/* Mattara Energy + Motion — public site
   Palette from the Treatise's "place" element: photovoltaic indigo, vein copper,
   membrane, graphite. Lines are insect venation, not geometry. */

@font-face{font-family:Fraunces;src:url(../fonts/fraunces.woff2) format("woff2");font-weight:100 900;font-display:swap}
@font-face{font-family:Fraunces;src:url(../fonts/fraunces-i.woff2) format("woff2");font-weight:100 900;font-style:italic;font-display:swap}
@font-face{font-family:"Public Sans";src:url(../fonts/ps-300.woff2) format("woff2");font-weight:300;font-display:swap}
@font-face{font-family:"Public Sans";src:url(../fonts/ps-400.woff2) format("woff2");font-weight:400;font-display:swap}
@font-face{font-family:"Public Sans";src:url(../fonts/ps-600.woff2) format("woff2");font-weight:600;font-display:swap}
@font-face{font-family:"IBM Plex Mono";src:url(../fonts/plex.woff2) format("woff2");font-weight:400 500;font-display:swap}

:root{
  /* Mattara design system, drawn from The Mattara Treatise.
     Light: plates on graph paper. Dark: the Treatise's night ground. Ochre is the trace line. */
  --paper:#eef0eb; --paper-2:#e3e7e0; --plate:#ffffff;
  --ink:#231f20; --ink-2:#4a4d4f; --muted:#6c716d;
  --rule:#c3c9c0; --grid:#cfd6cc; --grid-strong:#b5beb2; --grid-faint:#dfe4dc;
  --ochre:#a3402a; --slate:#34404d;
  --night:#15191b; --night-2:#1d2326; --night-ink:#e9e7e2; --night-ink-2:#c3c6c2;
  --night-muted:#949a96; --night-rule:#303836; --night-grid:#222a29;
  --ochre-lt:#e3825f; --slate-lt:#9fb0c2;
  --s-blue:#2a78d6; --s-green:#1baf7a; --s-violet:#4a3aa7;
  --display:Fraunces,Georgia,"Times New Roman",serif;
  --body:"Public Sans","Helvetica Neue",Arial,sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,Menlo,Consolas,monospace;
  /* component aliases */
  --indigo:var(--night); --indigo-2:var(--night-2); --indigo-line:var(--night-rule);
  --vein:var(--slate-lt); --membrane:var(--paper); --membrane-2:var(--paper-2);
  --graphite:var(--ink); --copper:var(--ochre); --amber:var(--ochre-lt);
  --mute-d:var(--night-muted); --mute-l:var(--muted); --rule-l:var(--rule);
  --gutter:clamp(16px,4.2vw,64px);
  --maxw:1520px;
  --ease:cubic-bezier(.2,.7,.2,1);
}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--indigo);color:var(--night-ink);font:400 17px/1.62 "Public Sans",system-ui,sans-serif;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;overflow-x:hidden}
img{max-width:100%;display:block}
a{color:inherit}
p{margin:0 0 1em}
h1,h2,h3,h4{font-family:Fraunces,Georgia,serif;font-weight:300;margin:0;letter-spacing:-.015em;font-variation-settings:"opsz" 144;font-weight:340}
:focus-visible{outline:2px solid var(--amber);outline-offset:3px;border-radius:2px}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.skip{position:absolute;left:var(--gutter);top:-60px;z-index:100;background:var(--amber);color:var(--graphite);padding:10px 16px;text-decoration:none;font-weight:600}
.skip:focus{top:12px}

/* ---------- layout ---------- */
.socket{max-width:var(--maxw);margin:0 auto;padding:0 var(--gutter)}
.grid{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));column-gap:clamp(12px,2vw,32px)}
.dark{background:var(--indigo);color:var(--night-ink)}
.light{background:var(--membrane);color:var(--graphite)}
.section{position:relative;padding:clamp(88px,12vw,180px) 0}
.screen{min-height:100vh;min-height:100svh}

/* ---------- type ---------- */
.t-hero{font-size:clamp(46px,7.4vw,124px);line-height:.98;letter-spacing:-.03em}
.t-1{font-size:clamp(40px,5.6vw,92px);line-height:1.02;letter-spacing:-.025em}
.t-2{font-size:clamp(32px,3.8vw,60px);line-height:1.08;letter-spacing:-.02em}
.t-3{font-size:clamp(23px,2vw,30px);line-height:1.2;letter-spacing:-.01em}
.t-lead{font-family:Fraunces,Georgia,serif;font-weight:300;font-size:clamp(26px,2.9vw,46px);line-height:1.2;letter-spacing:-.015em;font-variation-settings:"opsz" 96}
.t-lead em{font-style:italic;color:var(--amber)}
.light .t-lead em{color:var(--copper)}
.t-body{font-size:17px;max-width:62ch}
.t-small{font-size:14px;line-height:1.5}
.label{font:500 12px/1.3 var(--mono);letter-spacing:.14em;text-transform:uppercase;color:var(--amber);margin:0 0 18px}
.light .label{color:var(--copper)}
.mute{color:var(--mute-d)}
.light .mute{color:var(--mute-l)}
.prose{max-width:66ch}
.prose p{color:inherit}
.prose h3{margin:1.6em 0 .5em}

/* ---------- header ---------- */
.header{position:fixed;inset:0 0 auto 0;z-index:50;transition:color .35s,background-color .35s,transform .45s var(--ease)}
.header__in{display:flex;align-items:center;justify-content:space-between;gap:24px;height:84px}
.header .logo{display:block;width:132px;height:auto;line-height:0}
.header .logo svg{width:100%;height:auto;fill:currentColor}
.header nav{display:flex;gap:clamp(18px,2.2vw,38px);align-items:center}
.header nav a{text-decoration:none;font-size:15px;font-weight:600;opacity:.82;transition:opacity .2s}
.header nav a:hover,.header nav a[aria-current=page]{opacity:1}
.header nav a[aria-current=page]{box-shadow:0 1px 0 currentColor}
.header.on-light{color:var(--graphite)}
.header.is-hidden{transform:translateY(-100%)}
.header.is-solid{background:rgba(21,25,27,.9);backdrop-filter:blur(10px)}
.header.on-light.is-solid{background:rgba(238,240,235,.92)}
.menu-btn{display:none;background:none;border:0;color:inherit;font:600 15px "Public Sans";padding:10px 0;cursor:pointer}
.mobile-nav{position:fixed;inset:0;z-index:49;background:var(--indigo);color:var(--night-ink);display:flex;flex-direction:column;justify-content:center;padding:100px var(--gutter) 40px;gap:8px;visibility:hidden;opacity:0;transition:opacity .35s,visibility .35s}
.mobile-nav a{font-family:Fraunces,Georgia,serif;font-weight:300;font-size:40px;text-decoration:none;line-height:1.25}
.mobile-nav.is-open{visibility:visible;opacity:1}
@media (max-width:960px){.header nav{display:none}.menu-btn{display:block}.header .logo{width:112px}}

/* ---------- link point: a pterostigma cell before the words ---------- */
.lp{--h:24px;display:inline-flex;align-items:center;gap:12px;text-decoration:none;font-weight:600;font-size:17px;cursor:pointer;background:none;border:0;color:inherit;padding:6px 0;font-family:"Public Sans",sans-serif}
.lp__cell{width:16px;height:7px;flex:none;background:var(--amber);clip-path:polygon(0 100%,22% 0,100% 0,78% 100%);transition:transform .35s var(--ease)}
.light .lp__cell{background:var(--copper)}
.lp__flip{display:block;height:var(--h);overflow:hidden;padding:0 2px;margin:0 -2px}
.lp__in{display:block;transition:transform .38s var(--ease)}
.lp__a,.lp__b{display:flex;align-items:center;height:var(--h);white-space:nowrap}
.lp:hover .lp__in,.lp:focus-visible .lp__in{transform:translateY(calc(var(--h)*-1))}
.lp:hover .lp__cell{transform:scaleX(1.6)}
.lp--big{--h:clamp(34px,3.4vw,54px);font:300 clamp(28px,3vw,46px) Fraunces,Georgia,serif;letter-spacing:-.02em;gap:18px}
.lp--big .lp__cell{width:26px;height:11px}
.lp-row{display:flex;flex-wrap:wrap;gap:12px 36px}

/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;display:flex;align-items:flex-end}
.hero__canvas{position:absolute;inset:0;width:100%;height:100%;transform-origin:8% 30%}
.hero__shade{position:absolute;inset:auto 0 0 0;height:55%;background:linear-gradient(180deg,rgba(21,25,27,0),rgba(21,25,27,.94));pointer-events:none}
.hero__content{position:relative;z-index:2;width:100%;padding-bottom:clamp(48px,7vw,96px);padding-top:140px}
.hero h1{grid-column:6 / span 7}
.hero__aside{grid-column:1 / span 4;align-self:end;display:flex;flex-direction:column;gap:22px}
.hero__aside p{max-width:34ch;color:var(--mute-d);margin:0}
.hero__credit{font-size:12px;color:var(--mute-d);max-width:36ch;opacity:.8;margin:0}
.scroll-cue{display:flex;align-items:center;gap:12px;font-size:14px;color:var(--mute-d)}
.scroll-cue i{display:block;width:1px;height:42px;background:linear-gradient(var(--amber),transparent);animation:cue 2.4s ease-in-out infinite;transform-origin:top}
@keyframes cue{0%{transform:scaleY(0)}50%{transform:scaleY(1)}100%{transform:scaleY(1);opacity:0}}
@media (max-width:960px){
  .hero{align-items:flex-end}
  .hero h1,.hero__aside{grid-column:1 / -1}
  .hero__aside{order:2;margin-top:28px}
  .hero__credit{display:none}
}

/* page hero (inner pages) */
.phero{position:relative;overflow:hidden;padding:clamp(150px,18vw,240px) 0 clamp(72px,9vw,130px)}
.phero__canvas{position:absolute;inset:0;width:100%;height:100%;opacity:.55}
.phero .socket{position:relative;z-index:2}
.phero h1{max-width:15ch}
.phero p.t-lead{max-width:30ch;margin-top:32px;color:var(--mute-d)}

/* ---------- premise + vein-linked ideas ---------- */
.premise__lead{grid-column:6 / span 7}
.ideas{position:relative;margin-top:clamp(80px,10vw,160px)}
.ideas__svg{position:absolute;inset:0;width:100%;height:100%;overflow:visible;pointer-events:none}
.idea{display:grid;grid-template-columns:auto 1fr;gap:clamp(24px,3vw,56px);align-items:center;padding:clamp(40px,5vw,80px) 0}
.idea:nth-child(odd of .idea){margin-left:0;width:min(640px,52%)}
.idea:nth-child(even of .idea){margin-left:auto;width:min(640px,52%)}
.idea__fig{width:clamp(150px,15vw,240px);aspect-ratio:1;position:relative}
.idea__fig svg{width:100%;height:100%;overflow:visible}
.idea h3{margin-bottom:10px}
.idea p{color:var(--mute-d);margin:0;max-width:42ch}
.idea p.tr{color:var(--night-ink);margin-top:10px}
.idea__n{display:block;font-size:14px;color:var(--amber);font-weight:600;margin-bottom:8px}
@media (max-width:1024px){
  .ideas__svg{display:none}
  .idea:nth-child(odd of .idea),.idea:nth-child(even of .idea){width:100%;margin:0;grid-template-columns:96px 1fr;gap:20px;padding:28px 0;align-items:start}
  .idea__fig{width:96px}
  .premise__lead{grid-column:1 / -1}
}

/* cell figure states */
.cellfig .c{fill:none;stroke:var(--indigo-line);stroke-width:1;transition:stroke .6s,fill .6s}
.cellfig .core{fill:rgba(227,130,95,0);stroke:var(--indigo-line);stroke-width:1.2;transition:fill .7s .15s,stroke .6s}
.is-on .cellfig .c{stroke:var(--vein)}
.is-on .cellfig .core{fill:var(--amber);stroke:var(--amber)}
.light .cellfig .c{stroke:var(--rule-l)}
.light .is-on .cellfig .c{stroke:var(--graphite)}
.light .is-on .cellfig .core{fill:var(--copper);stroke:var(--copper)}

/* veins drawn as connectors */
.vein-main{fill:none;stroke:var(--copper);stroke-width:1.6;stroke-linecap:round}
.vein-twin{fill:none;stroke:var(--vein);stroke-width:1;opacity:.85}
.vein-x{stroke:var(--vein);stroke-width:.8;opacity:0;transition:opacity .25s}
.vein-x.on{opacity:.75}
.vein-dim{fill:none;stroke:var(--indigo-line);stroke-width:1}
.vein-pulse{fill:var(--amber)}
.light .vein-twin,.light .vein-x{stroke:#7f8796}
.light .vein-dim{stroke:var(--rule-l)}

/* ---------- method: pinned steps over a living cell field ---------- */
.method{position:relative;overflow:hidden}
.method__pin{position:relative;height:100vh;height:100svh;display:flex;align-items:center}
.method__field{position:absolute;inset:0;width:100%;height:100%}
.method__panel{position:relative;z-index:2;grid-column:1 / span 5;background:rgba(238,240,235,.92);padding:clamp(24px,3vw,44px) 0;backdrop-filter:blur(2px)}
.method__count{font-size:15px;color:var(--mute-l);margin-bottom:22px;font-variant-numeric:tabular-nums}
.method__steps{position:relative;min-height:260px}
.step{position:absolute;inset:0;opacity:0;transform:translateY(18px);transition:opacity .5s,transform .6s var(--ease);pointer-events:none}
.step.is-active{opacity:1;transform:none;pointer-events:auto}
.step h3{margin-bottom:14px}
.step p{color:var(--mute-l);max-width:42ch}
.method__nav{display:flex;gap:10px;margin-top:28px}
.arrow{width:52px;height:52px;border-radius:50%;border:1px solid var(--rule-l);background:transparent;color:inherit;cursor:pointer;display:grid;place-items:center;transition:background .25s,border-color .25s}
.arrow:hover:not(:disabled){background:var(--graphite);color:var(--membrane);border-color:var(--graphite)}
.dark .arrow{border-color:var(--indigo-line)}
.dark .arrow:hover:not(:disabled){background:#fff;color:var(--indigo);border-color:var(--night-ink)}
.arrow:disabled{opacity:.35;cursor:default}
.arrow svg{width:20px;height:16px}
@media (max-width:960px){
  .method__panel{grid-column:1 / -1;background:rgba(238,240,235,.88)}
}

/* ---------- marquee ---------- */
.marquee{overflow:hidden;padding:clamp(56px,7vw,110px) 0;border-top:1px solid var(--indigo-line);border-bottom:1px solid var(--indigo-line)}
.marquee__track{display:flex;width:max-content;animation:mq 46s linear infinite}
.marquee__track span{font-family:Fraunces,Georgia,serif;font-weight:300;font-size:clamp(44px,6vw,96px);letter-spacing:-.02em;padding-right:.55em;display:inline-flex;align-items:center;gap:.55em;white-space:nowrap}
.marquee__track span::after{content:"";width:.42em;height:.18em;background:var(--amber);clip-path:polygon(0 100%,22% 0,100% 0,78% 100%)}
@keyframes mq{to{transform:translateX(-50%)}}
.marquee__intro{display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap;margin-bottom:clamp(32px,4vw,56px)}
.marquee__intro p{max-width:46ch;color:var(--mute-d);margin:0}

/* ---------- fan stat ---------- */
.fan{position:relative;overflow:hidden}
.fan__pin{height:100vh;height:100svh;position:relative}
.fan__svg{position:absolute;left:0;bottom:0;width:100%;height:100%}
.fan__text{position:absolute;right:var(--gutter);top:50%;transform:translateY(-50%);z-index:2;max-width:min(560px,46vw);text-align:right}
.fan__num{font-family:Fraunces,Georgia,serif;font-weight:200;font-size:clamp(96px,15vw,250px);line-height:.9;letter-spacing:-.04em;font-variant-numeric:tabular-nums;font-variation-settings:"opsz" 144}
.fan__num small{font-size:.38em;color:var(--amber);margin-left:.08em}
.fan__text p{color:var(--mute-d);margin:22px 0 0 auto;max-width:36ch}
.fan__area{font-size:15px;color:var(--vein);margin-top:12px;font-variant-numeric:tabular-nums}
.fan-membrane{transition:none}
@media (max-width:760px){.fan__text{left:var(--gutter);right:var(--gutter);top:auto;bottom:10vh;transform:none;max-width:none}}

/* ---------- fold types ---------- */
.folds__head{display:flex;justify-content:space-between;align-items:flex-end;gap:32px;flex-wrap:wrap;margin-bottom:clamp(40px,5vw,72px)}
.folds__head p{max-width:46ch;color:var(--mute-l);margin:0}
.rail{display:grid;grid-auto-flow:column;grid-auto-columns:minmax(280px,30%);gap:clamp(16px,2vw,28px);overflow-x:auto;scroll-snap-type:x mandatory;padding-bottom:24px;scrollbar-width:thin;scrollbar-color:var(--copper) transparent;padding-left:var(--gutter);padding-right:var(--gutter);scroll-padding-left:var(--gutter)}
.rail::-webkit-scrollbar{height:4px}.rail::-webkit-scrollbar-thumb{background:var(--copper)}
.fold{scroll-snap-align:start;display:flex;flex-direction:column}
.fold__img{aspect-ratio:4/3.4;background:#f4f1e6;overflow:hidden;display:grid;place-items:center;border:1px solid var(--rule-l)}
.fold__img img{width:100%;height:100%;object-fit:contain;mix-blend-mode:multiply}
.fold__id{display:flex;justify-content:space-between;align-items:baseline;margin:20px 0 6px;font-size:15px;color:var(--mute-l);font-variant-numeric:tabular-nums}
.fold__id b{font-weight:600;color:var(--copper)}
.fold h3{margin-bottom:10px}
.fold p{color:var(--mute-l);font-size:16px;margin:0}
.fold__x{font-family:Fraunces,Georgia,serif;font-size:30px;font-weight:300;color:var(--graphite)}
@media (max-width:760px){.rail{grid-auto-columns:82%}}
.rail-nav{display:flex;align-items:center;gap:16px}
.rail-nav span{font-size:15px;color:var(--mute-l);font-variant-numeric:tabular-nums;min-width:4.5em;text-align:center}

/* ---------- cases ---------- */
.cases__list{border-top:1px solid var(--indigo-line)}
.case{display:grid;grid-template-columns:minmax(0,4fr) minmax(0,4fr) minmax(0,4fr);gap:clamp(16px,2.6vw,44px);padding:clamp(28px,3vw,44px) 0;border-bottom:1px solid var(--indigo-line);position:relative}
.case h3{font-size:clamp(23px,2vw,30px)}
.case__meta{display:block;font-size:14px;color:var(--mute-d);margin-top:8px}
.case p{margin:0;color:var(--mute-d)}
.case p.lesson{color:var(--night-ink)}
.case__vein{position:absolute;left:0;bottom:-1px;height:1px;width:100%;background:var(--copper);transform:scaleX(0);transform-origin:left;transition:transform .9s var(--ease)}
.case:hover .case__vein{transform:scaleX(1)}
.case__k{font-size:13px;color:var(--amber);font-weight:600;display:block;margin-bottom:6px}
@media (max-width:860px){.case{grid-template-columns:1fr}}

/* ---------- mask reveal ---------- */
.reveal{position:relative}
.reveal__pin{height:100vh;height:100svh;position:relative;overflow:hidden;display:grid;place-items:center}
.reveal__media{position:absolute;inset:0;clip-path:inset(38% 30% 38% 30%);will-change:clip-path}
.reveal__media img{width:100%;height:100%;object-fit:cover;filter:saturate(.9)}
.reveal__media::after{content:"";position:absolute;inset:0;background:linear-gradient(rgba(21,25,27,.15),rgba(21,25,27,.5))}
.reveal__title{position:relative;z-index:2;text-align:center;padding:0 var(--gutter);pointer-events:none}
.reveal__title .a,.reveal__title .b{display:block}
.reveal__credit{position:absolute;bottom:20px;right:var(--gutter);z-index:3;font-size:12px;color:var(--night-ink);opacity:.75}

/* ---------- values ---------- */
.values{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:0;border-top:1px solid var(--rule-l)}
.value{padding:clamp(26px,3vw,44px) clamp(18px,2vw,32px) clamp(30px,3vw,48px) 0;border-bottom:1px solid var(--rule-l)}
.value:nth-child(3n+2),.value:nth-child(3n+3){padding-left:clamp(18px,2vw,32px);border-left:1px solid var(--rule-l)}
.value h3{font-size:clamp(22px,1.8vw,28px);margin:6px 0 12px}
.value p{color:var(--mute-l);font-size:16px;margin:0}
.value__k{font-size:14px;font-weight:600;color:var(--copper)}
@media (max-width:900px){.values{grid-template-columns:1fr}.value:nth-child(n){padding-left:0;border-left:0}}

/* ---------- questions ---------- */
.faq{grid-column:5 / span 8}
.faq details{border-top:1px solid var(--rule-l)}
.faq details:last-child{border-bottom:1px solid var(--rule-l)}
.faq summary{list-style:none;cursor:pointer;padding:26px 56px 26px 0;position:relative;font-family:Fraunces,Georgia,serif;font-weight:300;font-size:clamp(22px,1.9vw,29px);line-height:1.25}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"";position:absolute;right:6px;top:50%;width:18px;height:8px;background:var(--copper);clip-path:polygon(0 100%,22% 0,100% 0,78% 100%);transition:transform .35s var(--ease)}
.faq details[open] summary::after{transform:rotate(90deg)}
.faq .ans{padding:0 0 28px;color:var(--mute-l);max-width:62ch}
.faq-head{grid-column:1 / span 4}
@media (max-width:960px){.faq,.faq-head{grid-column:1 / -1}.faq-head{margin-bottom:32px}}

/* ---------- inner page blocks ---------- */
.split{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));column-gap:clamp(12px,2vw,32px);row-gap:28px}
.split__l{grid-column:1 / span 4}
.split__r{grid-column:6 / span 7}
@media (max-width:960px){.split__l,.split__r{grid-column:1 / -1}}
.levels{counter-reset:lv}
.level{display:grid;grid-template-columns:clamp(120px,12vw,180px) 1fr;gap:clamp(20px,3vw,48px);padding:clamp(28px,3vw,44px) 0;border-top:1px solid var(--indigo-line);align-items:start}
.level:last-child{border-bottom:1px solid var(--indigo-line)}
.level__fig svg{width:100%;height:auto;overflow:visible}
.level h3{margin-bottom:8px}
.level p{color:var(--mute-d);margin:0;max-width:56ch}
.level .tr{color:var(--night-ink);margin-top:10px}
.light .level{border-color:var(--rule-l)}
.light .level p{color:var(--mute-l)}
.light .level .tr{color:var(--graphite)}

.table-wrap{overflow-x:auto;margin:0 calc(var(--gutter)*-1);padding:0 var(--gutter)}
table.t{border-collapse:collapse;width:100%;min-width:760px;font-size:16px}
table.t th{text-align:left;font-weight:600;font-size:14px;color:var(--mute-l);padding:0 18px 14px 0;border-bottom:1px solid var(--graphite);vertical-align:bottom}
table.t td{padding:18px 18px 18px 0;border-bottom:1px solid var(--rule-l);vertical-align:top}
table.t td:first-child{font-family:Fraunces,Georgia,serif;font-size:21px;font-weight:300;width:20%}
.dark table.t th{color:var(--mute-d);border-color:var(--night-ink)}
.dark table.t td{border-color:var(--indigo-line)}
.dark table.t td:not(:first-child){color:var(--mute-d)}

.crotty{position:relative;margin-top:48px}
.crotty__cols{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:clamp(28px,4.4vw,80px);position:relative;z-index:2}
.crotty__col h4{font-family:"Public Sans";font-weight:600;font-size:15px;color:var(--amber);margin:0 0 14px}
.crotty__col .node{background:var(--indigo-2);padding:18px 18px 20px;margin-bottom:14px;position:relative}
.crotty__col .node b{display:block;font-family:Fraunces,Georgia,serif;font-weight:300;font-size:22px;margin-bottom:6px}
.crotty__col .node span{display:block;color:var(--mute-d);font-size:15px;line-height:1.5}
.crotty__svg{position:absolute;inset:0;width:100%;height:100%;z-index:1;overflow:visible;pointer-events:none}
@media (max-width:900px){.crotty__cols{grid-template-columns:1fr}.crotty__svg{display:none}}

.rq{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0;border-top:1px solid var(--rule-l)}
.rq__item{padding:30px 32px 34px 0;border-bottom:1px solid var(--rule-l)}
.rq__item:nth-child(even){padding-left:32px;border-left:1px solid var(--rule-l)}
.rq__item b{display:block;color:var(--copper);font-size:14px;margin-bottom:10px}
.rq__item p{font-family:Fraunces,Georgia,serif;font-weight:300;font-size:clamp(20px,1.6vw,25px);line-height:1.32;margin:0}
@media (max-width:860px){.rq{grid-template-columns:1fr}.rq__item:nth-child(n){padding-left:0;border-left:0}}

.guards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:clamp(16px,2.4vw,40px)}
.guard{border-top:2px solid var(--copper);padding-top:22px}
.guard h3{font-size:clamp(22px,1.8vw,28px);margin-bottom:10px}
.guard p{color:var(--mute-d);margin:0}
.light .guard p{color:var(--mute-l)}
@media (max-width:860px){.guards{grid-template-columns:1fr}}

.plate{margin:0}
.plate img{width:100%;height:auto;background:#f4f1e6}
.plate figcaption{font-size:14px;color:var(--mute-l);margin-top:12px;max-width:60ch;line-height:1.5}
.dark .plate figcaption{color:var(--mute-d)}
.plates{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:clamp(16px,2vw,32px);align-items:start}

.ws{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));column-gap:clamp(12px,2vw,32px);row-gap:24px;padding:clamp(48px,6vw,96px) 0;border-top:1px solid var(--rule-l)}
.ws__img{grid-column:1 / span 5}
.ws__txt{grid-column:7 / span 6}
.ws:nth-child(even) .ws__img{grid-column:8 / span 5;order:2}
.ws:nth-child(even) .ws__txt{grid-column:1 / span 6;order:1}
.ws__id{font-size:15px;color:var(--copper);font-weight:600;margin-bottom:10px}
.ws__sp{font-style:italic;color:var(--mute-l);margin:6px 0 20px}
.ws__fig{display:flex;gap:32px;flex-wrap:wrap;margin:24px 0;padding:18px 0;border-top:1px solid var(--rule-l);border-bottom:1px solid var(--rule-l);font-variant-numeric:tabular-nums}
.ws__fig div span{display:block;font-size:13px;color:var(--mute-l)}
.ws__fig div b{font-family:Fraunces,Georgia,serif;font-weight:300;font-size:28px}
.ws__lesson{color:var(--graphite)}
@media (max-width:960px){.ws__img,.ws__txt,.ws:nth-child(even) .ws__img,.ws:nth-child(even) .ws__txt{grid-column:1 / -1;order:0}}

.elements{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:clamp(16px,2.4vw,40px)}
.element{padding-top:22px;border-top:1px solid var(--indigo-line)}
.element h3{font-size:clamp(22px,1.8vw,28px);margin-bottom:10px}
.element p{margin:0 0 8px;color:var(--mute-d);font-size:16px}
.element p.p2{color:var(--night-ink)}
@media (max-width:860px){.elements{grid-template-columns:1fr}}

.timeline{position:relative;padding-left:clamp(28px,4vw,64px)}
.timeline__svg{position:absolute;left:0;top:0;width:clamp(28px,4vw,64px);height:100%;overflow:visible}
.tl{padding:0 0 clamp(36px,4vw,56px)}
.tl b{display:block;font-family:Fraunces,Georgia,serif;font-weight:300;font-size:clamp(28px,2.6vw,40px);color:var(--amber);line-height:1}
.light .tl b{color:var(--copper)}
.tl h3{font-size:clamp(22px,1.8vw,28px);margin:10px 0 8px}
.tl p{color:var(--mute-d);max-width:56ch;margin:0}
.light .tl p{color:var(--mute-l)}

.next{display:flex;justify-content:space-between;align-items:center;gap:24px;flex-wrap:wrap;padding:clamp(56px,7vw,100px) 0;border-top:1px solid var(--indigo-line)}
.next span{color:var(--mute-d);font-size:15px;display:block;margin-bottom:8px}

/* ---------- footer ---------- */
.footer{position:relative;overflow:hidden;padding:clamp(90px,11vw,170px) 0 40px;background:var(--indigo)}
.footer__canvas{position:absolute;inset:0;width:100%;height:100%;opacity:.35}
.footer .socket{position:relative;z-index:2}
.footer__cta{max-width:16ch}
.footer__grid{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));column-gap:clamp(12px,2vw,32px);row-gap:36px;margin-top:clamp(56px,7vw,110px);padding-top:36px;border-top:1px solid var(--indigo-line)}
.footer__brand{grid-column:1 / span 4}
.footer__brand svg{width:180px;height:auto;fill:#fff}
.footer__nav{grid-column:6 / span 3;display:flex;flex-direction:column;gap:6px}
.footer__nav a{text-decoration:none;color:var(--mute-d)}
.footer__nav a:hover{color:var(--night-ink)}
.footer__country{grid-column:9 / span 4;color:var(--mute-d);font-size:15px}
.footer__base{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-top:56px;font-size:13px;color:var(--mute-d)}
@media (max-width:860px){.footer__brand,.footer__nav,.footer__country{grid-column:1 / -1}}

/* word reveal: used for one statement per page only */
.wr .w{display:inline-block;opacity:.12;transition:opacity .5s}
.wr .w.on{opacity:1}

@media (prefers-reduced-motion:reduce){
  .marquee__track{animation:none}
  .scroll-cue i{animation:none}
  *{transition-duration:.01ms!important}
  .wr .w{opacity:1}
}

.dark .values,.dark .value,.dark .value:nth-child(3n+2),.dark .value:nth-child(3n+3){border-color:var(--indigo-line)}
.dark .value p{color:var(--mute-d)}
.dark .value__k{color:var(--amber)}
.plates .plate img{max-height:560px;object-fit:contain}

@media (max-width:960px){.grid > *{grid-column:1 / -1 !important}.grid > * + *{margin-top:20px}}
@media (max-width:760px){.fan__num{font-size:96px}.fan__text{bottom:6vh}}

/* Treatise conventions: mono for identifiers, counts and captions; graph paper under the light pages */
.light{background-color:var(--paper);background-image:linear-gradient(var(--grid-faint) 1px,transparent 1px),linear-gradient(90deg,var(--grid-faint) 1px,transparent 1px);background-size:40px 40px}
.idea__n,.value__k,.case__k,.fold__id,.method__count,.ws__id,.rail-nav span,.crotty__col h4,.rq__item b,.footer__base,.case__meta,.fan__area,.plate figcaption{font-family:var(--mono);letter-spacing:.06em}
.idea__n,.value__k,.case__k,.ws__id,.crotty__col h4,.rq__item b{text-transform:uppercase;font-size:12px;letter-spacing:.12em;font-weight:500}
.fold__id b{font-weight:500;background:var(--ink);color:var(--paper);padding:3px 8px;letter-spacing:.1em}
.fold__img{background:var(--paper);border-color:var(--grid-strong)}
.fold__img img{mix-blend-mode:normal;object-fit:contain}
.plate figcaption{font-size:12px;line-height:1.55}
.method__panel{background:rgba(238,240,235,.92)}
table.t th{font-family:var(--mono);font-weight:500;font-size:12px;letter-spacing:.1em;text-transform:uppercase}
.fold__src{font:400 12px/1.5 var(--mono);color:var(--muted);margin:8px 0 0;letter-spacing:.02em}