:root{--bg-color: #1e1e1e;--bg-color-secondary: #252526;--panel-bg: #2d2d2d;--panel-bg-hover: #353535;--panel-bg-active: #3c3c3c;--text-primary: #cccccc;--text-secondary: #858585;--text-muted: #5a5a5a;--accent-color: #00bcd4;--accent-hover: #00a5bb;--accent-muted: rgba(0, 188, 212, .15);--border-color: #3c3c3c;--border-color-strong: #505050;--danger-color: #f44336;--danger-hover: #d32f2f;--btn-secondary-bg: transparent;--btn-secondary-border: #505050;--btn-secondary-hover-bg: #353535;--scrollbar-thumb: #555;--scrollbar-track: transparent;--box-shadow: 0 2px 8px rgba(0, 0, 0, .4);--border-radius: 1px;--font-family: "Segoe UI", system-ui, -apple-system, sans-serif;--font-mono: "Consolas", "SF Mono", "Fira Code", monospace;--overlay-color: rgba(0, 188, 212, .08);--canvas-bg-r: .12;--canvas-bg-g: .12;--canvas-bg-b: .13;--grid-emissive-r: .3;--grid-emissive-g: .3;--grid-emissive-b: .3;--fov-fill: rgba(0, 188, 212, .2);--fov-stroke: rgba(0, 188, 212, .5);--fov-center-stroke: rgba(0, 188, 212, .7);--slice-active-color: #2563eb;--kbd-color: #e8b84a;--kbd-bg: rgba(232, 184, 74, .1);--kbd-border: rgba(232, 184, 74, .3);--help-color: #e8b84a;--help-bg: rgba(232, 184, 74, .1);--help-border: rgba(232, 184, 74, .3)}body.theme-light{--bg-color: #f0f0f0;--bg-color-secondary: #e8e8e8;--panel-bg: #ffffff;--panel-bg-hover: #f5f5f5;--panel-bg-active: #ebebeb;--text-primary: #1e1e1e;--text-secondary: #616161;--text-muted: #9e9e9e;--accent-color: #0078d4;--accent-hover: #006abc;--accent-muted: rgba(0, 120, 212, .12);--border-color: #d1d1d1;--border-color-strong: #b0b0b0;--danger-color: #e63946;--danger-hover: #cc333f;--btn-secondary-bg: transparent;--btn-secondary-border: #c0c0c0;--btn-secondary-hover-bg: #e8e8e8;--scrollbar-thumb: #bbb;--scrollbar-track: transparent;--box-shadow: 0 2px 8px rgba(0, 0, 0, .1);--overlay-color: rgba(0, 120, 212, .06);--canvas-bg-r: .94;--canvas-bg-g: .94;--canvas-bg-b: .94;--grid-emissive-r: .55;--grid-emissive-g: .55;--grid-emissive-b: .55;--fov-fill: rgba(120, 120, 120, .25);--fov-stroke: rgba(100, 100, 100, .5);--fov-center-stroke: rgba(80, 80, 80, .7);--kbd-color: var(--text-muted);--kbd-bg: var(--bg-color-secondary);--kbd-border: var(--border-color);--help-color: var(--text-muted);--help-bg: var(--bg-color-secondary);--help-border: var(--border-color)}*{margin:0;padding:0;box-sizing:border-box;font-family:var(--font-family)}body,html{width:100%;height:100%;overflow:hidden;background-color:var(--bg-color);color:var(--text-primary)}.login-overlay{position:fixed;top:0;left:0;width:100%;height:100%;background:var(--bg-color);display:flex;justify-content:center;align-items:center;z-index:1000}.login-overlay.hidden{display:none}.login-card{background:var(--panel-bg);border:1px solid var(--border-color);border-radius:var(--border-radius);padding:3rem;box-shadow:var(--box-shadow);text-align:center;max-width:400px;width:90%}.login-card h1{font-size:1.6rem;margin-bottom:.5rem}.login-card p{color:var(--text-secondary);margin-bottom:1.5rem}#google-signin-btn{display:flex;justify-content:center}.user-bar{position:fixed;top:0;left:0;right:0;display:flex;align-items:center;gap:.5rem;padding:.5rem 1rem;background:var(--panel-bg);border-bottom:1px solid var(--border-color);z-index:500}.user-bar.hidden{display:none}.user-avatar{width:28px;height:28px;border-radius:50%;object-fit:cover}.user-name{font-size:.8rem;font-weight:500;color:var(--text-primary)}.btn-theme-toggle{display:flex;align-items:center;justify-content:center;width:28px;height:28px;padding:0;margin-left:auto;background:none;border:1px solid var(--border-color);border-radius:var(--border-radius);color:var(--text-secondary);cursor:pointer;transition:all .15s}.btn-theme-toggle:hover{color:var(--accent-color);border-color:var(--accent-color)}.btn-signout{font-family:var(--font-family);font-size:.75rem;font-weight:500;background:none;border:1px solid var(--border-color);border-radius:var(--border-radius);padding:.25rem .5rem;cursor:pointer;color:var(--text-secondary);transition:all .15s}.btn-signout:hover{color:var(--danger-color);border-color:var(--danger-color)}#myCanvas{width:100%;height:100%;position:absolute;top:0;left:0;z-index:1}#navcube-canvas{position:absolute;bottom:2rem;right:2rem;width:250px;height:250px;z-index:10;pointer-events:auto;display:none}#overview-canvas{position:absolute;top:2rem;right:2rem;width:250px;height:250px;z-index:10;pointer-events:none;background:var(--panel-bg);border:1px solid var(--border-color);border-radius:var(--border-radius);box-shadow:var(--box-shadow)}.overlay{position:absolute;top:0;left:0;width:100%;height:100%;display:flex;justify-content:center;align-items:center;z-index:20;pointer-events:none}.overlay.hidden{display:none}.glass-panel{background:var(--panel-bg);border:1px solid 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.2s}.dropzone:hover,.dropzone.drag-over{border-color:var(--accent-color);background:var(--panel-bg-hover)}.dropzone-title{font-size:.95rem;font-weight:500;color:var(--text-primary);margin-bottom:.25rem}.dropzone-hint{font-size:.8rem;color:var(--text-muted)}.upload-actions{margin-top:.75rem}#file-input{display:none}.url-divider{display:flex;align-items:center;margin:1rem 0 .75rem;gap:.75rem}.url-divider:before,.url-divider:after{content:"";flex:1;height:1px;background:var(--border-color)}.url-divider span{font-size:.75rem;color:var(--text-muted);white-space:nowrap}.url-load-row{display:flex;gap:.5rem;width:100%}#url-input{flex:1;padding:.5rem .75rem;background:var(--panel-bg-hover);border:1px solid var(--border-color);border-radius:var(--border-radius);color:var(--text-primary);font-size:.85rem;font-family:inherit;outline:none}#url-input:focus{border-color:var(--accent-color)}#url-input::placeholder{color:var(--text-muted)}.url-load-row .btn-primary{white-space:nowrap;padding:.5rem 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260px);object-fit:contain}.toolbar-dropdown.active{display:block}.toolbar-dropdown::-webkit-scrollbar{width:4px}.toolbar-dropdown::-webkit-scrollbar-track{background:var(--scrollbar-track)}.toolbar-dropdown::-webkit-scrollbar-thumb{background:var(--scrollbar-thumb);border-radius:2px}.actions{display:flex;gap:.5rem;margin-top:.75rem;margin-bottom:.5rem}.kbd-hint{font-family:var(--font-mono);font-size:.65rem;padding:.1rem .35rem;border:1px solid var(--kbd-border);border-radius:3px;background:var(--kbd-bg);color:var(--kbd-color);margin-left:.25rem;margin-right:auto;vertical-align:middle}.section-content{padding:.65rem;display:flex;flex-direction:column;gap:.5rem}.pov-actions 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var(--border-color);border-radius:var(--border-radius);background:var(--bg-color-secondary);color:var(--text-primary);cursor:pointer;outline:none}.storey-select:disabled{opacity:.5;cursor:not-allowed}.floor-plan-toolbar{display:flex;align-items:center;gap:.4rem}.floor-plan-toolbar .storey-select{flex:1}.fp-popout-toggle{display:flex;align-items:center;justify-content:center;width:28px;height:28px;border:1px solid var(--border-color);border-radius:var(--border-radius);background:var(--panel-bg);cursor:pointer;color:var(--text-secondary);flex-shrink:0;transition:background .15s,color .15s}.fp-popout-toggle:hover{color:var(--text-primary);background:var(--panel-bg-hover)}.fp-popout-toggle input{display:none}.fp-popout-toggle.active{background:var(--accent-color);color:#fff;border-color:var(--accent-color)}.floor-plan-container{position:relative;width:100%;background:var(--bg-color-secondary);border:1px solid var(--border-color);border-radius:var(--border-radius);overflow:hidden;cursor:crosshair}.floor-plan-container.loading:after{content:"Generating…";position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:var(--bg-color-secondary);color:var(--text-secondary);font-size:.8rem;z-index:6}.floor-plan-img{width:100%;display:block;pointer-events:none}.floor-plan-overlay{position:absolute;top:0;left:0;width:100%;height:100%;pointer-events:none;z-index:4}.floor-plan-pointer{position:absolute;width:10px;height:10px;background:var(--danger-color);border:2px solid white;border-radius:50%;transform:translate(-50%,-50%);pointer-events:none;display:none;box-shadow:0 0 4px #0006;z-index:5}.floor-plan-float{position:fixed;top:120px;width:320px;height:360px;min-width:200px;min-height:200px;background:var(--panel-bg);border:1px solid var(--border-color);border-radius:var(--border-radius);box-shadow:0 8px 32px 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var(--border-color);border-radius:var(--border-radius);padding:.5rem}.tree-view-container::-webkit-scrollbar{width:4px}.tree-view-container::-webkit-scrollbar-track{background:var(--scrollbar-track)}.tree-view-container::-webkit-scrollbar-thumb{background:var(--scrollbar-thumb);border-radius:2px}.tree-view-container ul{list-style:none;padding-left:1rem;margin:0}.tree-view-container ul li{padding:1px 0}.tree-view-container ul li span{cursor:pointer}.tree-view-container ul li span:hover{color:var(--accent-color);text-decoration:underline}.tree-view-container .highlighted-node{background:var(--accent-muted);border-radius:2px}.btn-active{background-color:var(--accent-color)!important;color:#fff!important;border-color:var(--accent-color)!important}.btn-fp-active{background-color:var(--danger-color)!important;color:#fff!important;border-color:var(--danger-color)!important}.btn-slice-active{background-color:var(--slice-active-color)!important;color:#fff!important;border-color:var(--slice-active-color)!important}.btn-slice-selected{background-color:var(--danger-color)!important;color:#fff!important;border-color:var(--danger-color)!important}.viewpoints-list{display:flex;flex-direction:column;gap:.35rem}.viewpoint-item{display:flex;align-items:center;justify-content:space-between;padding:.45rem .65rem;background:var(--bg-color-secondary);border:1px solid var(--border-color);border-radius:var(--border-radius);font-size:.8rem;cursor:pointer;transition:background .15s}.viewpoint-item:hover{background:var(--panel-bg-hover)}.viewpoint-item .vp-name{font-weight:500}.viewpoint-item .vp-delete{background:none;border:none;cursor:pointer;color:var(--danger-color);font-size:.85rem;padding:0 .25rem;line-height:1}.slice-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:.5rem}.slice-grid button{padding:.4rem;font-size:.85rem}.slider-container{display:flex;flex-direction:column;gap:.5rem;margin-bottom:.5rem}.slider-container label{font-size:.85rem;color:var(--text-secondary)}input[type=range]{-webkit-appearance:none;appearance:none;width:100%;background:transparent}input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;height:14px;width:14px;border-radius:50%;background:var(--accent-color);cursor:pointer;margin-top:-5px;box-shadow:0 1px 3px #0000004d}input[type=range]::-webkit-slider-runnable-track{width:100%;height:4px;cursor:pointer;background:var(--border-color-strong);border-radius:var(--border-radius)}input[type=range]:disabled::-webkit-slider-thumb{background:var(--text-muted)}button{font-family:var(--font-family);font-weight:500;border:none;border-radius:var(--border-radius);padding:.75rem 1.5rem;cursor:pointer;transition:all .15s;font-size:.95rem}.btn-primary{background-color:var(--accent-color);color:#fff}.btn-primary:hover{background-color:var(--accent-hover)}.btn-secondary{background-color:var(--btn-secondary-bg);color:var(--text-primary);border:1px solid var(--btn-secondary-border)}.btn-secondary:hover{background-color:var(--btn-secondary-hover-bg);border-color:var(--border-color-strong)}.btn-danger{background-color:var(--danger-color);color:#fff;width:100%}.btn-danger:hover{background-color:var(--danger-hover)}.loading{position:absolute;bottom:2rem;left:2rem;background:var(--panel-bg);padding:1rem 1.5rem;border-radius:var(--border-radius);border:1px solid var(--border-color);display:flex;align-items:center;gap:1rem;box-shadow:var(--box-shadow);color:var(--text-primary);font-weight:500;pointer-events:auto}.loading.hidden{display:none}.spinner{width:20px;height:20px;border:3px solid var(--border-color);border-top-color:var(--accent-color);border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}body.dragover:after{content:"";position:absolute;top:0;left:0;width:100%;height:100%;background:var(--overlay-color);z-index:100;pointer-events:none;border:4px dashed var(--accent-color);box-sizing:border-box}.btn-help{display:inline-flex;align-items:center;justify-content:center;width:18px;height:18px;padding:0;margin-left:auto;font-size:.7rem;font-weight:700;font-family:var(--font-family);color:var(--help-color);background:var(--help-bg);border:1px solid var(--help-border);border-radius:50%;cursor:pointer;line-height:1;transition:all .15s;flex-shrink:0}.btn-help:hover{color:var(--accent-color);border-color:var(--accent-color);background:var(--panel-bg-hover)}.btn-user-guide{display:flex;align-items:center;gap:.4rem;width:100%;padding:.45rem .75rem;margin-bottom:.5rem;font-family:var(--font-family);font-size:.8rem;font-weight:500;color:var(--help-color);background:var(--help-bg);border:1px solid var(--help-border);border-radius:var(--border-radius);cursor:pointer;transition:all .15s}.btn-user-guide:hover{color:var(--accent-color);border-color:var(--accent-color);background:var(--accent-muted)}.btn-user-guide svg{flex-shrink:0}.help-panel{position:fixed;top:120px;left:400px;width:340px;max-height:420px;background:var(--panel-bg);border:1px solid var(--border-color);border-radius:var(--border-radius);box-shadow:0 8px 32px #0000004d;z-index:600;display:flex;flex-direction:column;overflow:hidden}.help-panel.hidden{display:none}.help-panel-header{display:flex;align-items:center;justify-content:space-between;padding:.6rem .85rem;background:var(--bg-color-secondary);border-bottom:1px solid var(--border-color);cursor:grab;-webkit-user-select:none;user-select:none}.help-panel-header:active{cursor:grabbing}.help-panel-title{font-weight:500;font-size:.85rem;color:var(--text-primary)}.help-panel-close{display:flex;align-items:center;justify-content:center;width:22px;height:22px;padding:0;font-size:1.1rem;font-weight:400;color:var(--text-secondary);background:none;border:1px solid transparent;border-radius:var(--border-radius);cursor:pointer;line-height:1;transition:all .15s}.help-panel-close:hover{color:var(--danger-color);border-color:var(--danger-color);background:#f4433614}.help-panel-body{padding:.85rem;overflow-y:auto;font-size:.8rem;line-height:1.55;color:var(--text-primary)}.help-panel-body h4{font-size:.82rem;margin-bottom:.35rem;margin-top:.65rem}.help-panel-body h4:first-child{margin-top:0}.help-panel-body p{font-size:.8rem;margin-bottom:.5rem;line-height:1.55;color:var(--text-secondary)}.help-panel-body ul{margin:0 0 .5rem 1.1rem;padding:0;color:var(--text-secondary);font-size:.8rem}.help-panel-body li{margin-bottom:.2rem}.help-panel-body kbd{display:inline-block;padding:.1rem .35rem;font-size:.72rem;font-family:var(--font-mono);background:var(--bg-color-secondary);border:1px solid var(--border-color);border-radius:2px}.tool-wheel{position:fixed;z-index:500;width:200px;height:200px;transform:translate(-50%,-50%);pointer-events:none}.tool-wheel.hidden{display:none}.tool-wheel-ring{position:absolute;inset:0;border-radius:50%;overflow:hidden;box-shadow:0 4px 24px #0006;pointer-events:auto}.tool-wheel-center{position:absolute;width:52px;height:52px;border-radius:50%;background:var(--panel-bg);border:2px solid var(--border-color);top:50%;left:50%;transform:translate(-50%,-50%);z-index:2;pointer-events:auto}.tool-wheel-sector{position:absolute;width:100%;height:100%;display:flex;align-items:center;justify-content:center;background:var(--panel-bg);cursor:pointer;transition:background .1s;pointer-events:auto}.tool-wheel-sector[data-pos=top]{clip-path:polygon(50% 50%,0 0,100% 0)}.tool-wheel-sector[data-pos=right]{clip-path:polygon(50% 50%,100% 0,100% 100%)}.tool-wheel-sector[data-pos=bottom]{clip-path:polygon(50% 50%,100% 100%,0 100%)}.tool-wheel-sector[data-pos=left]{clip-path:polygon(50% 50%,0 100%,0 0)}.tool-wheel-sector.active,.tool-wheel-sector:hover{background:var(--accent-color)}.tool-wheel-sector.active .tool-wheel-label,.tool-wheel-sector:hover .tool-wheel-label{color:#fff}.tool-wheel-sector.active svg,.tool-wheel-sector:hover svg{stroke:#fff}.tool-wheel-label{position:absolute;display:flex;flex-direction:column;align-items:center;gap:2px;font-family:var(--font-family);font-size:.65rem;font-weight:500;color:var(--text-primary);pointer-events:none;-webkit-user-select:none;user-select:none}.tool-wheel-sector[data-pos=top] .tool-wheel-label{top:18%;left:50%;transform:translate(-50%)}.tool-wheel-sector[data-pos=right] .tool-wheel-label{top:50%;right:14%;transform:translateY(-50%)}.tool-wheel-sector[data-pos=bottom] .tool-wheel-label{bottom:18%;left:50%;transform:translate(-50%)}.tool-wheel-sector[data-pos=left] .tool-wheel-label{top:50%;left:8%;transform:translateY(-50%)}.tool-wheel-ring:after{content:"";position:absolute;inset:0;z-index:1;pointer-events:none;background:linear-gradient(to bottom right,transparent calc(50% - .5px),var(--border-color-strong) calc(50% - .5px),var(--border-color-strong) calc(50% + .5px),transparent calc(50% + .5px)),linear-gradient(to top right,transparent calc(50% - .5px),var(--border-color-strong) calc(50% - .5px),var(--border-color-strong) calc(50% + .5px),transparent calc(50% + .5px))}#load-saved-btn.hidden{display:none}.save-status{font-size:.75rem;color:var(--accent-color);display:block;margin-bottom:.5rem}.save-status.hidden{display:none}