:root{
    --accent:#26A0DA; --accent-d:#1A86BC; --accent-l:#EAF6FC;
    --ink:#2B3A45; --ink-2:#3D4853; --muted:#5E6B75; --muted-2:#8795A0; --faint:#9AA7B0;
    --line:#E1E6EB; --line-2:#EDF1F5; --panel:#FFFFFF; --soft:#F6F8FA; --app:#E9EDF1;
  }
  *{box-sizing:border-box;}
  html,body{margin:0;height:100%;}
  body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;color:var(--ink);background:var(--app);-webkit-font-smoothing:antialiased;}
  button{font-family:inherit;}
  input,select,textarea{font-family:inherit;}
  ::selection{background:var(--accent);color:#fff;}

  .app{height:100vh;display:flex;flex-direction:column;overflow:hidden;}

  /* ---------- header ---------- */
  .header{display:flex;align-items:center;gap:14px;height:56px;flex:none;padding:0 14px 0 16px;background:var(--panel);border-bottom:1px solid var(--line);z-index:30;}
  .logo{display:flex;align-items:center;gap:3px;}
  .logo b{width:22px;height:22px;border-radius:5px;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:800;font-size:13px;box-shadow:inset 0 1px 0 rgba(255,255,255,.4);}
  .logo .w{margin-left:7px;font-weight:800;font-size:16px;letter-spacing:-.01em;color:var(--ink);}
  .proj{margin-left:6px;border:1px solid var(--line);background:#fff;font-size:14px;font-weight:500;color:var(--ink);padding:8px 13px;border-radius:9px;width:240px;outline:none;transition:border-color .12s,box-shadow .12s;}
  .proj:hover{border-color:#CBD3DB;}
  .proj:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(38,160,218,.14);}
  .saveDot{display:flex;align-items:center;gap:6px;font-size:12px;color:var(--muted-2);white-space:nowrap;}
  .saveDot i{width:7px;height:7px;border-radius:50%;background:#46A85E;transition:background .2s;}
  .saveDot.dirty i{background:#E0B23A;}
  .spacer{flex:1;}
  .acc{width:36px;height:36px;border:none;border-radius:9px;background:transparent;color:var(--muted);cursor:pointer;display:inline-flex;align-items:center;justify-content:center;transition:background .12s,color .12s;}
  .acc:hover{background:var(--line-2);color:var(--ink);}
  .acc.on{background:var(--accent-l);color:var(--accent);}
  .avatar{width:34px;height:34px;border-radius:50%;background:linear-gradient(135deg,var(--accent),#7FD0F0);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:600;font-size:13px;}
  .vsep{width:1px;height:22px;background:var(--line);flex:none;}

  /* ---------- toolbar ---------- */
  .toolbar{display:flex;align-items:center;gap:2px;height:54px;flex:none;padding:0 12px;background:var(--soft);border-bottom:1px solid var(--line);z-index:20;overflow-x:auto;}
  .toolbar::-webkit-scrollbar{height:0;}
  .tb{width:34px;height:34px;border:none;background:transparent;border-radius:8px;color:var(--muted);cursor:pointer;display:inline-flex;align-items:center;justify-content:center;flex:none;transition:background .12s,color .12s;position:relative;}
  .tb:hover{background:#E7ECF1;color:var(--ink);}
  .tb.del:hover{background:#FBE3DE;color:#D8503D;}
  .tb.wide{width:auto;padding:0 7px 0 8px;gap:3px;}
  .tb[disabled]{opacity:.34;pointer-events:none;}
  .tb.flash{background:var(--accent-l);color:var(--accent);}
  .tsep{width:1px;height:22px;background:var(--line);margin:0 5px;flex:none;}
  .pill{display:flex;align-items:center;gap:2px;background:#E7ECF1;border-radius:9px;padding:3px;flex:none;}
  .pill button{position:relative;width:32px;height:28px;border:none;background:transparent;border-radius:7px;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;color:var(--muted);}
  .pill button.on{background:#fff;box-shadow:0 1px 2px rgba(45,80,110,.16);color:var(--accent);}
  .snap{width:34px;height:34px;border:none;background:transparent;border-radius:8px;color:var(--muted);cursor:pointer;display:inline-flex;align-items:center;justify-content:center;flex:none;}
  .snap.on{background:var(--accent-l);color:var(--accent);}
  .topbtn{padding:8px 15px;border:1px solid var(--line);background:#fff;border-radius:8px;color:var(--ink-2);font-size:13.5px;font-weight:600;cursor:pointer;flex:none;transition:background .12s,border-color .12s;}
  .topbtn:hover{background:var(--accent-l);border-color:#BFE2F5;}

  /* ---------- workspace ---------- */
  .work{flex:1;min-height:0;display:flex;}
  .stage{flex:1;position:relative;min-width:0;overflow:hidden;cursor:grab;user-select:none;-webkit-user-select:none;background:radial-gradient(135% 120% at 50% 0%,#FFFFFF 0%,#E2EEF6 100%);perspective:1500px;perspective-origin:50% 42%;}
  .stage.grab{cursor:grabbing;}
  .scene{position:absolute;left:50%;top:53%;width:0;height:0;transform-style:preserve-3d;will-change:transform;}
  .floor{
    position:absolute;left:-620px;top:-620px;width:1240px;height:1240px;
    transform-style:flat;
    background-color:#EAF6FD;
    background-image:
      linear-gradient(#a8d6ef 1px,transparent 1px),
      linear-gradient(90deg,#a8d6ef 1px,transparent 1px),
      linear-gradient(#d3ecfa 1px,transparent 1px),
      linear-gradient(90deg,#d3ecfa 1px,transparent 1px);
    background-size:96px 96px,96px 96px,24px 24px,24px 24px;
    background-position:center center;
    border:2px solid #5bb8e6;
    box-shadow:0 0 0 1px rgba(91,184,230,.25);
    opacity:.97;
  }
  .stage-fade{position:absolute;inset:0;pointer-events:none;z-index:3;background:radial-gradient(120% 82% at 50% 38%,transparent 56%,rgba(226,238,246,.5) 100%);}
  .wmPlane{position:absolute;left:0;top:0;transform:translate3d(-290px,236px,1px);transform-origin:0 0;pointer-events:none;font-weight:800;font-size:82px;line-height:1;letter-spacing:1px;white-space:nowrap;color:#A6C2D8;opacity:.6;}

  /* origin axis gizmo (lies on the workplane) */
  .axes{position:absolute;left:0;top:0;pointer-events:none;z-index:2;transform-style:preserve-3d;}
  .axes .o{position:absolute;left:-5px;top:-5px;width:10px;height:10px;border-radius:50%;background:#fff;border:2px solid #7C8A95;box-shadow:0 0 0 3px rgba(255,255,255,.5);}
  .axes .ax{position:absolute;left:0;top:-1.5px;height:3px;width:66px;border-radius:2px;transform-origin:0 50%;}
  .axes .axx{background:#E5533B;}
  .axes .axy{background:#46A85E;transform:rotate(90deg);}
  .axes .tag{position:absolute;font:800 10px/1 -apple-system,Arial,sans-serif;color:#fff;padding:2px 4px;border-radius:4px;transform:translate(-50%,-50%);}
  .axes .tx{left:74px;top:0;background:#E5533B;}
  .axes .ty{left:0;top:74px;background:#46A85E;}
  .axes .ax,.axes .tag{display:none;}

  /* contact shadows */
  #shadows{position:absolute;left:0;top:0;transform-style:preserve-3d;}
  .gshadow{position:absolute;left:0;top:0;border-radius:50%;background:radial-gradient(closest-side,rgba(40,72,100,.36),rgba(40,72,100,0));pointer-events:none;}

  .navcube{position:absolute;top:18px;left:18px;width:104px;height:104px;perspective:520px;z-index:9;filter:drop-shadow(0 6px 8px rgba(45,80,110,.16));}
  .navcube .cube{position:absolute;left:50%;top:50%;width:62px;height:62px;margin:-31px;transform-style:preserve-3d;transform:rotateX(-48deg) rotateY(-22deg);cursor:grab;}
  .navcube .cube:active{cursor:grabbing;}
  .navcube .face{position:absolute;width:62px;height:62px;border:1px solid #B7C2CC;background:rgba(255,255,255,.98);display:flex;align-items:center;justify-content:center;font:700 10px/1 -apple-system,Arial,sans-serif;color:#7C8A95;letter-spacing:.06em;}
  .navcube .face:hover{background:var(--accent-l);color:var(--accent);border-color:#9fd3ee;}
  .navcube .ft{transform:rotateX(90deg) translateZ(31px);}
  .navcube .fbo{transform:rotateX(-90deg) translateZ(31px);}
  .navcube .ff{transform:translateZ(31px);background:var(--accent-l);color:var(--accent);}
  .navcube .fk{transform:rotateY(180deg) translateZ(31px);}
  .navcube .fl{transform:rotateY(-90deg) translateZ(31px);}
  .navcube .fr{transform:rotateY(90deg) translateZ(31px);}
  .camcol{position:absolute;left:24px;top:50%;transform:translateY(-50%);display:flex;flex-direction:column;gap:7px;}
  .cbtn{width:40px;height:40px;border:1px solid var(--line);background:rgba(255,255,255,.94);border-radius:50%;color:var(--muted);cursor:pointer;display:flex;align-items:center;justify-content:center;box-shadow:0 2px 5px rgba(45,80,110,.08);transition:border-color .12s,color .12s;}
  .cbtn:hover{border-color:#BFE2F5;color:var(--accent);}

  .botbar{position:absolute;right:18px;bottom:14px;display:flex;align-items:center;gap:10px;z-index:6;}
  .chip{height:30px;padding:0 12px;border:1px solid var(--line);background:rgba(255,255,255,.94);border-radius:8px;display:flex;align-items:center;gap:8px;font-size:12.5px;color:var(--muted);}
  .chip b{font-weight:600;color:var(--ink);}
  .mono{font-family:ui-monospace,Menlo,Consolas,monospace;}
  .lbtn{height:30px;padding:0 14px;border:1px solid var(--line);background:rgba(255,255,255,.94);border-radius:8px;color:var(--muted);font-size:12.5px;font-weight:500;cursor:pointer;}
  .lbtn:hover{border-color:#BFE2F5;color:var(--ink);}
  .chipBtn{cursor:pointer;transition:border-color .12s,color .12s;}
  .chipBtn:hover{border-color:#BFE2F5;}
  .chipBtn:hover b{color:var(--accent);}

  .snapMenu{position:absolute;right:18px;bottom:52px;background:#fff;border:1px solid var(--line);border-radius:12px;box-shadow:0 16px 34px rgba(45,80,110,.22);padding:6px;z-index:12;display:none;min-width:150px;}
  .snapMenu.on{display:block;animation:pop .14s ease;}
  .snapMenu .mh{font:600 10.5px/1 -apple-system;letter-spacing:.06em;text-transform:uppercase;color:var(--muted-2);padding:6px 10px 8px;}
  .snapMenu button{display:flex;width:100%;align-items:center;justify-content:space-between;gap:14px;border:none;background:transparent;padding:8px 10px;border-radius:8px;font-size:13px;color:var(--ink);cursor:pointer;}
  .snapMenu button:hover{background:var(--accent-l);}
  .snapMenu button.on{color:var(--accent);font-weight:700;}
  .snapMenu button.on::after{content:"✓";}
  @keyframes pop{from{opacity:0;transform:translateY(6px);}to{opacity:1;transform:none;}}

  .emptyState{position:absolute;left:50%;top:44%;transform:translate(-50%,-50%);text-align:center;pointer-events:none;z-index:4;display:none;}
  .emptyState svg{opacity:.5;margin-bottom:12px;}
  .emptyState div{font-size:14.5px;font-weight:600;color:#8AA6BC;}
  .emptyState small{display:block;margin-top:5px;font-size:12.5px;font-weight:500;color:#A9BECD;}

  /* scene shapes (billboarded sprites riding the workplane) */
  .obj{position:absolute;left:0;top:0;width:0;height:0;cursor:pointer;user-select:none;-webkit-user-select:none;z-index:5;transform-origin:0 0;transform-style:preserve-3d;}
  .obj .art{position:absolute;left:0;bottom:0;transform-origin:50% 100%;transform:translateX(-50%);filter:drop-shadow(0 12px 10px rgba(45,80,110,.22));}
  .obj .art svg{display:block;width:100%;height:100%;}
  .obj .solid{position:absolute;left:0;top:0;transform-style:preserve-3d;}
  .face{position:absolute;left:0;top:0;box-sizing:border-box;}
  .obj.sel .art{outline:2px solid var(--accent);outline-offset:4px;border-radius:6px;filter:drop-shadow(0 0 3px rgba(38,160,218,.9));}
  .obj.sel .face{outline:2px solid var(--accent);}
  .obj.sel .solid{filter:drop-shadow(0 0 2px rgba(38,160,218,.95)) drop-shadow(0 0 5px rgba(38,160,218,.5));}
  #gizAnchors{position:absolute;left:0;top:0;transform-style:preserve-3d;pointer-events:none;}
  #gizAnchors .ganc{position:absolute;left:0;top:0;width:1px;height:1px;}
  #gizmo{position:absolute;inset:0;pointer-events:none;z-index:7;display:none;}
  #gizmo>div{position:absolute;}
  #gizmo .giz{pointer-events:auto;transform:translate(-50%,-50%);z-index:2;}
  #gizmo .giz::before{content:"";position:absolute;inset:-8px;border-radius:5px;}
  .gh{width:11px;height:11px;background:#fff;border:1.5px solid var(--accent);border-radius:2px;box-shadow:0 1px 2px rgba(45,80,110,.35);}
  .ghb{width:11px;height:11px;background:#2b3a45;border:1.5px solid #16202b;border-radius:2px;box-shadow:0 1px 2px rgba(45,80,110,.35);cursor:move;}
  .ghtop{cursor:ns-resize;}
  .gharc{line-height:0;cursor:grab;filter:drop-shadow(0 1px 1.5px rgba(70,90,110,.45));}
  .gharc:active{cursor:grabbing;}
  .ghcorner{cursor:nwse-resize;} .ghedge{cursor:move;}
  .ghcone{line-height:0;cursor:ns-resize;filter:drop-shadow(0 1px 1px rgba(0,0,0,.3));}
  .ghrot{line-height:0;cursor:grab;filter:drop-shadow(0 1px 1px rgba(0,0,0,.25));}
  .ghrot:active{cursor:grabbing;}
  .ghorig{width:17px;height:17px;border:2px solid var(--accent);background:#fff;border-radius:50%;cursor:move;display:flex;align-items:center;justify-content:center;color:var(--accent);font-size:12px;box-shadow:0 1px 3px rgba(45,80,110,.3);}
  /* green position rulers + editable white measurement chips + cone stem */
  .gbar{height:4px;background:#3FB65A;border-radius:3px;transform-origin:0 50%;box-shadow:0 1px 2px rgba(0,0,0,.14);}
  .goring{width:15px;height:15px;border:2px solid #8795A0;background:#fff;border-radius:50%;transform:translate(-50%,-50%);box-shadow:0 1px 3px rgba(45,80,110,.28);}
  .gstem{width:2px;background:#2b3a45;border-radius:2px;transform:translateX(-50%);box-shadow:0 0 1px rgba(0,0,0,.25);}
  .gchip{position:absolute;transform:translate(-50%,-50%);pointer-events:auto;z-index:3;}
  .gchip .val{display:inline-block;min-width:20px;text-align:center;background:rgba(255,255,255,.82);-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px);border:1px solid rgba(210,218,226,.9);border-radius:6px;font:600 13px/1 ui-monospace,Menlo,Consolas,monospace;color:#2B3A45;padding:6px 10px;box-shadow:0 3px 8px rgba(45,80,110,.16);cursor:pointer;white-space:nowrap;user-select:none;-webkit-user-select:none;}
  .gchip .val:hover{border-color:var(--accent);color:var(--accent);}
  .gchip input{width:56px;text-align:center;border:1.5px solid var(--accent);border-radius:6px;background:#fff;font:600 13px/1 ui-monospace,Menlo,Consolas,monospace;color:var(--ink);padding:6px 4px;box-shadow:0 0 0 3px rgba(38,160,218,.15);outline:none;cursor:text;}
  /* dashed base outline + dimension lines (SVG overlay) */
  .gdim{position:absolute;left:0;top:0;pointer-events:none;overflow:visible;z-index:1;}
  .gdim .dmain{stroke:#2b3a45;stroke-width:1.3;fill:none;}
  .gdim .dext{stroke:#2b3a45;stroke-width:1;fill:none;opacity:.8;}
  .gdim .dbase{stroke:#33434e;stroke-width:1.1;fill:none;stroke-dasharray:4 3;opacity:.95;stroke-linecap:round;}
  .gdim .dcross{stroke:#3a4a55;stroke-width:1;fill:none;stroke-dasharray:3 4;opacity:.4;stroke-linecap:round;}
  /* rotation ring overlay (projected ellipse in the axis plane) */
  .gring{position:absolute;left:0;top:0;pointer-events:none;overflow:visible;z-index:1;}
  .gring .rband{fill:none;stroke:rgba(38,160,218,.24);stroke-width:15;stroke-linejoin:round;stroke-linecap:round;}
  .gring .rband.back{stroke:rgba(38,160,218,.10);}
  .gring .rguide{fill:none;stroke:rgba(38,160,218,.30);stroke-width:1;}
  .gring .rthin{fill:none;stroke:rgba(38,160,218,.6);stroke-width:1.2;}
  .gring .rthin.back{stroke:rgba(38,160,218,.22);}
  .gring .rtick{stroke:rgba(38,160,218,.6);stroke-width:1.4;stroke-linecap:round;}
  .gring .rtick.back{stroke:rgba(38,160,218,.22);}
  .gring .rref{stroke:#E8912E;stroke-width:1.6;}
  .gring .rhot{fill:none;stroke:#E5533B;stroke-width:6;stroke-linecap:round;}
  .gring .raxis{stroke:#3a4a55;stroke-width:1;fill:none;stroke-dasharray:3 4;opacity:.45;stroke-linecap:round;}
  .gangle{position:absolute;transform:translate(-50%,-50%);background:rgba(255,255,255,.86);-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px);border:1px solid rgba(210,218,226,.9);border-radius:7px;font:600 13px/1 ui-monospace,Menlo,Consolas,monospace;color:#2B3A45;padding:6px 9px;box-shadow:0 3px 8px rgba(45,80,110,.18);pointer-events:none;z-index:4;white-space:nowrap;}
  /* red "active" states while dragging a handle */
  .giz.hot.gh,.giz.hot.ghtop{background:#E5533B;border-color:#c23d29;}
  .giz.hot.ghb{background:#E5533B;border-color:#c23d29;}
  .ghcone.hot svg path{fill:#E5533B;}
  .gharc.hot svg{stroke:#E5533B;}
  .obj.dragging{cursor:grabbing;}
  .selo{position:absolute;inset:-7px;border:2px solid var(--accent);border-radius:8px;box-shadow:0 0 0 4px rgba(38,160,218,.13);pointer-events:none;}
  .selo i{position:absolute;width:9px;height:9px;background:#fff;border:1.7px solid var(--accent);border-radius:2px;}
  .selo i.a{left:-5px;top:-5px;}.selo i.b{right:-5px;top:-5px;}.selo i.c{left:-5px;bottom:-5px;}.selo i.d{right:-5px;bottom:-5px;}
  .dimlab{position:absolute;transform:translateX(-50%);background:var(--ink);color:#fff;font:600 11px/1 ui-monospace,Menlo,Consolas,monospace;padding:5px 8px;border-radius:7px;white-space:nowrap;pointer-events:none;box-shadow:0 6px 16px rgba(45,80,110,.30);z-index:9;}

  /* inspector */
  .inspector{position:absolute;top:16px;right:18px;width:242px;background:#fff;border:1px solid var(--line);border-radius:14px;box-shadow:0 14px 34px rgba(45,80,110,.16);padding:14px;z-index:8;}
  .insHead{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px;}
  .insHead b{font-weight:600;font-size:14px;}
  .insHead span{font-size:11px;color:var(--muted-2);}
  .seg{display:flex;gap:2px;background:var(--line-2);border-radius:9px;padding:3px;margin-bottom:14px;}
  .seg button{flex:1;height:30px;border:none;background:transparent;border-radius:7px;color:var(--muted);cursor:pointer;font-size:12.5px;font-weight:600;}
  .seg button.on{background:#fff;box-shadow:0 1px 2px rgba(45,80,110,.16);color:var(--ink);}
  .lab{font-size:11px;font-weight:600;letter-spacing:.06em;text-transform:uppercase;color:var(--muted-2);margin-bottom:8px;display:flex;justify-content:space-between;}
  .swatches{display:flex;flex-wrap:wrap;gap:7px;margin-bottom:14px;}
  .sw{width:24px;height:24px;border-radius:6px;border:1px solid rgba(0,0,0,.1);cursor:pointer;padding:0;}
  .sw.on{outline:2px solid var(--ink);outline-offset:2px;}
  .dims{display:flex;gap:8px;margin-bottom:6px;}
  .dims label{flex:1;font-size:10.5px;color:var(--muted-2);}
  .dims input{width:100%;margin-top:3px;border:1px solid var(--line);background:#fff;border-radius:7px;padding:6px 7px;font-size:13px;color:var(--ink);outline:none;}
  .dims input:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(38,160,218,.12);}
  .rotRow{display:flex;align-items:center;gap:6px;margin-bottom:6px;}
  .rotRow input{flex:1;border:1px solid var(--line);border-radius:7px;padding:6px 7px;font-size:13px;color:var(--ink);outline:none;}
  .rotRow input:focus{border-color:var(--accent);}
  .rbtn{width:32px;height:32px;flex:none;border:1px solid var(--line);background:#fff;border-radius:7px;color:var(--muted);cursor:pointer;display:inline-flex;align-items:center;justify-content:center;}
  .rbtn:hover{border-color:#BFE2F5;color:var(--accent);}
  .insRow{display:flex;gap:8px;margin-top:12px;}
  .insRow button{flex:1;padding:8px;border-radius:8px;font-size:12px;font-weight:600;cursor:pointer;}
  .insDup{border:1px solid var(--line);background:#fff;color:var(--ink-2);}
  .insDup:hover{background:var(--line-2);}
  .insDel{border:1px solid #F3D2CC;background:#FDF1EF;color:#D8503D;}
  .insDel:hover{background:#FBE3DE;}

  /* ---------- library ---------- */
  .lib{position:relative;width:320px;flex:none;background:var(--panel);border-left:1px solid var(--line);display:flex;flex-direction:column;z-index:10;}
  .libHandle{position:absolute;left:-15px;top:50%;transform:translateY(-50%);width:15px;height:48px;background:#fff;border:1px solid var(--line);border-right:none;border-radius:8px 0 0 8px;display:flex;align-items:center;justify-content:center;color:var(--faint);cursor:pointer;}
  .ptabs{display:flex;align-items:center;gap:18px;padding:14px 18px 0;}
  .ptab{width:30px;height:30px;border:none;background:transparent;cursor:pointer;color:var(--faint);display:inline-flex;align-items:center;justify-content:center;padding:0;position:relative;}
  .ptab.on{color:var(--accent);}
  .ptab.on::after{content:"";position:absolute;left:2px;right:2px;bottom:-12px;height:2.5px;border-radius:2px;background:var(--accent);}
  .libDivider{height:1px;background:var(--line-2);margin-top:11px;}
  .libTop{padding:14px 16px 12px;display:flex;gap:8px;align-items:center;}
  .ddl{position:relative;flex:1;}
  .ddl select{width:100%;border:1px solid var(--line);background:#fff;border-radius:9px;padding:10px 12px;font-size:14px;font-weight:600;color:var(--ink);cursor:pointer;outline:none;-webkit-appearance:none;appearance:none;}
  .ddl .car{position:absolute;right:11px;top:50%;transform:translateY(-50%);pointer-events:none;}
  .searchBtn{width:42px;height:42px;flex:none;border:1px solid var(--line);background:#fff;border-radius:9px;color:var(--muted);cursor:pointer;display:inline-flex;align-items:center;justify-content:center;}
  .searchBtn:hover,.searchBtn.on{border-color:#BFE2F5;color:var(--accent);background:var(--accent-l);}
  .searchWrap{padding:0 16px 8px;position:relative;}
  .searchWrap input{width:100%;border:1px solid var(--line);background:#F5F8FA;border-radius:9px;padding:9px 32px 9px 11px;font-size:13px;color:var(--ink);outline:none;}
  .searchWrap input:focus{border-color:var(--accent);background:#fff;}
  .searchClear{position:absolute;right:24px;top:50%;transform:translateY(-50%);border:none;background:transparent;color:var(--faint);cursor:pointer;font-size:16px;line-height:1;padding:4px;}
  .grid{flex:1;overflow-y:auto;padding:6px 12px 12px;}
  .grid::-webkit-scrollbar{width:11px;}
  .grid::-webkit-scrollbar-thumb{background:#DCE3EA;border-radius:11px;border:3px solid #fff;}
  .secLab{font-size:11px;font-weight:700;letter-spacing:.05em;text-transform:uppercase;color:var(--muted-2);margin:6px 4px 8px;display:flex;align-items:center;gap:6px;}
  .cards{display:grid;grid-template-columns:repeat(3,1fr);gap:5px;}
  .cards.favgrid{margin-bottom:14px;}
  .card{position:relative;display:flex;flex-direction:column;align-items:center;gap:8px;padding:13px 4px 10px;background:#fff;border:1px solid var(--line-2);border-radius:12px;cursor:pointer;transition:background .1s,border-color .1s,transform .06s;}
  .card:hover{background:#F4FAFE;border-color:#CDE9F8;}
  .card:active{transform:scale(.96);}
  .card span.nm{font-size:11px;font-weight:500;color:var(--muted);text-align:center;line-height:1.15;}
  .fav{position:absolute;top:6px;right:7px;display:inline-flex;cursor:pointer;line-height:0;padding:2px;}
  .noRes{padding:40px 16px;text-align:center;color:var(--muted-2);font-size:13px;line-height:1.5;}
  .libFoot{padding:12px 16px;border-top:1px solid var(--line-2);}
  .more{width:100%;padding:11px;border:none;background:var(--accent);color:#fff;border-radius:10px;font-size:13.5px;font-weight:600;cursor:pointer;box-shadow:inset 0 1px 0 rgba(255,255,255,.35);}
  .more:hover{background:var(--accent-d);}
  .panelHidden{display:none !important;}
  .rulerPane,.notesPane{flex:1;padding:18px;overflow-y:auto;}
  .rulerPane .box{border:1px dashed #C3CDD5;border-radius:12px;padding:22px 18px;text-align:center;color:var(--muted-2);font-size:13px;line-height:1.55;}
  .measCard{margin-top:14px;border:1px solid var(--line);border-radius:12px;padding:14px;}
  .measCard .h{font-size:11px;font-weight:700;letter-spacing:.05em;text-transform:uppercase;color:var(--muted-2);margin-bottom:10px;}
  .measRow{display:flex;align-items:center;justify-content:space-between;font-size:13px;padding:5px 0;border-bottom:1px solid var(--line-2);}
  .measRow:last-child{border-bottom:none;}
  .measRow b{font-family:ui-monospace,Menlo,Consolas,monospace;color:var(--ink);}
  .notesPane{display:flex;flex-direction:column;}
  .notesPane textarea{flex:1;width:100%;border:1px solid var(--line);background:#F5F8FA;border-radius:11px;padding:12px;font-size:13.5px;line-height:1.5;color:var(--ink);resize:none;outline:none;}

  /* ---------- modal ---------- */
  .overlay{position:fixed;inset:0;background:rgba(43,58,69,.42);backdrop-filter:blur(3px);display:none;align-items:center;justify-content:center;z-index:100;}
  .overlay.on{display:flex;}
  .modal{width:560px;max-width:92vw;max-height:88vh;overflow:hidden;background:#F4F7F9;border-radius:18px;box-shadow:0 32px 64px rgba(45,80,110,.3);display:flex;flex-direction:column;}
  .mtabs{position:relative;display:flex;align-items:center;justify-content:center;gap:30px;padding:18px 20px 0;background:#fff;}
  .mtab{position:relative;background:transparent;border:none;font-size:16px;font-weight:600;cursor:pointer;padding-bottom:14px;color:var(--muted-2);}
  .mtab.on{color:var(--ink);}
  .mtab .ln{position:absolute;left:0;right:0;bottom:0;height:3px;background:var(--accent);border-radius:3px;display:none;}
  .mtab.on .ln{display:block;}
  .mclose{position:absolute;top:14px;right:16px;width:32px;height:32px;border:none;background:transparent;border-radius:8px;color:var(--muted-2);cursor:pointer;font-size:20px;line-height:1;}
  .mclose:hover{background:var(--line-2);}
  .mbody{padding:22px 26px;overflow-y:auto;}
  .inc{display:flex;gap:18px;margin-bottom:18px;align-items:flex-start;}
  .inc>span{font-size:13px;font-weight:600;color:var(--muted);padding-top:2px;}
  .incOpts{display:flex;flex-direction:column;gap:10px;}
  .incOpt{display:flex;align-items:center;gap:9px;background:transparent;border:none;cursor:pointer;font-size:14px;color:var(--ink);text-align:left;}
  .radio{width:18px;height:18px;border-radius:50%;border:2px solid #C3CDD5;display:inline-flex;align-items:center;justify-content:center;}
  .radio i{width:9px;height:9px;border-radius:50%;background:#46A85E;display:none;}
  .incOpt.on .radio i{display:block;}
  .mcard{background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px;margin-bottom:14px;}
  .mcard .h{font-size:13px;font-weight:600;color:var(--ink);margin-bottom:14px;}
  .fmtGrid{display:grid;grid-template-columns:1fr 1fr;gap:10px;}
  .fmt{padding:14px;border:1px solid var(--line);background:#fff;border-radius:10px;font-size:15px;font-weight:600;color:var(--ink-2);cursor:pointer;}
  .fmt:hover{border-color:var(--accent);background:var(--accent-l);}
  .svc{display:flex;align-items:center;gap:11px;padding:14px;border:1px solid var(--line);background:#fff;border-radius:10px;cursor:pointer;text-align:left;}
  .svc:hover{border-color:var(--accent);background:var(--accent-l);}
  .svc span{font-size:13.5px;font-weight:600;color:var(--ink-2);}

  /* ---------- toast ---------- */
  .toast{position:fixed;left:50%;bottom:42px;transform:translateX(-50%);background:var(--ink);color:#fff;padding:12px 20px;border-radius:12px;font-size:13.5px;font-weight:500;box-shadow:0 12px 30px rgba(45,80,110,.32);z-index:200;display:none;}
  .toast.on{display:block;animation:tup .32s cubic-bezier(.34,1.56,.64,1);}
  @keyframes tup{from{opacity:0;transform:translate(-50%,12px);}to{opacity:1;transform:translate(-50%,0);}}

  @media(max-width:1080px){ .lib{width:280px;} }
  @media(max-width:880px){ .proj{width:150px;} .lib{width:248px;} .wmPlane{font-size:60px;} }

/* ===== real WebGL viewport (Three.js) ===== */
#viewport{position:absolute;inset:0;z-index:1;}
/* the camera column has no z-index in the mock (it relied on paint order);
   raise it above the canvas so its buttons stay clickable */
.camcol{z-index:6;}
#viewport canvas{display:block;width:100%;height:100%;touch-action:none;}
.stage{cursor:default;}
.inspector .txtField{margin-bottom:8px;}
.inspector .txtField input{width:100%;border:1px solid var(--line);border-radius:7px;padding:7px 8px;font-size:13px;color:var(--ink);outline:none;}
.inspector .txtField input:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(38,160,218,.12);}
.posRow{display:flex;gap:8px;margin-bottom:6px;}
.posRow label{flex:1;font-size:10.5px;color:var(--muted-2);}
.posRow input{width:100%;margin-top:3px;border:1px solid var(--line);border-radius:7px;padding:6px 7px;font-size:13px;color:var(--ink);outline:none;}
.posRow input:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(38,160,218,.12);}