:root{--surface:#fff;--canvas:#edf1ef;--text:#243833;--muted:#52665f;--border:#dce4df;--focus:#315f54;--active:#ffbf66;--assumption:#d89a36;--conflict:#b64242;--header:56px;--sidebar:280px;--footer:24px;font-synthesis:none;color:var(--text);background:var(--canvas);font-family:Segoe UI,Microsoft YaHei,sans-serif;font-size:13px}*{box-sizing:border-box}html,body{width:100%;height:100%;margin:0;overflow:hidden}#viewer-root{background:var(--canvas);width:100%;height:100dvh;position:relative;overflow:hidden}#viewer-root:fullscreen{height:100%}button,input,select{font:inherit;color:inherit}button{cursor:pointer;border:1px solid var(--border);background:var(--surface);white-space:nowrap;border-radius:6px;min-height:36px;padding:8px 12px}button:hover{background:#f3f6f4}button:disabled{opacity:.45;cursor:not-allowed}button.active{background:var(--active);border-color:var(--active);color:var(--text)}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible,[tabindex]:focus-visible{outline:2px solid var(--focus);outline-offset:2px}button[hidden],[hidden]{display:none!important}button svg,.brand-mark{fill:none;stroke:currentColor;stroke-width:1.6px;stroke-linecap:round;stroke-linejoin:round;flex:none;width:18px;height:18px}input[type=checkbox]{width:16px;height:16px;accent-color:var(--focus);flex:none;margin:0}input[type=range]{accent-color:var(--focus);width:100%}select{border:1px solid var(--border);background:var(--surface);border-radius:6px;min-width:0;height:38px;padding:0 8px}a{color:var(--focus);text-underline-offset:3px}h1,h2,h3,p{margin:0}h2,h3{font-size:13px;font-weight:600}::selection{background:var(--active);color:var(--text)}.fine,.count{color:var(--muted);font-size:12px;line-height:1.6}.fine{margin-top:8px}.count{white-space:nowrap;font-variant-numeric:tabular-nums}.icon-button{justify-content:center;align-items:center;gap:8px;width:38px;min-width:38px;height:38px;padding:8px;display:inline-flex}.labelled-tool{width:auto}.topbar{height:var(--header);background:var(--surface);border-bottom:1px solid var(--border);z-index:25;align-items:center;gap:12px;padding:0 16px;display:flex;position:relative}.identity{flex:1;align-items:center;gap:12px;min-width:0;display:flex}.brand-mark{width:28px;height:28px;color:var(--focus)}#project-title{white-space:nowrap;text-overflow:ellipsis;font-size:16px;font-weight:600;overflow:hidden}.review-tag{white-space:nowrap;border:1px solid var(--border);color:var(--muted);border-radius:6px;padding:4px 8px;font-size:12px}.top-tools{flex:none;align-items:center;gap:8px;display:flex}.mode-switch{border:1px solid var(--border);background:#f7f9f7;border-radius:6px;gap:2px;padding:2px;display:flex}.mode-switch button{background:0 0;border:0;min-height:32px;padding:8px 16px}.mode-switch button.active{background:var(--active)}.menu-toggle{display:none}.workspace{top:var(--header);bottom:var(--footer);isolation:isolate;display:flex;position:absolute;left:0;right:0}.sidebar{width:var(--sidebar);background:var(--surface);border-right:1px solid var(--border);overscroll-behavior:contain;z-index:20;scrollbar-width:thin;scrollbar-color:#c4d0c8 transparent;flex:none;padding:16px;overflow:auto}.panel-section{border-bottom:1px solid var(--border);padding:16px 0}.panel-section:first-of-type{padding-top:0}.panel-section:last-child{border-bottom:0}.panel-section h2{margin-bottom:8px}.section-heading{justify-content:space-between;align-items:center;gap:8px;font-weight:600;display:flex}.section-heading h2{margin:0}.status-box{border-left:3px solid var(--assumption);background:#fbf8f1;margin-top:8px;padding:12px;line-height:1.6}.status-box strong,.status-box p{font-size:12px}.status-box p{color:var(--muted);margin-top:4px}.text-button{color:var(--focus);background:0 0;border:0;min-height:36px;padding:8px 0;font-size:12px}.text-button:hover{background:0 0;text-decoration:underline}.full-select{width:100%;margin:8px 0 12px}.checkline{cursor:pointer;align-items:center;gap:8px;min-height:36px;font-size:13px;line-height:1.5;display:flex}.source-legend{color:var(--muted);flex-direction:column;gap:8px;margin-top:12px;font-size:12px;line-height:1.5;display:flex}.swatch{border-radius:2px;width:8px;height:8px;margin-right:8px;display:inline-block}.swatch.assumed{background:var(--assumption)}.swatch.conflict{background:var(--conflict)}.row-tools{justify-content:space-between;gap:8px;display:flex}.count-help{margin:4px 0 8px}.tree{margin:0 -8px}.tree-node{margin:0}.tree-row{border-radius:6px;align-items:center;gap:4px;min-height:36px;padding:0 4px;display:flex}.tree-row:hover{background:#f3f6f4}.tree-row.selected{box-shadow:inset 3px 0 var(--focus);background:#e8efeb}.tree-row.filtered .tree-name{color:var(--muted)}.tree-row.selected .tree-name{font-weight:600}.tree-toggle{background:0 0;border:0;place-items:center;width:24px;min-width:24px;min-height:36px;padding:4px;font-size:14px;display:grid}.tree-toggle svg{width:12px;height:12px;transition:transform .12s}.tree-toggle[aria-expanded=true] svg{transform:rotate(90deg)}.tree-check{cursor:pointer;justify-content:center;align-items:center;min-width:24px;min-height:36px;display:flex}.tree-name{text-align:left;text-overflow:ellipsis;white-space:nowrap;background:0 0;border:0;flex:1;min-width:0;padding:8px 4px;font-size:12px;overflow:hidden}.tree-name:hover{background:0 0}.tree-group-name{font-weight:600}.tree-children{margin:0;padding:0 0 0 16px}.tree-leaf .tree-row{padding-left:8px}.tree-selected-mark{color:var(--focus);font-size:12px}.tree-focus{opacity:0;background:0 0;border:0;width:28px;min-width:28px;min-height:36px;padding:4px}.tree-row:hover .tree-focus,.tree-row:focus-within .tree-focus,.tree-row.selected .tree-focus{opacity:1}.tree-focus svg{width:15px;height:15px}.help-list{grid-template-columns:auto 1fr;gap:8px;margin:12px 0 0;font-size:12px;display:grid}.help-list dt{color:var(--muted)}.help-list dd{text-align:right;margin:0}.panel-section summary{cursor:pointer;font-size:12px;font-weight:600}.drawer-heading{background:var(--surface);z-index:2;justify-content:space-between;align-items:center;gap:12px;padding:0 0 12px;display:flex;position:sticky;top:-16px}.drawer-heading h2{font-size:14px}.drawer-heading .icon-button{border:0;font-size:22px}.sidebar-heading{display:none}#viewport{background:var(--canvas);flex:1;min-width:0;position:relative;overflow:hidden}#canvas-container{position:absolute;inset:0}canvas{touch-action:none;width:100%;height:100%;display:block}.viewport-meta{pointer-events:none;flex-direction:column;gap:4px;display:flex;position:absolute;top:24px;left:24px}.viewport-meta strong{font-size:13px;font-weight:600}.viewport-meta span,.mode-indicator{color:var(--muted);font-size:12px}.mode-indicator{pointer-events:none;position:absolute;top:24px;right:24px}.mode-indicator:before{content:"";background:var(--focus);border-radius:50%;width:6px;height:6px;margin-right:8px;display:inline-block}.view-toolbar{background:var(--surface);border:1px solid var(--border);white-space:nowrap;scrollbar-width:thin;scrollbar-color:#c4d0c8 transparent;border-radius:8px;align-items:center;gap:0;max-width:calc(100% - 32px);padding:4px;display:flex;position:absolute;bottom:16px;left:50%;overflow:auto hidden;transform:translate(-50%);box-shadow:0 4px 16px #2438330a}.view-toolbar button{border:0;flex:none;justify-content:center;align-items:center;gap:4px;padding:8px 12px;font-size:12px;display:flex}.separator{background:var(--border);flex:none;width:1px;height:20px;margin:0 4px}.viewport-footer{height:var(--footer);border-top:1px solid var(--border);z-index:25;color:var(--muted);background:#f9fbf9;justify-content:space-between;align-items:center;gap:16px;padding:0 16px;font-size:12px;display:flex;position:absolute;bottom:0;left:0;right:0}#controls-hint{white-space:nowrap;text-overflow:ellipsis;min-width:0;overflow:hidden}.footer-status{white-space:nowrap;font-variant-numeric:tabular-nums;gap:12px;display:flex}.data-panel{background:var(--surface);border-left:1px solid var(--border);overscroll-behavior:contain;z-index:22;scrollbar-width:thin;flex:none;width:320px;padding:16px;position:relative;overflow:auto}.detail-title{overflow-wrap:anywhere;margin:8px 0 16px;font-size:18px;line-height:1.4}.detail-list{margin:0;font-size:13px}.detail-list dt{color:var(--muted);margin-top:16px;font-size:12px}.detail-list dd{overflow-wrap:anywhere;margin:4px 0 0;line-height:1.65}.status-tags{flex-wrap:wrap;gap:4px;margin:8px 0;display:flex}.status-tag{color:#745018;background:#fbf0db;border-radius:6px;padding:4px 8px;font-size:12px}.status-tag.CONFIRMED{color:var(--focus);background:#e8efeb}.status-tag.CONFLICT{color:#963535;background:#f7e6e6}.dimension-field{border-top:1px solid var(--border);margin-top:12px;padding:12px 0}.dimension-heading{justify-content:space-between;gap:8px;line-height:1.5;display:flex}.dimension-heading strong{font-size:13px}.dimension-heading span{font-variant-numeric:tabular-nums;text-align:right;font-size:13px}.dimension-field .fine{margin-top:4px}.source-details{margin-top:8px}.source-details summary{cursor:pointer;color:var(--focus);align-items:center;gap:8px;min-height:32px;font-size:12px;display:flex}.source-details summary:before{content:"▸"}.source-details[open] summary:before{content:"▾"}.source-details .detail-list dt{margin-top:8px}.source-details .detail-list dd{font-size:12px}.drawing-link{min-height:36px;padding:8px 0;font-size:12px;display:inline-block}.detail-heading{margin-top:24px}.detail-notice{color:var(--muted);background:#f3f6f4;border-radius:6px;padding:12px;font-size:12px;line-height:1.6}#metadata-warnings{overflow-wrap:anywhere}.empty-state{text-align:center;border:1px solid var(--border);background:#fffffff2;border-radius:8px;width:min(340px,100% - 32px);padding:24px;position:absolute;top:45%;left:50%;transform:translate(-50%,-50%)}.empty-state p{color:var(--muted);margin:8px 0 16px;font-size:12px;line-height:1.6}#loading,#error-panel{z-index:15;background:var(--canvas);text-align:center;flex-direction:column;justify-content:center;align-items:center;gap:16px;padding:24px;display:flex;position:absolute;inset:0}#loading strong,#error-panel strong{font-size:18px;font-weight:600}#loading-progress,#error-panel p{color:var(--muted);overflow-wrap:anywhere;max-width:48ch;font-size:13px;line-height:1.6}progress{width:180px;height:4px;accent-color:var(--focus)}.loading-symbol{border:2px solid var(--border);border-top-color:var(--focus);border-radius:50%;width:32px;height:32px;animation:1s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}#retry{background:var(--focus);color:#fff}.walk-banner{border:1px solid var(--border);pointer-events:none;z-index:4;text-align:center;background:#ffffffed;border-radius:6px;width:min(460px,100% - 32px);padding:12px 16px;font-size:12px;line-height:1.6;position:absolute;top:72px;left:50%;transform:translate(-50%)}.walk-banner p{color:var(--muted);margin-top:4px}#walk-crosshair{color:var(--focus);pointer-events:none;font-size:24px;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)}#toast{background:var(--focus);color:#fff;z-index:24;text-align:center;pointer-events:none;border-radius:6px;max-width:calc(100% - 32px);padding:12px 16px;font-size:13px;line-height:1.5;position:absolute;bottom:88px;left:50%;transform:translate(-50%)}.drawer-backdrop{z-index:19;background:#24383335;position:absolute;inset:0}#settings-dialog{border:1px solid var(--border);width:360px;max-width:calc(100vw - 32px);max-height:calc(100dvh - 88px);color:var(--text);background:var(--surface);border-radius:8px;margin:72px 16px 16px auto;padding:0;position:fixed;box-shadow:0 16px 40px #24383325}#settings-dialog::backdrop{background:#24383335}.dialog-inner{padding:16px;overflow:auto}.settings-group{border:1px solid var(--border);border-radius:6px;margin-top:16px}.settings-group>summary{cursor:pointer;min-height:40px;padding:12px;font-weight:600}.settings-fields{flex-direction:column;gap:8px;padding:0 12px 12px;display:flex}.setting-row{justify-content:space-between;align-items:center;gap:12px;display:flex}.setting-range{grid-template-columns:1fr auto;gap:8px;margin-top:8px;font-size:13px;display:grid}.setting-range input{grid-column:1/-1}.setting-range output{color:var(--muted);font-variant-numeric:tabular-nums;font-size:12px}.reset-settings{width:100%;margin-top:16px}.visually-hidden{clip:rect(0,0,0,0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}@media (min-width:1200px){.drawer-backdrop{display:none}.sidebar{transform:none!important}}@media (min-width:768px) and (max-width:1199px){.topbar{padding:0 12px}.menu-toggle{display:inline-flex}.tool-label,.review-tag{display:none}.labelled-tool{width:38px}.sidebar{display:none}.sidebar.open{display:block}.sidebar-heading{display:flex}.top-tools{gap:4px}.mode-switch button{padding:8px 12px}.data-panel{width:300px}.view-toolbar button{padding:8px}.viewport-meta{top:16px;left:16px}.mode-indicator{top:16px;right:16px}}@media (max-width:767px){:root{--header:112px}.topbar{height:var(--header);flex-wrap:wrap;align-content:center;gap:4px 8px;padding:8px 12px}.identity{flex:none;width:calc(100% - 52px)}.brand-mark{width:24px;height:24px}.review-tag{margin-left:auto;padding:4px}.menu-toggle{display:inline-flex}.top-tools{scrollbar-width:none;justify-content:space-between;gap:4px;width:100%;overflow-x:auto}.top-tools>*{flex-shrink:0}.tool-label{display:none}.labelled-tool{width:44px}.mode-switch{gap:0;padding:0}.mode-switch button{min-height:44px;padding:8px 10px}.top-tools select{max-width:96px;height:44px}.sidebar{border-radius:0 8px 8px 0;width:min(310px,100% - 32px);transition:transform .15s;position:absolute;top:0;bottom:0;left:0;transform:translate(-100%);box-shadow:4px 0 24px #24383314}.sidebar.open{transform:none}.sidebar-heading{display:flex}.data-panel{border-radius:8px 0 0 8px;width:min(330px,100% - 16px);position:absolute;top:0;bottom:0;right:0;box-shadow:-4px 0 24px #24383314}.viewport-meta{top:16px;left:16px}.mode-indicator{top:16px;right:16px}.view-toolbar{max-width:calc(100% - 24px);bottom:16px}.view-toolbar button{min-height:44px;padding:8px 12px}.viewport-footer{gap:8px;padding:0 12px}.footer-status{gap:8px}#performance{display:none}.walk-banner{top:64px}#settings-dialog{max-height:calc(100dvh - 32px);margin:16px auto}button,.icon-button,.tree-toggle,.tree-check,.tree-focus{min-width:44px;min-height:44px}.tree-row{gap:0;min-height:44px;padding:0}.tree-children{padding-left:8px}.tree-leaf .tree-row{padding-left:0}.tree-focus{opacity:1}.tree-name{padding:8px 4px}.tree-check input{width:18px;height:18px}.checkline,.drawing-link,.source-details summary{min-height:44px}.tree .count{font-size:12px}.footer-status #footer-count{text-overflow:ellipsis;max-width:160px;overflow:hidden}}@media (max-width:370px){.review-tag,.brand-mark{display:none}.topbar{padding:8px}.top-tools{gap:2px}.mode-switch button{padding:8px}.top-tools select{width:88px;padding:0 4px}.top-tools .icon-button{width:44px;padding:8px}.footer-status #footer-count{max-width:116px}}@media (pointer:coarse){button,.icon-button,select{min-width:44px;min-height:44px}.mode-switch button{min-height:44px}.topbar{height:max(var(--header),56px)}.tree-row,.checkline{min-height:44px}.tree-toggle,.tree-check,.tree-focus{min-width:44px;min-height:44px}.tree-focus{opacity:1}.tree-name{padding:8px 4px}.tree-check input{width:18px;height:18px}.view-toolbar button,.drawing-link{min-height:44px}}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition:none!important;animation-duration:.001ms!important;animation-iteration-count:1!important}}#walk-availability{border:1px solid var(--border);background:#ffffffe6;border-radius:6px;max-width:min(340px,100vw - 64px);margin-top:8px;padding:8px 12px;line-height:1.5;display:block}#error-message{white-space:pre-line}@media (min-width:768px) and (pointer:fine){.mode-switch button{min-height:36px}}@media (max-width:767px),(pointer:coarse){#viewer-root button,#viewer-root select,#viewer-root summary,#viewer-root input[type=range],#viewer-root .tree-check,#viewer-root .checkline,#viewer-root a[href]{min-width:44px;min-height:44px}#viewer-root summary{padding-top:12px;padding-bottom:12px}#viewer-root a[href]{align-items:center;display:inline-flex}}.tree-row.selected{color:var(--focus);box-shadow:inset 3px 0 var(--focus);background:#fff0d8}.tree-row.selected .tree-name{color:var(--focus)}.tree-name .tree-label{text-overflow:ellipsis;white-space:nowrap;display:block;overflow:hidden}.tree-visibility{white-space:normal;color:var(--muted);margin-top:4px;font-size:12px;line-height:1.5;display:block}.visibility-notice,.isolation-status{border:1px solid var(--border);color:var(--text);background:#fff0d8;border-radius:6px;margin-top:12px;padding:12px;font-size:12px;line-height:1.6}.isolation-status strong{overflow-wrap:anywhere;font-weight:600;display:block}.isolation-status .text-button{margin-top:4px;display:block}.component-menu{z-index:100;border:1px solid var(--border);background:var(--surface);overscroll-behavior:contain;border-radius:8px;width:264px;padding:4px;position:fixed;overflow:auto;box-shadow:0 8px 28px #24383326}.component-menu-title{border-bottom:1px solid var(--border);overflow-wrap:anywhere;margin-bottom:4px;padding:8px 12px 12px;font-size:13px;line-height:1.5}.component-menu-title strong,.component-menu-title span{display:block}.component-menu-title span{color:var(--muted);margin-top:4px;font-size:12px}.component-menu [role=menuitem]{text-align:left;white-space:normal;border:0;flex-direction:column;justify-content:center;align-items:flex-start;width:100%;min-height:36px;line-height:1.5;display:flex}.component-menu [role=menuitem]:focus{outline:2px solid var(--focus);outline-offset:-2px;background:#fff0d8}.component-menu [role=menuitem]:disabled{opacity:1;color:var(--muted);background:#f3f6f4}.component-menu-note{margin-top:4px;font-size:12px;line-height:1.5}@media (min-width:768px) and (max-width:1199px){.sidebar.selection-drawer{border-radius:0 8px 8px 0;width:280px;display:block;position:absolute;top:0;bottom:0;left:0;box-shadow:4px 0 24px #24383314}}