:root{--bg:#0b0e12;--panel:#141920;--panel2:#1b222b;--line:#2b3542;--text:#e9edf2;--muted:#8f9baa;--accent:#4d8dff;--danger:#df5252}*{box-sizing:border-box}html,body{margin:0;height:100%;font-family:Segoe UI,Arial,sans-serif;background:var(--bg);color:var(--text);overflow:hidden}button,input,select{font:inherit}button,.file-btn{background:#202833;color:#e8edf4;border:1px solid #34404f;border-radius:7px;padding:8px 10px;cursor:pointer}button:hover,.file-btn:hover{background:#293443}button.active,.primary{background:#245fbb;border-color:#3d83e8}.danger{background:#5a2528;border-color:#874146}.hidden{display:none!important}header{height:72px;padding:10px 16px;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;align-items:center;background:#10151b}h1{font-size:20px;margin:0}h1 span{font-size:12px;color:#77a8ff}header p{margin:3px 0 0;color:var(--muted);font-size:12px}.header-actions{display:flex;gap:6px;align-items:center}.file-btn input{display:none}main{display:grid;grid-template-columns:230px 1fr 250px;height:calc(100vh - 72px)}aside{background:var(--panel);overflow:auto;padding:12px;border-right:1px solid var(--line)}.right-panel{border-right:0;border-left:1px solid var(--line)}section{margin-bottom:16px}h2{font-size:13px;text-transform:uppercase;letter-spacing:.06em;color:#aab5c2;margin:4px 0 8px}label{display:flex;justify-content:space-between;align-items:center;gap:8px;font-size:12px;color:#aeb8c5;margin:6px 0}input,select{width:112px;background:#0f141a;color:#e9edf2;border:1px solid #313c49;border-radius:5px;padding:6px}.asset-grid{display:grid;grid-template-columns:1fr 1fr;gap:6px}.asset{padding:9px 6px}.asset small{display:block;color:#8593a4;font-size:10px;margin-top:2px}.inline-check{justify-content:flex-start}.inline-check input{width:auto}.workspace{min-width:0;display:flex;flex-direction:column}.tabs,.toolbar{height:42px;display:flex;align-items:center;gap:6px;padding:5px 8px;background:#11171e;border-bottom:1px solid var(--line)}.tabs span{margin-left:auto;color:#8390a0;font-size:12px}.toolbar{height:40px;overflow-x:auto}.toolbar label{margin:0;white-space:nowrap}.toolbar select{width:auto}.sep{width:1px;height:24px;background:#394452;margin:0 3px}.canvas-wrap{position:relative;flex:1;min-height:0;background:#0a0d11}.canvas-wrap canvas,#techViewport{position:absolute;inset:0;width:100%;height:100%;touch-action:none}.loading3d{position:absolute;inset:0;display:grid;place-items:center;background:#0b0f14;color:#9eb2cb}.statusbar{height:28px;background:#10151b;border-top:1px solid var(--line);display:flex;gap:18px;align-items:center;padding:0 10px;color:#8694a5;font-size:11px}.statusbar #statusMsg{margin-left:auto}.empty,.hint{font-size:12px;color:#8793a1;line-height:1.45}.row-actions{display:flex;flex-wrap:wrap;gap:6px;margin-top:9px}.metrics{display:grid;gap:4px}.metrics div{display:flex;justify-content:space-between;background:#10151b;padding:6px;border-radius:4px;font-size:11px}.metrics b{color:#dce5ef}.mobile-bar{position:fixed;z-index:50;left:50%;bottom:12px;transform:translateX(-50%);display:flex;gap:5px;padding:6px;background:#111820;border:1px solid #344252;border-radius:10px;box-shadow:0 10px 30px #0008}#techViewport{overflow:auto;background:#73777d;padding:20px}#techViewport svg{display:block;margin:auto;max-width:none;background:#fff;box-shadow:0 3px 16px #0006}.tech-label{font-family:Arial,sans-serif}.dim{stroke:#111;stroke-width:2;fill:none}.dimText{font-family:Arial,sans-serif;font-size:28px;fill:#111}.objText{font-family:Arial,sans-serif;font-size:22px;font-weight:600;fill:#111}.roomLine{stroke:#111;stroke-width:5;fill:none}.tableLine{stroke:#111;stroke-width:3;fill:white}.chairLine{stroke:#333;stroke-width:2;fill:white}.dimAux{stroke:#777;stroke-width:1.5;fill:none}@media(max-width:900px){header{height:58px}.header-actions button:nth-child(n+5),.header-actions .file-btn{display:none}main{grid-template-columns:1fr;height:calc(100vh - 58px)}.left-panel,.right-panel{display:none}.tabs,.toolbar{white-space:nowrap}.mobile-bar:not(.hidden){display:flex}}
.align-grid{display:grid;grid-template-columns:1fr 1fr 1fr;gap:5px}.align-grid button{padding:7px 4px;font-size:11px}.camera-tip{margin-left:auto;color:#6f7d8d;font-size:10px;white-space:nowrap}.rotate-handle{cursor:grab}.rotate-handle:active{cursor:grabbing}@media(max-width:1100px){.camera-tip{display:none}}

#techZoomLabel{min-width:46px;text-align:center;color:#c7d0da;font-size:11px;font-variant-numeric:tabular-nums}.summaryBox{font-family:Arial,sans-serif}

.stack-actions{display:grid;grid-template-columns:1fr 1fr;gap:6px;margin-top:8px}.snap-guide{pointer-events:none}

/* ===== v3.5 mobile + box select + custom assets ===== */
.mobile-only{display:none}.custom-upload{display:block;text-align:center;margin:6px 0 10px}.custom-assets{margin-top:8px}.custom-assets:empty{display:none}.selection-marquee{pointer-events:none}.mobile-backdrop{position:fixed;inset:58px 0 0;background:#0008;z-index:69}.asset-thumb{width:100%;height:44px;object-fit:contain;background:#0e1319;border-radius:5px;margin-bottom:4px}.mobile-bar{max-width:calc(100vw - 16px);overflow-x:auto;white-space:nowrap}.mobile-bar button{flex:0 0 auto}
@media(max-width:900px){
  .mobile-only{display:inline-flex}.left-panel{display:block;position:fixed;z-index:70;left:0;top:58px;bottom:0;width:min(86vw,340px);transform:translateX(-105%);transition:transform .2s ease;box-shadow:12px 0 35px #0009;border-right:1px solid var(--line)}.left-panel.mobile-open{transform:translateX(0)}
  .right-panel{display:none}.tabs{overflow-x:auto}.tabs #modeLabel{display:none}.workspace{width:100vw}.statusbar{gap:8px;overflow:hidden}.statusbar span{white-space:nowrap}.statusbar #scaleInfo{max-width:48vw;overflow:hidden;text-overflow:ellipsis}
  .mobile-bar{left:8px;right:8px;transform:none;bottom:8px;justify-content:flex-start;border-radius:12px;padding:7px}.mobile-bar button{min-height:42px;padding:8px 11px}
  button,.file-btn,input,select{min-height:40px}.asset{min-height:54px}.canvas-wrap canvas{touch-action:none}
}

/* ===== v3.6 2D viewport controls ===== */
#zoom2dLabel{min-width:48px;text-align:center;color:#d1d9e3;font-size:11px;font-variant-numeric:tabular-nums}.zoom-help{color:#798798;font-size:11px;white-space:nowrap}@media(max-width:900px){#toolbar2d{height:46px;overflow-x:auto;padding-left:8px;padding-right:8px}#toolbar2d button{min-width:46px;min-height:36px}.zoom-help{display:none}#zoom2dLabel{min-width:52px;font-size:12px}}


/* ===== v3.6.1 mobile responsive shell ===== */
.mobile-drawer-head{display:none}
@media(max-width:900px){
  html,body{height:100%;height:100dvh;overflow:hidden}
  body{display:flex;flex-direction:column}
  header{height:auto;min-height:0;flex:0 0 auto;padding:7px 8px 6px;display:block;overflow:hidden}
  .brand-block{display:flex;align-items:baseline;gap:8px;min-width:0;margin-bottom:6px}
  .brand-block h1{font-size:17px;line-height:1.15;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:100%}
  .brand-block h1 span{font-size:11px}
  .brand-block p{display:none}
  .header-actions{width:100%;display:flex;gap:6px;overflow-x:auto;overscroll-behavior-x:contain;scrollbar-width:none;padding-bottom:1px}
  .header-actions::-webkit-scrollbar,.tabs::-webkit-scrollbar,.toolbar::-webkit-scrollbar{display:none}
  .header-actions button,.header-actions .file-btn{display:inline-flex!important;flex:0 0 auto;min-height:38px;padding:7px 11px;align-items:center}
  .header-actions button:nth-child(n+5),.header-actions .file-btn{display:none!important}
  main{flex:1 1 auto;height:auto!important;min-height:0;grid-template-columns:1fr}
  .workspace{height:100%;min-height:0;width:100%;overflow:hidden}
  .tabs{height:48px;min-height:48px;overflow-x:auto;overflow-y:hidden;gap:6px;padding:5px 7px;scrollbar-width:none;overscroll-behavior-x:contain}
  .tabs button{flex:0 0 auto;min-height:38px;padding:7px 12px}
  #toolbar2d,.toolbar{flex:0 0 auto;min-height:46px;height:46px;overflow-x:auto;overflow-y:hidden;scrollbar-width:none;overscroll-behavior-x:contain}
  .canvas-wrap{flex:1 1 auto;min-height:180px}
  .statusbar{height:30px;min-height:30px;padding:0 7px;font-size:10px}
  .statusbar #cursorInfo{display:none}
  .statusbar #scaleInfo{max-width:60vw}
  .mobile-drawer-head{display:flex;position:sticky;top:0;z-index:3;align-items:center;justify-content:space-between;background:#111820;border-bottom:1px solid var(--line);margin:-12px -12px 12px;padding:10px 12px;font-size:14px}
  .mobile-drawer-head button{min-width:42px;min-height:38px;padding:4px 10px;font-size:24px;line-height:1}
  .left-panel,.right-panel{display:block;position:fixed;z-index:80;top:0;bottom:0;width:min(88vw,380px);padding:12px;padding-top:12px;overflow-y:auto;overscroll-behavior:contain;background:var(--panel);box-shadow:0 0 36px #000b;transition:transform .22s ease}
  .left-panel{left:0;transform:translateX(-104%);border-right:1px solid var(--line)}
  .right-panel{right:0;left:auto;transform:translateX(104%);border-left:1px solid var(--line)}
  .left-panel.mobile-open,.right-panel.mobile-open{transform:translateX(0)}
  .mobile-backdrop{inset:0;z-index:79;background:#0009;backdrop-filter:blur(1px)}
  .asset-grid{grid-template-columns:1fr 1fr}
  .asset{min-height:58px;font-size:13px}
  .mobile-bar{z-index:65;bottom:max(8px,env(safe-area-inset-bottom));left:8px;right:8px;max-width:none}
  .canvas-wrap{padding-bottom:env(safe-area-inset-bottom)}
}
@media(max-width:420px){
  .brand-block h1{font-size:15px}
  .tabs button{padding-left:10px;padding-right:10px;font-size:13px}
  #toolbar2d button{min-width:44px}
  .left-panel,.right-panel{width:92vw}
}


/* ===== v3.6.2 mobile workspace library + group editing ===== */
@media(max-width:900px){
  .left-panel{left:0!important;right:0!important;top:auto!important;bottom:0!important;width:100vw!important;height:min(46vh,480px)!important;max-height:52vh!important;transform:translateY(105%)!important;border-right:0!important;border-top:1px solid var(--line)!important;border-radius:18px 18px 0 0!important;box-shadow:0 -14px 38px #000a!important;padding-bottom:max(18px,env(safe-area-inset-bottom))!important}
  .left-panel.mobile-open{transform:translateY(0)!important}
  .left-panel .mobile-drawer-head{border-radius:18px 18px 0 0;cursor:grab}
  .left-panel .asset-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:7px}
  .left-panel .asset{min-height:58px;padding:7px 5px;font-size:14px}
  .left-panel section{margin-bottom:12px}
  .left-panel #customAssetSection label:not(.file-btn){display:grid;grid-template-columns:1fr 110px;gap:8px}
  .left-panel #customAssetSection input,.left-panel #customAssetSection select{width:110px}
  .mobile-backdrop.library-mode{display:none!important}
  .mobile-bar{overflow-x:auto;overscroll-behavior-x:contain;scrollbar-width:none}
  .mobile-bar .mobile-sep{display:block;flex:0 0 1px;height:28px;background:#44505e;margin:6px 3px}
  .mobile-bar [data-mobile-align]{min-width:68px}
}
@media(max-width:430px){.left-panel .asset-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.left-panel{height:44vh!important}}

/* ===== v3.6.4 mobile asset placement visibility ===== */
@media(max-width:900px){
  .left-panel .asset{touch-action:manipulation;-webkit-tap-highlight-color:transparent;user-select:none;-webkit-user-select:none}
  .left-panel .asset:active{transform:scale(.985);background:#2d3b4d}
  .left-panel .asset-grid{touch-action:pan-y}
  body.asset-place-mode .canvas-wrap{box-shadow:inset 0 0 0 2px #4d8dff,inset 0 0 36px #245fbb33}
  #placeModeBadge{position:fixed;z-index:95;left:50%;bottom:max(86px,calc(env(safe-area-inset-bottom) + 72px));transform:translateX(-50%);background:#245fbb;color:#fff;border:1px solid #5d9fff;border-radius:999px;padding:10px 16px;font-weight:700;font-size:14px;box-shadow:0 8px 28px #0009;pointer-events:none;white-space:nowrap}
}

/* ===== v3.6.4 force canvas-visible placement mode ===== */
@media(max-width:900px){
  body.placing-asset .left-panel{transform:translateY(112%)!important;pointer-events:none!important;visibility:hidden!important;}
  body.placing-asset .mobile-backdrop{display:none!important;}
  body.placing-asset .canvas-wrap{z-index:2;}
  body.placing-asset #placeModeBadge{pointer-events:auto;}
}

@media(max-width:900px){#placeModeCancel{position:fixed;z-index:96;right:14px;bottom:max(88px,calc(env(safe-area-inset-bottom) + 74px));min-height:42px;padding:8px 13px;background:#5a2528;border-color:#874146;color:#fff;border-radius:999px;font-weight:700}}