*{box-sizing:border-box}html{background:#0b1326;color:#dae2fd;color-scheme:dark}body{margin:0;font-family:var(--font-body,'Switzer',sans-serif);--ink:#dae2fd;--muted:#bbc4d8;--line:rgba(173,198,255,.18);--blue:#2563eb}button,a{-webkit-tap-highlight-color:transparent}button{font:inherit;cursor:pointer}button:disabled{cursor:wait;opacity:.6}button:focus-visible,a:focus-visible,summary:focus-visible,#scene:focus-visible{outline:2px solid #93b4f8;outline-offset:5px}button,a{touch-action:manipulation}button{color:inherit}a{color:#a7c8ff;text-underline-offset:4px}[hidden]{display:none!important}.skip{position:fixed;top:-70px;left:16px;z-index:15;background:#fff;color:#0b1326;padding:12px}.skip:focus{top:8px}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%)}
.masthead{height:68px;display:flex;align-items:center;gap:24px;padding:0 32px;border-bottom:1px solid var(--line);position:relative;z-index:10;background:#0b1326}.brand{display:flex;align-items:center;gap:10px;color:#dae2fd;text-decoration:none;flex-shrink:0}.brand-mark{display:grid;place-items:center;width:30px;height:30px;border-radius:6px;background:#3b82f6;color:white;font:700 19px 'Zodiak',Georgia,serif}.brand-name{font:700 16px 'Zodiak',Georgia,serif}.section-name{padding-left:24px;border-left:1px solid var(--line);font-size:14px}.edition{font-size:12px;letter-spacing:.025em;color:var(--muted);margin-left:auto}.view-switch{display:flex;background:#131b2e;border:1px solid var(--line);padding:3px;border-radius:5px}.view-switch button{border:0;background:transparent;border-radius:3px;padding:7px 13px;font-size:13px}.view-switch button[aria-pressed=true]{background:#273a60;color:white}.icon-button{width:32px;height:32px;background:transparent;border:1px solid #61708d;border-radius:50%;font:18px Georgia,serif}
#museum{position:relative;min-height:calc(100svh - 68px);height:calc(100svh - 68px);overflow:hidden}#scene{position:absolute;inset:0 0 82px;overflow:hidden;outline-offset:-4px;touch-action:none}#scene canvas{width:100%;height:100%;display:block}#loading{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;gap:16px;color:var(--muted);font-size:14px;background:#0b1326}#loading span{width:20px;height:20px;border:1px solid #6982aa;border-top-color:white;border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.scene-shade{position:absolute;inset:0 0 82px;pointer-events:none;background:linear-gradient(90deg,rgba(6,14,32,.96),rgba(6,14,32,.8) 20%,rgba(6,14,32,.12) 48%,transparent 70%),linear-gradient(0deg,rgba(6,14,32,.45),transparent 28%)}.room-marker{position:absolute;top:30px;left:36px;display:flex;align-items:center;gap:14px;color:#afbed2;font-size:10px;letter-spacing:.15em;pointer-events:none}.room-marker>span:first-child{border:1px solid #6d7d98;border-radius:50%;width:27px;height:27px;display:grid;place-items:center;font-size:10px;letter-spacing:0}.exhibit-copy{position:absolute;left:clamp(28px,4.5vw,76px);top:50%;transform:translateY(-53%);width:355px;max-height:calc(100% - 190px);overflow:auto;scrollbar-width:thin;padding:5px 12px 8px 0}.eyebrow{font-size:10px;letter-spacing:.14em;color:#aebed5;font-weight:600;margin:0 0 19px}h1{font-family:var(--font-display,'Zodiak',Georgia,serif);font-size:clamp(36px,3.6vw,58px);font-weight:400;letter-spacing:-.045em;line-height:1.12;margin:0 0 23px;outline:0}.intro{font-size:16px;line-height:1.65;color:#c4cee1;margin:0 0 24px}.actions{display:flex;align-items:center;gap:16px;flex-wrap:wrap;margin-top:22px}.primary{border:1px solid #477fea;background:var(--blue);color:#fff;border-radius:4px;font-size:14px;font-weight:600;min-height:46px;padding:12px 19px;display:flex;gap:27px;align-items:center;justify-content:space-between;box-shadow:0 5px 24px #040b1840}.primary:hover{background:#3777ee}.text-button{padding:8px 0;border:0;background:transparent;font-size:12px;color:#b5c9e9;min-height:40px}.text-button:hover{color:#fff;text-decoration:underline;text-underline-offset:4px}#source-details{font-size:12px;line-height:1.65;color:#b8c6dc;margin-top:23px}summary{cursor:pointer;list-style:none}summary::before{content:'+';display:inline-block;margin-right:8px}details[open]>summary::before{content:'−'}#source-details p{margin:12px 0}#source-links a{display:block;margin:8px 0}.exhibit-limit{font-size:11px;line-height:1.55;color:#a8b5ca;margin:16px 0 0}.look-hint{position:absolute;bottom:103px;right:32px;color:#c0c9d6;font-size:11px;text-shadow:0 1px 10px #060e20;pointer-events:none}.look-hint span{padding:0 9px}.help-panel{position:absolute;top:16px;right:24px;z-index:11;background:#131b2e;padding:24px;border:1px solid var(--line);width:320px;box-shadow:0 18px 80px #0008;font-size:14px;line-height:1.6}.help-panel strong{font-family:'Zodiak',Georgia,serif;font-size:20px;font-weight:400}.help-panel button:first-of-type{background:#263b5f;border:1px solid #4c6896;padding:10px;margin-right:14px}.graphics-note{position:absolute;top:0;left:24px;right:24px;color:#f6d09f;background:#131b2e;padding:10px;font-size:12px;z-index:2}
.journey{position:absolute;bottom:0;left:0;right:0;height:82px;display:flex;align-items:center;padding:0 36px;gap:26px;background:#0b1326;border-top:1px solid var(--line)}.room-stop{border:0;background:transparent;display:flex;gap:14px;align-items:center;text-align:left;min-width:126px;color:#8b9bb5;padding:10px 0;position:relative;font-size:15px;line-height:1.1}.room-stop small{display:block;font-size:10px;margin-bottom:6px;letter-spacing:.08em}.stop-number{width:31px;height:31px;border:1px solid #465471;border-radius:50%;display:grid;place-items:center;font-size:10px}.room-stop.current{color:#edf2ff}.room-stop.current .stop-number{border-color:#9bbbea;background:#233457}.room-stop.complete .visited::after{content:' ✓';color:#87c9b4;font-size:12px}.route-line{height:1px;background:#374460;position:relative;width:clamp(60px,15vw,220px);flex-shrink:1}.route-line span{display:block;width:0%;height:1px;background:#91b5ee;transition:width 1.2s}.route-line i{font:10px 'Switzer',sans-serif;position:absolute;top:8px;left:0;right:0;text-align:center;color:#8d9bb2;white-space:nowrap}.next-room{margin-left:auto;border:0;background:transparent;color:#cbdaf5;display:flex;gap:24px;align-items:center;font-size:13px;padding:15px 0;white-space:nowrap}.next-room:hover{color:white}.experiment-question{font-size:15px;line-height:1.5;color:#dce5f9;margin:0 0 18px}.tape-readout{display:flex;align-items:center;gap:6px;margin:0 0 15px}.bit{display:grid;place-items:center;width:39px;height:43px;font:24px monospace;border-bottom:2px solid #41526b;background:#182337;border-radius:2px}.bit.active{background:#d8e4f9;color:#142540;border-color:#7aabff}.bit.changed{background:#d9b883;color:#211d18}.tape-value{font:11px monospace;margin-left:8px;color:#aebbd0}.result{font-size:14px;line-height:1.6;color:#d7e4fa;min-height:44px;margin:0 0 12px}.rule-note{font-size:11px;color:#9eafc9;line-height:1.6;margin:0}.conversation{font-size:14px;line-height:1.55}.question{margin:0 0 12px;color:#fff}.question span{font-size:10px;text-transform:uppercase;letter-spacing:.1em;color:#91a8c9;display:block;margin-bottom:5px}.reply{margin:0 0 18px;padding-left:14px;border-left:2px solid #729cbd;color:#c9d6e6}#chat-result{font-size:12px;color:#aabed5}.noscript-note{padding:24px}
body[data-inspecting=true] h1{font-size:clamp(30px,2.6vw,42px);margin-bottom:16px}body[data-inspecting=true] .intro{display:none}body[data-inspecting=true] .eyebrow{margin-bottom:13px}body[data-inspecting=true] .exhibit-copy{top:48%;transform:translateY(-50%)}body[data-room=chatgpt] .route-line span{width:100%}body[data-view=flat] #scene,body[data-view=flat] .scene-shade,body[data-view=flat] .look-hint,body[data-view=flat] .room-marker{display:none}body[data-view=flat] #museum{height:auto;min-height:calc(100svh - 68px);padding:72px 24px 135px;overflow:visible}body[data-view=flat] .exhibit-copy{position:relative;left:auto;top:auto;transform:none;width:650px;max-width:100%;max-height:none;overflow:visible;margin:0 auto;padding:0}body[data-view=flat] h1{font-size:clamp(35px,5vw,61px)}body[data-view=flat] .intro{display:block}body[data-view=flat] .experiment-question{margin-top:32px}body[data-view=flat] .bit{width:63px;height:65px;font-size:32px}body[data-view=flat] .tape-value{font-size:14px;margin-left:14px}body[data-view=flat] .conversation{max-width:520px;font-size:17px}body[data-view=flat] .result{font-size:17px;max-width:560px}body[data-view=flat] .journey{position:fixed;z-index:8}body[data-view=flat] .rule-note{font-size:13px}body[data-view=flat] #source-details{font-size:14px}
@media(min-width:1600px){.exhibit-copy{width:410px}}@media(max-width:1050px){.brand-name{display:none}.masthead{gap:18px}.section-name{padding-left:18px}.exhibit-copy{left:30px;width:310px}h1{font-size:40px}.route-line i{display:none}.journey{gap:20px;padding:0 28px}}@media(max-width:700px){.masthead{height:60px;padding:0 18px;gap:14px}.section-name{font-size:13px;padding-left:14px}.edition{display:none}.view-switch{margin-left:auto}.view-switch button{padding:7px 11px}.icon-button{width:29px;height:29px}.brand-mark{width:28px;height:28px}.room-marker{left:20px;top:18px;font-size:9px;gap:10px}#museum{height:auto;min-height:calc(100svh - 60px);padding-bottom:115px;overflow:visible}#scene{position:relative;height:43svh;min-height:270px;max-height:420px;inset:auto;touch-action:pan-y}.scene-shade{height:43svh;min-height:270px;max-height:420px;bottom:auto;background:linear-gradient(0deg,#0b1326,transparent 24%),linear-gradient(180deg,#0b132660,transparent 20%)}.exhibit-copy,body[data-inspecting=true] .exhibit-copy{position:relative;left:auto;top:auto;transform:none;max-height:none;overflow:visible;padding:2px 25px 0;width:auto;margin-top:0}.eyebrow{font-size:9px;margin-bottom:12px}h1,body[data-inspecting=true] h1{font-size:35px;line-height:1.15;margin-bottom:18px}.intro{font-size:15px;margin-bottom:18px}.look-hint{display:none}.actions{margin-top:18px;gap:16px}.primary{min-height:47px;font-size:14px}.exhibit-limit{font-size:11px;max-width:340px}.journey{position:fixed;height:82px;padding:0 18px;gap:15px;z-index:8;box-shadow:0 -8px 25px #0b132680}.room-stop{min-width:90px;gap:9px;font-size:12px}.stop-number{width:26px;height:26px;font-size:9px}.route-line{flex:1;width:15px;min-width:12px}.room-stop small{font-size:9px}.next-room{font-size:0;gap:0;margin-left:auto;padding:12px}.next-room span{font-size:24px}.help-panel{top:12px;right:15px;left:15px;width:auto}.graphics-note{position:relative;margin:0 16px;left:auto;right:auto}body[data-view=flat] #museum{padding:40px 25px 120px}body[data-view=flat] .exhibit-copy{padding:0}.experiment-question{font-size:14px}.result{font-size:14px}.tape-value{font-size:11px}body[data-view=flat] h1{font-size:37px}body[data-view=flat] .bit{width:48px;height:52px}body[data-view=flat] .tape-value{font-size:12px}.conversation{max-width:460px}#source-details{margin-top:20px}body[data-inspecting=true] .room-marker{display:none}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important;scroll-behavior:auto!important}}
/* Keep the working object and its action in view together on a narrow screen. */
.masthead{position:sticky;top:0}
@media(max-width:700px){
 .masthead{position:sticky;top:0}
 #scene{position:sticky;top:60px;z-index:2;background:#0b1326}
 #scene canvas{mask-image:linear-gradient(#000 85%,transparent 100%)}
 .scene-shade{display:none}
 .room-marker{z-index:3}
 body[data-inspecting=true] #scene{height:31svh;min-height:230px;max-height:280px}
 body[data-inspecting=true] h1{font-size:29px;margin-bottom:14px}
 body[data-inspecting=true] .eyebrow{margin-bottom:11px}
 body[data-inspecting=true] .experiment-question{margin-bottom:12px}
 body[data-inspecting=true] .exhibit-copy{padding-top:4px}
 body[data-inspecting=true] .rule-note{font-size:10px;line-height:1.5}
 body[data-inspecting=true] .actions{margin-top:13px}
 body[data-view=flat] h1{font-size:37px}
}

/* Two rooms, one journey: calm editorial chrome around the authored objects. */
.scene-shade{background:linear-gradient(90deg,rgba(6,14,29,.98),rgba(6,14,29,.80) 22%,rgba(6,14,29,.16) 44%,transparent 64%),linear-gradient(0deg,rgba(6,14,29,.48),transparent 22%)}
.exhibit-copy{width:340px;transition:opacity .3s ease,filter .3s ease}
.eyebrow{color:#d4b98e}
body[data-room=chatgpt] .eyebrow{color:#a3d2dc}
.lesson-progress{font:10px var(--font-body,'Switzer',sans-serif);letter-spacing:.12em;text-transform:uppercase;color:#d2b586;margin:0 0 13px}
body[data-room=chatgpt] .lesson-progress{color:#a3d2dc}
.connection-note{font-size:13px;line-height:1.65;color:#e5cdab;padding-left:14px;border-left:1px solid #b79b6b;margin:18px 0 0}
.passage-note{position:absolute;z-index:5;bottom:125px;left:50%;transform:translateX(-50%);text-align:center;pointer-events:none;width:min(520px,85vw);text-shadow:0 2px 20px #000}
.passage-note strong{display:block;font:400 clamp(21px,2.2vw,31px) var(--font-display,'Zodiak',Georgia,serif);letter-spacing:-.03em;color:#f3e7d3;margin:14px 0 8px}
.passage-note>span:last-child{display:block;font-size:13px;color:#d6e1ee}
.passage-line{display:block;margin:auto;width:120px;height:1px;background:linear-gradient(90deg,#d5b481,#aedbe2);transform-origin:left;animation:passage 2.3s ease both}
body[data-traveling=true] .exhibit-copy{opacity:0;pointer-events:none}
body[data-traveling=true] .look-hint{opacity:0}
@keyframes passage{from{transform:scaleX(0)}to{transform:scaleX(1)}}
@media(min-width:701px) and (max-width:1050px){.exhibit-copy{width:290px}h1{font-size:36px}}
@media(max-width:700px){
 .exhibit-copy{width:auto}
 .passage-note{position:fixed;top:160px;bottom:auto;padding:20px 15px;background:#0b1326d9;border-radius:4px}
 .passage-note strong{font-size:23px}
 body[data-inspecting=true] .lesson-progress{font-size:9px;margin-bottom:9px}
 .connection-note{font-size:12px;margin-top:12px}
}

/* Keep actions and their source disclosure outside the scrolling explanation. */
button[aria-disabled=true]{cursor:wait;opacity:.65}
.exhibit-reading{min-height:0;scrollbar-color:#90a4c3 #142139;scrollbar-width:thin;overscroll-behavior:contain}
.exhibit-reading:focus-visible{outline:2px solid #93b4f8;outline-offset:3px}
.exhibit-controls{position:relative;flex:none;padding-top:10px;border-top:1px solid var(--line)}
.actions{display:grid;grid-template-columns:1fr auto;gap:4px 14px;margin:0}
.actions .primary{grid-column:1 / -1;width:100%}
.actions .text-button{min-height:30px;padding:4px 0}
#leave-exhibit{justify-self:end}
.exhibit-limit{font-size:10px;line-height:1.5;margin:5px 0 0}
#source-details{font-size:11.5px;line-height:1.5;margin-top:7px}
#source-details[open]{max-height:160px;overflow:auto;padding-right:8px}
.bit{transition:background-color .18s,transform .18s,border-color .18s}
.bit.writing{background:#d9b883;color:#211d18;transform:scaleY(.86)}
.rule-note{transition:color .18s}
#turing-experiment[data-phase=read] .rule-note{color:#d9b883}
#turing-experiment[data-phase=move] .bit.active{outline:1px solid #9dc4ff;outline-offset:3px}
.passage-line{animation-duration:1s}
@media(min-width:701px){
 body[data-view=museum] .exhibit-copy{display:flex;flex-direction:column;gap:18px;top:30px;transform:none;width:clamp(330px,27vw,390px);max-height:calc(100% - 130px);overflow:visible;padding:0}
 body[data-view=museum] .exhibit-reading{overflow:auto;padding:2px 8px 3px 0}
 body[data-view=museum][data-inspecting=true] h1{font-size:clamp(29px,2.35vw,39px);margin-bottom:12px}
 body[data-view=museum][data-inspecting=true] .eyebrow{margin-bottom:8px}
 body[data-view=museum] .lesson-progress{margin-bottom:9px}
 body[data-view=museum] .experiment-question{font-size:14px;margin-bottom:12px}
 body[data-view=museum] .tape-readout{margin-bottom:11px}
 body[data-view=museum] .result{min-height:0;margin-bottom:10px}
 body[data-view=museum] .connection-note{font-size:12px;margin-top:12px}
 body[data-view=museum] .exhibit-copy[data-more=true] .exhibit-controls::before{content:'Scroll for more of the lesson ↓';position:absolute;right:0;top:-20px;padding:2px 6px;background:#0b1326;color:#adc6e7;font-size:10px;line-height:16px}
}
@media(min-width:701px) and (max-width:1050px){
 body[data-view=museum] .exhibit-copy{width:290px;left:24px;top:20px;max-height:calc(100% - 116px)}
 body[data-view=museum][data-inspecting=true] h1{font-size:29px}
}
@media(max-width:700px){
 .exhibit-reading{overflow:visible;padding-bottom:3px}
 .exhibit-controls{position:sticky;bottom:82px;z-index:4;background:#0b1326;margin-top:12px;padding-top:10px;padding-bottom:6px;box-shadow:0 -8px 14px #0b1326}
 body[data-inspecting=true] .actions{margin-top:0}
 .exhibit-limit{font-size:10px;max-width:none}
 #source-details{margin-top:7px}
 body[data-view=flat] .exhibit-controls{position:static;box-shadow:none}
}
body[data-view=flat] .exhibit-reading{overflow:visible}
body[data-view=flat] .exhibit-controls{margin-top:24px}
body[data-view=flat] .actions{grid-template-columns:minmax(220px,1fr) auto;max-width:520px}
body[data-view=flat] .actions .primary{grid-column:auto;width:auto;justify-self:start}
body[data-view=flat] .exhibit-limit{font-size:11px}
body[data-view=flat] #source-details{font-size:13px}
body[data-view=flat] #source-details[open]{max-height:none;overflow:visible}

/* The foundations share Koda's chrome; each instrument owns its accent. */
.eyebrow,.lesson-progress,body[data-room=chatgpt] .eyebrow,body[data-room=chatgpt] .lesson-progress{color:var(--room-accent,#d4b98e)}
.connection-note{border-color:var(--room-accent);color:#d5deeb}
.threshold-graphic{display:grid;grid-template-columns:1fr 1fr 1fr;align-items:center;gap:18px;margin:20px 0 22px;position:relative}
.threshold-graphic::before{content:'';position:absolute;top:50%;left:10%;right:10%;height:1px;background:#526a65;z-index:-1}
.input-pair{display:grid;gap:8px}.signal-node{border:1px solid #415e59;background:#101f2b;border-radius:4px;padding:8px 10px;display:flex;justify-content:space-between;gap:10px;color:#9caaa9;font:12px 'JetBrains Mono',monospace}
.signal-node b{font-weight:500}.signal-node.on{border-color:#9bd9ba;background:#244e43;color:#d3ffe7}
.threshold-node,.output-node{background:#10212c;min-height:76px;border:1px solid #547365;border-radius:50%;display:grid;align-content:center;text-align:center;aspect-ratio:1}
.threshold-node small,.output-node small{font-size:8px;letter-spacing:.1em;color:#b5cbbb}.threshold-node strong,.output-node strong{font:28px 'JetBrains Mono',monospace;margin-top:4px}
#neuron-experiment[data-fired=true] .output-node{background:#9bd9ba;color:#10251c;border-color:#bdffe0;box-shadow:0 0 24px #8edca223}
#neuron-experiment[data-fired=true] .output-node small{color:#183d2c}
.possibility-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin:18px 0 14px}
.possibility-grid span{height:42px;display:grid;place-items:center;font:18px 'JetBrains Mono',monospace;border:1px solid #b58b4a;background:#473b26;color:#ffe3ad;border-radius:3px;transition:background .35s,color .35s,border-color .35s}
.possibility-grid span.eliminated{background:#111c2e;color:#718098;border-color:#293449;text-decoration:line-through}
.possibility-grid span.identified{background:#e8c17e;color:#2a2011;border-color:#ffe4b4}
.information-measure{display:flex;gap:18px;justify-content:space-between;padding:0 0 13px;margin-bottom:13px;border-bottom:1px solid #364155;font-size:11px;color:#aebbd0}
.information-measure strong{color:#e8c17e;font:22px 'JetBrains Mono',monospace;margin-right:4px}
.interview-pair{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin:18px 0}
.interview-pair>div{border-top:1px solid #836b87;padding-top:10px}.participant{display:grid;place-items:center;width:26px;height:26px;border-radius:50%;border:1px solid #a58ca6;color:#e5cce5;font:12px 'JetBrains Mono',monospace}
.interview-pair p{font-size:13px;line-height:1.6;color:#e1dbe8;margin:10px 0 0}.reveal-note{border-left:2px solid #d5b7d3;padding:9px 12px;background:#272236;color:#ead7ef;font-size:13px}
.room-stops{display:flex;align-items:center;justify-content:space-between;gap:18px;flex:1;min-width:0}.journey{gap:24px}.room-stop{min-width:0;font-size:13px;gap:10px;flex:1}.room-stop small{font-size:10px;white-space:nowrap}.room-stop.current .stop-number{border-color:var(--room-accent)}
.room-stop[data-room=chatgpt]{border-left:1px dashed #475369;padding-left:22px}.previous-room{border:0;background:transparent;color:#d1ddf0;font-size:23px;min-width:36px;min-height:44px;padding:7px}.previous-room:disabled{opacity:.25;cursor:default}.next-room{font-size:12px;gap:14px;margin-left:6px;min-height:44px}
body[data-view=flat] .threshold-graphic{max-width:410px;gap:34px}body[data-view=flat] .possibility-grid{max-width:520px;gap:12px}body[data-view=flat] .possibility-grid span{height:58px;font-size:24px}body[data-view=flat] .information-measure{max-width:520px}body[data-view=flat] .interview-pair{max-width:570px;gap:28px}body[data-view=flat] .interview-pair p{font-size:17px}
@media(max-width:1050px) and (min-width:701px){.journey{gap:14px;padding:0 18px}.room-stops{gap:14px}.room-stop{font-size:11px;gap:7px}.stop-number{width:25px;height:25px;flex:none}.room-stop[data-room=chatgpt]{padding-left:14px}.next-room{font-size:0}.next-room span{font-size:23px}.threshold-graphic{gap:10px}.threshold-node small,.output-node small{font-size:7px}}
@media(max-width:700px){
 .journey{display:grid;grid-template-columns:30px minmax(0,1fr) 30px;gap:7px;padding:0 10px;height:82px}
 .room-stops{gap:4px;align-items:center}.room-stop{display:flex;justify-content:center;text-align:center;gap:0;min-width:0;padding:12px 1px;min-height:48px;border-bottom:2px solid transparent;flex:1}
 .room-stop .stop-number,.room-stop .stop-name{display:none}.room-stop small{font-size:10px;margin:0;letter-spacing:0;white-space:normal;line-height:1.6}.room-stop.current{border-bottom-color:var(--room-accent)}
 .room-stop[data-room=chatgpt]{padding-left:5px;border-left:1px dashed #475369}.room-stop .visited{font-size:9px;display:block;min-height:10px}.room-stop.complete .visited::after{font-size:9px}
 .previous-room,.next-room{min-width:30px;margin:0;padding:0;justify-content:center;font-size:0}.previous-room{font-size:22px}.next-room span{font-size:22px}
 .threshold-graphic{gap:18px;margin-top:15px}.interview-pair p{font-size:13px}.information-measure{font-size:11px;gap:8px}
}
/* Keep the final audio/source controls scrollable above the fixed museum route. */
@media screen{
 body[data-view=museum] .exhibit-copy .exhibit-controls{padding-bottom:110px}
 body[data-view=museum] .exhibit-controls :is(summary,button,input){scroll-margin-bottom:110px}
}