@font-face{font-family:Kalameh;src:url('vendor/fonts/kalameh/Kalameh-400.woff2') format('woff2');font-weight:400;font-display:swap}
@font-face{font-family:Kalameh;src:url('vendor/fonts/kalameh/Kalameh-600.woff2') format('woff2');font-weight:600;font-display:swap}
@font-face{font-family:Kalameh;src:url('vendor/fonts/kalameh/Kalameh-700.woff2') format('woff2');font-weight:700;font-display:swap}
@font-face{font-family:Mono;src:url('vendor/fonts/JetBrainsMono-var.woff2') format('woff2');font-weight:100 800;font-display:swap}
:root{--paper:#f3f1ea;--ink:#24382f;--muted:#626b61;--line:#d1d3c7;--red:#ae4933;--green:#244839;--footer:98px;--header:92px;--edge:clamp(24px,3.6vw,64px);color-scheme:light}
*{box-sizing:border-box}html{scroll-behavior:auto;scrollbar-width:thin;scrollbar-color:#9fa897 var(--paper)}body{margin:0;background:var(--paper);color:var(--ink);font:400 16px/1.8 Kalameh,system-ui,sans-serif;-webkit-font-smoothing:antialiased}button,a{-webkit-tap-highlight-color:transparent}button,input{font:inherit}button{cursor:pointer;color:inherit}a{color:inherit}button:disabled{opacity:.3;cursor:default}button:focus-visible,a:focus-visible,canvas:focus-visible{outline:2px solid var(--red);outline-offset:5px}.mono{font-family:Mono,monospace;direction:ltr;font-variant-numeric:tabular-nums}button{border:0;background:none}button,a{touch-action:manipulation}::selection{background:#d5dfc9}em{font-style:normal;color:var(--red)}.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:0;right:24px;z-index:50;padding:12px 20px;background:var(--ink);color:var(--paper);transform:translateY(-110%)}.skip-link:focus{transform:none}.track{height:740vh}.masthead{height:var(--header);position:fixed;inset:0 0 auto;z-index:10;margin:0 var(--edge);display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);background:var(--paper)}.identity{display:flex;align-items:center;gap:14px;text-decoration:none;font-size:19px;font-weight:600;line-height:1.4}.identity small{display:block;color:var(--muted);font-size:11px;font-weight:400;margin-top:4px}.brand-mark{width:35px;height:35px;fill:none;stroke:var(--ink);stroke-width:1.3}.brand-load{stroke:var(--red);stroke-width:1.8}.edition{font-size:11px;display:flex;gap:12px;align-items:center;color:var(--muted)}.edition .mono{font-size:9px;border-right:1px solid var(--line);padding-right:12px}.live-dot{width:6px;height:6px;background:var(--green);border-radius:50%}.contact-trigger{padding:10px 0;font-size:12px;border-bottom:1px solid var(--ink)}.contact-trigger span{margin-right:16px;font-size:19px}
.drawing{position:fixed;left:var(--edge);width:calc(59% - var(--edge));top:calc(var(--header) + 24px);bottom:calc(var(--footer) + 26px);display:grid;grid-template-rows:30px 1fr 34px}.drawing-top,.drawing-bottom{display:flex;align-items:center;justify-content:space-between;gap:12px;color:var(--muted);font-size:11px}.drawing-top{border-bottom:1px solid var(--line)}.drawing-top .mono{font-size:9px;letter-spacing:.09em;order:2}.view{position:relative;overflow:hidden;min-height:0;isolation:isolate}.view:before,.view:after{position:absolute;content:'+';z-index:2;color:#9ba18f;line-height:1;font:18px Mono;pointer-events:none}.view:before{top:12px;right:0}.view:after{bottom:12px;left:0}.drawing-grid{position:absolute;inset:0;background-image:linear-gradient(#24382f07 1px,transparent 1px),linear-gradient(90deg,#24382f07 1px,transparent 1px);background-size:32px 32px;mask-image:radial-gradient(ellipse,#000 30%,transparent 80%);pointer-events:none}canvas{display:block;width:100%;height:100%;position:absolute;inset:0;cursor:grab;touch-action:pan-y;opacity:0;transition:opacity .35s}canvas:active{cursor:grabbing}.model-ready canvas{opacity:1}.model-poster{position:absolute;width:100%;height:100%;inset:0;object-fit:contain;opacity:.6;filter:grayscale(1);transition:opacity .3s}.model-ready .model-poster{opacity:0;pointer-events:none}.drawing-bottom{border-top:1px solid var(--line)}.model-hint{display:flex;align-items:center;gap:9px;font-size:10px}.model-hint i{font-style:normal;font-size:20px}.drawing-number{font-size:9px;letter-spacing:.08em;order:3}.drawing-number b{color:var(--red);font-weight:500}.view-controls{display:flex;gap:5px}.view-controls button{font:16px Mono;width:32px;height:32px}.view-controls button:hover{background:#e4e7dc}.axis{position:absolute;left:22px;bottom:24px;width:46px;height:50px;pointer-events:none;font:9px Mono;color:#899282;opacity:.7}.axis i{position:absolute;left:15px;top:8px;width:1px;height:30px;background:#6e7f68;transform:rotate(0)}.axis i:after,.axis i:before{content:'';position:absolute;bottom:0;width:28px;height:1px;background:#6e7f68;transform-origin:left;transform:rotate(-25deg)}.axis i:after{transform:rotate(-150deg)}.axis span{position:absolute;left:12px;top:-3px}.axis b{font-weight:400;position:absolute;left:41px;top:23px}.axis em{position:absolute;left:-9px;top:20px;color:inherit}.fallback-note{display:none;position:absolute;bottom:45px;background:var(--paper);font-size:12px;padding:8px}.model-failed .fallback-note{display:block}.model-failed canvas{display:none}.model-failed .model-poster{opacity:1}.model-failed .model-hint,.model-failed .view-controls{visibility:hidden}
.panels{position:fixed;right:var(--edge);width:calc(34% - 8px);top:calc(var(--header) + 48px);bottom:calc(var(--footer) + 28px);display:flex;flex-direction:column;justify-content:center}.panel{position:absolute;width:100%;max-height:calc(100% - 46px);overflow-y:auto;scrollbar-width:thin;padding:2px 2px 6px;opacity:0;visibility:hidden;pointer-events:none;transform:translateY(8px);transition:opacity .22s,transform .35s,visibility .22s}.panel.on{opacity:1;visibility:visible;pointer-events:auto;transform:none}.panel .no,.no{font-size:11px;font-weight:600;display:flex;align-items:center;justify-content:space-between;color:var(--red);margin:0 0 24px;gap:10px}.no .mono{font-size:8px;letter-spacing:.08em;opacity:.85}.panel h1,.panel h2{font-size:clamp(32px,3.6vw,59px);font-weight:600;line-height:1.26;letter-spacing:-.025em;margin:0 0 22px}.panel p{font-size:14px;color:var(--muted);line-height:2;margin:0 0 16px;max-width:43ch}.panel p.intro{font-size:16px;line-height:1.8;color:var(--ink);margin:0 0 12px}.panel p.panel-foot{font-size:11px;line-height:1.9;color:#778071;margin:18px 0 0}.specs{display:flex;gap:0;margin:24px 0}.specs div{flex:1;border-left:1px solid var(--line);padding:0 14px}.specs div:first-child{padding-right:0}.specs div:last-child{border-left:0}.specs b{display:block;font-size:27px;font-weight:400;line-height:1.4}.specs span{font-size:11px;color:var(--muted)}.primary{padding:12px 20px;display:inline-flex;align-items:center;justify-content:space-between;gap:34px;background:var(--green);color:#f8f6ee;font-size:13px;text-decoration:none;min-height:47px;transition:background .2s,transform .2s}.primary:hover{background:#35614c;transform:translateY(-1px)}.primary span{font:19px Kalameh}.panel-foot+.primary,.fact+.primary{margin-top:24px}.fact{margin-top:24px;padding:16px 0;border-block:1px solid var(--line)}.fact span{display:block;color:var(--muted);font-size:11px;margin-bottom:5px}.fact b{font-size:19px;font-weight:400}.fact bdi{font-family:Mono;font-size:20px}.route{display:flex;align-items:center;justify-content:space-between;margin-top:24px;color:var(--muted);font-size:12px}.route i{font-style:normal;color:#929b88}.route .active{color:var(--red);border-bottom:1px solid var(--red)}.equation{border-block:1px solid var(--line);padding:17px 0;margin:24px 0 0}.equation span{font-size:11px;color:var(--muted);display:block;margin-bottom:8px}.equation bdi{display:block;text-align:right;font:400 clamp(15px,1.55vw,24px)/1.5 Mono;white-space:nowrap}.equation strong{color:var(--red);font-weight:500}.equation small{font-size:11px}.material-list{margin-top:24px;border-top:1px solid var(--line)}.material-list>div{display:flex;gap:9px;align-items:center;border-bottom:1px solid var(--line);padding:12px 0;font-size:12px}.material-list bdi{margin-right:auto;font:10px Mono}.material-dot{width:7px;height:7px;flex:none;border-radius:50%}.material-dot.concrete{background:#b9b6a9}.material-dot.steel{background:var(--red)}.story-controls{position:absolute;bottom:0;width:100%;display:flex;justify-content:space-between;align-items:center;border-top:1px solid var(--line);padding-top:10px;font-size:11px}.story-controls button{padding:4px 0;display:flex;align-items:center;gap:10px;min-width:50px}.story-controls .mono{font-size:9px;color:var(--muted)}
.progress{position:fixed;bottom:calc(var(--footer) - 1px);left:var(--edge);right:var(--edge);height:2px;background:var(--line);z-index:9;display:flex;justify-content:flex-start}.progress i{height:2px;background:var(--red);width:0;display:block}.sheet-footer{position:fixed;bottom:0;height:var(--footer);inset-inline:var(--edge);z-index:9;display:flex;align-items:center;justify-content:space-between;gap:20px;background:var(--paper)}.sheet-label{min-width:95px;display:flex;flex-direction:column;gap:0}.sheet-label .mono{font-size:10px;letter-spacing:.13em}.sheet-label>span:last-child{font-size:10px;color:var(--muted)}.index{display:flex;justify-content:space-between;gap:6px;flex:1;max-width:740px}.index button{min-width:60px;flex:1;position:relative;display:flex;flex-direction:column;align-items:center;gap:2px;font-size:11px;min-height:54px;justify-content:center;transition:background .2s}.index button .mono{font-size:9px;color:var(--muted)}.index button b{font-weight:400}.index button[aria-current=step]{background:var(--green);color:var(--paper)}.index button[aria-current=step] .mono{color:#d6e0cf}.index button:hover:not([aria-current]){background:#e7e8de}.read-toggle{font-size:11px;white-space:nowrap;min-height:44px}.read-toggle span{margin-right:10px;font-size:20px}
.leads{position:fixed;inset:0;width:100%;height:100%;pointer-events:none;z-index:4}.ann{position:fixed;z-index:5;pointer-events:none;white-space:nowrap;background:var(--paper);border:1px solid var(--line);padding:4px 8px;color:var(--ink);opacity:0}.ann b{font:500 11px Mono;display:block;direction:ltr}.ann.red{border-color:#bd5e4666;color:var(--red)}
dialog{border:1px solid var(--line);background:var(--paper);color:var(--ink);padding:48px;width:min(520px,calc(100% - 32px));max-height:calc(100dvh - 32px)}dialog::backdrop{background:#20372c75;backdrop-filter:blur(6px)}.dialog-close{position:absolute;left:14px;top:8px;font:30px Kalameh;width:40px;height:40px}dialog .no{font-size:9px;letter-spacing:.15em;margin-top:12px}dialog h2{font-size:37px;font-weight:600;line-height:1.4;margin:0 0 20px}dialog p{font-size:14px;line-height:2;color:var(--muted)}.contact-number{font-size:27px;text-decoration:none;display:block;margin:24px 0}.contact-number:hover{color:var(--red)}dialog .primary{width:100%}dialog .dialog-note{font-size:11px;margin-bottom:0}.noscript-note{position:fixed;bottom:0;background:var(--paper);padding:12px;z-index:20}
body.reading .track{display:none}body.reading .drawing{position:relative;inset:auto;width:min(780px,90%);height:440px;margin:calc(var(--header) + 20px) auto 0}body.reading .panels{position:relative;inset:auto;width:min(680px,calc(100% - 48px));display:block;margin:50px auto calc(var(--footer) + 40px)}body.reading .panel{position:relative;max-height:none;opacity:1;visibility:visible;pointer-events:auto;transform:none;margin:0 0 60px;padding:0 0 60px;border-bottom:1px solid var(--line);overflow:visible}body.reading .panel p{max-width:none}body.reading .panel h1,body.reading .panel h2{font-size:42px}body.reading .story-controls,body.reading .leads,body.reading .ann{display:none}body.reading .progress{display:none}body.reading .sheet-footer{border-top:1px solid var(--line)}
@media(min-width:1600px){.panels{right:calc(var(--edge) + 2%);width:31%}.panel p{font-size:16px}.panel p.intro{font-size:18px}.panel .no{font-size:12px}}
@media(max-width:1050px) and (min-width:761px){:root{--edge:28px}.panels{width:35%}.panel h1,.panel h2{font-size:36px}.panel p{font-size:13px}.panel p.intro{font-size:14px}.panel .no{margin-bottom:18px}.no .mono{display:none}.drawing{width:calc(60% - 28px)}.edition{display:none}.sheet-label{display:none}.index button{min-width:48px}.index{gap:3px}}
@media(max-width:760px){:root{--header:76px;--footer:78px;--edge:20px}.track{height:690vh}.masthead{gap:16px}.identity{font-size:16px;gap:9px}.brand-mark{width:29px;height:29px}.identity small{font-size:9px;margin-top:3px}.edition{display:none}.contact-trigger{font-size:10px;white-space:nowrap;max-width:110px;line-height:1.4;text-align:right}.contact-trigger span{font-size:16px;margin-right:5px}.drawing{inset:calc(var(--header) + 9px) var(--edge) auto;width:auto;height:calc((100dvh - var(--header) - var(--footer))*0.48);grid-template-rows:21px 1fr 26px}.drawing-top{font-size:9px}.drawing-top .mono{font-size:7px;letter-spacing:.03em}.drawing-bottom{font-size:8px}.model-hint{font-size:8px;gap:6px}.model-hint i{font-size:16px}.view-controls{gap:0}.view-controls button{width:28px;height:26px;font-size:14px}.drawing-number{font-size:7px}.axis{transform:scale(.7);transform-origin:bottom left;bottom:12px;left:14px}.panels{top:calc(var(--header) + 22px + (100dvh - var(--header) - var(--footer))*0.48);bottom:calc(var(--footer) + 14px);right:var(--edge);left:var(--edge);width:auto;justify-content:center}.panel{max-height:calc(100% - 38px);padding-top:0}.panel .no{font-size:10px;margin-bottom:12px}.no .mono{font-size:7px}.panel h1,.panel h2{font-size:clamp(26px,7.4vw,36px);line-height:1.2;margin-bottom:12px}.panel h1 br,.panel h2 br{display:none}.panel p{font-size:12px;line-height:1.9;max-width:none;margin-bottom:10px}.panel p.intro{font-size:13px;line-height:1.7;margin-bottom:9px}.panel p.panel-foot{font-size:10px;line-height:1.7;margin-top:10px}.specs{margin:14px 0}.specs b{font-size:22px}.specs span{font-size:9px}.primary{font-size:11px;padding:8px 15px;min-height:39px;gap:22px}.panel#stage-0 .panel-foot{display:none}.fact{margin-top:12px;padding:10px 0}.fact span{font-size:10px;margin-bottom:3px}.fact b{font-size:16px}.fact bdi{font-size:17px}.fact+.primary{margin-top:13px}.route{margin-top:14px;font-size:11px}.equation{margin-top:12px;padding:10px 0}.equation span{font-size:10px;margin-bottom:5px}.equation bdi{font-size:16px}.material-list{margin-top:12px}.material-list>div{padding:7px 0;font-size:11px}.material-list bdi{font-size:10px}.story-controls{font-size:10px;padding-top:5px}.story-controls .mono{font-size:8px}.sheet-footer{gap:6px;flex-wrap:wrap;align-content:center;justify-content:center;row-gap:0}.sheet-label{display:none}.index{width:100%;max-width:none;gap:2px;flex-basis:100%}.index button{min-width:0;min-height:43px;padding:2px;font-size:9px;gap:0}.index button .mono{font-size:8px}.read-toggle{font-size:9px;min-height:24px;line-height:1}.read-toggle span{font-size:14px;margin-right:6px}.ann{padding:3px 5px}.ann b{font-size:9px}dialog{padding:36px 24px}dialog h2{font-size:30px}.contact-number{font-size:24px}.fallback-note{font-size:10px;bottom:30px}body.reading .drawing{height:300px}body.reading .panel h1,body.reading .panel h2{font-size:30px}body.reading .panel{margin-bottom:32px;padding-bottom:32px}body.reading .panel p{font-size:14px}}
@media(max-height:700px) and (min-width:761px){:root{--header:70px;--footer:76px}.panel h1,.panel h2{font-size:36px;margin-bottom:14px}.panel .no{margin-bottom:15px}.panel p{font-size:13px;margin-bottom:8px}.panel p.intro{font-size:14px}.specs{margin:16px 0}.fact,.material-list,.equation{margin-top:14px}.panels{top:90px}}
@media(max-height:720px) and (max-width:760px){:root{--header:64px;--footer:72px}.drawing{height:calc((100dvh - var(--header) - var(--footer))*.40)}.panels{top:calc(var(--header) + 22px + (100dvh - var(--header) - var(--footer))*.40)}.panel h1,.panel h2{font-size:26px}.panel p{font-size:11px}.panel p.intro{font-size:12px}.panel .no{margin-bottom:8px}.specs{margin:10px 0}.specs b{font-size:19px}.primary{min-height:35px}.panel p.panel-foot{font-size:9px}}
.panels{display:grid;grid-template-rows:minmax(0,1fr);align-items:center;padding-bottom:48px}.panel{position:relative;grid-area:1/1;max-height:100%}.model-ready .model-poster{visibility:hidden}
@media(max-width:760px){.panels{padding-bottom:36px}.panel .specs{margin:11px 0}.panel .specs b{font-size:24px}}
.panel:focus-visible{outline:none}
@media(max-width:760px){.drawing{height:calc((100dvh - var(--header) - var(--footer))*.40)}.panels{top:calc(var(--header) + 22px + (100dvh - var(--header) - var(--footer))*.40)}}
@media(max-height:720px) and (max-width:760px){.drawing{height:calc((100dvh - var(--header) - var(--footer))*.34)}.panels{top:calc(var(--header) + 22px + (100dvh - var(--header) - var(--footer))*.34)}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}
.view-controls{align-items:center;gap:4px}.view-controls .tour-toggle{width:auto;padding:0 9px;display:flex;align-items:center;gap:7px;font:10px Kalameh;white-space:nowrap;border-inline-start:1px solid var(--line);margin-inline-start:5px}.tour-toggle span{font-size:9px}.tour-toggle[aria-pressed=true]{color:var(--red);background:#e9e7dc}.drawing-grid{opacity:.50}.model-poster{filter:none}
.model-failed .model-poster{visibility:visible}
@media(max-width:760px){.view-controls{gap:0}.view-controls .tour-toggle{font-size:9px;padding:0 5px;margin-inline-start:2px;gap:5px}.model-hint{font-size:7.5px}}