/* Layout: a research paper wrapped in an operating system. White paper sections set like a preprint (small caps, justified serif, mono chips); full-bleed black bands carry the thesis, index rows and the writing carousel. Deliberately single-theme. */
:root{
  color-scheme:light;
  --paper:#FCFCFB; --band:#F1F1EE; --ink:#0B0C0E; --muted:#686B70; --rule:#DADAD5;
  --night:#0A0B0D; --night-2:#141619; --night-ink:#ECEDEE; --night-muted:#8A8F96; --night-rule:#26292E;
  --serif:"STIX Two Text","Latin Modern Roman","Times New Roman",Georgia,serif;
  --sans:"Geist","Helvetica Neue",Helvetica,Arial,sans-serif;
  --mono:"Geist Mono",ui-monospace,Menlo,Consolas,monospace;
  --wrap:1240px; --text:680px;
}
*{box-sizing:border-box}
[hidden]{display:none!important}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);font-size:16px;line-height:1.55;-webkit-font-smoothing:antialiased}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{animation:none!important;transition:none!important}}
a{color:inherit}
h1,h2,h3{margin:0;text-wrap:balance;font-weight:400}
p{margin:0}
:focus-visible{outline:2px solid currentColor;outline-offset:3px}
.wrap{max-width:var(--wrap);margin-inline:auto;padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}
.text{max-width:var(--text);margin-inline:auto}
.eyebrow{font-family:var(--mono);font-size:.72rem;letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}
.dark .eyebrow{color:var(--night-muted)}

/* chips (preprint style) */
.chip{display:inline-flex;align-items:center;gap:8px;font-family:var(--mono);font-size:.78rem;padding:5px 10px;border-radius:4px;background:var(--band);color:var(--ink);border:0;line-height:1.4}
button.chip{cursor:pointer}
button.chip:hover{background:var(--rule)}

/* header */
.top{position:sticky;top:env(safe-area-inset-top,0px);z-index:30;background:color-mix(in srgb,var(--paper) 90%,transparent);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--rule)}
.top .wrap{display:flex;align-items:center;gap:28px;height:56px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-weight:500;letter-spacing:-.01em}
.top nav{display:flex;gap:26px;margin-left:auto;font-size:.88rem}
.top nav a{text-decoration:none;color:var(--muted)}
.top nav a:hover{color:var(--ink)}
.lang{display:flex;gap:2px;font-family:var(--mono);font-size:.72rem}
.lang button{all:unset;cursor:pointer;padding:5px 8px;border-radius:3px;color:var(--muted)}
.lang button[aria-pressed="true"]{background:var(--ink);color:var(--paper)}
.lang button:focus-visible{outline:2px solid var(--ink)}
@media (max-width:820px){.top nav{display:none}.lang{margin-left:auto}}

/* hero (preprint title page) */
.hero{padding-block:clamp(56px,9vw,120px) clamp(48px,7vw,88px);text-align:center}
.hero .mark{display:block;margin:0 auto 40px}
.hero h1{font-family:var(--serif);font-variant:small-caps;font-size:clamp(2rem,5vw,4.2rem);line-height:1.08;max-width:18ch;margin-inline:auto;letter-spacing:.005em;font-weight:400}
.hero .sub{font-family:var(--serif);font-size:clamp(1.12rem,1.9vw,1.35rem);line-height:1.5;color:var(--ink);max-width:40ch;margin:26px auto 0}
.meta-row{display:flex;flex-wrap:wrap;justify-content:center;gap:28px 44px;margin-top:48px;text-align:left}
.meta-row>div{display:grid;gap:8px;min-width:0}
.meta-row .k{font-family:var(--serif);font-size:1rem}
.meta-row .v{display:flex;flex-wrap:wrap;gap:6px}

/* abstract band */
.abstract{background:var(--band);padding-block:clamp(48px,7vw,80px)}
.abstract h2{font-family:var(--serif);font-size:1.15rem;text-align:center;margin-bottom:22px;font-weight:500}
.abstract p{font-family:var(--serif);font-size:clamp(1.12rem,1.6vw,1.28rem);line-height:1.6;text-align:justify;hyphens:auto}
.paper{padding-block:clamp(48px,7vw,88px)}
.paper p{font-family:var(--serif);font-size:clamp(1.08rem,1.5vw,1.2rem);line-height:1.68;text-align:justify;hyphens:auto}
.paper .text{display:grid;gap:1.15em}
.paper p.closing{font-style:italic;text-align:left}

/* dark band — thesis */
.dark{background:var(--night);color:var(--night-ink)}
.thesis{position:relative;overflow:hidden}
.thesis canvas{position:absolute;inset:0;width:100%;height:100%;display:block}
.thesis .wrap{position:relative;padding-block:clamp(72px,11vw,150px) clamp(56px,8vw,96px);display:grid;gap:clamp(48px,7vw,96px)}
.statement{font-family:var(--sans);font-weight:300;font-size:clamp(2.1rem,5.4vw,4.6rem);line-height:1.04;letter-spacing:-.035em;max-width:16ch}
.statement em{font-style:normal;color:var(--night-muted)}
.index{border-top:1px solid var(--night-rule)}
.irow{display:grid;grid-template-columns:90px minmax(0,1.1fr) minmax(0,1fr) 160px;gap:12px 28px;align-items:baseline;padding:22px 0;border-bottom:1px solid var(--night-rule)}
.irow .no{font-family:var(--mono);font-size:.78rem;color:var(--night-muted)}
.irow h3{font-size:clamp(1.3rem,2.4vw,1.9rem);font-weight:400;letter-spacing:-.02em}
.irow p{color:var(--night-muted);font-size:.98rem}
.irow .gives{font-family:var(--mono);font-size:.76rem;color:var(--night-muted);text-align:right}
.irow.on h3,.irow.on .gives,.irow.on .no{color:var(--night-ink)}
.irow.on .gives::before{content:"";display:inline-block;width:7px;height:7px;background:var(--night-ink);margin-right:8px;animation:blink 1.6s steps(2,start) infinite}
@keyframes blink{to{visibility:hidden}}
@media (max-width:820px){.irow{grid-template-columns:56px minmax(0,1fr)}.irow p,.irow .gives{grid-column:2;text-align:left}}

/* section heads on paper */
.sec{padding-block:clamp(64px,9vw,120px)}
.sec-head{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:20px 48px;align-items:end;margin-bottom:clamp(32px,5vw,56px)}
.sec-head h2{font-size:clamp(2rem,4.4vw,3.4rem);font-weight:300;letter-spacing:-.035em;line-height:1.04}
.sec-head p{font-family:var(--serif);font-size:1.12rem;color:var(--muted);max-width:46ch}
@media (max-width:820px){.sec-head{grid-template-columns:minmax(0,1fr)}}

/* principles */
.plist{border-top:1px solid var(--ink)}
.prow{all:unset;box-sizing:border-box;cursor:pointer;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.15fr) 150px;gap:10px 40px;padding:28px 0;border-bottom:1px solid var(--rule);align-items:start;width:100%}
.prow h3{font-size:clamp(1.35rem,2.4vw,1.85rem);font-weight:400;letter-spacing:-.025em;line-height:1.15}
.prow p{font-family:var(--serif);font-size:1.08rem;line-height:1.55;color:var(--ink)}
.prow .tag{font-family:var(--mono);font-size:.72rem;color:var(--muted);text-align:right;padding-top:6px;display:grid;gap:6px;justify-items:end}
.prow .tag b{font-weight:400;color:var(--ink);transition:transform .2s}
.prow:hover .tag b{transform:translateX(4px)}
.prow:focus-visible{outline:2px solid var(--ink);outline-offset:4px}
@media (max-width:820px){.prow{grid-template-columns:minmax(0,1fr)}.prow .tag{text-align:left;justify-items:start;padding-top:0}}

/* writing carousel (dark) */
.writing .wrap{padding-block:clamp(64px,9vw,120px)}
.writing .sec-head p{color:var(--night-muted)}
.car-ctrl{display:flex;gap:8px;justify-content:flex-end}
.car-ctrl button{all:unset;cursor:pointer;width:42px;height:42px;display:grid;place-items:center;border:1px solid var(--night-rule);border-radius:50%;font-family:var(--mono);color:var(--night-ink)}
.car-ctrl button:hover{border-color:var(--night-ink)}
.car-ctrl button:focus-visible{outline:2px solid var(--night-ink)}
.track{display:grid;grid-auto-flow:column;grid-auto-columns:minmax(280px,30%);gap:20px;overflow-x:auto;scroll-snap-type:x mandatory;padding-bottom:12px;scrollbar-width:thin;scrollbar-color:var(--night-rule) transparent}
@media (max-width:900px){.track{grid-auto-columns:minmax(260px,78%)}}
.card{all:unset;box-sizing:border-box;cursor:pointer;scroll-snap-align:start;display:grid;gap:14px;align-content:start;min-width:0}
.card canvas{width:100%;aspect-ratio:4/3;max-width:100%;display:block;background:var(--night-2);border-radius:2px;transition:filter .25s}
.card:hover canvas{filter:brightness(1.25)}
.card .cap{font-family:var(--mono);font-size:.7rem;letter-spacing:.14em;text-transform:uppercase;color:var(--night-muted)}
.card h3{font-size:1.22rem;font-weight:400;letter-spacing:-.015em;line-height:1.25}
.card .m{font-family:var(--mono);font-size:.72rem;color:var(--night-muted);display:flex;gap:12px;flex-wrap:wrap}
.card:focus-visible{outline:2px solid var(--night-ink);outline-offset:6px}

/* collaborate */
.roles{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:0;border-top:1px solid var(--ink)}
.role{padding:28px 28px 32px 0;display:grid;gap:14px;align-content:start;border-right:1px solid var(--rule)}
.role+.role{padding-left:28px}
.role:last-child{border-right:0;padding-right:0}
.role .no{font-family:var(--mono);font-size:.72rem;color:var(--muted)}
.role h3{font-size:1.6rem;font-weight:400;letter-spacing:-.025em;line-height:1.1}
.role p{font-family:var(--serif);font-size:1.06rem;color:var(--ink)}
.role ul{list-style:none;margin:6px 0 0;padding:0;display:grid;gap:0;border-top:1px solid var(--rule)}
.role li{font-size:.9rem;padding:9px 0;border-bottom:1px solid var(--rule);color:var(--muted)}
@media (max-width:900px){.roles{grid-template-columns:minmax(0,1fr)}.role,.role+.role{padding:24px 0;border-right:0;border-bottom:1px solid var(--rule)}}

/* endorsements */
.endo{background:var(--band)}
.quotes{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:48px 64px}
.quotes figure{margin:0;display:grid;gap:14px;align-content:start}
.quotes blockquote{margin:0;font-family:var(--serif);font-size:1.18rem;line-height:1.55}
.quotes figcaption{font-size:.88rem}
.quotes figcaption b{font-weight:500}
.quotes figcaption span{display:block;color:var(--muted)}
.quotes .lead{grid-column:1/-1}
.quotes .lead blockquote{font-size:clamp(1.4rem,2.6vw,2rem);line-height:1.35;max-width:36ch}
.qnote{font-family:var(--mono);font-size:.72rem;color:var(--muted);margin-top:36px}
@media (max-width:760px){.quotes{grid-template-columns:minmax(0,1fr)}}

/* contact + footer (preprint style) */
.contact{text-align:center;padding-block:clamp(72px,10vw,128px)}
.contact h2{font-family:var(--serif);font-variant:small-caps;font-size:clamp(1.9rem,4.4vw,3.2rem);line-height:1.1}
.contact p{font-family:var(--serif);font-size:1.15rem;max-width:44ch;margin:18px auto 0;color:var(--muted)}
.contact .meta-row{justify-content:center}
.foot{text-align:center;padding-block:28px 40px;border-top:1px solid var(--rule)}
.foot .links{display:flex;justify-content:center;flex-wrap:wrap;gap:6px;align-items:center}
.foot .links span.sep{color:var(--rule)}
.foot small{display:block;margin-top:18px;font-family:var(--serif);font-size:.92rem;color:var(--muted)}
a.chip{text-decoration:none}


/* outlook */
.outlook{background:var(--band);padding-block:clamp(64px,9vw,120px)}
.outlook .sec-head h2{max-width:18ch}
.spectrum{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,.8fr) minmax(0,1fr);gap:0;border:1px solid var(--ink);background:var(--paper)}
.pole{padding:28px;display:grid;gap:14px;align-content:start}
.pole h3,.core h3{font-size:1.5rem;font-weight:400;letter-spacing:-.02em;line-height:1.15}
.pole ul{list-style:none;margin:0;padding:0;display:grid;border-top:1px solid var(--rule)}
.pole li{padding:12px 0;border-bottom:1px solid var(--rule);display:grid;gap:2px}
.pole li b{font-weight:500;font-size:.98rem}
.pole li span{font-family:var(--serif);font-size:1rem;color:var(--muted);line-height:1.4}
.pole .cycle{font-family:var(--mono);font-size:.74rem;color:var(--muted)}
.core{background:var(--night);color:var(--night-ink);padding:28px;display:grid;gap:14px;align-content:center;text-align:center;position:relative}
.core .eyebrow{color:var(--night-muted)}
.core h3{font-size:clamp(1.6rem,2.6vw,2.1rem)}
.core p{font-family:var(--serif);font-size:1.06rem;color:var(--night-ink);opacity:.85}
.core .arrows{display:flex;justify-content:space-between;font-family:var(--mono);color:var(--night-muted);font-size:1.1rem}
@media (max-width:900px){.spectrum{grid-template-columns:minmax(0,1fr)}.core{order:-1}.core .arrows{display:none}}
.theses{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:0;margin-top:clamp(40px,6vw,72px);border-top:1px solid var(--ink)}
.thesis-item{padding:26px 26px 30px 0;display:grid;gap:10px;align-content:start;border-bottom:1px solid var(--rule)}
.thesis-item:not(:nth-child(3n+1)){padding-left:26px;border-left:1px solid var(--rule)}
.thesis-item .no{font-family:var(--mono);font-size:.72rem;color:var(--muted)}
.thesis-item h3{font-size:1.28rem;font-weight:400;letter-spacing:-.02em;line-height:1.2}
.thesis-item p{font-family:var(--serif);font-size:1.04rem;line-height:1.55}
@media (max-width:900px){.theses{grid-template-columns:minmax(0,1fr)}.thesis-item,.thesis-item:not(:nth-child(3n+1)){padding:22px 0;border-left:0}}
.compare-wrap{margin-top:clamp(40px,6vw,72px);display:grid;gap:18px}
.compare-title{font-size:1.5rem;font-weight:400;letter-spacing:-.02em}
.tscroll{overflow-x:auto}
.compare{width:100%;border-collapse:collapse;min-width:560px;background:var(--paper)}
.compare th,.compare td{text-align:left;padding:12px 16px;border-bottom:1px solid var(--rule);vertical-align:top}
.compare thead th{font-family:var(--mono);font-size:.72rem;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);font-weight:400;border-bottom:1px solid var(--ink)}
.compare thead th:last-child{color:var(--ink)}
.compare tbody th{font-weight:500;font-size:.92rem;width:22%}
.compare td{font-family:var(--serif);font-size:1.04rem}
.compare td:last-child{background:var(--band);font-weight:500}


/* stack figures */
.demo{position:relative;background:var(--night);display:grid;grid-template-columns:minmax(0,.8fr) minmax(0,1.6fr);gap:clamp(28px,4vw,56px);align-items:start;border-top:1px solid var(--night-rule);padding-top:clamp(40px,5vw,64px)}
.demo-text{display:grid;gap:16px;align-content:start}
.demo-text h3{font-size:clamp(1.5rem,2.6vw,2rem);font-weight:300;letter-spacing:-.025em;line-height:1.12}
.demo-text p{font-family:var(--serif);font-size:1.08rem;line-height:1.6;color:var(--night-ink);opacity:.88}
.demo-links{display:flex;flex-wrap:wrap;gap:10px;margin-top:6px}
.dlink{all:unset;cursor:pointer;font-family:var(--mono);font-size:.76rem;padding:8px 12px;border:1px solid var(--night-rule);border-radius:4px;color:var(--night-ink)}
.dlink:hover{border-color:var(--night-ink)}
.dlink:focus-visible{outline:2px solid var(--night-ink);outline-offset:2px}
.demo-figs{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;min-width:0}
@media (max-width:1000px){.demo{grid-template-columns:minmax(0,1fr)}}
@media (max-width:700px){.demo-figs{grid-template-columns:minmax(0,1fr)}}
.fig{margin:0;background:#141619;color:#ECEDEE;border:1px solid #26292E;border-radius:3px;padding:18px 16px 16px;display:grid;gap:14px;min-width:0}
.fig .fh{display:grid;gap:2px;text-align:center}
.fig .fh b{font-weight:500;font-size:1.05rem;letter-spacing:-.01em}
.fig .fh span{font-family:var(--mono);font-size:.68rem;letter-spacing:.06em;color:#8A8F96;text-transform:uppercase}
.fig .fbody{display:grid;grid-template-columns:minmax(0,1fr) 44px;gap:10px}
.funnel{display:grid;gap:3px}
.lyr{margin-inline:auto;text-align:center;padding:7px 9%;clip-path:polygon(0 0,100% 0,96.5% 100%,3.5% 100%);display:grid;gap:1px;min-width:0}
.lyr b{font-weight:500;font-size:.8rem;line-height:1.2}
.lyr span{font-size:.66rem;line-height:1.25;opacity:.82}
.lyr.tech{background:#2B2E34;color:#ECEDEE}
.lyr.data{background:#6B6F77;color:#FFFFFF}
.lyr.hl{background:#ECEDEE;color:#0B0C0E}
.lyr.hl b{font-weight:600;font-size:.9rem}
.scale{display:flex;flex-direction:column;gap:12px;padding-top:10px;font-family:var(--mono);font-size:.58rem;letter-spacing:.06em;text-transform:uppercase}
.seg{position:relative;display:flex;gap:6px;align-items:center;min-height:48px}
.seg::before{content:"";align-self:stretch;width:2px;background:currentColor;flex:none}
.seg::after{content:"";position:absolute;left:-4px;top:-9px;border-left:5px solid transparent;border-right:5px solid transparent;border-bottom:9px solid currentColor}
.seg i{font-style:normal;writing-mode:vertical-rl;transform:rotate(180deg);white-space:nowrap}
.seg.d{color:#C9CAC6}
.seg.t{color:#6B6F77}
.fig .legend{font-family:var(--mono);font-size:.66rem;color:#B9BBB8;text-align:right}
.fig figcaption{font-family:var(--mono);font-size:.7rem;color:#8A8F96;line-height:1.45}
.prose .fig{margin:1.6em 0;font-family:var(--sans)}

/* reader */
.reader{position:fixed;inset:0;z-index:60;background:color-mix(in srgb,var(--night) 70%,transparent);display:flex;justify-content:center;align-items:stretch}
.sheet{background:var(--paper);width:min(880px,100%);height:100%;overflow-y:auto;overscroll-behavior:contain;padding-top:env(safe-area-inset-top,0px);padding-bottom:env(safe-area-inset-bottom,0px);animation:rise .3s ease-out}
@keyframes rise{from{transform:translateY(16px);opacity:.5}to{transform:none;opacity:1}}
.sheet-bar{position:sticky;top:0;background:var(--paper);border-bottom:1px solid var(--rule);display:flex;align-items:center;gap:10px;padding:12px max(16px,env(safe-area-inset-right,0px)) 12px max(16px,env(safe-area-inset-left,0px))}
.sheet-bar .eyebrow{margin-right:auto}
.doc{padding:48px max(16px,env(safe-area-inset-right,0px)) 88px max(16px,env(safe-area-inset-left,0px));max-width:720px;margin-inline:auto}
.doc .when{font-family:var(--mono);font-size:.76rem;color:var(--muted);text-align:center}
.doc h1{font-family:var(--serif);font-variant:small-caps;font-size:clamp(1.8rem,4vw,2.7rem);line-height:1.1;text-align:center;margin:14px 0 8px}
.doc .by{font-family:var(--serif);text-align:center;color:var(--muted);margin-bottom:32px}
.doc .note{font-family:var(--mono);font-size:.74rem;background:var(--band);padding:10px 14px;border-radius:4px;margin-bottom:28px}
.prose{font-family:var(--serif);font-size:1.16rem;line-height:1.68}
.prose p{margin:0 0 1em;text-align:justify;hyphens:auto}
.prose h2{font-family:var(--serif);font-size:1.22rem;font-weight:600;margin:1.9em 0 .6em}
.prose ul,.prose ol{margin:0 0 1.1em;padding-left:1.4em}
.prose li{margin-bottom:.35em}
.prose blockquote{margin:1.4em 0;padding:16px 20px;background:var(--band);font-style:italic}

.stack{display:grid;gap:18px}
.stack-lg{gap:22px}
.selectable{user-select:all;-webkit-user-select:all}
.noscript{margin:0;padding:12px 16px;background:var(--ink);color:var(--paper);font-family:var(--mono);font-size:.8rem;text-align:center}
.err-title{font-family:var(--serif);font-variant:small-caps;font-size:clamp(1.9rem,4.4vw,3.2rem);line-height:1.1;font-weight:400}