:root{--bg:#fff;--bg-soft:#f6f5f2;--border:#e3e1db;--text:#25252a;--muted:#74716a;--accent:#2f6fed;--accent-soft:#e8effd;--danger:#c93c3c;--radius:7px;color:var(--text);font-family:system-ui,-apple-system,Segoe UI,sans-serif;font-size:13px}*{box-sizing:border-box}html,body{background:var(--bg);height:100%;margin:0;overflow:hidden}body{grid-template-rows:auto 1fr auto;display:grid}button,select,input{font:inherit;color:inherit}button{border-radius:var(--radius);cursor:pointer;white-space:nowrap;background:0 0;border:1px solid #0000;align-items:center;gap:6px;height:30px;padding:0 10px;display:inline-flex}button:hover:not(:disabled){background:var(--bg-soft)}button:disabled{opacity:.35;cursor:default}button.active{background:var(--accent-soft);color:var(--accent)}button.icon{padding:0 7px}svg{fill:currentColor;width:18px;height:18px}svg.line{fill:none;stroke:currentColor;stroke-width:1.6px;stroke-linejoin:round;stroke-linecap:round}kbd{border:1px solid var(--border);background:var(--bg);text-align:center;border-bottom-width:2px;border-radius:4px;min-width:18px;padding:0 4px;font:11px/16px ui-monospace,monospace;display:inline-block}.toolbar{border-bottom:1px solid var(--border);align-items:center;gap:10px;padding:8px 12px;display:flex;overflow-x:auto}.brand{white-space:nowrap;margin-right:4px;font-size:14px;font-weight:700}.group{border-left:1px solid var(--border);align-items:center;gap:2px;padding-left:10px;display:flex}.spacer{flex:1}.seg{background:var(--bg-soft);border-radius:9px;padding:2px;display:flex}.seg button{height:28px}.seg button.active{background:var(--bg);color:var(--text);box-shadow:0 1px 2px #0000001f}.snap{color:var(--muted);align-items:center;gap:6px;display:flex}.snap select{border:1px solid var(--border);border-radius:var(--radius);background:var(--bg);height:28px;padding:0 4px}.file button{border-color:var(--border);margin-left:4px}main{grid-template-columns:1fr 280px;min-height:0;display:grid}.viewport{min-width:0;min-height:0;position:relative}#plan,#view3d{touch-action:none;outline:none;width:100%;height:100%;position:absolute;inset:0}#view3d[hidden]{display:none}.panel{border-left:1px solid var(--border);background:var(--bg);padding:14px;overflow-y:auto}.panel-head h2{margin:0;font-size:15px}.panel-head p{color:var(--muted);margin:2px 0 0}.fields{gap:8px;margin:14px 0;display:grid}.field{color:var(--muted);grid-template-columns:1fr 120px;align-items:center;gap:8px;display:grid}.field input[type=text],.input-unit{border:1px solid var(--border);border-radius:var(--radius);background:var(--bg);height:30px}.field input[type=text]{width:100%;padding:0 8px}.input-unit{align-items:center;padding-right:8px;display:flex}.input-unit:focus-within,.field input[type=text]:focus{border-color:var(--accent);outline:2px solid var(--accent-soft)}.input-unit input{text-align:right;font-variant-numeric:tabular-nums;background:0 0;border:0;outline:0;width:100%;min-width:0;padding:0 8px}.input-unit em{color:var(--muted);font-style:normal}.field input[type=color]{border:1px solid var(--border);border-radius:var(--radius);background:var(--bg);width:100%;height:30px;padding:2px}.field.wide{grid-template-columns:auto 1fr}.field select{border:1px solid var(--border);border-radius:var(--radius);background:var(--bg);width:100%;height:30px;color:var(--text);padding:0 6px}.field.check{color:var(--text);cursor:pointer;gap:8px;display:flex}.panel-actions{flex-wrap:wrap;gap:6px;display:flex}.panel-actions button{border-color:var(--border)}.panel-actions button.danger{color:var(--danger)}.summary{margin:12px 0 18px}.stat-grid{grid-template-columns:1fr 1fr;gap:8px;display:grid}.stat-grid div{border-radius:var(--radius);background:var(--bg-soft);padding:10px}.stat-grid b{font-variant-numeric:tabular-nums;font-size:18px;display:block}.stat-grid span{color:var(--muted)}.room-list{margin:12px 0 0;padding:0;list-style:none}.room-list li{border-bottom:1px solid var(--border);font-variant-numeric:tabular-nums;justify-content:space-between;padding:6px 2px;display:flex}.room-list li span{color:var(--muted)}.help h3{text-transform:uppercase;letter-spacing:.04em;color:var(--muted);margin:16px 0 6px;font-size:12px}.help ul{margin:0;padding-left:16px;line-height:1.7}.status{border-top:1px solid var(--border);color:var(--muted);font-variant-numeric:tabular-nums;justify-content:space-between;gap:12px;min-height:24px;padding:4px 12px;font-size:12px;display:flex}@media (width<=800px){main{grid-template-rows:1fr auto;grid-template-columns:1fr}.panel{border-left:0;border-top:1px solid var(--border);max-height:40vh}.tools button span{display:none}}.overlay-3d{gap:6px;display:flex;position:absolute;bottom:12px;left:12px}.overlay-3d button{border-color:var(--border);background:#ffffffeb;box-shadow:0 1px 3px #00000014}.overlay-3d button[hidden]{display:none}.overlay-3d button:hover{background:#fff}.overlay-3d button.active{background:var(--accent-soft);color:var(--accent);border-color:#c5d6fb}.walk-hint{pointer-events:none;position:absolute;inset:0}.walk-hint[hidden]{display:none}.walk-hint .crosshair{background:#ffffffe6;border-radius:50%;width:6px;height:6px;margin:-3px 0 0 -3px;position:absolute;top:50%;left:50%;box-shadow:0 0 0 1px #00000059}.walk-keys{border-radius:var(--radius);color:#fff;white-space:nowrap;background:#0000008c;padding:6px 12px;font-size:12px;position:absolute;top:12px;left:50%;transform:translate(-50%)}.plan-name{text-overflow:ellipsis;white-space:nowrap;max-width:180px;color:var(--muted);font-size:12px;overflow:hidden}.plan-name.unsaved{color:#b7791f}.plan-name.error{color:var(--danger)}dialog{border:1px solid var(--border);border-radius:12px;width:min(460px,100vw - 32px);padding:18px;box-shadow:0 12px 40px #0000002e}dialog::backdrop{background:#14141940}dialog h2{margin:0;font-size:15px}.dialog-sub{color:var(--muted);margin:2px 0 12px}.plan-list{border:1px solid var(--border);border-radius:var(--radius);max-height:320px;margin:0;padding:0;list-style:none;overflow-y:auto}.plan-list li+li{border-top:1px solid var(--border)}.plan-list button{border-radius:0;justify-content:space-between;width:100%;height:auto;padding:10px 12px}.plan-list button span{color:var(--muted);font-size:12px}.plan-list .empty{color:var(--muted);padding:16px 12px}.dialog-actions{gap:6px;margin-top:14px;display:flex}.dialog-actions button{border-color:var(--border)}