@font-face{font-family:GraphiteSans;src:url("/brand/fonts/Manrope.ttf") format("truetype");font-weight:200 800;font-style:normal;font-display:swap}

/* ---------------------------------------------------------------------------
   Theme. The page flips between graphite and paper as the story moves.      */
:root{
 color-scheme:dark;
 --bg:#111719;--bg-2:#0c1113;--panel:#1a2224;--panel-2:#212b2d;--ink:#f1f2ea;--ink-2:#c9d1cb;--muted:#98a49e;--faint:#6f7b75;
 --line:rgba(255,255,255,.11);--line-2:rgba(255,255,255,.2);--accent:#cee9b2;--accent-ink:#172017;--hot:#ff7a2f;
 --stage:radial-gradient(ellipse at 58% 46%,#23302c 0%,#161d1f 48%,#111719 78%);--stage-grid:none;
 --header:76px;--mono:ui-monospace,"SF Mono",Menlo,Consolas,"Liberation Mono",monospace;--sans:GraphiteSans,"Helvetica Neue",Arial,sans-serif;
 font-family:var(--sans);font-synthesis:none;font-weight:400;background:var(--bg);color:var(--ink)
}
:root[data-theme=paper],.paper-section{
 color-scheme:light;
 --bg:#f1f0ea;--bg-2:#e9e8e1;--panel:#fbfbf8;--panel-2:#f2f2ec;--ink:#151f27;--ink-2:#2f3b45;--muted:#5b6770;--faint:#8b959c;
 --line:rgba(21,31,39,.13);--line-2:rgba(21,31,39,.26);--accent:#2f6f3e;--accent-ink:#ffffff;--hot:#e8641c;
 --stage:radial-gradient(ellipse at 58% 46%,#ffffff 0%,#f3f2ec 55%,#e9e8e1 100%);
 --stage-grid:linear-gradient(rgba(21,31,39,.075) 1px,transparent 1px) 0 0/48px 48px,linear-gradient(90deg,rgba(21,31,39,.075) 1px,transparent 1px) 0 0/48px 100%
}
*{box-sizing:border-box}[hidden]{display:none!important}
html{scroll-behavior:smooth;scroll-padding-top:90px}
body{margin:0;background:var(--bg);color:var(--ink);transition:background-color .7s ease,color .7s ease;-webkit-font-smoothing:antialiased}
button,input,select{font:inherit}button,a,input,select{-webkit-tap-highlight-color:transparent}button,a{touch-action:manipulation}button{cursor:pointer;color:inherit;border:0;background:none;padding:0}
a{color:inherit;text-decoration:none}a:hover{color:var(--accent)}
button:focus-visible,a:focus-visible,select:focus-visible,input:focus-visible,[tabindex]:focus-visible{outline:2px solid var(--accent);outline-offset:4px}
::selection{background:var(--accent);color:var(--accent-ink)}
.mono,.eyebrow,.titleblock,.legend,.record,.scene-heading,.stage-heading,.scene-bottom span,.mini-label,.range-labels,.sheets span,.who,.bubble small,.recipe-strip span,.project-downloads a,.fine,.assembly-steps>button>span{font-family:var(--mono)}
.skip{position:fixed;top:-80px;left:20px;z-index:100;background:var(--accent);padding:15px;color:var(--accent-ink)}.skip:focus{top:12px}

/* Header --------------------------------------------------------------- */
.site-header{height:var(--header);padding:0 4vw;display:flex;align-items:center;justify-content:space-between;gap:24px;position:sticky;top:0;z-index:20;background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:blur(16px);border-bottom:1px solid var(--line);transition:background-color .7s ease}
.site-header img{display:block;object-fit:contain;margin-left:-7px}
.site-header .logo-dark{display:none}:root[data-theme=paper] .site-header .logo-light{display:none}:root[data-theme=paper] .site-header .logo-dark{display:block}
.site-header nav{display:flex;gap:26px;font-size:13.5px;font-weight:500;color:var(--muted)}.site-header nav a:hover{color:var(--ink)}
.button{display:inline-flex;align-items:center;justify-content:space-between;gap:22px;border:1px solid var(--line-2);padding:13px 18px;border-radius:4px;font-size:13.5px;font-weight:600;transition:background .2s,border-color .2s}
.button:hover{background:color-mix(in srgb,var(--ink) 7%,transparent);border-color:var(--ink);color:var(--ink)}
.button.small{font-size:12.5px;padding:11px 15px}
.primary{background:var(--accent);color:var(--accent-ink);border:0;padding:18px 22px;font-size:15px}.primary:hover{background:var(--accent);color:var(--accent-ink);filter:brightness(1.06)}

/* Stage ---------------------------------------------------------------- */
.experience{position:relative}
.stage{position:sticky;top:var(--header);height:calc(100svh - var(--header));width:66%;margin-left:34%;z-index:1;isolation:isolate;overflow:hidden;background:var(--stage-grid),var(--stage);transition:background .7s ease}
:root[data-theme=paper] .stage{background:var(--stage-grid),var(--stage)}
#viewport{position:absolute;inset:0}
#viewport canvas{position:absolute;inset:0;display:block;width:100%;height:100%;touch-action:pan-y;z-index:1;outline:none;cursor:grab}
#viewport canvas:active{cursor:grabbing}
.fallback{position:absolute;inset:0;width:100%;height:100%;object-fit:contain;opacity:0;transition:opacity .4s}
.stage.failed .fallback{opacity:1}
.stage::after{content:"";position:absolute;inset:0;background:linear-gradient(to bottom,var(--bg) 0,transparent 9%,transparent 90%,var(--bg) 100%);pointer-events:none;z-index:2;opacity:.75;transition:background .7s ease}
.stage-heading{position:absolute;top:22px;left:5%;right:5%;display:flex;align-items:center;gap:9px;font-size:11px;letter-spacing:.05em;z-index:3;pointer-events:none;color:var(--muted);text-transform:uppercase}
.live-dot{width:6px;height:6px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 3px color-mix(in srgb,var(--accent) 25%,transparent)}
.model-origin{margin-left:auto;color:var(--faint)}
.scene-tools{position:absolute;right:5%;top:56px;display:flex;gap:6px;z-index:4;align-items:stretch}
.scene-tools button,.seg{background:color-mix(in srgb,var(--panel) 88%,transparent);border:1px solid var(--line-2);border-radius:4px;font-size:12px;backdrop-filter:blur(10px);color:var(--ink-2);font-weight:500}
.scene-tools>button{padding:8px 12px}
.scene-tools button[aria-pressed=true]{color:var(--accent);border-color:var(--accent)}
.seg{display:flex;padding:3px;gap:2px}.seg button{border:0;border-radius:3px;padding:6px 11px;font-size:12px;color:var(--muted)}
.seg button[aria-pressed=true]{background:var(--ink);color:var(--bg);border-color:transparent}
.stage-cards{position:absolute;left:5%;top:60px;width:min(250px,calc(100% - 10%));display:grid;gap:8px;z-index:4;pointer-events:none}
.card{background:color-mix(in srgb,var(--panel) 92%,transparent);border:1px solid var(--line-2);border-radius:4px;padding:11px 12px;font-size:11.5px;line-height:1.45;color:var(--ink-2);backdrop-filter:blur(10px);box-shadow:0 8px 30px rgba(0,0,0,.12)}
.card b{display:block;font-weight:600;letter-spacing:.06em;text-transform:uppercase;font-size:10.5px;color:var(--accent);margin-bottom:8px}
.card>div{display:grid;grid-template-columns:12px 1fr auto;gap:8px;align-items:center;padding:2px 0}
.card.record>div{grid-template-columns:1fr auto}
.card i{width:11px;height:11px;border-radius:2px;display:block}
.card .dim{opacity:.45}.card small{display:block;margin-top:8px;color:var(--faint);font-size:10px}
.scene-bottom{position:absolute;bottom:30px;left:5%;right:5%;display:flex;align-items:flex-end;justify-content:space-between;gap:24px;z-index:3;pointer-events:none}
.scene-bottom p{max-width:380px;font-size:13px;margin:7px 0 0;line-height:1.5;color:var(--ink-2)}
.scene-bottom span{font-size:11px;color:var(--muted);letter-spacing:.06em}
.titleblock{display:grid;grid-template-columns:auto auto auto auto;border:1px solid var(--line-2);background:color-mix(in srgb,var(--panel) 90%,transparent);backdrop-filter:blur(10px);font-size:11px;letter-spacing:.04em;text-transform:uppercase;border-radius:3px;overflow:hidden}
.titleblock div{padding:8px 12px;border-right:1px solid var(--line)}.titleblock div:last-child{border-right:0}
.titleblock small{display:block;font-size:9.5px;color:var(--faint);margin-bottom:3px}.titleblock span{color:var(--ink);font-size:11px;letter-spacing:.02em}
#load-status{position:absolute;right:5%;top:98px;font-family:var(--mono);font-size:10.5px;color:var(--faint);z-index:3;pointer-events:none;letter-spacing:.04em;max-width:240px;text-align:right}
.stage.busy #load-status{color:var(--accent)}
.scene-progress{position:absolute;bottom:0;left:5%;right:5%;height:1px;background:var(--line-2)}.scene-progress span{display:block;height:1px;background:var(--accent);width:0;transition:width .25s}

/* Chapters ------------------------------------------------------------- */
.chapters{position:relative;z-index:2;margin-top:calc(-100svh + var(--header));pointer-events:none}
.chapter{min-height:calc(108svh - var(--header));padding:14svh 0 12svh;margin-left:5%;width:27%;display:flex;flex-direction:column;justify-content:center;pointer-events:auto}
.chapter[data-chapter=assembly]{min-height:420svh;justify-content:flex-start}.chapter .sticky{position:sticky;top:calc(var(--header) + 9svh)}
.chapter p{font-size:16px;line-height:1.65;color:var(--ink-2);max-width:420px;margin:0 0 26px}
.eyebrow{text-transform:uppercase;letter-spacing:.12em;font-size:10px;width:150%;max-width:560px;line-height:1.5;color:var(--accent);margin:0 0 26px;font-weight:500}
.tiny-cross{font-size:17px;margin-right:9px;vertical-align:-1px}
.chapter h1{font-weight:700;font-size:clamp(50px,5.6vw,88px);line-height:1.02;letter-spacing:-.045em;margin:0 0 30px;width:150%}
h1 em,h2 em{font-style:normal;color:var(--accent)}
h2{font-weight:700;font-size:clamp(32px,3.15vw,48px);letter-spacing:-.035em;line-height:1.08;margin:0 0 22px;width:140%;max-width:560px}
.hero .lede{font-size:18px;line-height:1.6;max-width:400px;color:var(--ink)}
.hero .hero-note{font-size:13.5px;line-height:1.6;color:var(--muted);border-left:2px solid var(--accent);padding-left:14px;max-width:380px}
.hero .hero-note b{font-weight:600;color:var(--ink-2)}
.scroll-cue{display:flex;justify-content:space-between;max-width:300px;margin-top:24px;padding-top:16px;border-top:1px solid var(--line);font-size:11.5px;color:var(--muted);letter-spacing:.03em;font-family:var(--mono)}
.scroll-cue span:last-child{font-size:17px;line-height:1}
.panel{background:var(--panel);border:1px solid var(--line-2);border-radius:6px;padding:20px;max-width:430px;margin:4px 0 16px;box-shadow:0 18px 50px rgba(0,0,0,.14);transition:background-color .7s ease,border-color .7s ease}
.tabs{display:flex;gap:3px;background:var(--bg-2);padding:3px;border-radius:4px;margin-bottom:20px;border:1px solid var(--line)}
.tabs button{flex:1;font-size:12px;font-weight:500;line-height:1.5;padding:8px 6px;border-radius:3px;color:var(--muted);white-space:nowrap;transition:background .2s}
.tabs button[aria-pressed=true]{background:var(--panel-2);color:var(--ink);box-shadow:0 1px 4px rgba(0,0,0,.18)}
.control-heading{display:flex;align-items:center;justify-content:space-between;gap:15px;margin-bottom:12px;font-size:13px;color:var(--ink-2);font-weight:500}
.control-heading output{font-size:20px;color:var(--accent);letter-spacing:-.03em;font-weight:600;font-variant-numeric:tabular-nums}
.control-heading select{background:var(--bg-2);border:1px solid var(--line-2);border-radius:3px;color:var(--ink);padding:7px 9px;font-size:12.5px}
input[type=range]{-webkit-appearance:none;appearance:none;width:100%;margin:12px 0 9px;height:22px;background:transparent;cursor:pointer}
input[type=range]::-webkit-slider-runnable-track{height:2px;background:var(--line-2)}input[type=range]::-moz-range-track{height:2px;background:var(--line-2)}
input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:18px;height:18px;margin-top:-8px;border-radius:50%;background:var(--accent);border:3px solid var(--panel);box-shadow:0 0 0 1px var(--accent)}
input[type=range]::-moz-range-thumb{width:14px;height:14px;border-radius:50%;background:var(--accent);border:3px solid var(--panel);box-shadow:0 0 0 1px var(--accent)}
input:disabled{opacity:.5;cursor:wait}
.range-labels{display:flex;justify-content:space-between;color:var(--faint);font-size:10.5px;letter-spacing:.04em}
.chapter .control-note{font-size:12.5px;line-height:1.6;margin:18px 0;color:var(--muted)}
.compact-metrics{border-top:1px solid var(--line);padding-top:16px;display:flex;gap:36px}
.compact-metrics strong,.proposal-metrics strong,.data-total strong,.recipe-strip b{display:block;font-size:28px;font-weight:600;letter-spacing:-.04em;font-variant-numeric:tabular-nums;color:var(--ink)}
.compact-metrics span,.proposal-metrics span{font-size:11px;color:var(--muted);display:block;margin-top:4px;font-family:var(--mono);letter-spacing:.03em}
.chapter .fine,.fine{font-size:11px;line-height:1.6;color:var(--faint);margin:0;max-width:420px;letter-spacing:.01em}
.data-total{display:grid;grid-template-columns:auto 1fr;gap:4px 12px;align-items:baseline;padding-bottom:16px;margin-bottom:16px;border-bottom:1px solid var(--line)}
.data-total strong{font-size:26px}.data-total span{font-size:11px;color:var(--muted);font-family:var(--mono)}
.mini-label,.chapter .mini-label{display:block;font-size:10px;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);margin:0 0 10px}
.mix-row{display:grid;grid-template-columns:96px 1fr 58px;gap:10px;align-items:center;width:100%;padding:6px 0;text-align:left;font-size:12px;color:var(--ink-2);opacity:.85;font-family:var(--mono)}
.mix-row:hover,.mix-row[aria-pressed=true]{opacity:1;color:var(--ink)}
.mix-row .bar{height:8px;border-radius:1px;background:var(--bg-2);overflow:hidden}.mix-row .bar i{display:block;height:8px;background:var(--bar);border-radius:1px}
.mix-row b{text-align:right;font-weight:400;font-variant-numeric:tabular-nums;white-space:nowrap}
.mix-row[aria-pressed=true]{outline:1px solid var(--line-2);outline-offset:3px;border-radius:2px}
.data-panel[data-mode=finish] .mix-row{grid-template-columns:82px 1fr 74px}
.panel-actions{display:flex;gap:18px;border-top:1px solid var(--line);margin-top:16px;padding-top:4px}
.panel-actions .text-button{border-top:0;margin-top:0;padding-top:12px}
.text-button{display:flex;justify-content:space-between;width:100%;text-align:left;margin-top:16px;padding:13px 0 0;border-top:1px solid var(--line);font-size:12px;font-weight:600;color:var(--accent);gap:10px}
.text-button[aria-pressed=true]{color:var(--hot)}
.recipe-strip{display:flex;align-items:center;justify-content:space-between;padding:22px 0 4px;gap:6px}
.recipe-strip span{font-size:10px;color:var(--muted);letter-spacing:.03em}.recipe-strip b{font-size:26px;margin-bottom:5px}.recipe-strip i{color:var(--faint);font-style:normal}

.assembly-steps{display:grid;gap:8px;margin:4px 0 20px;max-width:430px}
.assembly-steps>button{display:flex;align-items:flex-start;gap:14px;padding:14px 16px;text-align:left;border:1px solid var(--line);border-radius:5px;background:color-mix(in srgb,var(--panel) 70%,transparent);transition:border-color .2s,background .2s}
.assembly-steps>button>span{font-size:11px;color:var(--faint);padding-top:3px;min-width:18px}
.assembly-steps strong{display:block;font-size:14px;font-weight:600;color:var(--ink-2);margin-bottom:5px}
.assembly-steps small{font-size:12px;line-height:1.5;color:var(--muted);display:block}
.assembly-steps>button[aria-pressed=true]{background:var(--panel);border-color:var(--accent)}
.assembly-steps>button[aria-pressed=true] strong,.assembly-steps>button[aria-pressed=true]>span{color:var(--accent)}

.sheets{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;max-width:460px;margin:4px 0 14px}
.sheets a{display:block;background:#fff;border:1px solid var(--line-2);border-radius:3px;overflow:hidden;color:var(--muted);transition:border-color .2s,transform .2s}
.sheets a:hover{border-color:var(--accent);transform:translateY(-2px)}
.sheets .thumb{display:block;aspect-ratio:1.5;overflow:hidden;background:#fff;padding:8px}.sheets img{display:block;width:190%;max-width:none;height:auto;transform:translate(-24%,-24%)}
.sheets span{display:block;font-size:9.5px;letter-spacing:.05em;text-transform:uppercase;padding:6px 8px;border-top:1px solid var(--line);background:var(--panel);color:var(--muted)}

.proposal{max-width:430px;border:1px solid var(--line-2);background:var(--panel);border-radius:6px;overflow:hidden;box-shadow:0 18px 50px rgba(0,0,0,.14);margin-bottom:16px}
.proposal .who{display:flex;gap:10px;align-items:center;padding:11px 16px;border-bottom:1px solid var(--line);font-size:10.5px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}
.proposal .who i{width:8px;height:8px;background:var(--hot);border-radius:50%}
.bubble{padding:14px 16px;border-bottom:1px solid var(--line);font-size:13.5px;line-height:1.55;color:var(--ink-2)}
.bubble small{display:block;font-size:10px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin-bottom:6px}
.bubble.ai{background:color-mix(in srgb,var(--accent) 7%,transparent);color:var(--ink)}.bubble.ai small{color:var(--accent)}.bubble b{font-weight:700;color:var(--ink)}
.proposal .tabs{margin:12px 16px 0;}
.proposal .control-note{margin:14px 16px}
.decide{display:flex;gap:8px;padding:0 16px 16px}
.decide span{flex:1;text-align:center;padding:10px;font-size:12.5px;font-weight:600;border:1px solid var(--line-2);border-radius:3px;color:var(--muted)}
.decide span:first-child{background:var(--accent);border-color:var(--accent);color:var(--accent-ink)}
.proposal .text-button{padding:12px 16px 14px;margin:0}

.project-downloads{margin:24px 0 14px;font-size:12px;max-width:430px}
.project-downloads a{display:flex;justify-content:space-between;padding:14px 0;border-bottom:1px solid var(--line);gap:15px;color:var(--ink-2)}
.finale .button{align-self:flex-start;margin-top:4px}


footer{position:relative;z-index:5;display:flex;align-items:center;gap:25px;padding:28px 5%;border-top:1px solid var(--line);background:var(--bg)}
footer p{font-size:11.5px;color:var(--muted);max-width:640px;line-height:1.5}
footer>div{display:flex;gap:24px;margin-left:auto;font-size:11px;color:var(--ink-2)}footer button{font-size:11.5px;padding:0;font-weight:600}
dialog{width:min(1000px,92vw);max-height:88svh;border:1px solid var(--line-2);border-radius:8px;background:var(--panel);color:var(--ink);padding:30px;box-shadow:0 30px 100px rgba(0,0,0,.5)}
dialog::backdrop{background:rgba(6,11,14,.82);backdrop-filter:blur(12px)}
dialog .dialog-top{display:flex;justify-content:space-between;align-items:flex-start;gap:25px}dialog .dialog-top .eyebrow{margin-bottom:12px}
dialog h2{font-size:30px;width:auto}dialog p{font-size:14px;line-height:1.65;color:var(--ink-2)}dialog .dialog-top button{font-size:26px;padding:0 6px}
#about-dialog{max-width:640px}#about-dialog .button{margin-top:20px}
#graph-tabs{max-width:590px;margin-top:24px}
#graph-canvas{height:45svh;min-height:290px;overflow:auto;border:1px solid var(--line);border-radius:4px;background:radial-gradient(var(--line-2) 1px,transparent 1px) 0 0/18px 18px;margin-bottom:15px;position:relative}
.graph-inner{position:relative}.graph-inner svg{position:absolute;inset:0;pointer-events:none}
.graph-node{position:absolute;width:172px;min-height:60px;padding:10px 12px;background:var(--panel-2);border:1px solid var(--line-2);border-radius:4px;box-shadow:0 2px 10px rgba(0,0,0,.14)}
.graph-node strong{font-weight:600;font-size:11px;line-height:1.3;display:block;color:var(--ink)}
.graph-node span{font-family:var(--mono);font-size:9.5px;color:var(--muted);display:block;margin-top:6px}
.graph-node.control{border-color:var(--accent)}
.graph-link{stroke:var(--accent);stroke-opacity:.45;stroke-width:1.25;fill:none}
.noscript{padding:20px;text-align:center}

/* Responsive ----------------------------------------------------------- */
@media(min-width:1700px){.chapter{width:25%;margin-left:7%}.stage{width:66%;margin-left:34%}}
@media(max-width:1050px) and (min-width:761px){.chapter{width:33%;margin-left:4%}.stage{width:63%;margin-left:37%}.chapter h1{font-size:54px;width:130%}h2{width:120%}.chapter p{font-size:14px}.panel{padding:15px}.model-origin{display:none}.site-header nav{display:none}.scene-tools .seg{display:none}.titleblock div:nth-child(4){display:none}}
@media(max-width:760px){
 :root{--header:64px}
 .site-header{padding:0 18px;gap:12px}.site-header img{width:150px;height:39px}.site-header nav{display:none}.site-header .button{font-size:11px;padding:9px 12px;gap:10px}
 .stage{width:100%;margin:0;height:46svh;min-height:300px;max-height:460px;top:var(--header);z-index:4;border-bottom:1px solid var(--line)}
 /* On phones the page scrolls below the model; any touch on the model orbits it. */
 .stage{touch-action:none}
 .stage::after{display:none}
 .stage-heading{top:14px;left:16px;right:16px;font-size:9.5px}.model-origin{display:none}
 .scene-tools{top:38px;right:16px;gap:4px}.scene-tools>button{padding:6px 9px;font-size:10.5px}.seg button{padding:5px 8px;font-size:10.5px}
 .stage-cards{left:16px;top:82px;width:168px}.card{font-size:10px;padding:8px 9px}.card>div{grid-template-columns:10px 1fr}.card>div span:last-child{display:none}.card.record>div{grid-template-columns:1fr auto}.card.record>div span:last-child{display:block}
 .scene-bottom{bottom:12px;left:16px;right:16px;gap:12px}.scene-bottom p{display:none}.scene-bottom span{font-size:9.5px}
 .titleblock{grid-template-columns:auto auto}.titleblock div:nth-child(2),.titleblock div:nth-child(4){display:none}.titleblock div{padding:5px 9px}
 #load-status{display:none}
 .chapters{margin-top:0}
 .chapter{min-height:auto;padding:56px 22px 64px;margin:0;width:100%;max-width:560px;margin-inline:auto}
 .chapter[data-chapter=assembly]{min-height:auto}
 .chapter+.chapter{border-top:1px solid var(--line)}
 .chapter.hero{padding-top:34px;padding-bottom:50px}
 .eyebrow{margin-bottom:18px;font-size:9.5px;width:100%}
 .chapter h1{font-size:clamp(46px,10.5vw,68px);line-height:1;width:100%;letter-spacing:-.045em;margin-bottom:22px}
 .hero .lede{font-size:15px;max-width:none}
 h2{font-size:34px;margin-bottom:18px;width:100%}
 .chapter>p{font-size:15px;max-width:none}
 .panel,.proposal,.assembly-steps,.sheets,.project-downloads{max-width:none}
 .sheets{grid-template-columns:repeat(2,minmax(0,1fr))}
 .chapter .sticky{position:static}
 .scene-progress{display:none}
 footer{flex-wrap:wrap;padding:24px 22px;gap:14px}footer img{width:130px;height:34px}footer>div{margin:0;width:100%;padding-top:8px}
 dialog{padding:22px;max-height:86svh}dialog h2{font-size:25px}#graph-tabs{flex-wrap:wrap}#graph-tabs button{min-width:35%}
 .finale .button{width:100%}
}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{transition:none!important}}
/* Shared page navigation remains available on small screens. */
.global-header nav a[aria-current=page]{color:var(--ink)}
.global-header nav{display:flex}
.global-header>a{flex-shrink:0}
html{scroll-padding-top:calc(var(--header) + 16px)}
@media(max-width:760px){
 :root{--header:104px}
 .global-header{height:var(--header);flex-wrap:wrap;align-content:center;row-gap:10px;padding-block:9px}
 .global-header nav{order:3;width:100%;justify-content:space-between;gap:14px;font-size:11px}
 .global-header nav a{padding:5px 0}
 .global-header .button{margin-left:auto}
}
/* Orbit hint, floor stack (cut at), floor buttons, wave controls, sheet viewer */
.orbit-hint{position:absolute;left:5%;bottom:8px;font-family:var(--mono);font-size:10px;letter-spacing:.04em;color:var(--faint);z-index:3;pointer-events:none}
.floor-stack{position:absolute;right:5%;top:50%;transform:translateY(-50%);display:flex;flex-direction:column;gap:4px;z-index:4;padding:8px;background:color-mix(in srgb,var(--panel) 90%,transparent);border:1px solid var(--line-2);border-radius:6px;backdrop-filter:blur(12px);box-shadow:0 10px 30px rgba(0,0,0,.16)}
.floor-stack[hidden]{display:none}
.floor-stack small{font-family:var(--mono);font-size:9.5px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);text-align:center;margin-bottom:2px}
.floor-stack button{font-family:var(--mono);font-size:12px;min-width:48px;padding:7px 10px;border:1px solid var(--line-2);border-radius:4px;color:var(--ink-2);background:var(--panel)}
.floor-stack button[aria-pressed=true]{background:#ff7a2f;border-color:#ff7a2f;color:#1a1a1a;font-weight:600}
.wave-panel .mini-label{margin-top:6px}.wave-panel .mini-label:not(:first-child){margin-top:18px}
.wave-panel input[type=range]{margin:4px 0 10px}
.wave-panel .panel-actions{display:flex;flex-wrap:wrap;gap:6px 18px}
.sheet-dialog{width:min(1200px,94vw);max-width:none;height:min(900px,92svh);display:none;flex-direction:column}
.sheet-dialog[open]{display:flex}
.sheet-dialog .dialog-top{align-items:flex-start}
.sheet-tools{display:flex;gap:8px;align-items:center}.sheet-tools .seg{display:flex;padding:3px;gap:3px}.sheet-tools .seg button{padding:6px 10px;border-radius:3px;font-size:12px}.sheet-tools .seg button[aria-pressed=true]{background:var(--accent);color:var(--bg)}
.sheet-scroll{flex:1;min-height:0;overflow:auto;background:#fff;border:1px solid var(--line);border-radius:4px;margin-bottom:12px;cursor:grab;overscroll-behavior:contain}
.sheet-scroll:active{cursor:grabbing}
#sheet-image{display:block;width:100%;height:auto;max-width:none;user-select:none;-webkit-user-drag:none}
@media(max-width:760px){.floor-stack{right:10px;top:auto;bottom:44px;transform:none;flex-direction:row;padding:5px;gap:3px}.floor-stack small{display:none}.floor-stack button{min-width:0;padding:5px 7px;font-size:10.5px}.orbit-hint{display:none}.sheet-dialog{width:100vw;height:92svh}}
/* Link and action icons: the app's Lucide shapes, drawn in the text colour.
   Arrow characters such as ↗ fall back to colour emoji on iOS. */
.icon{display:inline-block;flex:none;align-self:center;width:1.05em;height:1.05em;vertical-align:-.16em;background:currentColor;-webkit-mask:var(--icon) center/contain no-repeat;mask:var(--icon) center/contain no-repeat}
.icon-external{--icon:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23000' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M7 7h10v10'/%3E%3Cpath d='M7 17 17 7'/%3E%3C/svg%3E")}
.icon-down{--icon:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23000' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M12 5v14'/%3E%3Cpath d='m19 12-7 7-7-7'/%3E%3C/svg%3E")}
.icon-reset{--icon:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23000' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M3 12a9 9 0 1 0 9-9 9.75 9.75 0 0 0-6.74 2.74L3 8'/%3E%3Cpath d='M3 3v5h5'/%3E%3C/svg%3E")}