:root{
  --bg:#f4f5f7; --panel:#ffffff; --line:#e3e5ea; --text:#1f2430; --muted:#6b7280;
  --accent:#2f6fed; --accent-soft:#e8f0fe; --danger:#d93636;
  --top:#1d2433; --top-text:#e9ecf3;
  --radius:8px; --shadow:0 6px 24px rgba(20,25,40,.14);
  font-family: "Segoe UI", system-ui, -apple-system, Roboto, Arial, sans-serif;
}
*{box-sizing:border-box}
html,body{margin:0;height:100%;overflow:hidden;background:var(--bg);color:var(--text);font-size:13px}
button{font:inherit;color:inherit;cursor:pointer}
input,select{font:inherit;color:inherit}
kbd{font-family:inherit;font-size:11px;color:var(--muted);background:#f0f1f4;border:1px solid var(--line);border-radius:4px;padding:0 4px;margin-left:auto}
.hidden{display:none!important}

#app{display:flex;flex-direction:column;height:100vh}

/* ---------- top bar ---------- */
#topbar{height:50px;background:var(--top);color:var(--top-text);display:flex;align-items:center;gap:10px;padding:0 12px;flex-shrink:0;z-index:20}
.brand{display:flex;align-items:center;gap:8px;font-weight:700;font-size:16px;color:#fff;margin-right:6px}
.brand svg{color:#5b9bff}
.project-name{background:transparent;border:1px solid transparent;color:#fff;border-radius:6px;padding:5px 8px;width:190px;font-weight:600}
.project-name:hover{border-color:#3a4458}
.project-name:focus{outline:none;border-color:#5b9bff;background:#121826}
.menu-group,.floor-switch{display:flex;align-items:center;gap:4px}
.tb-btn{background:transparent;border:1px solid transparent;color:inherit;padding:6px 10px;border-radius:6px;white-space:nowrap}
#topbar .tb-btn:hover{background:#2c3549}
.tb-btn.icon{width:32px;padding:6px 0;font-size:16px}
.spacer{flex:1}
#floorSelect{background:#2a3244;border:1px solid #3a4458;color:#fff;border-radius:6px;padding:5px 8px;max-width:150px}
.view-toggle{display:flex;background:#2a3244;border-radius:8px;padding:3px}
.vt{border:0;background:transparent;color:#aab3c5;padding:5px 16px;border-radius:6px;font-weight:600}
.vt.active{background:var(--accent);color:#fff}
.dropdown{position:relative}
.dropdown-menu{position:absolute;top:38px;left:0;background:var(--panel);color:var(--text);min-width:250px;border-radius:var(--radius);box-shadow:var(--shadow);padding:6px;display:none;z-index:50;border:1px solid var(--line)}
.dropdown.open .dropdown-menu{display:block}
.dropdown-menu button{display:flex;width:100%;text-align:left;background:none;border:0;padding:8px 10px;border-radius:6px;gap:8px;align-items:center}
.dropdown-menu button:hover{background:var(--accent-soft)}
.dropdown-menu hr{border:0;border-top:1px solid var(--line);margin:4px 0}

/* ---------- main ---------- */
#main{flex:1;display:flex;min-height:0;position:relative}
#toolrail{width:68px;background:var(--panel);border-right:1px solid var(--line);display:flex;flex-direction:column;align-items:center;padding:8px 0;gap:2px;flex-shrink:0;z-index:5;overflow-y:auto}
.tool{width:58px;height:54px;border:0;background:transparent;border-radius:8px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;color:#475063;font-size:10.5px}
.tool svg{width:22px;height:22px;fill:currentColor}
.tool:hover{background:#f1f3f7}
.tool.active{background:var(--accent-soft);color:var(--accent)}

#library{width:270px;background:var(--panel);border-right:1px solid var(--line);display:flex;flex-direction:column;padding:12px;gap:10px;flex-shrink:0;z-index:4;min-height:0}
.lib-head{display:flex;align-items:center;justify-content:space-between}
.lib-head h3{margin:0;font-size:15px}
#libSearch{width:100%;border:1px solid var(--line);border-radius:6px;padding:7px 10px;background:#fafbfc}
#libCats{display:flex;flex-wrap:wrap;gap:4px}
.cat-chip{border:1px solid var(--line);background:#fff;border-radius:14px;padding:3px 10px;font-size:12px}
.cat-chip.active{background:var(--accent);border-color:var(--accent);color:#fff}
#libItems{flex:1;overflow-y:auto;display:grid;grid-template-columns:1fr 1fr;gap:8px;align-content:start;min-height:0}
.lib-item{border:1px solid var(--line);border-radius:8px;background:#fff;padding:6px;display:flex;flex-direction:column;align-items:center;gap:4px;cursor:grab;user-select:none}
.lib-item:hover{border-color:var(--accent);box-shadow:0 2px 8px rgba(47,111,237,.15)}
.lib-item.armed{border-color:var(--accent);background:var(--accent-soft)}
.lib-item canvas{width:100%;height:70px}
.lib-item .nm{font-size:11.5px;text-align:center;line-height:1.2}
.lib-item .sz{font-size:10px;color:var(--muted)}
.lib-tip{font-size:11px;color:var(--muted);margin:0}
.close-x{border:0;background:none;font-size:20px;line-height:1;color:var(--muted);padding:2px 6px;border-radius:4px}
.close-x:hover{background:#f0f1f4}

#stage{flex:1;position:relative;min-width:0;overflow:hidden;background:#fbfbfc}
#canvas2d{position:absolute;inset:0;width:100%;height:100%;display:block;touch-action:none}
#view3d{position:absolute;inset:0;background:#dfe6ef}
#view3d canvas{display:block;width:100%;height:100%}
.v3d-controls{position:absolute;top:12px;left:12px;display:flex;gap:6px;align-items:center;background:rgba(255,255,255,.92);padding:5px;border-radius:8px;box-shadow:var(--shadow);z-index:2}
.v3d-controls .tb-btn{border:1px solid var(--line);background:#fff}
.v3d-controls .tb-btn.active{background:var(--accent);color:#fff;border-color:var(--accent)}
.v3d-hint{color:var(--muted);font-size:12px;padding:0 6px}
.chk{display:flex;align-items:center;gap:4px;font-size:12px;padding:0 4px}

.hint{position:absolute;top:12px;left:50%;transform:translateX(-50%);background:rgba(29,36,51,.88);color:#fff;padding:6px 14px;border-radius:16px;font-size:12px;pointer-events:none;white-space:nowrap;opacity:0;transition:opacity .2s}
.hint.show{opacity:1}
.length-input{position:absolute;z-index:5}
.length-input input{width:110px;border:2px solid var(--accent);border-radius:6px;padding:4px 8px;font-weight:600;box-shadow:var(--shadow)}
.zoom-ctrl{position:absolute;right:14px;bottom:14px;display:flex;background:var(--panel);border-radius:8px;box-shadow:var(--shadow);overflow:hidden;border:1px solid var(--line)}
.zoom-ctrl button{border:0;background:none;padding:7px 11px;font-size:14px}
.zoom-ctrl button:hover{background:#f1f3f7}
#zoomLabel{font-size:12px;min-width:56px}

/* ---------- properties ---------- */
#props{width:260px;background:var(--panel);border-left:1px solid var(--line);overflow-y:auto;flex-shrink:0}
#propsBody{padding:14px}
.p-title{font-size:15px;font-weight:700;margin:0 0 2px}
.p-sub{color:var(--muted);font-size:12px;margin-bottom:12px}
.p-sec{border-top:1px solid var(--line);padding:12px 0 4px;margin-top:6px}
.p-sec h4{margin:0 0 8px;font-size:11px;text-transform:uppercase;letter-spacing:.06em;color:var(--muted)}
.p-row{display:flex;align-items:center;gap:8px;margin-bottom:8px}
.p-row label{flex:0 0 86px;color:#4b5363;font-size:12px}
.p-row input[type=text],.p-row input[type=number],.p-row select{flex:1;min-width:0;border:1px solid var(--line);border-radius:6px;padding:5px 8px;background:#fafbfc}
.p-row input:focus,.p-row select:focus{outline:none;border-color:var(--accent);background:#fff}
.p-row input[type=color]{width:40px;height:28px;border:1px solid var(--line);border-radius:6px;padding:2px;background:#fff}
.p-row input[type=range]{flex:1}
.swatches{display:flex;flex-wrap:wrap;gap:5px;margin-bottom:8px}
.swatch{width:26px;height:26px;border-radius:6px;border:2px solid #fff;box-shadow:0 0 0 1px var(--line);cursor:pointer;background-size:cover}
.swatch.active{box-shadow:0 0 0 2px var(--accent)}
.btn{border:1px solid var(--line);background:#fff;border-radius:6px;padding:7px 12px}
.btn:hover{border-color:#c8ccd5;background:#f7f8fa}
.btn.primary{background:var(--accent);border-color:var(--accent);color:#fff}
.btn.primary:hover{background:#245ed1}
.btn.danger{color:var(--danger)}
.btn.danger:hover{background:#fdeeee;border-color:#f3c1c1}
.btn-row{display:flex;gap:6px;flex-wrap:wrap;margin:8px 0}
.btn-row .btn{flex:1}
.p-empty{color:var(--muted);line-height:1.6}
.p-empty .big{font-size:15px;color:var(--text);font-weight:600;margin-bottom:6px}
.stat-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin:10px 0}
.stat{background:#f6f7f9;border-radius:8px;padding:8px}
.stat b{display:block;font-size:16px}
.stat span{font-size:11px;color:var(--muted)}

#statusbar{height:26px;background:var(--panel);border-top:1px solid var(--line);display:flex;align-items:center;gap:18px;padding:0 12px;color:var(--muted);font-size:12px;flex-shrink:0}
.sb-right{margin-left:auto}

/* ---------- pro tools ---------- */
.pro-tools{display:flex;gap:4px;margin-right:6px}
#topbar .tb-btn.pro{border:1px solid #3a4458;font-weight:600}
#topbar .tb-btn.pro span{color:#ffcf66;margin-right:2px}
#topbar .tb-btn.pro.accent{background:#f0a020;border-color:#f0a020;color:#1d2433}
#topbar .tb-btn.pro.accent span{color:#1d2433}
#topbar .tb-btn.pro.accent:hover{background:#ffb534}
.modal-card.wide{width:min(980px,96vw)}
.est-top{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-bottom:12px}
.est-top .stat{background:#f6f7f9;border-radius:10px;padding:10px 12px}
.est-top .stat b{display:block;font-size:18px}
.est-top .stat span{font-size:11.5px;color:var(--muted)}
.est-top .stat.hl{background:#fff4dd}
.est-h{margin:6px 0 8px;font-size:12px;text-transform:uppercase;letter-spacing:.06em;color:var(--muted)}
.est-wrap{max-height:42vh;overflow:auto;border:1px solid var(--line);border-radius:8px}
.est-table{width:100%;border-collapse:collapse;font-size:12.5px}
.est-table th{position:sticky;top:0;background:#1d2433;color:#fff;text-align:left;padding:7px 8px;font-weight:600}
.est-table td{padding:6px 8px;border-bottom:1px solid #eef0f3;vertical-align:top}
.est-table .r{text-align:right}
.est-table td.small{font-size:11.5px;color:#4b5363}
.est-table tfoot td{font-weight:600;background:#f6f7f9}
.est-table tfoot tr.grand td{background:#e8f0fe;color:#1d3f8f;font-size:14px}
.est-in{border:1px solid var(--line);border-radius:5px;padding:3px 6px;width:86px;text-align:right;background:#fafbfc}
.est-in:focus{outline:none;border-color:var(--accent);background:#fff}
.est-note{font-size:11.5px;color:var(--muted);line-height:1.5}
.vastu-head{display:flex;gap:16px;align-items:center;margin-bottom:12px}
.vastu-score{width:130px;height:90px;border-radius:12px;background:#f6f7f9;display:flex;flex-direction:column;align-items:center;justify-content:center}
.vastu-score b{font-size:30px}
.vastu-score.good{background:#e6f6ec;color:#167a45}.vastu-score.ok{background:#fff4dd;color:#9a6200}.vastu-score.bad{background:#fdeaea;color:#b42c2c}
.vastu-north label{font-weight:600}
.vastu-north small{color:var(--muted)}
.vs{display:inline-block;padding:2px 8px;border-radius:10px;font-size:11.5px;font-weight:600;white-space:nowrap}
.vs.good{background:#e6f6ec;color:#167a45}.vs.ok{background:#fff4dd;color:#9a6200}.vs.bad{background:#fdeaea;color:#b42c2c}.vs.na{background:#f0f1f4;color:#6b7280}
.rep-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.rep-grid .chk{display:flex;margin:4px 0}
@media (max-width:1100px){.pro-tools .tb-btn{padding:6px 7px}}
@media (max-width:760px){.rep-grid,.est-top{grid-template-columns:1fr}}

/* ---------- modal ---------- */
.modal{position:fixed;inset:0;background:rgba(15,20,30,.45);display:flex;align-items:center;justify-content:center;z-index:100}
.modal-card{background:var(--panel);border-radius:12px;box-shadow:var(--shadow);width:min(640px,92vw);max-height:84vh;display:flex;flex-direction:column}
.modal-head{display:flex;align-items:center;justify-content:space-between;padding:14px 18px;border-bottom:1px solid var(--line)}
.modal-head h3{margin:0;font-size:16px}
#modalBody{padding:16px 18px;overflow-y:auto}
.proj-list{display:flex;flex-direction:column;gap:8px}
.proj-row{display:flex;align-items:center;gap:10px;border:1px solid var(--line);border-radius:8px;padding:8px}
.proj-row img{width:90px;height:60px;object-fit:contain;background:#f6f7f9;border-radius:6px}
.proj-row .meta{flex:1}
.proj-row .meta b{display:block}
.proj-row .meta span{color:var(--muted);font-size:12px}
.help-grid{display:grid;grid-template-columns:1fr 1fr;gap:4px 24px}
.help-grid div{display:flex;justify-content:space-between;border-bottom:1px dashed var(--line);padding:5px 0}
.help-grid kbd{margin-left:8px}
.toast{position:fixed;bottom:40px;left:50%;transform:translateX(-50%) translateY(20px);background:#1d2433;color:#fff;padding:9px 18px;border-radius:8px;opacity:0;transition:all .25s;pointer-events:none;z-index:200}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

@media (max-width:900px){
  #props{position:absolute;right:0;top:0;bottom:0;box-shadow:var(--shadow);z-index:6;width:240px}
  #props.collapsed{display:none}
  .project-name{width:120px}
  .brand span{display:none}
}
@media print{
  #topbar,#toolrail,#library,#props,#statusbar,.zoom-ctrl,.hint{display:none!important}
}

.dim-edit{position:absolute;z-index:8;background:#fff;border:1px solid var(--line);border-radius:10px;box-shadow:var(--shadow);padding:8px 10px;display:flex;flex-direction:column;gap:4px;transform:translate(-50%,-50%)}
.dim-edit label{font-size:11px;font-weight:600;color:var(--muted);text-transform:uppercase;letter-spacing:.05em}
.dim-edit input{width:130px;border:2px solid var(--accent);border-radius:6px;padding:6px 8px;font-size:15px;font-weight:600;outline:none}
.dim-edit small{font-size:10.5px;color:var(--muted)}

.warn{background:#fdecec;color:#b42c2c;border-radius:6px;padding:6px 8px;font-size:12px;margin:6px 0;font-weight:600}
.okmsg{background:#e6f6ec;color:#167a45;border-radius:6px;padding:6px 8px;font-size:12px;margin:6px 0;font-weight:600}
.chips{display:flex;flex-wrap:wrap;gap:4px;margin-bottom:10px}
.hint-s{font-size:10.5px;color:var(--muted);white-space:nowrap}

.bhk-pick{display:flex;flex-direction:column;gap:6px}
.bhk{display:flex;flex-direction:column;align-items:flex-start;text-align:left;border:1px solid var(--line);background:#fff;border-radius:8px;padding:8px 12px}
.bhk b{font-size:14px}.bhk span{font-size:11.5px;color:var(--muted)}
.bhk.active{border-color:var(--accent);background:var(--accent-soft)}

.elev-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.elev-grid figure{margin:0;border:1px solid var(--line);border-radius:8px;overflow:hidden;background:#fff}
.elev-grid img{width:100%;display:block}
.elev-grid figcaption{display:flex;justify-content:space-between;align-items:center;padding:6px 10px;font-size:12px;font-weight:600;border-top:1px solid var(--line)}
.elev-grid figcaption .btn{padding:3px 10px;font-size:11.5px;text-decoration:none;color:inherit}
@media (max-width:760px){.elev-grid{grid-template-columns:1fr}}

.sun-ctl{display:flex;align-items:center;gap:6px;font-size:13px;padding:0 6px;border-left:1px solid var(--line)}
.sun-ctl input[type=range]{width:120px}
.sun-ctl b{font-size:12px;min-width:62px}
.sun-ctl select{border:1px solid var(--line);border-radius:5px;padding:2px 4px;background:#fff}

.base-diagram{margin-top:10px}
.bd{position:relative;width:100%;max-width:300px;border-left:3px solid #6b7280}
.bd-l{display:flex;align-items:center;padding-left:8px;font-size:11px;color:#1f2430;border-bottom:1px solid rgba(0,0,0,.08);overflow:hidden;white-space:nowrap}
.bd-l.pb,.bd-l.eb{background:#c7cbd1}.bd-l.br{background:repeating-linear-gradient(0deg,#efe6d8 0 9px,#e2d6c3 9px 10px)}
.bd-gl{border-top:3px solid #1f2430;font-size:11px;font-weight:700;padding:2px 8px}

.sw-dot{display:inline-block;width:14px;height:14px;border-radius:3px;border:1px solid rgba(0,0,0,.15);vertical-align:-2px;margin-right:6px;background-size:40px}
.fin-set{display:flex;flex-wrap:wrap;gap:12px;align-items:center;margin:12px 0 4px;font-size:12px}
.fin-set label{display:flex;align-items:center;gap:4px}
.fin-name{font-size:12px;font-weight:600;margin:-2px 0 6px}
.fin-name small{font-weight:400;color:var(--muted)}

/* ---------- cloud ---------- */
.tb-btn.acct{border:1px solid #3a4458;margin-left:4px}
.avatar{display:inline-flex;align-items:center;justify-content:center;width:26px;height:26px;border-radius:50%;background:#5b9bff;color:#fff;font-weight:700;font-size:13px}
#topbar .tb-btn.acct:has(.avatar){padding:3px 6px}
.avatar.big{width:44px;height:44px;font-size:20px}
.acct-head{display:flex;gap:12px;align-items:center;margin-bottom:12px}
.acct-head b{display:block;font-size:15px}.acct-head span{color:var(--muted);font-size:12px}
.gsi-wrap{display:flex;justify-content:center;min-height:44px;margin:4px 0}
.code-input{letter-spacing:6px;font-size:20px;text-align:center;font-weight:700}
.or-line{display:flex;align-items:center;gap:10px;color:var(--muted);font-size:12px;margin:14px 0 10px}
.or-line:before,.or-line:after{content:'';flex:1;border-top:1px solid var(--line)}
.share-link{display:flex;gap:6px;margin:10px 0}
.share-link input{flex:1;border:1px solid var(--line);border-radius:6px;padding:8px 10px;background:#fafbfc}
.btn.wa{background:#25d366;border-color:#25d366;color:#fff;text-decoration:none;text-align:center}
.pub{color:#167a45;font-weight:600}
.sb-cloud{margin-left:auto}
.sb-cloud + .sb-right{margin-left:12px}
.sb-cloud.synced{color:#167a45}.sb-cloud.error{color:#b42c2c}.sb-cloud.offline{color:#9a6200}
.topnote{display:flex;align-items:center;gap:12px;justify-content:center;padding:7px 12px;font-size:13px;flex-shrink:0}
.topnote.upd{background:#fff4dd;color:#5c4100}
.topnote.ro{background:#e8f0fe;color:#1d3f8f}
.topnote .btn{padding:4px 12px}
body.readonly #toolrail, body.readonly .pro-tools, body.readonly .menu-group, body.readonly #props, body.readonly [data-action="addFloor"], body.readonly [data-action="floorSettings"], body.readonly #acctBtn{display:none!important}
body.readonly #sbSaved{visibility:hidden} body.readonly{-webkit-user-select:none;user-select:none}