:root{color-scheme:light;--paper:#f4f5f1;--panel:#fff;--ink:#263c34;--muted:#68756e;--line:#dfe5df;--accent:#315a48;--tint:#e9f0e9;--sidebar:258px;font:14px/1.5 -apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}
*{box-sizing:border-box}
[hidden]{display:none!important}
html,body{margin:0;height:100%;background:var(--paper);color:var(--ink)}
body{overflow:hidden}
button,input,select,a{-webkit-tap-highlight-color:transparent}
button,input,select{font:inherit;color:inherit}
button,a{touch-action:manipulation}
button{cursor:pointer}
a{color:var(--accent)}
button{border:0;background:transparent}
button:disabled{opacity:.35;cursor:default}
button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,[tabindex]:focus-visible{outline:2px solid #587d5f;outline-offset:3px}
button:hover:not(:disabled){background:var(--tint)}
svg{display:block;width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.65;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0}
[data-icon]{display:inline-flex;align-items:center;justify-content:center;flex-shrink:0}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.skip-link{position:fixed;top:-100px;left:16px;z-index:2000;background:white;padding:12px;border-radius:8px}.skip-link:focus{top:8px}
.app-shell{height:100vh;height:100dvh;display:flex;flex-direction:column;padding-top:env(safe-area-inset-top)}
.app-header{height:64px;flex-shrink:0;display:flex;align-items:center;gap:12px;border-bottom:1px solid var(--line);background:var(--panel);padding:0 24px 0 14px}
.brand{display:flex;align-items:center;gap:11px;text-decoration:none;color:var(--ink);min-width:0}
h1{font-size:17px;font-weight:650;letter-spacing:-.5px;white-space:nowrap;margin:0}
.house-mark{width:24px;height:24px;border:5px solid var(--accent);outline:1px solid #315a4840;outline-offset:3px;flex-shrink:0}
.version{font-size:10px;line-height:20px;letter-spacing:.6px;text-transform:uppercase;font-weight:600;background:var(--paper);border:1px solid var(--line);border-radius:5px;padding:0 6px;color:var(--muted)}
.header-actions{display:flex;align-items:center;gap:10px;margin-left:auto}
.icon-button{display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;border-radius:8px;flex-shrink:0}
.action-button{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:40px;padding:8px 13px;border:1px solid var(--line);border-radius:8px;font-size:13px;font-weight:550;text-decoration:none;white-space:nowrap;color:var(--ink);background:var(--panel)}
.action-button:hover{background:var(--tint)}
.action-button.primary{background:var(--accent);color:#fff;border-color:var(--accent)}
.action-button.primary:hover{background:#234532}
#explore-3d[aria-current=true]{background:var(--tint);border-color:#99b39e}
.work-area{display:flex;flex:1;min-height:0;min-width:0}
#browse-dialog{position:static;inset:auto;margin:0;padding:18px 12px 0;width:var(--sidebar);max-width:none;max-height:none;height:100%;flex:0 0 var(--sidebar);border:0;border-right:1px solid var(--line);background:var(--panel);color:var(--ink);overflow:hidden}
#browse-dialog[open]{display:flex;flex-direction:column}
.drawer-heading{display:none}
.search-wrap{display:flex;align-items:center;gap:8px;min-height:40px;padding:0 10px;background:var(--paper);border:1px solid var(--line);border-radius:8px;margin:0 2px 16px}
.search-wrap>span{color:var(--muted)}.search-wrap svg{width:16px;height:16px}
.search-wrap input{width:100%;min-width:0;border:0;background:transparent;outline:0;padding:9px 0;font-size:12px;letter-spacing:.1px}
.search-wrap:focus-within{outline:2px solid #587d5f;outline-offset:2px}
.search-wrap input:focus-visible{outline:0}
.search-wrap kbd{font:11px inherit;border:1px solid #d7ddd6;line-height:18px;width:17px;text-align:center;border-radius:3px;color:var(--muted)}
.library-tabs{display:flex;gap:3px;background:var(--paper);padding:3px;border-radius:8px;margin:0 2px 17px}
.library-tabs button{flex:1;border-radius:6px;min-height:34px;font-size:12px;font-weight:550;color:var(--muted)}
.library-tabs button[aria-pressed=true]{background:var(--panel);color:var(--ink);box-shadow:0 1px 4px #223e2c12}
#view-list{flex:1;min-height:0;overflow:auto;overscroll-behavior:contain;scrollbar-width:thin;padding-bottom:14px}
.nav-group+.nav-group{margin-top:12px}
.group-toggle{display:flex;align-items:center;gap:8px;width:100%;text-align:left;padding:9px 10px;font-size:10px;font-weight:650;letter-spacing:1px;text-transform:uppercase;color:var(--muted);border-radius:6px}
.group-toggle .group-count{margin-left:auto;font-size:10px;letter-spacing:0;font-weight:450}
.group-toggle svg{width:13px;height:13px;transition:transform .15s}
.group-toggle[aria-expanded=true] svg{transform:rotate(90deg)}
.view-link{position:relative;display:flex;gap:10px;align-items:center;width:100%;text-align:left;padding:10px 12px;border-radius:7px;font-size:12px;color:#56675c;min-height:38px;margin:1px 0}
.view-link .view-label{display:flex;flex-direction:column;min-width:0;line-height:1.45}
.view-link .view-label>span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.view-link small{font-size:10px;color:var(--muted);margin-top:2px;font-weight:400}
.view-link .nav-dot{width:5px;height:5px;border-radius:50%;background:#b7c3b8;flex-shrink:0}
.view-link[aria-current=page]{background:var(--tint);color:#23472f;font-weight:600}
.view-link[aria-current=page] .nav-dot{background:#315a48}
.view-link[aria-current=page]::before{content:"";position:absolute;left:0;top:10px;bottom:10px;width:3px;background:#426a4c;border-radius:3px}
.view-link .earlier-dot{width:5px;height:5px;border-radius:50%;background:#af752f;margin-left:auto;flex-shrink:0}
.search-summary{font-size:11px;color:var(--muted);padding:0 10px 10px}
#empty-search{padding:24px 12px;font-size:12px;color:var(--muted)}#empty-search strong{color:var(--ink)}
.text-button{padding:8px 0;text-decoration:underline;text-underline-offset:3px;color:var(--accent)}
.sidebar-footer{display:flex;align-items:center;justify-content:space-between;border-top:1px solid var(--line);min-height:53px;gap:5px;font-size:10px;color:var(--muted);padding:0 3px}
.status-dot{display:inline-block;width:5px;height:5px;background:#6f8e72;border-radius:50%;margin:0 7px 1px 3px}
.sidebar-footer .icon-button{width:32px;height:32px}.sidebar-footer svg{width:15px;height:15px}
.workspace{flex:1;min-width:0;min-height:0;display:flex;flex-direction:column;position:relative}
.view-heading{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:76px;padding:12px 28px;border-bottom:1px solid var(--line);flex-shrink:0;background:#fafbf8}
.view-name{min-width:0}#view-group{font-size:10px;font-weight:500;letter-spacing:.8px;text-transform:uppercase;color:var(--muted)}
#view-title{font-size:17px;line-height:1.4;letter-spacing:-.3px;font-weight:550;margin:2px 0 0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.view-actions{display:flex;align-items:center;gap:8px;flex-shrink:0}.step-controls{display:flex;border-left:1px solid var(--line);padding-left:8px;gap:2px}.step-controls .icon-button{width:32px}
.earlier-badge{font-size:10px;font-weight:550;border:1px solid #dcc6a2;border-radius:20px;padding:4px 9px;color:#805322;background:#f7f0e3;white-space:nowrap}
.drawing-stage{flex:1;min-height:0;position:relative;overflow:hidden}
.viewer{position:absolute;inset:0;display:flex;overflow:auto;overscroll-behavior:contain;touch-action:none;padding:26px 26px 82px;scrollbar-width:thin;background:#eeefea;background-image:radial-gradient(#98a58b24 .6px,transparent .6px);background-size:12px 12px}
.canvas{position:relative;flex-shrink:0;margin:auto;width:100%;line-height:0;box-shadow:0 2px 16px #233b2710;background:#f7f3ec}
.canvas img{display:block;width:100%;height:auto;user-select:none;-webkit-user-drag:none}
.viewer.panning,.viewer.panning *{cursor:grabbing!important}.viewer.panning #item-highlight{display:none}
.canvas-controls{position:absolute;bottom:20px;left:50%;transform:translateX(-50%);display:flex;align-items:center;gap:3px;padding:5px 7px;background:#ffffffed;border:1px solid #dce3d8;border-radius:12px;box-shadow:0 4px 20px #23472f13;backdrop-filter:blur(12px)}
.canvas-controls .icon-button{width:36px;height:36px}.canvas-controls svg{width:18px;height:18px}.control-divider{width:1px;height:22px;background:var(--line);margin:0 5px}
.zoom-control{position:relative}.zoom-control select{width:74px;border:0;background:transparent;cursor:pointer;font-size:12px;font-weight:550;text-align:center;min-height:36px;padding:4px 4px 4px 7px;border-radius:5px}
.view-footer{display:flex;align-items:center;justify-content:space-between;min-height:32px;flex-shrink:0;padding:3px 28px 3px;border-top:1px solid var(--line);font-size:10px;letter-spacing:.1px;color:var(--muted);background:#fafbf8}
#view-position{font-variant-numeric:tabular-nums;white-space:nowrap;margin-left:12px}
#model-frame{border:0;width:100%;height:100%;position:absolute;inset:0}
#image-status{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;flex-direction:column;gap:10px;background:#f4f5f1e8;color:var(--muted);font-size:13px;pointer-events:none}#image-status p{margin:0}#image-status button{pointer-events:auto}
#exit-focus{position:absolute;right:16px;top:16px;z-index:5;box-shadow:0 2px 12px #23472f12}
.focus-mode .app-header,.focus-mode #browse-dialog,.focus-mode .view-heading,.focus-mode .view-footer{display:none!important}
.focus-mode .viewer{padding-top:28px}
.sheet{padding:0;border:1px solid var(--line);border-radius:15px;background:var(--panel);color:var(--ink);width:460px;max-width:calc(100vw - 32px);max-height:min(82dvh,740px);box-shadow:0 22px 90px #1d30222e;overflow:auto}
dialog::backdrop{background:#172d2359;backdrop-filter:blur(3px)}
.sheet-heading{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:17px 18px 12px 24px;border-bottom:1px solid var(--line);position:sticky;top:0;background:white;z-index:2}
.sheet h2{font-size:18px;font-weight:600;letter-spacing:-.3px;margin:0}.sheet-body{padding:20px 24px 24px}.sheet p{margin:0 0 20px;line-height:1.75;color:#526258;font-size:13px}
.design-status{font-size:11px;line-height:1.65;background:var(--paper);padding:12px;border-radius:8px;color:var(--muted)}
.note-links{display:flex;gap:18px;flex-wrap:wrap;margin-top:20px;font-size:12px}
.download-list{padding:10px 14px 20px}.download-section-label{font-size:10px;text-transform:uppercase;letter-spacing:1px;color:var(--muted);padding:14px 12px 5px;font-weight:550}
.download-list a{display:flex;align-items:center;gap:14px;justify-content:space-between;text-decoration:none;color:var(--ink);padding:11px 12px;border-radius:8px;min-height:60px}
.download-list a:hover{background:var(--paper)}.download-list strong{display:block;font-size:13px;font-weight:550}.download-list small{display:block;color:var(--muted);font-size:11px;margin-top:2px}.download-list svg{width:17px;height:17px;color:#738775}
#toast{position:fixed;bottom:25px;left:50%;transform:translateX(-50%);z-index:3000;background:var(--ink);color:white;padding:12px 20px;border-radius:9px;font-size:13px;max-width:calc(100vw - 32px);box-shadow:0 4px 20px #0002}
.noscript{position:fixed;bottom:0;left:0;right:0;background:white;padding:14px;text-align:center;z-index:3000}
@media(min-width:900px){.sidebar-collapsed #browse-dialog{display:none}}
@media(max-width:1100px) and (min-width:900px){:root{--sidebar:236px}.app-header{padding-right:16px}.view-heading{padding-left:20px;padding-right:16px}}
@media(max-width:899px){
 .app-header{height:60px;padding:0 14px 0 8px;gap:8px}.brand{gap:10px}.header-actions{gap:7px}
 #browse-dialog{position:fixed;inset:0 auto 0 0;height:100%;height:100dvh;width:min(340px,90vw);max-width:none;margin:0;padding:calc(8px + env(safe-area-inset-top)) 16px env(safe-area-inset-bottom);border:0;border-right:1px solid var(--line);box-shadow:12px 0 50px #15322120}
 .drawer-heading{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px;padding-left:3px;font-size:17px}.search-wrap{min-height:44px;margin-bottom:12px}.search-wrap input{font-size:16px}.search-wrap kbd{display:none}
 .library-tabs button{min-height:40px;font-size:13px}.group-toggle{min-height:40px;font-size:11px}.view-link{min-height:44px;font-size:13px}.view-link small{font-size:11px}.sidebar-footer{min-height:58px;font-size:11px}.sidebar-footer .icon-button{width:44px;height:44px}
 .view-heading{min-height:70px;padding:10px 18px}.view-footer{padding:4px 18px;min-height:32px}.viewer{padding:20px 20px 82px}.icon-button{width:44px;height:44px}.canvas-controls .icon-button{width:42px;height:42px}.zoom-control select{min-height:42px;font-size:16px;width:88px}
}
@media(max-width:540px){
 .app-header{height:58px;padding-right:10px;gap:5px}h1{font-size:15px;letter-spacing:-.4px}.brand{gap:8px}.house-mark{display:none}.version{font-size:9px;padding:0 4px;line-height:17px}.header-actions{gap:3px}
 .header-actions .action-button{width:42px;height:42px;min-height:42px;padding:0;border-color:transparent}.header-actions .action-button>span:last-child{display:none}.header-actions .primary{border-radius:9px}
 .view-heading{padding:9px 12px;min-height:70px;gap:4px}.view-name{flex:1}#view-title{font-size:15px}.view-actions{gap:0}.view-actions>.icon-button{width:36px}.step-controls{gap:0;padding-left:0;border:0}.step-controls .icon-button{width:30px}
 .earlier-badge{position:absolute;left:12px;top:76px;z-index:3;padding:5px 9px;box-shadow:0 2px 10px #6650270a}
 .viewer{padding:18px 10px 80px}.canvas-controls{bottom:max(13px,env(safe-area-inset-bottom));border-radius:12px}.view-footer{font-size:9px;padding:4px 12px;padding-bottom:max(4px,env(safe-area-inset-bottom))}
 .sheet{position:fixed;inset:auto 0 0;margin:0;width:100%;max-width:none;max-height:85dvh;border-radius:18px 18px 0 0;border-bottom:0;padding-bottom:env(safe-area-inset-bottom)}
 .sheet-heading{padding:13px 14px 10px 20px}.sheet-body{padding:18px 20px 24px}.download-list{padding:6px 12px 20px}
}
@media(max-height:500px) and (max-width:899px){.app-header{height:48px}.view-heading{min-height:48px;padding:4px 14px}#view-group{display:none}.view-footer{display:none}.viewer{padding:8px 12px 60px}.canvas-controls{bottom:8px;padding:2px 5px}.canvas-controls .icon-button{height:36px}.earlier-badge{top:53px}.sheet{max-height:94dvh}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}
@media print{body{overflow:visible}.app-shell{height:auto}.app-header,#browse-dialog,.view-actions,.canvas-controls,.view-footer,dialog,#item-tooltip,#item-highlight{display:none!important}.view-heading{border:0}.drawing-stage{height:auto;overflow:visible}.viewer{position:static;display:block;overflow:visible;background:none;padding:0}.canvas{width:100%!important;height:auto!important;box-shadow:none}}