:0 auto;width:100%}
  .bc3-header{align-items:flex-start;flex-direction:column}
  .bc3-status-bar{align-items:center}
  .bc3-status-bar .bc3-regenerate{flex:1 1 100%}
  .bc3-reconstruction-grid{grid-template-columns:1fr}
}
@media(max-width:520px){
  .bc3-component-controls{grid-template-columns:1fr}
  .bc3-validation-aid summary,.bc3-reconstruction-aid summary{align-items:flex-start;flex-direction:column;gap:2px}
  .bc3-validation-actions,.bc3-layer-controls,.bc3-reconstruction-actions{align-items:stretch;flex-direction:column}
  .bc3-validation-actions button,.bc3-layer-controls button,.bc3-layer-controls label,.bc3-layer-controls select,.bc3-reconstruction-actions button{width:100%}
  .bc3-about-content{position:fixed;left:16px;right:16px;top:64px;width:auto}
}

.bc3-app :is(button,input,select,summary,[tabindex]):focus-visible{outline:3px solid var(--bc3-focus);outline-offset:3px;box-shadow:0 0 0 2px var(--bc3-panel)}
.bc3-app button,.bc3-app summary,.bc3-app select,.bc3-app input:not([type="range"]){min-height:44px}
.bc3-cell-status,.bc3-image-status{display:block;min-height:1.4em;font-size:.86rem;color:var(--bc3-ink-muted)}
.bc3-resize-note{margin:var(--bc3-space-1) 0 0;font-size:.82rem;color:var(--bc3-warning)}
.bc3-resize-note:empty{display:none}
.bc3-draw-help{flex-basis:100%;margin:var(--bc3-space-1) 0;font-size:.82rem;color:var(--bc3-ink-faint)}
.bc3-grid:focus-visible{outline-offset:4px}
.bc3-inventory{overflow:auto;max-width:100%}
.bc3-inventory table{min-width:34rem;font-size:.86rem}
.bc3-placement-list button{min-height:44px;font-size:.82rem;overflow-wrap:anywhere}
.bc3-software-ref{overflow-wrap:anywhere}
.bc3-source-header h2,.bc3-viewer-header h2{margin:0 0 var(--bc3-space-2)}
@media (prefers-reduced-motion:reduce){.bc3-app *{scroll-behavior:auto!important;animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important}}
@media(max-width:320px){
  .bc3-app{max-width:100%;overflow-wrap:anywhere}
  .bc3-toolbar,.bc3-mode,.bc3-tabs,.bc3-viewer-controls{align-items:stretch}
  .bc3-tabs button,.bc3-mode button,.bc3-viewer-controls button{flex:1 1 44px}
  .bc3-mode input[type="range"]{width:100%;max-width:100%}
  .bc3-thickness-wrap{display:flex;flex-wrap:wrap;align-items:center;gap:var(--bc3-space-1);margin:var(--bc3-space-2) 0;font-size:.8rem}
  .bc3-thickness-wrap label{display:flex;align-items:center;gap:var(--bc3-space-1);width:100%}
  .bc3-thickness-wrap input[type="range"]{width:100%;max-width:100%}
  .bc3-thickness-wrap[hidden]{display:none}
  .bc3-source-panel,.bc3-viewer-panel{padding:var(--bc3-space-3)}
  .bc3-viewer-stage{min-height:240px}
  .bc3-reconstruction-grid>*{min-width:0}
}

.bc3-source-panel,.bc3-viewer-panel,.bc3-grid{box-sizing:border-box}
@media(max-width:520px){.bc3-toolbar label,.bc3-toolbar select{box-sizing:border-box;max-width:100%}}

.bc3-steps-panel{margin:0 0 var(--bc3-space-3);padding:var(--bc3-space-3) var(--bc3-space-4);border:1px solid var(--bc3-border);border-left:4px solid var(--bc3-accent);border-radius:var(--bc3-radius);background:var(--bc3-panel)}
.bc3-steps-panel[hidden]{display:none}
.bc3-steps-panel h3{margin:0 0 var(--bc3-space-1);font-size:1rem}
.bc3-steps-panel h4{margin:0 0 var(--bc3-space-1);font-size:.86rem}
.bc3-steps-intro{margin:0 0 var(--bc3-space-2);font-size:.84rem;color:var(--bc3-ink-muted)}
.bc3-steps-controls{display:flex;gap:var(--bc3-space-1);flex-wrap:wrap;align-items:center}
.bc3-steps-controls label{display:flex;align-items:center;gap:var(--bc3-space-1);font-size:.84rem;font-weight:600}
.bc3-steps-controls button{font:inherit;font-size:.82rem;font-weight:600;padding:6px 10px;border:1px solid var(--bc3-border-strong);border-radius:6px;background:var(--bc3-panel);cursor:pointer}
.bc3-steps-controls button:disabled{opacity:.5;cursor:default}
.bc3-step-position{margin:var(--bc3-space-2) 0 var(--bc3-space-1);font-size:.88rem;font-weight:700}
.bc3-step-detail{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:var(--bc3-space-3);margin:var(--bc3-space-2) 0 0}
.bc3-step-meta{margin:0 0 var(--bc3-space-1);font-size:.84rem;color:var(--bc3-ink-muted)}
.bc3-step-quantities,.bc3-step-warnings{list-style:none;margin:0;padding:0;display:grid;gap:var(--bc3-space-1)}
.bc3-step-quantity{padding:6px 8px;border:1px solid var(--bc3-border);border-radius:6px;background:var(--bc3-panel-alt);font-size:.86rem}
.bc3-step-quantity strong{font-variant-numeric:tabular-nums}
.bc3-step-warning{padding:6px 8px;border-left:3px solid var(--bc3-danger);border-radius:6px;background:var(--bc3-danger-bg);font-size:.82rem;line-height:1.35;color:#4a1010}
.bc3-app[data-theme="dark"] .bc3-step-warning{color:var(--bc3-ink)}
.bc3-step-warning.is-clear{border-left-color:var(--bc3-good);background:var(--bc3-good-bg);color:#14361f}
.bc3-app[data-theme="dark"] .bc3-step-warning.is-clear{color:var(--bc3-ink)}
.bc3-steps-disclaimer{margin:var(--bc3-space-2) 0 0;padding:var(--bc3-space-2) var(--bc3-space-3);border-left:3px solid var(--bc3-warning);background:var(--bc3-warning-bg);font-size:.82rem;line-height:1.4;color:#3f350f}
.bc3-app[data-theme="dark"] .bc3-steps-disclaimer{color:var(--bc3-ink)}
@media(max-width:520px){.bc3-steps-controls{align-items:stretch;flex-direction:column}.bc3-steps-controls button{width:100%}.bc3-step-detail{grid-template-columns:1fr}}

.bc3-gallery-section{margin:0 0 var(--bc3-space-4);padding:var(--bc3-space-4);border:1px solid var(--bc3-border);border-radius:var(--bc3-radius-lg);background:var(--bc3-panel);box-shadow:var(--bc3-shadow)}
.bc3-gallery-section[hidden]{display:none}
.bc3-gallery-tabs{display:flex;gap:2px;margin-bottom:var(--bc3-space-3);padding:2px;border:1px solid var(--bc3-border);border-radius:var(--bc3-radius);background:var(--bc3-panel-alt);width:fit-content}
.bc3-gallery-tab{font:inherit;font-size:.84rem;font-weight:600;padding:6px 12px;border:0;border-radius:6px;background:transparent;color:var(--bc3-ink-muted);cursor:pointer}
.bc3-gallery-tab.is-active{background:var(--bc3-panel);color:var(--bc3-ink);box-shadow:0 1px 2px rgba(0,0,0,.08)}
.bc3-gallery-status{min-height:1.3em;font-size:.84rem;color:var(--bc3-ink-muted)}
.bc3-gallery-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:var(--bc3-space-3)}
.bc3-gallery-card{border:1px solid var(--bc3-border);border-radius:var(--bc3-radius);padding:var(--bc3-space-3);background:var(--bc3-panel-alt);display:flex;flex-direction:column;gap:var(--bc3-space-1)}
.bc3-gallery-thumbs{display:flex;gap:var(--bc3-space-1)}
.bc3-gallery-thumb{display:flex;flex-direction:column;align-items:center;gap:2px;font-size:.7rem;color:var(--bc3-ink-faint)}
.bc3-gallery-thumb canvas{width:56px;height:56px;border:1px solid var(--bc3-border-strong);border-radius:4px;background:#fff;image-rendering:pixelated}
.bc3-gallery-title{margin:0;font-size:.92rem;font-weight:700;overflow-wrap:anywhere}
.bc3-gallery-meta{margin:0;font-size:.78rem;color:var(--bc3-ink-faint)}
.bc3-gallery-visibility{align-self:flex-start;font-size:.72rem;font-weight:600;padding:2px 8px;border-radius:999px;background:var(--bc3-border)}
.bc3-gallery-visibility.is-public{background:var(--bc3-good-bg);color:var(--bc3-good)}
.bc3-gallery-visibility.is-private{background:var(--bc3-panel);color:var(--bc3-ink-muted);border:1px solid var(--bc3-border)}
.bc3-gallery-actions{display:flex;gap:var(--bc3-space-1);margin-top:2px}
.bc3-gallery-actions button{font:inherit;font-size:.78rem;font-weight:600;padding:5px 8px;border:1px solid var(--bc3-border-strong);border-radius:6px;background:var(--bc3-panel);cursor:pointer}
.bc3-gallery-load-more{margin-top:var(--bc3-space-2);font:inherit;font-size:.84rem;font-weight:600;padding:6px 10px;border:1px solid var(--bc3-border-strong);border-radius:6px;background:var(--bc3-panel);cursor:pointer}
.bc3-gallery-load-more[hidden]{display:none}

/* Workspace layout: settings in a sticky sidebar, editors and preview in the
   main column, like a desktop design tool. Stacks below 1100px. */
.bc3-app{max-width:1600px}
.bc3-layout{display:grid;grid-template-columns:340px minmax(0,1fr);gap:var(--bc3-space-4);align-items:start}
.bc3-sidebar{position:sticky;top:var(--bc3-space-4);max-height:calc(100vh - 2 * var(--bc3-space-4));overflow-y:auto;overscroll-behavior:contain;padding-right:2px}
.bc3-main{min-width:0}
.bc3-sidebar .bc3-toolbar{margin:0}
.bc3-custom-dims{grid-template-columns:repeat(3,minmax(0,1fr))}
.bc3-custom-dims>legend,.bc3-custom-dims>p{grid-column:1/-1}
.bc3-custom-dims input[type="number"]{width:100%;box-sizing:border-box;min-width:0}
.bc3-dim{display:grid;grid-template-rows:auto auto auto;gap:2px;align-content:end;font-weight:600}
.bc3-dim small{font-weight:400;color:var(--bc3-ink-faint,#777);font-size:.75rem}
.bc3-cutout-wrap{display:grid;gap:2px;margin:var(--bc3-space-2) 0;font-size:.8rem}
.bc3-cutout-wrap label{display:flex;align-items:center;gap:var(--bc3-space-1);font-weight:600}
.bc3-cutout-wrap label input{width:auto;margin:0}
.bc3-cutout-wrap small{color:var(--bc3-ink-faint,#777);line-height:1.35}
.bc3-cutout-wrap[hidden]{display:none}
.bc3-examples{display:flex;flex-wrap:wrap;align-items:end;gap:var(--bc3-space-2);margin:0 0 var(--bc3-space-3);padding:var(--bc3-space-2) var(--bc3-space-3);border:1px solid var(--bc3-border,#ccc);border-radius:var(--bc3-radius,8px);background:var(--bc3-panel,transparent)}
.bc3-examples label{display:grid;gap:2px;font-weight:600;flex:1 1 260px}
.bc3-status-bar{transition:background-color .3s,border-color .3s}
.bc3-status-bar.is-busy{border-color:var(--bc3-accent);background:linear-gradient(90deg,color-mix(in srgb,var(--bc3-accent) 8%,var(--bc3-panel)),color-mix(in srgb,var(--bc3-accent) 26%,var(--bc3-panel)),color-mix(in srgb,var(--bc3-accent) 8%,var(--bc3-panel)));background-size:300% 100%;animation:bc3-busy 1.6s linear infinite}
.bc3-status-bar.is-busy .bc3-analysis-status{font-weight:700}
/* The mascot as a tumbling 3D cube while work runs (D-041): six faces, each the yellow brick with two eyes from the logo. */
.bc3-busy-cube{display:none;width:22px;height:22px;flex:0 0 22px;perspective:140px}
.bc3-status-bar.is-busy .bc3-busy-cube{display:inline-block}
.bc3-busy-cube-body{position:relative;display:block;width:100%;height:100%;transform-style:preserve-3d;animation:bc3-cube-tumble 1.8s linear infinite}
.bc3-busy-cube-body i{position:absolute;inset:0;border-radius:4px;background:radial-gradient(circle at 7px 7px,var(--bc3-panel) 2.6px,transparent 3.1px),radial-gradient(circle at 15px 7px,var(--bc3-panel) 2.6px,transparent 3.1px),var(--bc3-accent);box-shadow:inset 0 -2px 0 rgba(0,0,0,.18),inset 0 0 0 1px rgba(0,0,0,.12)}
.bc3-busy-cube-body i:nth-child(1){transform:translateZ(11px)}
.bc3-busy-cube-body i:nth-child(2){transform:rotateY(90deg) translateZ(11px);filter:brightness(.88)}
.bc3-busy-cube-body i:nth-child(3){transform:rotateY(180deg) translateZ(11px)}
.bc3-busy-cube-body i:nth-child(4){transform:rotateY(-90deg) translateZ(11px);filter:brightness(.88)}
.bc3-busy-cube-body i:nth-child(5){transform:rotateX(90deg) translateZ(11px);filter:brightness(1.08)}
.bc3-busy-cube-body i:nth-child(6){transform:rotateX(-90deg) translateZ(11px);filter:brightness(.78)}
@keyframes bc3-cube-tumble{0%{transform:rotateX(-22deg) rotateY(0deg)}50%{transform:rotateX(-22deg) rotateY(180deg) translateY(-2px)}100%{transform:rotateX(-22deg) rotateY(360deg)}}
@keyframes bc3-busy{from{background-position:100% 0}to{background-position:-200% 0}}
@keyframes bc3-spin{to{transform:rotate(360deg)}}
@media (prefers-reduced-motion:reduce){.bc3-status-bar.is-busy,.bc3-busy-cube-body{animation:none}.bc3-busy-cube-body{transform:rotateX(-22deg) rotateY(-30deg)}}
.bc3-magic-explainer{margin:var(--bc3-space-2) 0}
.bc3-magic-explainer summary{font-weight:700;cursor:pointer}
.bc3-diagram{display:block;width:100%;max-width:420px;height:auto;margin:var(--bc3-space-2) auto}
/* The wall and its shadow keep real-world colours in either theme. */
.bc3-dg-wall{fill:#ece7da}
.bc3-dg-line,.bc3-dg-edge{stroke:var(--bc3-ink-muted,#666);stroke-width:1.5;fill:none}
.bc3-dg-beam{fill:color-mix(in srgb,var(--bc3-accent) 22%,transparent)}
.bc3-dg-ray{stroke:var(--bc3-accent-strong,#c90);stroke-width:1.5;stroke-dasharray:5 4}
.bc3-dg-rod{stroke:var(--bc3-ink-muted,#777);stroke-width:3}
.bc3-dg-cube{fill:var(--bc3-accent);stroke:var(--bc3-ink);stroke-width:1.5}
.bc3-dg-shadow{fill:#34373c}
.bc3-dg-lamp{fill:#ffd84d;stroke:var(--bc3-ink);stroke-width:1}
.bc3-dg-arc{fill:none;stroke:var(--bc3-ink);stroke-width:1.2}
.bc3-dg-text{font-size:10px;fill:var(--bc3-ink)}
.bc3-dg-word{font-size:12px;font-weight:800;fill:#fbf8ef}
.bc3-link-button{background:none;border:0;padding:0;min-height:0!important;color:var(--bc3-accent-strong,inherit);text-decoration:underline;font:inherit;cursor:pointer}
.bc3-credit{font-size:.85rem}
.bc3-credit a{color:var(--bc3-accent);font-weight:700}
.bc3-examples select{height:36px;width:100%;box-sizing:border-box;padding:0 var(--bc3-space-2);border:1px solid var(--bc3-border-strong);border-radius:var(--bc3-radius);background:var(--bc3-panel);color:var(--bc3-ink)}
.bc3-card-save .bc3-button-row{display:flex;flex-wrap:wrap;gap:var(--bc3-space-2)}
.bc3-card-save .bc3-save-status:empty,.bc3-card-save .bc3-load-status:empty,.bc3-card-save .bc3-validation-status:empty,.bc3-card-save .bc3-share-link:empty{display:none}
.bc3-toolbar input[type="range"],.bc3-base-panel input[type="range"]{-webkit-appearance:none;appearance:none;height:6px;border-radius:3px;background:var(--bc3-border);margin:var(--bc3-space-2) 0}
.bc3-toolbar input[type="range"]::-webkit-slider-thumb,.bc3-base-panel input[type="range"]::-webkit-slider-thumb{-webkit-appearance:none;appearance:none;width:18px;height:18px;border-radius:50%;background:var(--bc3-accent);border:2px solid var(--bc3-accent-strong);cursor:pointer}
.bc3-toolbar input[type="range"]::-moz-range-thumb,.bc3-base-panel input[type="range"]::-moz-range-thumb{width:16px;height:16px;border-radius:50%;background:var(--bc3-accent);border:2px solid var(--bc3-accent-strong);cursor:pointer}
@media(max-width:1100px){
  .bc3-layout{grid-template-columns:1fr}
  .bc3-sidebar{position:static;max-height:none;overflow:visible;padding-right:0}
}
@media(max-width:520px){.bc3-custom-dims{grid-template-columns:1fr}}
.bc3-sidebar fieldset{min-width:0;max-width:100%;box-sizing:border-box}
.bc3-sidebar select,.bc3-sidebar input[type="text"]{width:100%;max-width:100%;box-sizing:border-box;min-width:0}

/* Header tools and full width (D-039). Full width breaks out of the theme's content column. */
.bc3-header-tools{display:flex;gap:var(--bc3-space-2);align-items:flex-start;flex-wrap:wrap;justify-content:flex-end}
.bc3-header-tools>button{min-height:36px;font:inherit;font-size:.85rem;font-weight:600}
.bc3-wide-toggle[aria-pressed="true"]{border-color:var(--bc3-focus)}
.bc3-app.bc3-wide{max-width:none;width:calc(100vw - 48px);margin-left:calc(50% - 50vw + 24px);margin-right:0}
@media(max-width:900px){.bc3-wide-toggle{display:none}.bc3-app.bc3-wide{width:auto;margin-left:auto;margin-right:auto}}
.bc3-image-tips{margin:var(--bc3-space-2) 0 0;font-size:.78rem}
/* Save safeguards (D-042). */
.bc3-save-target{margin:var(--bc3-space-2) 0;font-size:.8rem;color:var(--bc3-ink-muted)}
.bc3-save-confirm{margin-top:var(--bc3-space-2);padding:var(--bc3-space-2) var(--bc3-space-3);border:1px solid var(--bc3-accent);border-radius:var(--bc3-radius);background:color-mix(in srgb,var(--bc3-accent) 10%,var(--bc3-panel))}
.bc3-save-confirm-text{margin:0 0 var(--bc3-space-2);font-size:.82rem;font-weight:600}
/* Examples in the gallery (D-043). */
.bc3-gallery-example-flag{display:flex;align-items:center;gap:6px;margin-top:var(--bc3-space-2);font-size:.8rem;font-weight:600}
.bc3-gallery-admin-hint{margin:0 0 var(--bc3-space-3)}
/* Full width keeps each card's content centred at a readable width (D-044). */
.bc3-app.bc3-wide .bc3-source-panel>*{max-width:600px;margin-left:auto;margin-right:auto}
.bc3-app.bc3-wide .bc3-examples{max-width:1100px;margin-left:auto;margin-right:auto}
.bc3-source-panel .bc3-grid{margin-left:auto;margin-right:auto}
.bc3-orbit-buttons{display:inline-flex;gap:2px;margin-left:var(--bc3-space-2)}
.bc3-orbit-buttons button{min-width:34px}
/* Magic angle: editors in spin order, View A (Front), B (Side), C (Top) (D-044). */
.bc3-sources.is-magic>bc3-source[label="Front"]{order:1}
.bc3-sources.is-magic>bc3-source[label="Side"]{order:2}
.bc3-sources.is-magic>bc3-source[label="Top"]{order:3}