@font-face{font-family:Instrument;src:url('/assets/instrument-sans.woff2') format('woff2');font-weight:400 700;font-display:swap}
@font-face{font-family:SourceSerif;src:url('/assets/source-serif.woff2') format('woff2');font-weight:200 900;font-display:swap}
:root{
  --paper:#f3f0e8;--ink:#282721;--accent:#983c2c;
  --body:#565348;--muted:#686256;--line:#d0cabd;
  --sans:Instrument,sans-serif;--serif:SourceSerif,serif;
  --ease-out:cubic-bezier(.22,1,.36,1);
}
*{box-sizing:border-box}
[hidden]{display:none!important}
.icon{display:block;width:24px;height:24px;flex:none;overflow:visible}
html{scroll-behavior:smooth;scroll-padding-top:24px}
body{margin:0;background:var(--paper);color:var(--ink);font:15px/1.65 var(--sans);-webkit-font-smoothing:antialiased}
h1,h2,p,figure{margin:0}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;border:0;background:none;cursor:pointer}
button,a{-webkit-tap-highlight-color:transparent;touch-action:manipulation}
a:focus-visible,button:focus-visible,[tabindex]:focus-visible{outline:2px solid var(--accent);outline-offset:5px}
::selection{background:#dfb8a7}
.shell{width:min(1320px,calc(100% - 112px));margin-inline:auto}
.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:10px;left:15px;z-index:20;opacity:0;pointer-events:none;background:var(--ink);color:var(--paper);padding:9px 14px}
.skip-link:focus{opacity:1;pointer-events:auto}

.site-header{height:88px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:24px}
.wordmark{font-family:var(--serif);font-size:31px;line-height:1;font-weight:600;letter-spacing:-1.7px;display:flex;gap:10px;align-items:center;flex-shrink:0}
.brand-mark{color:var(--accent);display:flex;align-items:center}
.header-note{font-size:13px;color:var(--muted);margin-right:auto;margin-left:35px}
.site-header nav{display:flex;align-items:center;gap:25px;font-size:14px;white-space:nowrap}

.nav-open{display:flex;gap:24px;align-items:center;min-height:44px}
.link-icon{position:relative;display:block;flex:none;width:20px;height:20px;overflow:hidden}
.link-icon .icon{position:absolute;inset:0;width:20px;height:20px;transition:transform .42s var(--ease-out)}
.link-icon .icon:last-child{transform:translate(-115%,115%)}
.link-label{position:relative}
.link-label:after{content:'';position:absolute;left:0;right:0;bottom:-3px;height:1px;background:currentColor;transform:scaleX(0);transform-origin:right;transition:transform .3s var(--ease-out)}
.nav-open,.site-footer a{transition:color .2s}
.nav-open:focus-visible .link-label:after,.site-footer a:focus-visible .link-label:after{transform:scaleX(1);transform-origin:left}
a:focus-visible .link-icon .icon:first-child{transform:translate(115%,-115%)}
a:focus-visible .link-icon .icon:last-child{transform:translate(0,0)}

.hero{display:grid;grid-template-columns:.88fr 1.12fr;gap:20px;align-items:center;min-height:620px;padding:30px 0 33px}
.hero-copy{position:relative;z-index:1;padding:27px 0 0;min-width:0}
.eyebrow{display:flex;align-items:center;gap:10px;font-size:11px;letter-spacing:.08em;margin-bottom:26px;color:var(--accent)}
.tiny-branch{display:flex;align-items:center}.tiny-branch .icon{width:21px;height:21px}
.hero h1{font-family:var(--serif);font-weight:400;font-size:clamp(55px,5.35vw,80px);line-height:1.055;letter-spacing:-.057em;white-space:nowrap}
.straight{position:relative;display:inline-block}
.straight:after{content:'';position:absolute;top:59%;left:-2%;width:104%;height:2px;background:var(--accent);transform:rotate(-9deg);pointer-events:none}
.hero-body{margin-top:25px;font-size:16px;line-height:1.85;color:var(--body);max-width:425px;text-wrap:pretty}
.primary-link{display:inline-flex;align-items:center;justify-content:space-between;gap:27px;min-height:48px;background:var(--ink);color:var(--paper);padding:13px 22px;font-size:14px;line-height:1.4;margin-top:27px;box-shadow:inset 0 0 0 1px #ffffff12;transition:background .25s,transform .18s var(--ease-out),box-shadow .25s}
.primary-link:active{transform:translateY(1px);box-shadow:inset 0 2px 3px #00000026}
.primary-link:focus-visible{background:#394238}
.hero-footnote{font-size:12px;color:var(--muted);margin-top:14px;line-height:1.8}
.spatial-figure{align-self:stretch;display:flex;flex-direction:column;min-width:0;position:relative}
.scene-meta{display:flex;justify-content:space-between;gap:15px;font-size:11px;letter-spacing:.07em;color:var(--muted);margin:15px 10px 0 34px}
.scene-meta>span:last-child{color:var(--accent);white-space:nowrap;font-variant-numeric:tabular-nums}
.paper-stage{position:relative;isolation:isolate;width:100%;min-height:470px;flex:1;cursor:grab;touch-action:pan-y;outline-offset:-4px!important;user-select:none;-webkit-user-select:none}
.paper-stage.is-dragging{cursor:grabbing}
.paper-stage[data-renderer=fallback]{cursor:default}
.paper-stage canvas{position:absolute;inset:0;width:100%;height:100%;display:block;opacity:0;transition:opacity .35s}
.paper-stage[data-renderer=webgl] canvas{opacity:1}
.paper-stage[data-renderer=webgl] .fallback-art{visibility:hidden}
.scene-caption{font-size:12px;color:var(--body);display:flex;justify-content:space-between;align-items:center;gap:16px;padding:0 2px 10px 35px}
.drag-cue{display:flex;align-items:center;gap:10px}
.drag-cue>.icon{width:20px;height:20px;color:var(--accent);transition:transform .2s}
.drag-cue{min-height:44px}.drag-cue.is-active>.icon{transform:scaleX(1.15)}
#reset-view{display:inline-flex;align-items:center;gap:7px;font-size:12px;min-height:44px;padding:10px 9px;color:var(--body);white-space:nowrap;transition:background .2s,color .2s}
#reset-view .icon{width:17px;height:17px;transition:transform .4s var(--ease-out)}
#reset-view:disabled{color:var(--muted);cursor:default}
#reset-view:enabled>span{text-decoration:underline;text-decoration-color:#b0a797;text-underline-offset:5px}
#reset-view.is-resetting .icon{animation:reset-turn .55s var(--ease-out)}
@keyframes reset-turn{from{transform:rotate(0)}to{transform:rotate(-360deg)}}

.fallback-art{position:absolute;inset:40px 12px 30px;display:flex;align-items:center;justify-content:center;perspective:1000px;pointer-events:none}
.fallback-sheet{width:35%;max-width:230px;height:340px;flex-shrink:0;padding:20px;background:#e6dfca;box-shadow:4px 12px 25px #3e35251c;display:flex;flex-direction:column;justify-content:space-between;border:1px solid #d2c8ae;transition:transform .7s}
.fallback-sheet small{font-size:10px;letter-spacing:.04em}
.fallback-sheet b{font-family:var(--serif);font-size:22px;font-weight:400}
.fallback-sheet svg{height:220px;width:100%}
.sheet-one{transform:translateX(18%) rotate(-10deg) rotateY(-20deg);z-index:3;color:#31372c;background:#ebe5d2}
.sheet-two{transform:translateY(-25px) rotate(2deg);z-index:2;color:#a04434;background:#ece8de}
.sheet-three{transform:translateX(-18%) rotate(9deg) rotateY(20deg);z-index:1;color:#e9dfba;background:#333e35}
.fallback-orbits{width:90%;aspect-ratio:1;border-radius:50%;border:1px solid currentColor;position:relative;background:repeating-radial-gradient(ellipse at center,transparent 0 8px,#a0443460 9px 9.5px,transparent 10px 12px)}
.paper-stage[data-mode='1'] .sheet-one{transform:translateX(5%) rotate(-5deg)}
.paper-stage[data-mode='1'] .sheet-three{transform:translateX(-5%) rotate(5deg)}
.paper-stage[data-mode='2'] .sheet-one{transform:translateX(43%) rotate(-9deg)}
.paper-stage[data-mode='2'] .sheet-two{transform:translateY(-10px)}
.paper-stage[data-mode='2'] .sheet-three{transform:translateX(-43%) rotate(8deg)}

.field-notes{display:grid;grid-template-columns:.88fr 1.12fr;gap:20px;padding:33px 0 34px;border-top:1px solid var(--line)}
.notes-intro{display:flex;align-items:flex-start;gap:28px;padding-top:11px}
.section-index{font-size:11px;letter-spacing:.04em;color:var(--accent);padding-top:7px;white-space:nowrap}
.notes-intro h2{font-family:var(--serif);font-size:28px;font-weight:400;letter-spacing:-.025em;line-height:1.35}
.notes-content{min-width:0}
.chapter-tabs{--tab-gap:28px;--active-step:0;position:relative;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));border-bottom:1px solid var(--line);gap:var(--tab-gap)}
.chapter-tabs[data-active="1"]{--active-step:1}.chapter-tabs[data-active="2"]{--active-step:2}
.chapter-tabs button{position:relative;display:flex;gap:12px;align-items:center;flex:1;min-width:0;min-height:48px;padding:9px 0 13px;text-align:left;font-size:15px;color:var(--body);transition:color .2s,background .2s}
.tab-number{font-size:11px;font-variant-numeric:tabular-nums}
.tab-icon{display:flex;margin-left:auto;flex:none}.tab-icon .icon{width:21px;height:21px}
.branch-arm{transform-origin:6px 14px;transition:transform .35s var(--ease-out)}
.compare-out,.compare-back{transition:transform .35s var(--ease-out)}
.chapter-tabs button[aria-selected=true] .connect-path{animation:connect-lines .6s var(--ease-out)}
.chapter-tabs button[aria-selected=true] .branch-arm{animation:branch-open .5s var(--ease-out)}
.chapter-tabs button[aria-selected=true] .compare-out{animation:compare-out .5s var(--ease-out)}
.chapter-tabs button[aria-selected=true] .compare-back{animation:compare-back .5s var(--ease-out)}
@keyframes connect-lines{from{stroke-dasharray:1;stroke-dashoffset:1}to{stroke-dasharray:1;stroke-dashoffset:0}}
@keyframes branch-open{from{transform:rotate(-22deg)}to{transform:rotate(0)}}
@keyframes compare-out{from{transform:translateX(-3px)}to{transform:translateX(0)}}
@keyframes compare-back{from{transform:translateX(3px)}to{transform:translateX(0)}}
.chapter-tabs button[aria-selected=true]{color:var(--accent)}
.tab-indicator{position:absolute;bottom:-1px;left:0;height:2px;width:calc((100% - 2 * var(--tab-gap))/3);background:var(--accent);transform:translateX(calc(var(--active-step) * (100% + var(--tab-gap))));transition:transform .42s var(--ease-out);pointer-events:none}
.chapter-panels{display:grid}
.chapter-panel{grid-area:1/1;padding-top:18px;display:flex;flex-direction:column;align-items:flex-start;gap:10px;min-height:133px;visibility:hidden;opacity:0;transform:translateY(5px);pointer-events:none;transition:opacity .12s ease,transform .18s var(--ease-out),visibility .12s}
.chapter-panel.is-active{visibility:visible;opacity:1;transform:none;pointer-events:auto;transition:opacity .24s ease .12s,transform .3s var(--ease-out) .12s,visibility 0s}
.chapter-panel p{font-size:14px;line-height:1.9;color:var(--body);max-width:540px;text-wrap:pretty}
.chapter-detail{font-size:12px;color:var(--muted);line-height:1.8}
.site-footer{display:flex;align-items:center;justify-content:space-between;gap:25px;border-top:1px solid var(--line);padding:20px 0 24px;font-size:12px;color:var(--muted)}
.site-footer>span:nth-child(2){font-family:var(--serif);font-size:14px;color:var(--body)}
.site-footer a{color:var(--body);display:inline-flex;align-items:center;gap:12px;min-height:44px}
.site-footer .link-icon,.site-footer .link-icon .icon{width:17px;height:17px}

@media(hover:hover){
  #reset-view:enabled:hover{background:#e7e1d6;color:var(--ink)}
  #reset-view:enabled:hover:not(.is-resetting) .icon{transform:rotate(-35deg)}
  .nav-open:hover,.site-footer a:hover{color:var(--accent)}
  a:hover .link-icon .icon:first-child{transform:translate(115%,-115%)}
  a:hover .link-icon .icon:last-child{transform:translate(0,0)}
  .nav-open:hover .link-label:after,.site-footer a:hover .link-label:after{transform:scaleX(1);transform-origin:left}
  .primary-link:hover{background:#394238;box-shadow:inset 0 0 0 1px #ffffff20,0 3px 0 #28272112}
  .chapter-tabs button:hover{color:var(--accent)}
  .chapter-tabs button:hover .branch-arm{transform:rotate(-8deg)}
  .chapter-tabs button:hover .compare-out{transform:translateX(1.5px)}
  .chapter-tabs button:hover .compare-back{transform:translateX(-1.5px)}
}
.chapter-tabs button:focus-visible .branch-arm{transform:rotate(-8deg)}
.chapter-tabs button:focus-visible .compare-out{transform:translateX(1.5px)}
.chapter-tabs button:focus-visible .compare-back{transform:translateX(-1.5px)}
.chapter-tabs button:active{background:#e7e1d680}
@media(min-width:1550px){.hero{min-height:700px}.paper-stage{min-height:540px}.hero h1{font-size:81px}}
@media(max-width:1100px){
  .shell{width:calc(100% - 80px)}.header-note{margin-left:10px}
  .hero{grid-template-columns:.9fr 1.1fr;min-height:600px}.hero h1{font-size:56px}
  .hero-body{font-size:15px;max-width:355px}.hero-body br{display:none}.primary-link{font-size:13px;padding:13px 18px;gap:18px}
  .scene-meta{margin-left:20px;letter-spacing:.04em}.scene-caption{padding-left:20px}.paper-stage{min-height:435px}
  .notes-intro{gap:20px}.notes-intro h2{font-size:25px}.chapter-tabs{--tab-gap:20px}.tab-number{display:none}
  .field-notes{padding-block:29px 30px}.fallback-sheet{height:290px;padding:15px}.fallback-sheet b{font-size:19px}
  
}
@media(max-width:800px){
  .shell{width:calc(100% - 48px)}.site-header{height:76px}.header-note{display:none}
  .hero{grid-template-columns:1fr 1fr;min-height:540px;gap:0}.hero-copy{padding-top:0}.hero h1{font-size:46px}
  .eyebrow{font-size:11px;letter-spacing:.02em;margin-bottom:21px;gap:7px}
  .hero-body{font-size:14px}.primary-link{font-size:12px;padding:13px 14px;gap:13px}.hero-footnote{font-size:12px;max-width:290px}
  .paper-stage{min-height:375px}.scene-meta{font-size:11px;margin-left:17px;gap:10px;letter-spacing:0}
  .scene-meta>span:first-child{max-width:210px}.scene-caption{font-size:12px;padding-left:17px;gap:9px}.drag-cue{gap:7px}
  .field-notes{grid-template-columns:1fr 1fr;gap:28px}.notes-intro{gap:16px}.notes-intro h2{font-size:23px}
  .chapter-tabs{--tab-gap:16px}.chapter-tabs button{font-size:14px;gap:8px}.tab-icon .icon{width:18px;height:18px}
  .site-footer{gap:18px}.site-footer>span:nth-child(2){max-width:245px;text-align:center;font-size:13px}
  .fallback-sheet{height:230px;padding:10px}.fallback-sheet b{font-size:15px}.fallback-sheet small{font-size:9px}.fallback-sheet svg{height:140px}

}
@media(max-width:700px){
  .shell{width:calc(100% - 44px)}.site-header{height:74px;gap:14px}.wordmark{font-size:29px;gap:8px}.brand-mark .icon{width:22px;height:22px}
  .site-header nav{gap:12px;font-size:13px}.nav-open{gap:9px}
  .hero{display:flex;flex-direction:column;gap:14px;min-height:0;padding:37px 0 12px;align-items:stretch}.hero-copy{padding:0}
  .eyebrow{font-size:11px;letter-spacing:.06em;margin-bottom:19px}
  .hero h1{font-size:clamp(42px,10.9vw,61px);line-height:1.07;letter-spacing:-.058em}
  .hero-body{font-size:15px;line-height:1.85;margin-top:22px;max-width:350px}.hero-body br{display:none}
  .primary-link{font-size:14px;margin-top:22px;padding:13px 18px;gap:24px}.hero-footnote{font-size:12px;max-width:none;margin-top:13px}
  .spatial-figure{margin-top:19px}.scene-meta{margin:0;font-size:11px}.scene-meta>span:first-child{max-width:none}
  .paper-stage{min-height:290px;height:290px;flex:auto;margin-top:2px}.scene-caption{padding:0 0 6px;margin-top:-4px}
  #reset-view{padding-right:0;padding-left:10px}.field-notes{display:block;padding:24px 0 25px}
  .notes-intro{gap:24px;align-items:center;padding:0;margin-bottom:21px}.notes-intro h2{font-size:26px}.notes-intro h2 br{display:none}.section-index{padding:0}
  .chapter-tabs{--tab-gap:18px}.tab-number{display:inline}.chapter-tabs button{font-size:15px;gap:7px;padding-bottom:12px}.tab-icon .icon{width:18px;height:18px}
  .chapter-panel{min-height:154px;padding-top:16px;gap:10px}.chapter-panel p{font-size:14px;line-height:1.9}.chapter-detail{font-size:12px}
  .site-footer{padding:14px 0 19px;gap:13px}.site-footer>span:nth-child(2){display:none}
  .fallback-art{inset:18px 8px 20px}.fallback-sheet{height:230px;max-width:160px;padding:12px}.fallback-sheet b{font-size:15px}

}
@media(max-width:440px){.chapter-tabs .tab-number{display:none}}
@media(max-width:380px){
  .site-header{gap:10px}.site-header nav{gap:8px}.nav-open{gap:7px}
  .chapter-tabs{--tab-gap:16px}.tab-number{display:none}.chapter-tabs button{font-size:14px;gap:4px}.tab-icon .icon{width:16px;height:16px}
  .notes-intro{display:block}.section-index{display:block;margin-bottom:10px}.notes-intro h2 br{display:block}
  .hero h1{font-size:41px}.hero-body{font-size:14px}.hero-footnote{font-size:12px}
  .scene-meta{font-size:11px;gap:7px}.scene-caption{font-size:12px;gap:7px}.drag-cue{gap:7px}
  
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}*,*:before,*:after{transition:none!important;animation:none!important}
  a:is(:hover,:focus-visible) .link-icon .icon:first-child{transform:none}
  .link-icon .icon:last-child{display:none}
  .chapter-panel{transform:none}
}