:root{color-scheme:dark;--os-bg:#091216;--os-panel:#102027;--os-text:#ecf1ed;--os-ink:#91dacd;--os-dim:#a0b4b7;--os-line:#30474e;--paper:#081013}
html[data-theme=light]{color-scheme:light;--os-bg:#f5f4ee;--os-panel:#eceee7;--os-text:#162e34;--os-ink:#146655;--os-dim:#48636a;--os-line:#b7c8c5;--paper:#e7ebe5}
*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--os-text);font:14px/1.5 ui-monospace,SFMono-Regular,Consolas,monospace}a{color:var(--os-ink)}button,input,select{font:inherit;color:inherit}button{border:1px solid var(--os-line);background:transparent;padding:8px 12px;cursor:pointer}button:hover{border-color:var(--os-ink);background:var(--os-panel)}:focus-visible{outline:2px solid var(--os-ink);outline-offset:3px}button:disabled{opacity:.5;cursor:wait}.primary{color:var(--os-bg);background:var(--os-ink);border-color:var(--os-ink)}.primary:hover{color:var(--os-text)}select,input{background:var(--os-bg);border:1px solid var(--os-line);padding:7px}input[type=range]{padding:0;accent-color:var(--os-ink);min-width:80px}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%)}[hidden]{display:none!important}
.os{max-width:1560px;margin:auto;padding:34px clamp(12px,3vw,48px) 60px}.mast{display:flex;align-items:end;justify-content:space-between;gap:24px;margin-bottom:30px}.eyebrow,.small,.narrative-label{font-size:10px;text-transform:uppercase;letter-spacing:.12em}.eyebrow{text-decoration:none}h1{font:normal clamp(34px,4.7vw,65px)/1.07 Georgia,serif;letter-spacing:-.04em;margin:14px 0}h1 em{font-weight:normal;color:var(--os-ink)}.mast p{margin:0;color:var(--os-dim);font-size:12px}.pilot-mark{text-align:right;font-size:10px;letter-spacing:.13em;line-height:2.2}.pilot-mark small{color:var(--os-dim);letter-spacing:0}.status-dot{display:inline-block;width:6px;height:6px;border-radius:50%;background:var(--os-ink);margin-right:6px}
.console{border:1px solid var(--os-line);background:var(--os-bg);position:relative}.transport{display:flex;align-items:center;gap:10px;padding:14px 18px;border-bottom:1px solid var(--os-line);flex-wrap:wrap}.transport label{font-size:10px;text-transform:uppercase;color:var(--os-dim)}#chapter-select{flex:1;min-width:160px;max-width:310px}#position{flex:2}#position-text{font-size:11px;min-width:108px;font-variant-numeric:tabular-nums}.identity{padding:10px 18px;display:flex;justify-content:space-between;gap:16px;border-bottom:1px solid var(--os-line);font-size:10px;letter-spacing:.05em;color:var(--os-dim)}#state-message{white-space:nowrap}.narrative-window{height:154px;overflow:auto;overscroll-behavior:contain;padding:18px clamp(16px,3vw,40px);border-bottom:1px solid var(--os-line)}.narrative-label{color:var(--os-dim)}.passage{font:normal clamp(20px,2.1vw,29px)/1.4 Georgia,serif;max-width:70ch;margin:10px 0 0;overflow-wrap:anywhere}.clocks{display:grid;grid-template-columns:1fr 2fr 1fr;border-bottom:1px solid var(--os-line)}.clocks>div{padding:10px 18px;border-right:1px solid var(--os-line)}.clocks>div:last-child{border:0}.clocks span{display:block;color:var(--os-dim);font-size:9px;text-transform:uppercase;letter-spacing:.08em}.clocks strong{font-size:11px;font-weight:400;display:block;margin-top:3px;min-height:17px}
.work-area{display:grid;grid-template-columns:minmax(0,1fr) 250px}.instrument{position:relative;min-width:0;display:flex;flex-direction:column;padding:14px 18px 8px}.instrument-title,.instrument-foot{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-shrink:0}.instrument-title{min-height:32px}.instrument-title h2{font:11px/1.4 ui-monospace,monospace;text-transform:uppercase;letter-spacing:.05em;margin:0}.instrument-title>span{color:var(--os-dim);font-size:10px}.instrument canvas{display:block;width:100%;aspect-ratio:3/2;object-fit:contain;max-height:62vh}.instrument-foot{font-size:8px;letter-spacing:.08em;color:var(--os-dim);padding:10px 0 3px;border-top:1px solid var(--os-line)}.observer{border-left:1px solid var(--os-line);padding:20px;display:flex;flex-direction:column;gap:12px;font-size:11px}.observer .small{color:var(--os-ink)}dl{margin:0}dt{font-size:9px;color:var(--os-dim);margin:10px 0 4px;text-transform:uppercase;letter-spacing:.06em}dd{margin:0;font-size:12px}dd#lattice-count{font-size:20px;color:var(--os-ink)}.description{color:var(--os-dim);font:12px/1.6 system-ui,sans-serif;min-height:76px;margin:4px 0}.observer button{font-size:10px;text-align:left}.device{display:flex;align-items:center;gap:12px;margin-top:auto;border-top:1px solid var(--os-line);padding-top:14px;text-decoration:none;font-size:9px}.device canvas{display:block;width:76px;height:76px;image-rendering:pixelated}.bezel{display:flex;justify-content:space-between;gap:12px;align-items:center;padding:10px 16px;border-top:1px solid var(--os-line)}.bezel>div{display:flex;gap:6px;flex-wrap:wrap}.bezel button{font-size:10px}.bezel>.small{font-size:8px;color:var(--os-dim)}#evidence-mobile,#lab-mobile{display:none}.chapter-ticker{display:flex;overflow-x:auto;gap:8px;padding:14px 0 8px;scrollbar-width:thin;overscroll-behavior-x:contain}.chapter-ticker button{white-space:nowrap;font-size:10px;flex:none}.chapter-ticker button[aria-current=true]{border-color:var(--os-ink);color:var(--os-ink)}.about-pilot{display:flex;justify-content:space-between;gap:25px;font:12px/1.7 system-ui,sans-serif;color:var(--os-dim);margin-top:18px}.about-pilot p{max-width:72ch}.about-pilot a{white-space:nowrap}#end-note{padding:18px}
dialog{max-width:min(620px,94vw);max-height:90svh;overflow:auto;padding:26px;background:var(--os-bg);color:var(--os-text);border:1px solid var(--os-ink)}dialog::backdrop{background:#000a}dialog h2{font:28px Georgia,serif;margin:8px 0 16px}dialog p,dialog blockquote{font:14px/1.6 system-ui,sans-serif}dialog blockquote{border-left:2px solid var(--os-ink);margin:16px 0;padding-left:16px}dialog input{display:block;width:100%;margin:10px 0 18px}dialog canvas{width:180px;height:180px;display:block;margin:16px auto}dialog video{max-width:100%;max-height:240px}.actions{display:flex;gap:10px;flex-wrap:wrap}
#lab{border-top:1px solid var(--os-ink);padding:18px;background:var(--os-panel)}.lab-title{display:flex;align-items:center;justify-content:space-between;gap:12px}.lab-title strong{font-size:13px}#lab p{font:13px/1.5 system-ui,sans-serif;color:var(--os-dim)}.lab-inputs{display:flex;gap:18px;flex-wrap:wrap}.lab-inputs label{font-size:10px}.lab-inputs input{display:block;width:140px;margin-top:6px}#lab-result{display:block;margin:18px 0;color:var(--os-ink);font-size:15px}
.remote .narrative-window,.remote .observer,.remote #visuals,.remote #lab-mobile,.remote #experiment{display:none}.remote .work-area{grid-template-columns:1fr}.remote-census{padding:8px 18px;color:var(--os-dim);font-size:10px;border-bottom:1px solid var(--os-line)}.visuals-hidden .operating-system{display:none}.visuals-hidden .narrative-window{height:360px}.console:is(:fullscreen,.screen-takeover){position:fixed;inset:0;width:100%;height:100%;margin:0;z-index:2147483647;display:flex;flex-direction:column;overflow:auto}.console.screen-takeover{height:100vh;height:100svh;bottom:auto}.console-takeover{overflow:hidden!important}.console-takeover .site-enclosure{visibility:hidden}.console:is(:fullscreen,.screen-takeover)>:not(.operating-system){flex-shrink:0}.console:is(:fullscreen,.screen-takeover) .operating-system{flex:1;min-height:min-content;display:flex;flex-direction:column}.console:is(:fullscreen,.screen-takeover) .clocks{flex-shrink:0}.console:is(:fullscreen,.screen-takeover) .work-area{flex:1;min-height:240px}.console:is(:fullscreen,.screen-takeover) .instrument canvas{flex:1 1 0;height:0;min-height:0;max-height:none;aspect-ratio:auto}.console:is(:fullscreen,.screen-takeover) .instrument{min-height:240px;overflow:hidden}.console:is(:fullscreen,.screen-takeover) .observer{overflow:auto;min-height:0}.console:is(:fullscreen,.screen-takeover) .narrative-window{height:clamp(110px,20svh,154px)}.reader-fullscreen .site-interference-field{display:none}
@media(max-width:850px){.observer{display:none}.work-area{grid-template-columns:1fr}#evidence-mobile,#lab-mobile{display:inline-block}.bezel>.small{display:none}.pilot-mark{display:none}.about-pilot{display:block}.instrument canvas{max-height:none}.instrument-title h2{font-size:10px}.clocks>div{padding:8px 10px}.clocks strong{font-size:9px;min-height:28px}.mast{margin-bottom:22px}.os{padding-top:24px}.remote #evidence-mobile{display:inline-block}}
@media(max-width:520px){.transport{padding:10px;gap:7px}.transport button,.transport select{font-size:11px;padding:8px}.transport label{display:none}#chapter-select{min-width:120px}#position{order:7;flex-basis:60%}#position-text{order:8;min-width:96px}.identity{font-size:8px;padding:10px;gap:8px}.identity #chapter-label{max-width:72%}.instrument{padding:10px 8px 6px}.narrative-window{height:150px;padding:14px}.bezel{padding:8px}.bezel>div{gap:5px}.bezel button{padding:8px;font-size:9px}.instrument-foot{font-size:6px}.clocks{grid-template-columns:1fr 1.6fr .7fr}.lab-title{align-items:start}.lab-inputs input{width:120px}h1{font-size:37px}.mast p{font-size:11px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}}
/* Construction notes are opt-in, not editorial overlays on the lecture. */
.observer .description{display:none}