:root {
  --cad-bg:#0b0f14;
  --cad-panel:#111820;
  --cad-panel-2:#151e28;
  --cad-line:#263442;
  --cad-line-soft:#1d2934;
  --cad-text:#d9e6ef;
  --cad-muted:#7f93a4;
  --cad-accent:#4bd5ff;
  --cad-accent-2:#97ecff;
  --cad-danger:#ff6374;
}
.cad-body{background:#080c11;color:var(--cad-text);min-height:100vh;overflow-x:hidden}
.cad-body .site-shell-header{position:relative;z-index:20}
.cad-page{width:min(1800px,calc(100% - 28px));margin:18px auto 36px;background:var(--cad-bg);border:1px solid #1e2b37;box-shadow:0 24px 80px rgba(0,0,0,.42);border-radius:16px;overflow:hidden;min-height:780px;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}
.cad-titlebar{min-height:66px;display:flex;align-items:center;justify-content:space-between;gap:18px;padding:10px 16px;border-bottom:1px solid var(--cad-line);background:linear-gradient(180deg,#18232d,#111922)}
.cad-titlebar>div:first-child{display:flex;align-items:center;gap:12px}.cad-titlebar h1{font-size:18px;line-height:1.1;margin:0;color:#f3fbff}.cad-titlebar p{margin:5px 0 0;font-size:11px;letter-spacing:.05em;color:var(--cad-muted)}
.cad-appmark{display:grid;place-items:center;width:40px;height:40px;border-radius:8px;border:1px solid rgba(75,213,255,.45);background:linear-gradient(145deg,rgba(75,213,255,.24),rgba(75,213,255,.05));color:var(--cad-accent-2);font-weight:800;font-size:12px;letter-spacing:.08em;box-shadow:inset 0 0 18px rgba(75,213,255,.08)}
.cad-title-actions{display:flex;gap:7px;flex-wrap:wrap;justify-content:flex-end}
.cad-btn,.cad-tool{border:1px solid #314252;color:#d8e7f0;background:#19242e;border-radius:7px;font:inherit;cursor:pointer;transition:.15s ease}.cad-btn{padding:8px 11px;font-size:12px}.cad-btn:hover,.cad-tool:hover{border-color:#4f7389;background:#21313e;color:#fff}.cad-file-label{display:inline-flex;align-items:center}
.cad-toolbar{display:flex;align-items:stretch;gap:0;background:#101820;border-bottom:1px solid var(--cad-line);overflow-x:auto;scrollbar-width:thin}.cad-tool-group{display:flex;align-items:center;gap:5px;padding:8px 10px;border-right:1px solid var(--cad-line-soft);flex:0 0 auto}.cad-tool-label{font-size:9px;letter-spacing:.13em;color:#668091;text-transform:uppercase;margin-right:3px}.cad-tool{min-height:34px;padding:5px 9px;font-size:11px;display:inline-flex;gap:5px;align-items:center;justify-content:center}.cad-tool>span{font-size:14px;color:#9bb1c0}.cad-tool.is-active{background:rgba(75,213,255,.13);border-color:rgba(75,213,255,.55);color:var(--cad-accent-2);box-shadow:inset 0 0 0 1px rgba(75,213,255,.06)}.cad-tool.cad-danger:hover{color:#fff;border-color:rgba(255,99,116,.6);background:rgba(255,99,116,.14)}
.cad-snap-group{margin-left:auto}.cad-toggle{display:flex;align-items:center;gap:7px;font-size:11px;color:#a9bbc7;cursor:pointer;white-space:nowrap}.cad-toggle input{position:absolute;opacity:0}.cad-toggle span{width:28px;height:15px;border-radius:999px;background:#283540;position:relative;border:1px solid #384957}.cad-toggle span:after{content:"";position:absolute;width:9px;height:9px;border-radius:50%;left:2px;top:2px;background:#778a98;transition:.18s}.cad-toggle input:checked+span{background:rgba(75,213,255,.15);border-color:rgba(75,213,255,.5)}.cad-toggle input:checked+span:after{left:15px;background:var(--cad-accent)}
.cad-workbench{display:grid;grid-template-columns:220px minmax(0,1fr) 270px;height:min(72vh,850px);min-height:580px}.cad-panel{background:var(--cad-panel);min-width:0;display:flex;flex-direction:column}.cad-panel-left{border-right:1px solid var(--cad-line)}.cad-panel-right{border-left:1px solid var(--cad-line)}.cad-panel-heading{height:38px;display:flex;align-items:center;justify-content:space-between;padding:0 12px;border-bottom:1px solid var(--cad-line-soft);font-size:10px;letter-spacing:.13em;color:#8ba0ae}.cad-panel-heading small{display:grid;place-items:center;min-width:20px;height:20px;border-radius:10px;background:#1e2a34;color:#9cb1bf}
.cad-tree{padding:7px;overflow:auto;flex:1}.cad-tree-empty{padding:24px 12px;text-align:center;color:#637785;font-size:12px}.cad-tree-item{width:100%;display:grid;grid-template-columns:21px 1fr auto;align-items:center;gap:7px;padding:7px 8px;border:1px solid transparent;background:transparent;color:#b9cad5;border-radius:6px;text-align:left;cursor:pointer;font:inherit;font-size:11px}.cad-tree-item:hover{background:#18232d}.cad-tree-item.active{border-color:rgba(75,213,255,.36);background:rgba(75,213,255,.09);color:#eafdff}.cad-tree-icon{color:var(--cad-accent);font-size:10px}.cad-tree-type{font-size:9px;color:#607789;text-transform:uppercase;letter-spacing:.08em}
.cad-help{border-top:1px solid var(--cad-line-soft);padding:12px;color:#6f8493;font-size:10px;line-height:1.55}.cad-help strong{color:#9eb0bd;font-size:10px;letter-spacing:.08em}.cad-help p{margin:7px 0}.cad-help kbd{border:1px solid #344654;background:#1b2630;border-radius:4px;padding:1px 4px;color:#c9dae4;font-family:inherit;font-size:9px}
.cad-viewport-wrap{position:relative;min-width:0;min-height:0;background:#0a0f14;overflow:hidden}.cad-viewport{position:absolute;inset:0;outline:none}.cad-viewport canvas{display:block;width:100%;height:100%}.cad-view-badge{position:absolute;z-index:5;left:12px;top:10px;padding:5px 8px;border:1px solid rgba(84,110,129,.45);border-radius:4px;background:rgba(8,12,16,.68);backdrop-filter:blur(7px);font-size:9px;letter-spacing:.13em;color:#7e95a5;pointer-events:none}.cad-crosshair{position:absolute;z-index:4;left:50%;top:50%;width:20px;height:20px;opacity:.18;pointer-events:none}.cad-crosshair i,.cad-crosshair b{position:absolute;background:#d5f6ff}.cad-crosshair i{width:20px;height:1px;top:10px}.cad-crosshair b{width:1px;height:20px;left:10px}.cad-axis-cube{position:absolute;z-index:5;right:12px;top:12px;width:54px;height:54px;border:1px solid rgba(78,105,123,.45);border-radius:8px;background:rgba(8,12,16,.55);pointer-events:none}.cad-axis-cube span{position:absolute;font-size:10px;font-weight:700}.cad-axis-cube .x{right:6px;bottom:8px;color:#ff7c87}.cad-axis-cube .y{left:7px;top:7px;color:#89ffb3}.cad-axis-cube .z{left:9px;bottom:7px;color:#7faaff}
.cad-loading{position:absolute;z-index:10;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:9px;background:radial-gradient(circle at center,#121c24,#090d12 65%);color:#bdd0db;text-align:center}.cad-loading.hidden{display:none}.cad-loading strong{font-size:13px}.cad-loading small{color:#61798a;font-size:10px}.cad-loader{width:30px;height:30px;border-radius:50%;border:2px solid #213441;border-top-color:var(--cad-accent);animation:cadspin .8s linear infinite}@keyframes cadspin{to{transform:rotate(360deg)}}
.cad-properties{padding:12px;overflow:auto}.cad-properties-empty{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;color:#6c8190}.cad-properties-empty strong{color:#9fb2be;font-size:12px}.cad-properties-empty p{max-width:190px;font-size:10px;line-height:1.5}.cad-empty-icon{font-size:28px;color:#3f596a;margin-bottom:8px}.cad-prop-head{margin-bottom:13px}.cad-prop-head input{width:100%;box-sizing:border-box;background:#18232d;border:1px solid #2d3d49;border-radius:6px;padding:8px 9px;color:#e0edf4;font-size:12px}.cad-prop-section{border-top:1px solid var(--cad-line-soft);padding-top:10px;margin-top:10px}.cad-prop-section h3{margin:0 0 8px;font-size:9px;color:#7e94a3;letter-spacing:.12em;text-transform:uppercase}.cad-prop-grid{display:grid;grid-template-columns:16px repeat(3,minmax(0,1fr));gap:5px;align-items:center}.cad-prop-grid+.cad-prop-grid{margin-top:6px}.cad-prop-grid>span{font-size:9px;color:#718797}.cad-prop-grid label{min-width:0}.cad-prop-grid label small{display:block;font-size:8px;color:#516876;margin-bottom:2px}.cad-prop-grid input{width:100%;box-sizing:border-box;background:#0e151b;border:1px solid #293943;border-radius:4px;padding:5px 4px;color:#c8dae5;font-size:10px}.cad-prop-grid input:focus{outline:none;border-color:rgba(75,213,255,.65)}.cad-meta{display:grid;grid-template-columns:1fr auto;gap:5px 8px;font-size:10px;color:#738a99}.cad-meta strong{color:#b4c5cf;font-weight:600}
.cad-statusbar{height:28px;display:flex;align-items:center;gap:20px;padding:0 11px;background:#0f171e;border-top:1px solid var(--cad-line);font-size:9px;letter-spacing:.08em;color:#607786}.cad-statusbar span:first-child{margin-right:auto;color:#90a5b3}
@media (max-width:1050px){.cad-page{width:calc(100% - 14px);margin-top:8px}.cad-workbench{grid-template-columns:180px minmax(0,1fr) 220px}.cad-tool-label{display:none}}
@media (max-width:780px){.cad-titlebar{align-items:flex-start}.cad-titlebar p{display:none}.cad-title-actions{gap:4px}.cad-btn{padding:7px 8px;font-size:10px}.cad-workbench{grid-template-columns:1fr;height:68vh;min-height:520px}.cad-panel-left,.cad-panel-right{display:none}.cad-toolbar{overscroll-behavior-x:contain}.cad-tool{padding:5px 8px}.cad-statusbar span:nth-child(3),.cad-statusbar span:nth-child(4){display:none}}

.cad-statusbar #cad-sim-state{color:#97ecff}
.cad-tool-group .cad-tool[id^='cad-sim-'], .cad-tool-group .cad-tool#cad-demo-reset{background:#142330}

/* V3 · Rapier 3D physics integration */
.cad-titlebar>div:first-child{flex-wrap:wrap}
.cad-engine-badge{display:inline-flex;align-items:center;height:24px;padding:0 8px;margin-left:2px;border:1px solid rgba(75,213,255,.42);border-radius:999px;background:rgba(75,213,255,.08);color:#97ecff;font-size:8px;font-weight:800;letter-spacing:.13em;box-shadow:0 0 18px rgba(75,213,255,.08)}
.cad-statusbar #cad-sim-state{color:#97ecff;font-weight:700}
@media(max-width:780px){.cad-engine-badge{display:none}}

/* V4 · Rapier loader diagnostics */
.cad-loading.cad-loading-error{background:radial-gradient(circle at center,#28151a,#090d12 68%);padding:24px}
.cad-loading.cad-loading-error .cad-loader{display:none}
.cad-loading.cad-loading-error strong{color:#ffb5bd;font-size:14px}
.cad-loading.cad-loading-error small{max-width:640px;line-height:1.6;color:#c9979e}
.cad-loading.cad-loading-error code{display:inline-block;margin-top:8px;padding:4px 7px;border:1px solid rgba(255,99,116,.28);border-radius:5px;background:#160c10;color:#ffced4;word-break:break-word}



/* V6 · Lightweight custom pyramid builder */
.cad-pyramid-group{gap:7px}
.cad-size-control{display:flex;align-items:center;gap:6px;padding:0 3px;color:#8da4b3;font-size:9px;letter-spacing:.06em;white-space:nowrap}
.cad-size-control input{width:46px;height:31px;box-sizing:border-box;border:1px solid #314252;border-radius:6px;background:#0e151b;color:#dff8ff;text-align:center;font:600 11px/1 Inter,ui-sans-serif,system-ui;outline:none}
.cad-size-control input:focus{border-color:rgba(75,213,255,.72);box-shadow:0 0 0 2px rgba(75,213,255,.08)}
.cad-pyramid-build{border-color:rgba(75,213,255,.48);background:linear-gradient(180deg,rgba(75,213,255,.13),rgba(20,35,48,.96))}
.cad-pyramid-build>span{color:#c9f7ff}
@media(max-width:900px){.cad-size-control>span{display:none}.cad-size-control input{width:42px}}

#cad-catapult-demo{background:linear-gradient(180deg,#17354c,#102638);color:#dff8ff;border-color:rgba(120,220,255,.32)}
#cad-catapult-demo:hover{box-shadow:0 0 0 1px rgba(120,220,255,.36) inset,0 10px 22px rgba(0,0,0,.26)}

.cad-size-control small{font-size:9px;color:#6f8797;margin-left:-3px}

#cad-trigger-mass{min-width:58px}


/* V16 · cleaner pyramid-level stepper + compact toolbar inputs */
.cad-level-control{
  gap:8px;
  padding:0 2px;
}
.cad-level-label{
  font-size:9px;
  letter-spacing:.08em;
  color:#8da4b3;
  text-transform:uppercase;
}
.cad-number-stepper{
  display:grid;
  grid-template-columns:28px 42px 28px;
  height:32px;
  overflow:hidden;
  border:1px solid #314252;
  border-radius:7px;
  background:#0e151b;
  box-shadow:inset 0 1px 0 rgba(255,255,255,.025);
}
.cad-number-stepper:focus-within{
  border-color:rgba(75,213,255,.72);
  box-shadow:0 0 0 2px rgba(75,213,255,.08),inset 0 1px 0 rgba(255,255,255,.025);
}
.cad-number-stepper #cad-pyramid-size{
  width:42px;
  min-width:0;
  height:30px;
  padding:0;
  border:0;
  border-left:1px solid #263744;
  border-right:1px solid #263744;
  border-radius:0;
  background:#101a22;
  color:#e8fbff;
  text-align:center;
  font:700 12px/30px Inter,ui-sans-serif,system-ui;
  appearance:textfield;
  -moz-appearance:textfield;
}
.cad-number-stepper #cad-pyramid-size:focus{outline:none;box-shadow:none;border-color:#263744}
.cad-number-stepper #cad-pyramid-size::-webkit-inner-spin-button,
.cad-number-stepper #cad-pyramid-size::-webkit-outer-spin-button{-webkit-appearance:none;margin:0}
.cad-step-btn{
  width:28px;
  height:30px;
  padding:0;
  border:0;
  background:#17242e;
  color:#a9dcec;
  font:700 17px/30px Inter,ui-sans-serif,system-ui;
  cursor:pointer;
  transition:background .15s ease,color .15s ease;
}
.cad-step-btn:hover{background:#203746;color:#e8fbff}
.cad-step-btn:active{background:#29485b}
@media(max-width:900px){
  .cad-level-label{display:none}
  .cad-level-control{padding-inline:0}
}

@media(max-width:1180px){
}

/* V22 · Galaxy Tab / tablet layout
   Keep the 3D viewport large instead of squeezing it between both sidebars. */
@media (min-width:781px) and (max-width:1180px){
  .cad-page{
    width:calc(100% - 16px);
    margin:8px auto 24px;
    min-height:0;
  }

  .cad-titlebar{
    min-height:58px;
    padding:9px 12px;
    gap:10px;
  }
  .cad-titlebar h1{font-size:16px}
  .cad-titlebar p{
    max-width:520px;
    font-size:10px;
    white-space:nowrap;
    overflow:hidden;
    text-overflow:ellipsis;
  }
  .cad-title-actions{flex-wrap:nowrap}
  .cad-btn{padding:7px 9px;font-size:10px}

  .cad-toolbar{
    overflow-x:auto;
    overflow-y:hidden;
    -webkit-overflow-scrolling:touch;
    scrollbar-width:thin;
  }
  .cad-tool-group{padding:7px 8px;gap:4px}
  .cad-tool{min-height:32px;padding:5px 7px;font-size:10px}
  .cad-tool>span{font-size:13px}
  

  .cad-workbench{
    display:grid;
    grid-template-columns:minmax(0,1fr) minmax(0,1fr);
    grid-template-areas:
      "viewport viewport"
      "model properties";
    height:auto;
    min-height:0;
  }

  .cad-viewport-wrap{
    grid-area:viewport;
    height:clamp(480px,62vh,680px);
    min-height:480px;
    border-bottom:1px solid var(--cad-line);
  }

  .cad-panel-left{
    grid-area:model;
    height:260px;
    border-right:1px solid var(--cad-line);
    border-top:0;
  }

  .cad-panel-right{
    grid-area:properties;
    height:260px;
    border-left:0;
    border-top:0;
  }

  .cad-tree,.cad-properties{overscroll-behavior:contain}
  .cad-help{
    max-height:112px;
    overflow:auto;
    padding:9px 11px;
  }
  .cad-help p{margin:5px 0}

  .cad-axis-cube{
    width:48px;
    height:48px;
    right:10px;
    top:10px;
  }
  .cad-view-badge{left:10px;top:9px}

  .cad-statusbar{
    gap:12px;
    white-space:nowrap;
    overflow:hidden;
  }
}

/* Narrow portrait tablets: preserve almost the same large viewport,
   then stack panels vertically so neither one becomes cramped. */
@media (min-width:781px) and (max-width:860px){
  .cad-titlebar p{display:none}
  .cad-workbench{
    grid-template-columns:1fr;
    grid-template-areas:
      "viewport"
      "model"
      "properties";
  }
  .cad-viewport-wrap{
    height:clamp(500px,64vh,700px);
    min-height:500px;
  }
  .cad-panel-left,.cad-panel-right{
    height:220px;
    border-left:0;
    border-right:0;
    border-top:1px solid var(--cad-line);
  }
  .cad-help{display:none}
  
}