.builder-shell{height:calc(100vh - 76px); display:grid; grid-template-columns:260px 1fr 320px;}
.panel-col{background:var(--panel); border-right:1px solid var(--line); overflow-y:auto; padding:20px;}
.panel-col.right{border-right:none; border-left:1px solid var(--line);}
.panel-title{font-family:'IBM Plex Mono',monospace; font-size:11px; letter-spacing:.08em; color:var(--muted); text-transform:uppercase; margin:22px 0 12px;}
.panel-title:first-child{margin-top:0;}
.comp-item{
  display:flex; align-items:center; gap:10px; padding:10px 12px; border-radius:4px;
  font-size:13.5px; color:var(--cream); cursor:pointer; border:1px solid transparent;
}
.comp-item:hover{background:var(--panel-2); border-color:var(--line);}
.comp-item .ico{width:18px; height:18px; border-radius:3px; background:var(--oak-dim); flex-shrink:0;}
.select-field{width:100%; margin-bottom:14px;}
.select-field label{display:block; font-size:12px; color:var(--muted); margin-bottom:6px;}
.select-field select, .select-field input{
  width:100%; background:var(--panel-2); border:1px solid var(--line); color:var(--cream);
  padding:9px 10px; border-radius:4px; font-size:13px; font-family:inherit;
}

.canvas-area{position:relative; display:flex; flex-direction:column; background:#100E0B;}
.canvas-toolbar{
  display:flex; justify-content:space-between; align-items:center; padding:14px 22px;
  border-bottom:1px solid var(--line); font-family:'IBM Plex Mono',monospace; font-size:12px; color:var(--muted);
}
.view-toggle{display:flex; gap:6px; background:var(--panel-2); border-radius:4px; padding:3px;}
.view-toggle button{background:none; border:none; color:var(--muted); font-size:12px; padding:6px 12px; border-radius:3px; cursor:pointer; font-family:'IBM Plex Mono',monospace;}
.view-toggle button.active{background:var(--oak); color:#1A1512;}
.canvas-stage{flex:1; display:flex; align-items:center; justify-content:center; position:relative;}
.closet-render{
  width:78%; aspect-ratio:16/10; background:linear-gradient(180deg,#221D18,#161210);
  border:1px solid var(--line); border-radius:4px; position:relative; overflow:hidden;
  display:grid; grid-template-columns:repeat(4,1fr);
}
.closet-render .bay{border-right:1px solid var(--line); position:relative;}
.closet-render .bay:last-child{border-right:none;}
.closet-render .rail{position:absolute; top:16%; left:10%; right:10%; height:2px; background:#4A4038;}
.closet-render .hang{position:absolute; top:19%; width:14px; height:26px; border-bottom:2px solid #6b6055; border-radius:0 0 3px 3px;}
.closet-render .shelf{position:absolute; left:6%; right:6%; height:2px; background:#4A4038;}
.closet-render .drawer{position:absolute; left:8%; right:8%; height:16%; background:#2B241C; border:1px solid #3A322A; border-radius:2px; display:flex; align-items:center; justify-content:center;}
.closet-render .drawer::after{content:''; width:24px; height:2px; background:#59493A;}
.drop-hint{position:absolute; bottom:10px; left:50%; transform:translateX(-50%); font-family:'IBM Plex Mono',monospace; font-size:10.5px; color:var(--muted); background:rgba(20,18,15,.7); padding:5px 10px; border-radius:3px;}

.summary-block{background:var(--panel-2); border:1px solid var(--line); border-radius:5px; padding:16px; margin-bottom:16px;}
.summary-row{display:flex; justify-content:space-between; font-size:13px; padding:7px 0; border-bottom:1px solid var(--line); color:var(--muted);}
.summary-row:last-child{border:none;}
.summary-row.total{color:var(--cream); font-weight:600; font-size:15px;}
.summary-row.total b{color:var(--oak);}

.ai-chat{display:flex; flex-direction:column; height:100%;}
.ai-messages{flex:1; overflow-y:auto; margin-bottom:12px;}
.ai-bubble{max-width:92%; padding:10px 12px; border-radius:7px; font-size:13px; line-height:1.5; margin-bottom:10px;}
.ai-bubble.bot{background:var(--panel-2); border:1px solid var(--line);}
.ai-bubble.you{background:var(--teal); color:#0E2320; margin-left:auto;}
.ai-suggest-btn{display:inline-block; margin-top:8px; background:var(--panel); border:1px solid var(--teal); color:var(--teal); font-size:11.5px; padding:5px 10px; border-radius:4px; font-family:'IBM Plex Mono',monospace; cursor:pointer;}
.ai-input{display:flex; gap:8px; border-top:1px solid var(--line); padding-top:12px;}
.ai-input input{flex:1; background:var(--panel-2); border:1px solid var(--line); border-radius:4px; padding:10px; color:var(--cream); font-size:13px;}

.builder-topbar{display:flex; align-items:center; justify-content:space-between; padding:0 22px; height:76px; border-bottom:1px solid var(--line); background:var(--panel);}
.builder-topbar .proj-name{font-family:'Fraunces',serif; font-size:16px;}
.builder-topbar .actions{display:flex; gap:10px;}

@media(max-width:1000px){
  .builder-shell{grid-template-columns:1fr; height:auto;}
  .panel-col{border:none; border-bottom:1px solid var(--line);}
}