/* Chinese Room — Field production theme.
   Overrides the styles.css layout base: dark field shell, light article
   surface, static procedural artwork. No concepts/folio imports. */

:root{
  color-scheme:dark;
  --bg:#08090a;--panel:#151617;--panel2:#1d1e20;
  --line:#303133;--line2:#48494b;
  --text:#f5f5f5;--body:#dedede;--muted:#b5b5b5;--quiet:#a3a3a3;--dim:#969696;
  --lime:#f5f5f5;--lime2:#d7d7d7;
  --sans:'DM Sans',Arial,sans-serif;
  --mono:'IBM Plex Mono',ui-monospace,monospace;
}
body{font-family:var(--sans);line-height:1.5}
[hidden]{display:none!important}
::selection{background:#f5f5f5;color:#08090a}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
:focus-visible{outline:3px solid currentColor;outline-offset:3px}
a:hover{color:var(--text)}

/* ---------- Top bar ---------- */
.topbar{position:sticky;top:0;z-index:50;background:#08090af5;border-bottom:1px solid var(--line);backdrop-filter:none}
.topbar-inner{max-width:1440px;height:76px;margin:auto;padding:0 32px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{display:flex;align-items:center;gap:12px;color:var(--text);text-decoration:none;font:600 20px var(--sans);letter-spacing:-.02em}
.brand:hover{color:var(--text)}
.field-mark{display:grid;grid-template-columns:repeat(3,5px);grid-auto-rows:5px;gap:2px}
.field-mark i{display:block;background:#fff}
.field-mark i:nth-child(5),.field-mark i:nth-child(9){background:transparent}
.topbar nav{display:flex;align-items:center;gap:4px;height:100%}
.nav-link{position:relative;display:flex;align-items:center;height:100%;padding:0 13px;border-bottom:0;color:var(--muted);font:400 14px var(--sans);text-transform:none;letter-spacing:0;text-decoration:none}
.nav-link:hover{color:var(--text)}
.nav-link.active{color:var(--text)}
.nav-link.active::after{content:"";position:absolute;left:13px;right:13px;bottom:17px;height:2px;background:#fff}
.top-actions{display:flex;align-items:center;gap:10px}
.search-open{display:flex;align-items:center;gap:14px;height:40px;padding:0 14px;border:1px solid var(--line2);border-radius:4px;background:transparent;color:var(--quiet);font:400 13px var(--sans);cursor:pointer}
.search-open:hover{border-color:var(--muted);color:var(--text)}
.search-open kbd{padding:2px 6px;border:1px solid var(--line2);border-radius:5px;color:var(--quiet);font:400 10px var(--mono)}
.console-link.cta{height:auto;padding:9px 0;border:0;border-bottom:1px solid var(--line2);border-bottom-color:color-mix(in srgb,currentColor 30%,transparent);border-radius:0;background:none;color:var(--text);font:500 14px/1.25 var(--sans)}
.console-link.cta:hover{background:none;color:#fff;border-bottom-color:currentColor}
.menu-toggle{display:none;width:44px;height:44px;border:1px solid var(--line2);border-radius:50%;background:transparent;color:var(--text);cursor:pointer;place-items:center;position:relative}
.menu-toggle span{position:absolute;left:14px;width:16px;height:1.5px;background:currentColor;transition:transform .2s,top .2s}
.menu-toggle span:first-child{top:18px}
.menu-toggle span:last-child{top:24px}
.menu-toggle[aria-expanded="true"] span:first-child{top:21px;transform:rotate(45deg)}
.menu-toggle[aria-expanded="true"] span:last-child{top:21px;transform:rotate(-45deg)}
.nav-sweep{position:absolute;bottom:-1px;left:0;height:2px;width:0;background:#fff;transition:width .25s}
.mobile-menu{position:absolute;top:100%;left:0;right:0;display:grid;gap:0;padding:8px 24px 20px;background:#0c0d0e;border-bottom:1px solid var(--line)}
.mobile-menu a{display:flex;align-items:center;min-height:44px;padding:10px 0;border-bottom:1px solid var(--line);color:var(--text);font:400 20px var(--sans);text-decoration:none}
.mobile-menu a:last-child{border-bottom:0}
.mobile-menu a.active{color:#fff;font-weight:600}
.topbar #mobile-menu:not([hidden]){display:grid;position:absolute;inset:100% 0 auto;height:auto;max-height:calc(100dvh - 76px);overflow-y:auto;align-items:stretch;gap:0}
.topbar #mobile-menu .nav-link{height:auto;min-height:48px;font-size:20px}
.mobile-menu .nav-link.active::after{display:none}
main{min-height:75vh}
#main:focus{outline:none}
.noscript-note{max-width:720px;margin:auto;padding:80px 24px;color:var(--body);font-size:16px;line-height:1.7}

/* ---------- Footer ---------- */
.site-footer{border-top:1px solid var(--line);background:#0b0c0d}
.footer-inner{max-width:1440px;margin:auto;padding:48px 32px 24px;display:flex;flex-wrap:wrap;align-items:flex-start;gap:20px 48px}
.footer-inner .brand{font-size:20px}
.footer-about{margin:0;color:var(--muted);font:400 14px/1.6 var(--sans)}
.footer-links{display:flex;flex-wrap:wrap;gap:10px 26px;margin-left:auto}
.footer-links a{color:var(--muted);font:400 12px var(--sans);letter-spacing:.05em;text-decoration:none;text-transform:uppercase}
.footer-links a:hover{color:var(--text)}
.copyright{width:100%;margin-top:28px;padding-top:20px;border-top:1px solid var(--line);color:var(--dim);font:400 11px var(--sans)}

/* ---------- Shared Field primitives ---------- */
.eyebrow{margin:0 0 14px;color:var(--quiet);font:500 11px/1.5 var(--sans);letter-spacing:.12em;text-transform:uppercase}
:root{
  --arrow-right:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 10'%3E%3Cpath d='M0 5h22.6M18.2 1l4.4 4-4.4 4' fill='none' stroke='%23000' stroke-width='1.3'/%3E%3C/svg%3E");
  --arrow-out:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12'%3E%3Cpath d='M1.2 10.8 10.6 1.4M4 1.4h6.6V8' fill='none' stroke='%23000' stroke-width='1.3'/%3E%3C/svg%3E");
  --arrow-down:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 10 14'%3E%3Cpath d='M5 0v12.6M1 8.6l4 4 4-4' fill='none' stroke='%23000' stroke-width='1.3'/%3E%3C/svg%3E");
}
/* Links that take you somewhere: a label, a drawn hairline arrow and a rule beneath.
   .cta-out for external files and sites, .cta-down for downloads and in-page jumps. */
.cta{display:inline-flex;align-items:center;gap:12px;width:max-content;max-width:100%;padding:0 0 9px;border-bottom:1px solid var(--line2);border-bottom-color:color-mix(in srgb,currentColor 30%,transparent);color:inherit;font:500 14px/1.25 var(--sans);text-decoration:none;transition:border-color .25s ease,color .25s ease}
.cta::after{content:"";flex:none;width:22px;height:10px;background:currentColor;-webkit-mask:var(--arrow-right) center/contain no-repeat;mask:var(--arrow-right) center/contain no-repeat;transition:transform .35s cubic-bezier(.2,.7,.2,1)}
.cta.cta-out::after{width:11px;height:11px;-webkit-mask-image:var(--arrow-out);mask-image:var(--arrow-out)}
.cta.cta-down::after{width:10px;height:13px;-webkit-mask-image:var(--arrow-down);mask-image:var(--arrow-down)}
.cta:hover,.cta:focus-visible,a:hover .cta,a:focus-visible .cta{border-bottom-color:currentColor}
.cta:hover::after,.cta:focus-visible::after,a:hover .cta::after,a:focus-visible .cta::after{transform:translateX(4px)}
.cta.cta-out:hover::after,.cta.cta-out:focus-visible::after{transform:translate(2px,-2px)}
.cta.cta-down:hover::after,.cta.cta-down:focus-visible::after{transform:translateY(2px)}
.cta:focus-visible{outline:2px solid currentColor;outline-offset:6px}
.cta-lg{gap:16px;padding-bottom:12px;font-size:16px}
.cta-lg::after{width:30px;height:12px}
.cta-sm{gap:10px;padding-bottom:7px;font-size:13px}
.cta-sm::after{width:18px;height:8px}
.cta-quiet{color:var(--muted)}
.cta-quiet:hover{color:var(--text)}
@media(prefers-reduced-motion:reduce){.cta,.cta::after{transition:none}}
.text-link{color:var(--muted);font:500 12px var(--sans);letter-spacing:.04em;text-decoration:none}
.text-link:hover{color:var(--text)}
.section-dark{background:#101112;padding:80px 7vw}
.section-dark h2,.home-flow h2{margin:0;font:500 clamp(36px,4.5vw,52px)/1.06 var(--sans);letter-spacing:-.035em;color:var(--text)}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:16px 32px;max-width:1440px;margin:0 auto 44px}
.section-head-side{display:flex;align-items:center;gap:22px}
.field-interiors-body{max-width:1440px;margin:0 auto}
/* Home: one surface and one spine. The residual stream drawn in the hero continues down the
   page as a hairline, and each section is a numbered stop on it. */
.home-flow{--spine:calc(max(7vw,(100% - 1440px) / 2) - 36px);position:relative;padding-bottom:120px;background:#08090a}
.home-flow>section{padding:104px 7vw 0;background:transparent}
.home-flow>section:first-child{padding-top:40px}
.home-flow .eyebrow{position:relative}
.flow-no{margin-right:14px;color:var(--dim);font:400 11px var(--mono);letter-spacing:.04em}
@media(min-width:1000px){
  .home-flow::before{content:"";position:absolute;top:0;bottom:120px;left:var(--spine);width:1px;background:linear-gradient(var(--line2),var(--line2) 90%,rgba(47,52,60,0))}
  .home-flow .eyebrow::before{content:"";position:absolute;top:50%;left:-40.5px;width:9px;height:9px;margin-top:-5px;border:1px solid var(--quiet);border-radius:50%;background:#08090a}
}
@media(max-width:760px){
  .home-flow{padding-bottom:72px}
  .home-flow>section{padding:72px 24px 0}
  .home-flow>section:first-child{padding-top:24px}
}
.field-interiors .section-head{margin-bottom:28px}
.field-interiors .ir-intro{margin:48px 0 0}
.field-interiors .ir-intro p{font-size:17px}
.field-interiors .ir-note{margin:30px 0 18px}

.rail-controls{display:flex;gap:8px}
.rail-controls button{width:40px;height:40px;border:1px solid var(--line2);border-radius:50%;background:transparent;color:var(--text);font:400 15px var(--sans);cursor:pointer}
.rail-controls button:hover:not(:disabled){border-color:var(--muted);background:#1b1c1e}
.rail-controls button:disabled{opacity:.32;cursor:default}
.rail-note{margin:26px auto 0;max-width:1440px;color:var(--dim);font:400 11px var(--sans);letter-spacing:.08em;text-transform:uppercase}
.card-rail{display:flex;gap:20px;overflow-x:auto;scroll-snap-type:x proximity;padding-bottom:8px;scrollbar-width:thin}
.card-rail:focus-visible{outline-offset:6px}

/* Field cards — stable stacked layout, alternating dark/light */
.field-card{display:flex;flex-direction:column;flex:0 0 min(360px,82vw);height:auto;min-height:480px;padding:28px;border-radius:12px;overflow:hidden;text-decoration:none;min-width:0;scroll-snap-align:start}
.field-card.card-dark{background:#1b1c1e;color:#fff}
.field-card.card-light{background:#f4f4f4;color:#111;color-scheme:light}
.field-card.card-dark:hover{color:#fff}
.field-card.card-light:hover{color:#111}
.field-card:focus-visible{outline:3px solid currentColor;outline-offset:-4px}
.field-card-topic{font:400 11px/1.5 var(--sans);letter-spacing:.07em;text-transform:uppercase;color:inherit;opacity:.72}
.field-card h3{font:500 25px/1.16 var(--sans);letter-spacing:-.025em;margin:14px 0 0;color:inherit}
.field-card-art{display:block;flex:1;min-height:160px;margin:0 -28px;overflow:hidden}
.field-card-art img{width:100%;height:100%;object-fit:contain}
.field-card-bottom{display:flex;justify-content:space-between;align-items:center;gap:10px}
.field-card-bottom small{font:400 11px var(--sans);color:inherit;opacity:.6}
.field-card-dek{margin:10px 0 0;color:inherit;opacity:.78;font:400 13px/1.5 var(--sans);flex-shrink:0}
.article-note{margin:14px 0 0;padding:10px 14px;border:1px solid var(--line);border-radius:10px;color:var(--muted);font:400 12px/1.6 var(--sans)}
.article-links{margin:12px 0 0;font-size:13px}
.model-note{margin:10px 0 0;color:var(--muted);font:400 12px/1.6 var(--sans)}
.model-links{display:flex;gap:16px;margin-top:12px;flex-wrap:wrap}
.article-links .text-link,.model-links .text-link{white-space:normal;overflow-wrap:anywhere}

/* ---------- Home ---------- */
.field-hero{position:relative;min-height:560px;height:calc(88svh - 76px);max-height:820px;overflow:hidden;background:#08090a}
.field-hero::after{content:"";position:absolute;left:0;right:0;bottom:0;height:220px;background:linear-gradient(rgba(8,9,10,0),#08090a);pointer-events:none}
.field-hero-art{position:absolute;top:-5%;right:-8%;width:85%;height:110%}
.field-hero-art img{width:100%;height:100%;object-fit:cover;object-position:center}
.field-hero-shade{position:absolute;inset:0;background:linear-gradient(90deg,#08090a 0%,#08090acc 34%,#08090a22 62%,transparent 80%)}
.field-hero-copy{position:relative;z-index:1;display:flex;flex-direction:column;justify-content:center;height:100%;padding:0 7vw;max-width:760px}
.field-hero-copy h1{margin:0;color:#fff;font:500 clamp(56px,6.8vw,100px)/1.02 var(--sans);letter-spacing:-.045em;max-width:640px}
.field-hero-copy>p:not(.eyebrow){margin:28px 0 0;color:#c9c9c9;font:400 18px/1.6 var(--sans);max-width:440px}
.field-hero-copy .cta{margin-top:40px;align-self:flex-start;color:#fff}
.field-research .field-rail{max-width:1440px;margin:0 auto}
.field-experiments{max-width:none}
.field-experiments .field-exp-intro{max-width:1440px;margin:0 auto}
.field-exp-intro p:not(.eyebrow){margin:20px 0 0;color:var(--muted);font:400 17px/1.6 var(--sans)}
.field-exp-links{max-width:1440px;margin:44px auto 0}
.experiment-link{display:flex;align-items:baseline;gap:26px;padding:34px 0;border-top:1px solid var(--line);color:var(--text);text-decoration:none}
.experiment-link:last-child{border-bottom:1px solid var(--line)}
.experiment-link:hover{color:#fff}
.experiment-link .exp-no{color:var(--dim);font:400 12px var(--mono)}
.experiment-link .exp-name{font:500 clamp(30px,4vw,46px)/1.05 var(--sans);letter-spacing:-.03em}
.experiment-link .exp-arrow{flex:none;align-self:center;margin-left:auto;width:34px;height:14px;font-size:0;background:currentColor;-webkit-mask:var(--arrow-right) center/contain no-repeat;mask:var(--arrow-right) center/contain no-repeat;opacity:.65;transition:transform .35s cubic-bezier(.2,.7,.2,1),opacity .25s}
.experiment-link:hover .exp-arrow,.experiment-link:focus-visible .exp-arrow{transform:translateX(6px);opacity:1}

/* ---------- Generic pages ---------- */
.page{max-width:1440px;margin:0 auto;padding:72px 7vw 100px}
.page-title{margin:0 0 22px;font:500 clamp(44px,6.5vw,88px)/1.04 var(--sans);letter-spacing:-.045em}
.page-intro{max-width:640px;margin:0;color:var(--muted);font:400 20px/1.6 var(--sans)}
.filters{display:flex;flex-wrap:wrap;gap:8px;margin:44px 0 40px}
.filter{padding:10px 16px;border:1px solid var(--line2);border-radius:4px;background:transparent;color:var(--muted);font:400 12px var(--sans);letter-spacing:.04em;cursor:pointer}
.filter:hover{border-color:var(--muted);color:var(--text)}
.filter.active{background:#fff;border-color:#fff;color:#111}
.field-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;max-width:1440px}
.field-grid .field-card{flex:0 0 auto;width:100%;height:auto;min-height:480px}
.research-count{margin:28px 0 0;color:var(--dim);font:400 12px var(--sans)}
.research-page .eyebrow{margin-bottom:18px}

/* ---------- Lab ---------- */
.lab-cards{gap:24px}
.lab-card{border-radius:24px;background:var(--panel);border:1px solid var(--line);padding:28px;transition:border-color .2s}
.lab-card:hover{border-color:#777;transform:none;color:var(--text)}
.lab-card h2{font:500 clamp(28px,3vw,38px)/1.08 var(--sans);letter-spacing:-.03em}
.lab-card-art{height:200px;align-items:stretch}
.lab-card-art.cube-glyph,.lab-card-art.quant-glyph{display:block;width:100%;height:100%;font-size:0;transform:none}
.lab-card-art img{width:100%;height:100%;object-fit:contain}
.lab-banner{background:#171819;border-color:var(--line2);border-radius:16px}
.lab-workbench{border-radius:24px;overflow:hidden}
.cube-stage{background:#151617}
.lab-controls{background:var(--panel2)}
.lab-error{color:#f5b5b5}
.quant-glyph{color:#fff}

/* ---------- Models ---------- */
.model-page .model-registry{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;margin-top:44px;border:0;background:none}
.model-item{border-radius:24px;background:var(--panel);padding:32px}
.model-item h3{font:500 24px var(--sans);letter-spacing:-.02em;overflow-wrap:anywhere}
.model-item p{color:var(--muted);font:400 14px/1.6 var(--sans)}
.model-state{font:400 11px var(--sans);letter-spacing:.06em}
.model-state .lime{color:#f5f5f5}.model-state .purple{color:#c9c9c9}.model-state .amber{color:#9a9a9a}.model-state .quiet{color:#7d7d7d}
.model-specs{border-top:1px solid var(--line);gap:12px}
.model-specs span{font:400 13px var(--sans);color:var(--body)}
.model-specs small{font:400 11px var(--sans);color:var(--dim);letter-spacing:.04em}

/* ---------- About ---------- */
.about-grid{align-items:start}
.about-visual{min-height:0;height:500px;padding:0;border:0;border-radius:24px;background:#141516;overflow:hidden;display:block}
.about-visual img{width:100%;height:100%;object-fit:cover;display:block}
.about-copy h2{font:500 clamp(34px,4.4vw,48px)/1.08 var(--sans);letter-spacing:-.03em}
.setup-grid{border:0;background:none;gap:16px}
.setup{border-radius:16px;background:var(--panel)}
.setup small{font:400 11px var(--sans);letter-spacing:.06em;text-transform:uppercase}
.setup b{font:500 14px/1.5 var(--sans)}

/* ---------- Article: light reading surface ---------- */
body[data-page="article"] #main{
  color-scheme:light;
  --bg:#f8f8f8;--panel:#ffffff;--panel2:#eeeeee;
  --line:#d8d8d8;--line2:#bbbbbb;
  --text:#151515;--body:#262626;--muted:#555555;--quiet:#666666;--dim:#666666;
  --lime:#151515;--lime2:#333333;
  background:var(--bg);color:var(--text);
}
.article-page .text-link{color:var(--muted)}
.article-head{border-bottom-color:var(--line)}
.article-head h1{color:var(--text)}
.article-page .page-intro{color:var(--muted)}
.article-layout{grid-template-columns:minmax(0,1fr) 240px}
.prose{min-width:0}
.prose p{font-size:18px;line-height:1.85;max-width:70ch}
.prose figure div{max-width:100%;overflow:hidden}
.prose h2 small{color:var(--muted);font-family:var(--mono)}
.prose figure div{background:#fff;border-color:var(--line);border-radius:12px}
.prose figcaption{font-family:var(--sans);font-size:12px}
.prose pre{background:var(--panel2);border-color:var(--line);border-left-color:var(--line2);border-radius:12px;font-size:13px}
.prose blockquote{border-left-color:#151515;color:var(--body)}
.article-table-wrap{border-radius:12px}
.article-table thead th{color:var(--text)}
.next-article{border-radius:16px}
.next-article:hover{border-color:var(--line2)}
.toc a:hover,.toc a.active{color:#151515}
.article-actions{gap:12px 32px;align-items:flex-end;margin-top:30px}
.article-lab-link{margin:6px 0 0}

/* ---------- Search dialog ---------- */
.search-dialog{border-radius:20px;background:#131415;border-color:var(--line2);color:var(--text)}
.search-dialog::backdrop{background:#000000cc}
.search-input-row:focus-within{outline:2px solid #f5f5f5;outline-offset:-2px;border-radius:20px 20px 0 0}
.search-input-row input{min-width:0}
.search-input-row>span{color:var(--muted)}
.search-result{border-radius:10px}
.search-result:hover{background:#222427}
.search-result small{color:var(--muted)}
.esc{border:1px solid var(--line2);border-radius:6px;background:transparent;color:var(--quiet);font:400 10px var(--mono);padding:5px 8px;cursor:pointer}
.esc:hover{color:var(--text);border-color:var(--muted)}
.empty-state{font-family:var(--sans);font-size:14px}

/* ---------- Buttons ---------- */
.button{border-radius:4px;min-height:44px;padding:0 18px;font-family:var(--sans)}
.lab-button-row:has(.cta){gap:12px 32px}
.button.primary{background:#fff;border-color:#fff;color:#111}
.button.primary:hover{background:#e2e2e2;border-color:#e2e2e2;color:#111}
body[data-page="article"] .button.primary{background:#111;border-color:#111;color:#fff}
body[data-page="article"] .button.primary:hover{background:#333;border-color:#333;color:#fff}

/* ---------- Responsive ---------- */
@media(max-width:1050px){
  .topbar nav{display:none}
  .console-link{display:none}
  .menu-toggle{display:grid}
}
@media(max-width:760px){
  .topbar-inner{height:64px;padding:0 20px}
  .topbar #mobile-menu:not([hidden]){max-height:calc(100dvh - 64px)}
  .brand{font-size:18px}
  .field-hero{min-height:520px;height:auto}
  .field-hero-art{right:-65%;width:160%;opacity:.55}
  .field-hero-shade{background:linear-gradient(90deg,#08090a 0%,#08090add 60%,#08090a99 100%)}
  .field-hero-copy{min-height:520px;padding:60px 24px 64px}
  .field-hero-copy h1{font-size:clamp(44px,12vw,64px)}
    .section-dark{padding:64px 24px}
  .page{padding:56px 24px 80px}
  .field-grid{grid-template-columns:1fr}
  .field-grid .field-card{height:auto;min-height:440px}
  .model-page .model-registry{grid-template-columns:1fr}
  .article-layout{grid-template-columns:minmax(0,1fr)}
  .toc{position:static;order:-1}
  .about-visual{height:340px}
  .footer-inner{flex-direction:column;gap:24px}
  .footer-links{margin-left:0}
}
@media(max-width:360px){
  .topbar-inner{padding:0 14px;gap:10px}
  .brand{font-size:17px}
  .top-actions{gap:6px}
  .search-open{padding:0 12px;height:40px}
  .menu-toggle{width:40px;height:40px}
  .menu-toggle span{left:12px;width:15px}
}
@media(prefers-reduced-motion:reduce){
  .menu-toggle span{transition:none}
}

/* ---------- The Maths of AI ---------- */
.maths-hero{position:relative;min-height:560px;overflow:hidden;background:#08090a}
.maths-hero-art{position:absolute;top:-8%;right:-10%;width:78%;height:116%}
.maths-hero-art img{width:100%;height:100%;object-fit:cover}
.maths-hero-shade{position:absolute;inset:0;background:linear-gradient(90deg,#08090a 0%,#08090acc 38%,#08090a22 66%,transparent 85%)}
.maths-hero-copy{position:relative;z-index:1;max-width:1440px;margin:0 auto;padding:120px 7vw 100px}
.maths-hero-copy h1{margin:0;font:500 clamp(48px,6.8vw,96px)/1.02 var(--sans);letter-spacing:-.045em;max-width:760px}
.maths-hero-copy>p:not(.eyebrow){margin:26px 0 0;max-width:470px;color:#c9c9c9;font:400 18px/1.6 var(--sans)}
.maths-topic{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);grid-template-areas:"copy figure";gap:0 64px;max-width:1440px;margin:0 auto;padding:96px 7vw;border-top:1px solid var(--line)}
.maths-topic:nth-child(even){grid-template-columns:minmax(0,7fr) minmax(0,5fr);grid-template-areas:"figure copy"}
.maths-copy{grid-area:copy}
.maths-copy h2{margin:0 0 10px;font:500 clamp(34px,4vw,48px)/1.06 var(--sans);letter-spacing:-.035em}
.maths-copy>p.maths-dek{margin:0 0 18px;color:var(--text);font:400 19px/1.45 var(--sans)}
.maths-copy>p:not(.eyebrow):not(.maths-formula):not(.maths-dek){margin:0 0 16px;color:var(--muted);font:400 16px/1.7 var(--sans)}
.maths-copy .text-link{color:var(--text);font-size:13px;white-space:nowrap}
.maths-formula{margin:0 0 22px;padding:14px 18px;border:1px solid var(--line);border-left:2px solid var(--ir-accent,#f5f5f5);border-radius:12px;background:#0d0e0f;color:var(--text);font:400 13px/1.6 var(--mono);overflow-x:auto;white-space:nowrap}
.maths-outro{border-top:1px solid var(--line)}

/* Maths: each topic's artwork, a live poster that opens the Interiors piece */
.maths-figure{grid-area:figure;align-self:start;position:sticky;top:96px;margin:0;min-width:0}
.maths-art{position:relative;display:block;aspect-ratio:10/8;border:1px solid #23262b;border-radius:24px;overflow:hidden;background:#05060a;color:#f2f4f6;text-decoration:none;isolation:isolate}
.maths-art .ir-poster{position:absolute;inset:0;width:100%;height:100%;display:block;transition:transform .9s cubic-bezier(.2,.7,.2,1)}
.maths-art:hover,.maths-art:focus-visible{border-color:var(--ir-accent)}
.maths-art:hover .ir-poster{transform:scale(1.03)}
.maths-art:focus-visible{outline:2px solid var(--ir-accent);outline-offset:4px}
.maths-art-text{position:absolute;left:0;right:0;bottom:0;display:flex;flex-direction:column;gap:6px;padding:72px 26px 24px;background:linear-gradient(transparent,rgba(3,4,7,.92) 60%)}
.maths-art-no{color:var(--ir-accent);font:400 10px/1.4 var(--mono);letter-spacing:.14em;text-transform:uppercase}
.maths-art-title{font:400 clamp(28px,3vw,40px)/1 var(--sans);letter-spacing:-.035em}
.maths-art-cap{max-width:46ch;color:#b9c0c7;font:400 14px/1.5 var(--sans)}
.maths-art-go{align-self:flex-start;margin-top:12px;color:#fff}
.maths-art:hover .maths-art-go{color:var(--ir-accent)}
@media(max-width:900px){
  .maths-topic,.maths-topic:nth-child(even){grid-template-columns:minmax(0,1fr);grid-template-areas:"copy" "figure";padding:64px 24px}
  .maths-figure{position:static;margin-top:28px}
  .maths-hero{min-height:480px}
  .maths-hero-art{right:-60%;width:150%;opacity:.5}
  .maths-hero-copy{padding:80px 24px 72px}
  }
@media(max-width:480px){
  .maths-art{aspect-ratio:4/5;border-radius:18px}
  .maths-art-text{padding:60px 18px 18px}
}
@media(prefers-reduced-motion:reduce){.maths-art .ir-poster{transition:none}}


.maths-hero-copy>p.maths-hero-note:not(.eyebrow){margin:18px 0 0;color:var(--dim);font:400 11px/1.6 var(--mono);letter-spacing:.08em}
.maths-sources{margin:10px 0 0;font-size:13px}
.maths-sources .text-link{white-space:normal}