:root{
  --bg:#071016;
  --panel:#101b24;
  --panel-2:#142432;
  --card:#0d1821;
  --line:rgba(255,255,255,.10);
  --text:#eef7ff;
  --muted:#8fa3b4;
  --accent:#ff9f1c;
  --accent-2:#2ec4b6;
  --danger:#ff5f66;
  --shadow:0 20px 60px rgba(0,0,0,.35);
  --radius:18px;
  --radius-sm:12px;
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family:Inter,Segoe UI,Roboto,Arial,sans-serif;
  color:var(--text);
  background:
    radial-gradient(circle at 20% 10%, rgba(46,196,182,.16), transparent 30%),
    radial-gradient(circle at 82% 0%, rgba(255,159,28,.14), transparent 28%),
    var(--bg);
  overflow:hidden;
}
button,input,select,textarea{font:inherit}
button,label.plain-file{
  border:1px solid var(--line);
  color:var(--text);
  background:linear-gradient(180deg, rgba(255,255,255,.08), rgba(255,255,255,.03));
  border-radius:10px;
  padding:9px 11px;
  cursor:pointer;
  transition:transform .18s ease,border-color .18s ease,background .18s ease,box-shadow .18s ease;
}
button:hover,label.plain-file:hover{transform:translateY(-1px);border-color:rgba(46,196,182,.55);box-shadow:0 8px 20px rgba(0,0,0,.22)}
button:active{transform:translateY(0)}
button.active,.primary{background:linear-gradient(135deg,var(--accent),#ffbc58);color:#211404;border-color:transparent;font-weight:800}
button.primary:hover{border-color:transparent;box-shadow:0 12px 30px rgba(255,159,28,.24)}

.app{
  display:grid;
  grid-template-columns:minmax(280px,320px) minmax(440px,1fr) minmax(310px,370px);
  gap:14px;
  height:100dvh;
  padding:14px;
}
.panel,.workspace{min-height:0}
.panel{
  background:rgba(16,27,36,.86);
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
  overflow:auto;
  backdrop-filter:blur(14px);
}
.panel-left,.panel-right{padding:14px;display:flex;flex-direction:column;gap:12px}
.workspace{display:grid;grid-template-rows:auto minmax(0,1fr) auto;gap:12px}

.brand{display:flex;align-items:center;gap:12px;padding:4px 4px 10px}
.brand-mark{
  width:48px;height:48px;border-radius:15px;
  display:grid;place-items:center;
  background:linear-gradient(135deg,var(--accent),var(--accent-2));
  color:#061116;font-weight:900;font-size:20px;letter-spacing:-1px;
  box-shadow:0 12px 30px rgba(46,196,182,.18);
}
h1,h2,p{margin:0}
h1{font-size:20px;letter-spacing:-.03em}
h2{font-size:14px;text-transform:uppercase;letter-spacing:.08em;color:#d9edf8}
.brand p,.hint{color:var(--muted);font-size:12px;margin-top:3px}
.card{
  background:linear-gradient(180deg,rgba(255,255,255,.055),rgba(255,255,255,.025));
  border:1px solid var(--line);
  border-radius:var(--radius-sm);
  padding:12px;
}
.section-title{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:10px}
.section-title span{font-size:12px;color:var(--muted)}

.tool-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}
.tool-btn{
  min-height:58px;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;
  font-size:20px;
  padding:8px 4px;
  user-select:none;
}
.tool-btn span{font-size:11px;color:inherit;opacity:.95}
.import-btn{margin:0;text-align:center}
.import-btn.active{background:linear-gradient(135deg,var(--accent),#ffbc58);color:#211404;border-color:transparent;font-weight:800}

.tree-actions{display:grid;grid-template-columns:1fr 1fr 1fr 42px 42px;gap:6px;margin-bottom:8px}
.tree-actions button,.mini-btn{font-size:12px;padding:7px 8px}
.object-tree{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:6px;max-height:270px;overflow:auto}
.object-tree li{
  display:grid;
  grid-template-columns:22px 1fr auto;
  gap:8px;
  align-items:center;
  min-height:34px;
  padding:7px 8px;
  border:1px solid var(--line);
  background:rgba(0,0,0,.14);
  border-radius:10px;
  cursor:pointer;
}
.object-tree li.selected{border-color:var(--accent);background:rgba(255,159,28,.12)}
.object-tree li.hidden{opacity:.45}
.obj-type{width:20px;height:20px;display:grid;place-items:center;border-radius:7px;background:rgba(46,196,182,.15);font-size:12px;color:var(--accent-2)}
.obj-name{overflow:hidden;white-space:nowrap;text-overflow:ellipsis;font-size:13px}
.obj-meta{font-size:11px;color:var(--muted)}

.form-grid{display:grid;gap:9px}
.form-grid.small{grid-template-columns:repeat(2,minmax(0,1fr))}
label,.field-label{display:flex;flex-direction:column;gap:5px;font-size:12px;color:var(--muted)}
input,select,textarea{
  width:100%;
  border:1px solid var(--line);
  border-radius:10px;
  background:#08121a;
  color:var(--text);
  padding:9px 10px;
  outline:none;
}
input:focus,select:focus,textarea:focus{border-color:rgba(46,196,182,.65);box-shadow:0 0 0 3px rgba(46,196,182,.10)}
.full-btn{width:100%;margin-top:10px}

.topbar{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:10px;
  background:rgba(16,27,36,.86);
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
  backdrop-filter:blur(14px);
}
.view-switch,.top-actions,.button-row{display:flex;gap:8px;flex-wrap:wrap;align-items:center}
.view-switch button{font-weight:800}
.plain-file{display:inline-flex;align-items:center;justify-content:center;min-height:38px;font-size:13px}

.canvas-card{
  position:relative;
  min-height:0;
  overflow:hidden;
  background:rgba(8,18,26,.92);
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
}
.canvas-hud{
  position:absolute;
  left:14px;right:14px;top:12px;
  display:flex;justify-content:space-between;gap:10px;z-index:2;
  pointer-events:none;
}
.canvas-hud span{
  background:rgba(0,0,0,.35);
  border:1px solid rgba(255,255,255,.08);
  border-radius:999px;
  padding:7px 10px;
  color:#d9edf8;
  font-size:12px;
  backdrop-filter:blur(12px);
}
#mainCanvas{display:block;width:100%;height:100%;cursor:crosshair;touch-action:none}

.transform-bar{
  display:flex;align-items:flex-end;gap:8px;flex-wrap:wrap;
  padding:10px;
  background:rgba(16,27,36,.86);
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
}
.transform-bar strong{align-self:center;margin-right:5px;font-size:13px;color:#d9edf8;text-transform:uppercase;letter-spacing:.06em}
.transform-bar label{width:86px}
.transform-bar button{align-self:end}

.preview-card canvas{
  width:100%;height:auto;display:block;
  border:1px solid var(--line);
  border-radius:12px;
  background:#071016;
}
.output-card{min-height:260px;display:flex;flex-direction:column}
#gcodeOutput{height:320px;min-height:220px;resize:vertical;font-family:"Cascadia Code",Consolas,monospace;font-size:12px;line-height:1.45;white-space:pre}

@media (max-width:1180px){
  body{overflow:auto}
  .app{height:auto;min-height:100dvh;grid-template-columns:290px 1fr;grid-template-areas:"left main" "right right"}
  .panel-left{grid-area:left}.workspace{grid-area:main;min-height:72dvh}.panel-right{grid-area:right;display:grid;grid-template-columns:1fr 1fr;align-items:start}.output-card{grid-column:1/-1}
}
@media (max-width:760px){
  .app{display:flex;flex-direction:column;padding:8px;gap:10px}
  .panel{border-radius:14px}.panel-left,.panel-right{padding:10px}
  .workspace{min-height:78dvh;grid-template-rows:auto 65dvh auto}
  .topbar{align-items:stretch;flex-direction:column;border-radius:14px}.view-switch button,.top-actions button,.plain-file{flex:1}
  .tool-grid{grid-template-columns:repeat(3,1fr)}
  .panel-right{display:flex;flex-direction:column}
  .form-grid.small{grid-template-columns:1fr 1fr}
  .transform-bar{align-items:stretch}.transform-bar label{width:calc(50% - 6px)}.transform-bar button{flex:1}
  .canvas-hud{top:8px;left:8px;right:8px;flex-wrap:wrap}.canvas-hud span{font-size:11px;padding:6px 8px}
}
@media (max-width:430px){
  .tool-grid{grid-template-columns:repeat(2,1fr)}
  .form-grid.small{grid-template-columns:1fr}
  .tree-actions{grid-template-columns:1fr 1fr}
  .transform-bar label{width:100%}
}