*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg:#FAFAF8;--ink:#1C1C1A;--ink2:#6B6860;--ink3:#A8A59F;
  --accent:#F26B22;--accent-dk:#C9540F;
  --border:#E4DED5;--card:#F2EDE6;--white:#FFFFFF;
  --panel-w:260px;--summary-w:220px;
}
html{background:var(--bg);color:var(--ink);font-family:'Inter',sans-serif;font-size:14px;height:100%}
body{height:100%;display:flex;flex-direction:column;overflow:hidden}

/* ROOM MODAL */
.modal-bg{position:fixed;inset:0;background:rgba(0,0,0,.4);z-index:200;display:flex;align-items:center;justify-content:center;opacity:0;pointer-events:none;transition:opacity .2s}
.modal-bg.open{opacity:1;pointer-events:all}
.modal{background:var(--white);border-radius:16px;padding:24px;width:360px;box-shadow:0 20px 60px rgba(0,0,0,.15)}
.modal h3{font-size:15px;font-weight:500;color:var(--ink);margin-bottom:4px}
.modal-sub{font-size:12px;color:var(--ink3);margin-bottom:20px}
.room-fields{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-bottom:16px}
.room-field{display:flex;flex-direction:column;gap:5px}
.room-field label{font-size:11px;color:var(--ink3);font-weight:500;text-transform:uppercase;letter-spacing:.06em}
.room-field input{border:1px solid var(--border);border-radius:8px;padding:8px 10px;font-size:14px;font-family:'Inter',sans-serif;color:var(--ink);background:var(--bg);outline:none;width:100%}
.room-field input:focus{border-color:var(--accent)}
.room-field .unit{font-size:11px;color:var(--ink3);margin-top:2px}
.room-preview{background:var(--card);border-radius:10px;padding:12px;margin-bottom:16px;text-align:center}
.room-preview-box{display:inline-block;background:var(--white);border:1.5px solid var(--border);position:relative;margin:8px auto}
.room-preview-label{font-size:11px;color:var(--ink3);position:absolute;bottom:-18px;left:50%;transform:translateX(-50%);white-space:nowrap}
.room-preview-label-h{font-size:11px;color:var(--ink3);position:absolute;right:-44px;top:50%;transform:translateY(-50%) rotate(90deg);white-space:nowrap}
.modal-btns{display:flex;gap:8px;justify-content:flex-end}
/* ROOM INDICATOR in toolbar */
.room-indicator{font-size:11px;color:var(--ink2);background:var(--card);border:1px solid var(--border);border-radius:6px;padding:4px 10px;cursor:pointer;transition:all .15s;white-space:nowrap}
.room-indicator:hover{border-color:var(--accent);color:var(--accent)}
.room-fit{color:#3B6D11!important;border-color:#3B6D11!important;background:#EAF3DE!important}
.room-over{color:#A32D2D!important;border-color:#A32D2D!important;background:#FCEBEB!important}

/* NAV */
nav{height:64px;background:rgba(250,250,248,.92);backdrop-filter:blur(10px);border-bottom:1px solid var(--border);display:flex;align-items:center;padding:0 20px;gap:16px;flex-shrink:0;z-index:100}
.logo{font-family:'Noto Sans',sans-serif;font-weight:900;font-size:17px;color:var(--accent);text-decoration:none;letter-spacing:-.3px;flex-shrink:0}
.nav-title{font-size:13px;color:var(--ink2);flex:1}
.nav-title strong{color:var(--ink);font-weight:500}
.btn{border:none;border-radius:100px;padding:8px 18px;font-size:12px;font-family:'Inter',sans-serif;font-weight:500;cursor:pointer;transition:all .2s;white-space:nowrap}
.btn-ghost{background:transparent;border:1px solid var(--border);color:var(--ink2)}
.btn-ghost:hover{border-color:var(--ink);color:var(--ink)}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{background:var(--accent-dk)}
.btn-dark{background:var(--ink);color:#fff}
.btn-dark:hover{background:#333}

/* LAYOUT */
.app{flex:1;display:flex;overflow:hidden}

/* LEFT PANEL */
.panel{width:var(--panel-w);border-right:1px solid var(--border);display:flex;flex-direction:column;background:var(--white);flex-shrink:0;overflow:hidden}
.panel-head{padding:14px 16px 10px;border-bottom:1px solid var(--border)}
.panel-head h2{font-size:11px;font-weight:500;text-transform:uppercase;letter-spacing:.1em;color:var(--ink3);margin-bottom:10px}
.search{width:100%;border:1px solid var(--border);border-radius:8px;padding:7px 10px;font-size:12px;font-family:'Inter',sans-serif;color:var(--ink);background:var(--bg);outline:none}
.search:focus{border-color:var(--accent)}
.cats{display:flex;gap:4px;flex-wrap:wrap;margin-top:8px}
.cat{border:none;background:transparent;border-radius:100px;padding:4px 10px;font-size:11px;font-family:'Inter',sans-serif;color:var(--ink2);cursor:pointer;border:1px solid var(--border);transition:all .15s}
.cat.active,.cat:hover{background:var(--ink);color:#fff;border-color:var(--ink)}
.modules-list{flex:1;overflow-y:auto;padding:10px 8px}
.module-item{display:flex;align-items:center;gap:10px;padding:8px;border-radius:8px;cursor:pointer;transition:background .15s;margin-bottom:2px;border:1px solid transparent}
.module-item:hover{background:var(--card);border-color:var(--border)}
.module-item.dragging{opacity:.4}
.mod-icon{width:44px;height:44px;border-radius:6px;background:var(--card);border:1px solid var(--border);display:flex;align-items:center;justify-content:center;flex-shrink:0;font-size:10px;color:var(--ink3);overflow:hidden}
.mod-icon canvas{display:block}
.mod-info{flex:1;min-width:0}
.mod-name{font-size:12px;font-weight:500;color:var(--ink);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.mod-dims{font-size:10px;color:var(--ink3);margin-top:1px}
.mod-price{font-size:11px;color:var(--accent);font-weight:500;flex-shrink:0}
.add-btn{width:22px;height:22px;border-radius:50%;border:none;background:var(--accent);color:#fff;font-size:14px;cursor:pointer;display:flex;align-items:center;justify-content:center;flex-shrink:0;opacity:0;transition:opacity .15s}
.module-item:hover .add-btn{opacity:1}

/* CENTER - 3D SCENE */
.scene-wrap{flex:1;display:flex;flex-direction:column;overflow:hidden;position:relative}
.scene-toolbar{height:40px;border-bottom:1px solid var(--border);display:flex;align-items:center;padding:0 12px;gap:8px;background:var(--white);flex-shrink:0}
.tool-btn{border:none;background:transparent;padding:5px 8px;border-radius:6px;font-size:11px;font-family:'Inter',sans-serif;color:var(--ink2);cursor:pointer;display:flex;align-items:center;gap:4px;transition:background .15s}
.tool-btn:hover,.tool-btn.active{background:var(--card);color:var(--ink)}
.tool-sep{width:1px;height:20px;background:var(--border);margin:0 4px}
.scene-canvas{flex:1;position:relative;overflow:hidden}
#three-canvas{display:block;width:100%;height:100%}
.scene-hint{position:absolute;bottom:16px;left:50%;transform:translateX(-50%);font-size:11px;color:var(--ink3);background:rgba(250,250,248,.85);backdrop-filter:blur(6px);padding:6px 14px;border-radius:100px;border:1px solid var(--border);pointer-events:none;white-space:nowrap}
.drop-overlay{position:absolute;inset:0;border:2px dashed var(--accent);background:rgba(242,107,34,.05);border-radius:4px;display:none;align-items:center;justify-content:center;pointer-events:none;z-index:10}
.drop-overlay.visible{display:flex}
.drop-text{font-size:16px;font-weight:500;color:var(--accent)}

/* RIGHT PANEL - SUMMARY */
.summary{width:var(--summary-w);border-left:1px solid var(--border);display:flex;flex-direction:column;background:var(--white);flex-shrink:0}
.summary-head{padding:14px 16px 10px;border-bottom:1px solid var(--border)}
.summary-head h2{font-size:11px;font-weight:500;text-transform:uppercase;letter-spacing:.1em;color:var(--ink3);margin-bottom:2px}
.summary-name{font-size:15px;font-weight:500;color:var(--ink);font-family:'Noto Sans',sans-serif}
.summary-items{flex:1;overflow-y:auto;padding:8px}
.summary-empty{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100%;color:var(--ink3);font-size:12px;text-align:center;gap:8px;padding:20px}
.s-item{display:flex;align-items:center;justify-content:space-between;padding:8px;border-radius:6px;background:var(--card);margin-bottom:4px;gap:8px}
.s-item-name{font-size:11px;font-weight:500;color:var(--ink);flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.s-item-price{font-size:11px;color:var(--ink2);flex-shrink:0}
.s-item-del{border:none;background:transparent;color:var(--ink3);cursor:pointer;font-size:14px;flex-shrink:0;padding:0 2px;line-height:1}
.s-item-del:hover{color:#E24B4A}
.summary-dims{padding:10px 16px;border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.dim-row{display:flex;justify-content:space-between;font-size:11px;color:var(--ink2);margin-bottom:3px}
.dim-row span:last-child{color:var(--ink);font-weight:500}
.summary-total{padding:12px 16px}
.total-row{display:flex;justify-content:space-between;align-items:center;margin-bottom:10px}
.total-label{font-size:12px;color:var(--ink2)}
.total-price{font-size:20px;font-weight:700;font-family:'Noto Sans',sans-serif;color:var(--ink)}
.color-picker{margin-bottom:12px}
.color-label{font-size:11px;color:var(--ink3);margin-bottom:6px}
.colors{display:flex;gap:5px;flex-wrap:wrap}
.color-swatch{width:20px;height:20px;border-radius:50%;cursor:pointer;border:2px solid transparent;transition:transform .15s}
.color-swatch.active{border-color:var(--ink);transform:scale(1.2)}
.summary-btns{display:flex;flex-direction:column;gap:6px}

/* SELECTED HIGHLIGHT */
.selected-info{position:absolute;top:8px;left:50%;transform:translateX(-50%);background:var(--white);border:1px solid var(--border);border-radius:8px;padding:6px 14px;font-size:11px;color:var(--ink);display:none;gap:12px;align-items:center;z-index:5;box-shadow:0 2px 8px rgba(0,0,0,.08)}
.selected-info.visible{display:flex}
.sel-name{font-weight:500}
.sel-del{border:none;background:none;color:#E24B4A;cursor:pointer;font-size:11px;font-weight:500}