:root{--bg-app: #f1f2f3;--bg-header: #ffffff;--bg-toolbar: #f1f2f3;--bg-panel: #ffffff;--bg-panel-2: #f6f7f8;--bg-hover: #e6e8ea;--bg-active: #dbdfe2;--border: #d8dadc;--border-strong: #b9bcbf;--text: #212529;--text-dim: #6c7176;--icon: #4a4f54;--accent: #2f6fed;--accent-hover: #2358c4;--accent-geo: #2f6fed;--selection-blue: #cfe4f7;--tooltip-title: #d3e2f7;--tooltip-body-bg: #fafbfc;--tooltip-title-text: #3c5068;--info-bg: #dbe9f8;--info-border: #9fc2e6;--info-text: #2b4a66;--info-icon: #2f6fed;--ok: #1f9d55;--warn: #df8a1c;--danger: #d63b3b;--accent-2: #ef7f1a;--font: "Segoe UI", "Source Sans Pro", system-ui, -apple-system, sans-serif}@media (prefers-color-scheme: dark){:root:not([data-theme=light]){--bg-app: #2b2d2e;--bg-header: #262829;--bg-toolbar: #2b2d2e;--bg-panel: #232526;--bg-panel-2: #2e3031;--bg-hover: #3a3d3f;--bg-active: #45494c;--border: #3c3f41;--border-strong: #55595c;--text: #d6d8da;--text-dim: #8b8f93;--icon: #b3b7ba;--accent: #4a86ff;--accent-hover: #6b9dff;--accent-geo: #4a86ff;--selection-blue: #2c4a68;--tooltip-title: #2a3a52;--tooltip-body-bg: #2e3031;--tooltip-title-text: #b9cce6;--info-bg: #22344a;--info-border: #3f5f80;--info-text: #b9cce6;--info-icon: #4a86ff;--ok: #35c46b;--warn: #f0a84a;--danger: #ff6060;--accent-2: #ff9a3d}}:root[data-theme=dark]{--bg-app: #2b2d2e;--bg-header: #262829;--bg-toolbar: #2b2d2e;--bg-panel: #232526;--bg-panel-2: #2e3031;--bg-hover: #3a3d3f;--bg-active: #45494c;--border: #3c3f41;--border-strong: #55595c;--text: #d6d8da;--text-dim: #8b8f93;--icon: #b3b7ba;--accent: #4a86ff;--accent-hover: #6b9dff;--accent-geo: #4a86ff;--selection-blue: #2c4a68;--tooltip-title: #2a3a52;--tooltip-body-bg: #2e3031;--tooltip-title-text: #b9cce6;--info-bg: #22344a;--info-border: #3f5f80;--info-text: #b9cce6;--info-icon: #4a86ff;--ok: #35c46b;--warn: #f0a84a;--danger: #ff6060;--accent-2: #ff9a3d}.theme-toggle{width:26px;height:26px;border:1px solid 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ease}input[type=checkbox],input[type=radio],input[type=range],input[type=color],input[type=file]{background:transparent;border:none}input:focus,select:focus,textarea:focus{outline:none;border-color:var(--accent)}select option{background:var(--bg-panel);color:var(--text)}*{box-sizing:border-box}html,body,#app{height:100%;margin:0}body{background:var(--bg-app);color:var(--text);font-family:var(--font);font-size:13px;overflow:hidden}button{font-family:inherit;font-size:inherit}::-webkit-scrollbar{width:10px;height:10px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--border-strong);border-radius:5px;border:2px solid var(--bg-panel)}.app-shell{display:grid;grid-template-rows:auto auto 1fr auto auto;height:100%}.studio-bar{display:flex;align-items:stretch;gap:2px;height:30px;padding:0 6px;background:var(--bg-header);border-top:1px solid var(--border);flex-shrink:0}.studio-tab{display:inline-flex;align-items:center;gap:6px;padding:0 12px;background:transparent;border:none;border-top:2px solid transparent;color:var(--text-dim);font:inherit;font-size:12.5px;cursor:pointer}.studio-tab .studio-ico{display:inline-flex;color:var(--text-dim)}.studio-tab:hover{background:var(--bg-hover);color:var(--text)}.studio-tab.active{background:var(--bg-panel);color:var(--text);border-top-color:var(--accent)}.studio-tab.active .studio-ico{color:var(--accent)}.studio-add{width:26px;background:transparent;border:none;color:var(--text-dim);font-size:17px;line-height:1;cursor:pointer;border-radius:4px}.studio-add:hover{background:var(--bg-hover);color:var(--text)}.studio-menu{position:fixed;z-index:60;background:var(--bg-panel);border:1px solid var(--border);border-radius:6px;box-shadow:0 6px 20px #0000004d;padding:4px;min-width:180px}.studio-menu-item{display:block;width:100%;text-align:left;padding:7px 10px;background:transparent;border:none;color:var(--text);font:inherit;font-size:12.5px;border-radius:4px;cursor:pointer}.studio-menu-item:hover{background:var(--bg-hover)}.header-bar{display:flex;align-items:center;gap:10px;padding:0 10px;height:34px;background:var(--bg-header);border-bottom:1px solid var(--border);flex-shrink:0}.header-bar .brand{display:flex;align-items:center;gap:7px;font-weight:600;font-size:14px;color:var(--text);white-space:nowrap}.header-bar .brand .brand-mark{width:18px;height:18px;border-radius:4px;background:#29a644;color:#fff;display:inline-flex;align-items:center;justify-content:center;font-size:11px}.header-bar .doc-meta{color:var(--text-dim);font-size:12.5px}.header-bar .menu{display:flex;gap:2px}.header-bar .menu button{background:transparent;border:none;color:var(--text);padding:5px 10px;border-radius:4px;cursor:pointer}.header-bar .menu button:hover:not(:disabled){background:var(--bg-hover)}.header-bar .menu button:disabled{color:var(--text-dim);cursor:default}.header-bar .spacer{flex:1}.topbar{display:flex;align-items:center;padding:0 8px;height:40px;background:var(--bg-toolbar);border-bottom:1px solid var(--border);flex-shrink:0}.topbar .actions{display:flex;gap:2px;align-items:center;width:100%;overflow-x:auto;overflow-y:hidden;scrollbar-width:thin}.topbar .actions::-webkit-scrollbar{height:6px}.topbar .actions::-webkit-scrollbar-thumb{background:var(--border-strong);border-radius:3px}.topbar.sketch-mode{box-shadow:inset 0 -2px 0 var(--accent-geo)}.toolbar-sep{width:1px;height:24px;background:var(--border-strong);margin:0 6px;flex-shrink:0}.tool-wrap{position:relative;display:flex;align-items:center}.icon-btn{width:30px;height:30px;display:inline-flex;align-items:center;justify-content:center;background:transparent;border:none;border-radius:3px;color:var(--icon);cursor:pointer;padding:0}.icon-btn 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#00000047;padding:5px;display:flex;flex-direction:column;gap:2px}.quick-menu-title{font-size:11px;font-weight:600;color:var(--text-muted, #8a9098);padding:4px 8px 2px;text-transform:uppercase;letter-spacing:.04em}.quick-menu-empty{font-size:12px;color:var(--text-muted, #8a9098);padding:6px 8px 8px}.quick-menu-grid{display:grid;grid-template-columns:repeat(5,36px);gap:3px}.quick-menu-icon{width:36px;height:36px;display:flex;align-items:center;justify-content:center;background:transparent;border:1px solid transparent;border-radius:4px;color:var(--text);cursor:pointer}.quick-menu-icon:hover{background:var(--bg-hover, var(--bg-panel-2));border-color:var(--border-strong)}.quick-menu-icon svg{width:18px;height:18px}.quick-menu-fallback{font-size:13px;font-weight:600}.tool-key{opacity:.75;font-size:11.5px;border:1px solid var(--border-strong);background:var(--bg-panel);color:var(--text-dim);border-radius:3px;padding:0 4px;line-height:15px}.tool-btn.primary .tool-key,.tool-btn.finish .tool-key{background:transparent;color:inherit;border-color:#fff9}.tool-flyout-menu,.flyout-menu{position:absolute;top:100%;left:0;margin-top:2px;background:var(--bg-panel);border:1px solid var(--border);border-radius:3px;min-width:190px;z-index:30;box-shadow:0 4px 14px #0000002e;padding:3px 0}.flyout-item{display:flex;align-items:center;gap:9px;width:100%;text-align:left;padding:7px 12px;background:none;border:none;color:var(--text);cursor:pointer}.flyout-item:hover,.flyout-item.selected{background:var(--bg-active)}.flyout-item svg{width:18px;height:18px;flex-shrink:0;color:var(--icon)}.flyout-item .flyout-label{flex:1}.flyout-item .tool-key{margin-left:auto}.os-tooltip{position:fixed;z-index:90;min-width:220px;max-width:420px;border:1px solid var(--border);box-shadow:0 3px 10px #00000029;pointer-events:none;font-size:12.5px}.os-tooltip .tt-title{background:var(--tooltip-title);color:var(--tooltip-title-text);font-weight:600;padding:5px 10px}.os-tooltip .tt-body{background:var(--tooltip-body-bg);color:var(--text-dim);padding:6px 10px}.search-box{margin-left:auto;display:flex;align-items:center;gap:6px;background:transparent;border:none;color:var(--text-dim);padding:5px 8px;border-radius:3px;cursor:pointer;white-space:nowrap;flex-shrink:0}.search-box:hover{background:var(--bg-hover)}.kbd-badge{background:var(--bg-panel-2);border:1px solid var(--border-strong);border-radius:3px;color:var(--text-dim);font-size:11.5px;padding:0 4px;line-height:15px}.main{display:grid;grid-template-columns:36px 230px 1fr;min-height:0}.main.tree-collapsed{grid-template-columns:36px 0 1fr}.main.tree-collapsed .panel.left{overflow:hidden;min-width:0;border-right:none}.side-rail{display:flex;flex-direction:column;align-items:center;gap:2px;padding:6px 0;background:var(--bg-panel);border-right:1px solid var(--border)}.rail-btn{width:28px;height:28px;display:inline-flex;align-items:center;justify-content:center;background:transparent;border:none;border-radius:3px;color:var(--icon);cursor:pointer;padding:0}.rail-btn:hover{background:var(--bg-hover)}.rail-btn.active{background:var(--bg-active)}.rail-spacer{flex:1}.view-strip{position:absolute;right:0;top:50%;transform:translateY(-50%);display:flex;flex-direction:column;gap:1px;z-index:5;background:var(--bg-panel);border:1px solid var(--border);border-right:none;border-radius:3px 0 0 3px;padding:2px}.strip-btn{width:26px;height:26px;display:inline-flex;align-items:center;justify-content:center;background:transparent;border:none;border-radius:3px;color:var(--icon);cursor:pointer;padding:0}.strip-btn:hover{background:var(--bg-hover)}.strip-btn.active{background:var(--bg-active)}.layer-panel{position:absolute;bottom:12px;left:50%;transform:translate(-50%);width:300px;background:var(--bg-panel);border:1px solid var(--border);border-radius:8px;box-shadow:0 6px 20px #00000047;z-index:15;padding:8px 10px;font-size:12px}.layer-panel-title{font-weight:600;display:flex;align-items:center;justify-content:space-between;margin-bottom:6px}.layer-panel-close{background:transparent;border:none;color:var(--icon);cursor:pointer;font-size:13px;padding:0 2px}.layer-panel-close:hover{color:var(--text)}.layer-panel-row{display:flex;align-items:center;gap:6px;margin:4px 0}.layer-panel-row label{flex:0 0 auto;color:var(--text-dim)}.layer-panel-num{width:64px;background:var(--bg-panel-2);border:1px solid var(--border);border-radius:4px;color:var(--text);padding:2px 4px}.layer-panel-unit{color:var(--text-dim)}.layer-panel-slider{flex:1 1 auto;width:100%}.layer-panel-info{color:var(--text-dim);margin-top:4px;text-align:center}.props-float{position:absolute;top:8px;left:8px;width:234px;max-height:calc(100% - 16px);overflow-y:auto;background:var(--bg-panel);border:1px solid var(--border);border-radius:8px;box-shadow:0 6px 20px #00000047;z-index:15}.props-float:empty{display:none}.panel{background:var(--bg-panel);border-right:1px solid var(--border);overflow-y:auto;min-height:0}.panel.right{border-right:none;border-left:1px solid var(--border)}.panel h3{font-size:11px;text-transform:uppercase;letter-spacing:.06em;color:var(--text-dim);padding:10px 12px 6px;margin:0}.tree-item{display:flex;align-items:center;gap:6px;padding:5px 12px;cursor:pointer;white-space:nowrap}.tree-item:hover{background:var(--bg-hover)}.tree-item.selected{background:var(--selection-blue)}.tree-item.contains-selection{box-shadow:inset 3px 0 0 var(--accent);background:color-mix(in srgb,var(--accent) 12%,transparent)}.tree-item.face-origin{box-shadow:inset 3px 0 0 var(--accent);background:color-mix(in srgb,var(--accent) 22%,transparent)}.tree-item.multiselect{background:color-mix(in srgb,var(--selection-blue) 70%,transparent)}.tree-item .tree-expander{width:12px;margin-left:-4px;flex-shrink:0;text-align:center;font-size:10px;color:#7a8590;cursor:pointer;-webkit-user-select:none;user-select:none}.tree-item .tree-expander:hover{color:var(--text)}.tree-item.drop-target{box-shadow:inset 0 0 0 2px var(--accent);background:color-mix(in srgb,var(--accent) 12%,transparent)}.tree-item.folder-header{font-weight:600}.tree-item .icon{width:16px;text-align:center;color:#5f6b76;flex-shrink:0}.tree-item .icon svg{width:14px;height:14px;vertical-align:-2px}.tree-item .icon{position:relative}.tree-item .underdefined-mark{position:absolute;right:-3px;bottom:-3px;font-size:11px;font-weight:700;line-height:1;color:#2b6cd4}.tree-item .name{flex:1;overflow:hidden;text-overflow:ellipsis}.tree-item .eye{opacity:.55;cursor:pointer;padding:2px}.tree-item .eye:hover{opacity:1}.tree-item.hidden-feature .name{opacity:.5;font-style:italic}.tree-item.feature-error .name{color:var(--danger)}.tree-item .feature-warn{color:var(--danger);font-size:12px;margin-left:auto;padding-right:4px}.tree-item .feature-warn+.eye{margin-left:0}.tree-empty{padding:10px 12px;color:var(--text-dim);font-size:12px}.parts-head{font-weight:600;font-size:12.5px;padding:10px 12px 4px;margin-top:6px;border-top:1px solid var(--border)}.viewport-wrap{position:relative;min-width:0}#viewport-container{position:absolute;top:0;right:0;bottom:0;left:0}.marquee{position:absolute;pointer-events:none;border:1px solid var(--accent);background:#2f6fed1f;z-index:5}.marquee.crossing{border-style:dashed;border-color:var(--ok);background:#1f9d551f}#viewport-container canvas{display:block}.view-cube{position:absolute;top:12px;right:12px;z-index:5}.hint-banner{position:absolute;top:10px;left:50%;transform:translate(-50%);max-width:480px;background:var(--info-bg);border:1px solid var(--info-border);color:var(--info-text);padding:7px 12px;border-radius:3px;font-size:12.5px;pointer-events:none;box-shadow:0 2px 8px #0000001f}.hint-banner:before{content:"ⓘ ";color:var(--info-icon);font-weight:600}.props-panel{padding:0}.props-panel .dialog-titlebar{display:flex;align-items:center;border-bottom:1px solid var(--border);padding:0 0 0 12px;height:36px}.props-panel .dialog-titlebar h3{flex:1;margin:0;padding:0;font-size:13px;font-weight:600;color:var(--text);text-transform:none;letter-spacing:0}.props-panel .dialog-titlebar h3.invalid{color:var(--danger)}.op-tabs{display:flex;gap:14px;border-bottom:1px solid var(--border)}.op-tab{background:none;border:none;padding:6px 2px 7px;color:var(--text-dim);cursor:pointer;border-bottom:2px solid transparent;margin-bottom:-1px;font-size:12.5px}.op-tab:hover{color:var(--text)}.op-tab.active{color:var(--accent);border-bottom-color:var(--accent);font-weight:600}.input-unit{display:flex;align-items:center;gap:8px}.input-unit input{flex:1}.input-unit .unit{color:var(--text-dim);font-size:12px}.merge-select{width:100%;background:var(--bg-panel-2);border:1px solid var(--border);color:var(--text);padding:6px 8px;border-radius:3px}.merge-select:focus{outline:none;border-color:var(--accent)}.icon-confirm,.icon-cancel{width:36px;height:36px;border:none;cursor:pointer;font-size:15px;display:inline-flex;align-items:center;justify-content:center}.icon-confirm{background:var(--ok);color:#fff}.icon-confirm:hover:not(:disabled){background:#278a3b}.icon-confirm:disabled{background:#a8c9b0;cursor:not-allowed}.icon-cancel{background:transparent;color:var(--danger);font-weight:700}.icon-cancel:hover{background:color-mix(in srgb,var(--danger) 18%,transparent)}.props-panel .dialog-body{padding:12px}.props-panel .field{margin-bottom:12px}.props-panel label{display:block;font-size:11.5px;color:var(--text-dim);margin-bottom:4px}.props-panel input[type=number],.props-panel input[type=text]{width:100%;background:var(--bg-panel-2);border:1px solid var(--border);color:var(--text);padding:6px 8px;border-radius:3px}.props-panel input:focus{outline:none;border-color:var(--accent)}.segmented{display:flex;border:1px solid var(--border);border-radius:3px;overflow:hidden}.segmented button{flex:1;background:var(--bg-panel-2);border:none;color:var(--text);padding:6px 4px;cursor:pointer;border-left:1px solid var(--border)}.segmented button:first-child{border-left:none}.segmented button:hover:not(.active):not(:disabled){background:var(--bg-hover)}.segmented button.active{background:var(--accent);color:#fff}.segmented button:disabled{opacity:.4;cursor:not-allowed}.props-actions{display:flex;gap:8px;margin-top:16px}.props-actions .confirm{background:var(--ok);color:#fff;border:none;padding:8px 14px;border-radius:3px;cursor:pointer;font-weight:600;flex:1}.props-actions .confirm:disabled{background:#a8c9b0;cursor:not-allowed}.props-actions .cancel{background:transparent;border:1px solid var(--border-strong);color:var(--text);padding:8px 14px;border-radius:3px;cursor:pointer}.props-empty{padding:16px 12px;color:var(--text-dim);font-size:12px}.props-error{color:var(--danger);font-size:12px;margin-top:6px}.props-info{color:var(--text-dim);font-size:12px;margin-top:6px}.props-hint{color:var(--text-dim);font-size:11px;padding:0 0 12px;line-height:1.4}.region-list{display:flex;flex-direction:column;gap:2px;border:1px solid var(--border);border-radius:4px;padding:4px;max-height:132px;overflow-y:auto;background:var(--bg-panel)}.region-row{display:flex;align-items:center;justify-content:space-between;gap:8px;font-size:12px;padding:3px 6px;border-radius:3px}.region-row:hover{background:var(--bg-hover)}.region-remove{border:none;background:none;color:var(--text-dim);font-size:14px;line-height:1;cursor:pointer;padding:0 2px}.region-remove:hover{color:var(--danger)}.check-row{display:flex;align-items:center;gap:8px;padding:4px 0;cursor:pointer;-webkit-user-select:none;user-select:none}.check-row 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