/* ============================================================
   OpenRSI Index — stylesheet, "star trails"
   A dark long-exposure hero, then a long-form page set after the
   Anthropic model announcement: a warm off-white ground, a text serif
   for everything read, a grotesk for the interface, square boxes ruled
   in ink. Loaded after style.css everywhere; the token block below
   re-tints the legacy parts.
   ============================================================ */

:root {
  --bg: #faf9f5;
  --bg-2: #f3f1ea;
  --panel: #faf9f5;
  --line: #141413;
  --line-2: #dedbd2;
  --text: #141413;
  --text-2: #3f3e3a;
  --text-3: #5e5d59;
  --muted-2: #87867f;
  --sage: #ced6bf;
  --sage-ink: #788c5d;
  --blue: #3b7cf0;
  --cyan: #1fb9d8;
  --amber: #d98b1a;
  --violet: #9b5fe0;

  /* legacy token names (style.css), kept on the light ground */
  --paper: #faf9f5;
  --paper-2: #faf9f5;
  --surface: #f0eee6;
  --line-soft: #dedbd2;
  --ink: #141413;
  --muted: #3f3e3a;
  --faint: #5e5d59;
  --accent: #3b7cf0;
  --accent-deep: #2560cc;
  --accent-bright: #2560cc;
  --accent-soft: #e6eeff;
  --field: #06090f;
  --field-2: #0b1019;
  --field-3: #121a29;
  --field-line: rgba(140, 170, 230, 0.16);
  --field-text: #f2f5fc;
  --field-body: #b6bfd3;
  --field-muted: #7a849c;
  --shadow-soft: none;
  --shadow-lift: none;

  --font-serif: "Source Serif 4", "Iowan Old Style", "Palatino Linotype", Georgia, serif;
  --font-sans: "Instrument Sans", "Helvetica Neue", Helvetica, Arial, system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --serif: var(--font-serif);
  --sans: var(--font-sans);
  --mono: var(--font-mono);

  --col: 640px;
  --wide: 1120px;
  --max: 1360px;
  --maxw: 1360px;
  --gutter: clamp(20px, 4vw, 48px);
  --radius: 0px;
  --ease: cubic-bezier(0.23, 1, 0.32, 1);
}

* { box-sizing: border-box; }
html { background: var(--bg); color-scheme: light; scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
::selection { background: var(--sage); color: var(--text); }
a { color: inherit; text-decoration: underline; text-decoration-color: rgba(20, 20, 19, 0.4); text-underline-offset: 3px; text-decoration-thickness: 1px; }
a:hover { text-decoration-color: currentColor; }
img, svg { max-width: 100%; }
button { font: inherit; color: inherit; }

/* ---------------- nav ---------------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 20;
  height: 64px; display: flex; align-items: center;
  color: var(--text);
  transition: background 0.3s ease, color 0.3s ease;
}
.nav.scrolled { background: rgba(250, 249, 245, 0.85); -webkit-backdrop-filter: blur(14px); backdrop-filter: blur(14px); }
.nav.over-dark { color: #fff; background: transparent; }
.nav.over-dark.scrolled { background: rgba(0, 0, 0, 0.35); }
.nav-inner {
  width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 var(--gutter);
  display: flex; align-items: center; gap: 28px;
}
.brand { display: inline-flex; align-items: center; gap: 10px; font-size: 15px; font-weight: 500; letter-spacing: -0.01em; text-decoration: none; white-space: nowrap; color: inherit; }
.brand svg { width: 22px; height: 22px; flex: none; }
.nav-links { margin-left: auto; display: flex; gap: 4px; }
.nav-links a { font-size: 14px; color: inherit; opacity: 0.72; text-decoration: none; padding: 8px 12px; border-radius: 999px; white-space: nowrap; transition: opacity 0.2s ease, background 0.2s ease; }
.nav-links a:hover, .nav-links a.active { opacity: 1; background: rgba(20, 20, 19, 0.06); }
.nav.over-dark .nav-links a:hover, .nav.over-dark .nav-links a.active { background: rgba(255, 255, 255, 0.1); }
.nav-toggle { display: none; }

/* ---------------- hero: the long exposure ---------------- */
.hero {
  position: relative;
  min-height: 100vh; min-height: 100svh;
  display: grid; grid-template-rows: 1fr auto;
  padding: 64px var(--gutter) 36px;
  background: #06090f; color: #fff;
  overflow: hidden; user-select: none;
  --hero: 0;
}
.hero .sky-frame { position: absolute; inset: 0; z-index: 0; overflow: hidden; background: #06090f; }
/* Keep the entire hero backdrop at the viewport edge during top overscroll.
   Below the top, it stays in the document and scrolls with the hero as usual. */
.hero.sky-anchored { overflow: visible; }
.hero.sky-anchored .sky-frame {
  position: fixed; bottom: auto; height: 100vh; height: 100svh;
}
.hero .sky { position: absolute; inset: 0; z-index: 0; background: #06090f; animation: sky-in 1.4s ease both; transform: scale(calc(1 + var(--hero) * 0.06)); opacity: calc(1 - var(--hero) * 0.45); }
.hero .sky canvas { display: block; width: 100%; height: 100%; }
.hero .sky-frame::after {
  content: ""; position: absolute; inset: 0; z-index: 1; pointer-events: none;
  background: radial-gradient(ellipse at 50% 46%, transparent 42%, rgba(4, 7, 15, 0.18) 70%, rgba(4, 7, 15, 0.62) 100%);
}
@keyframes sky-in { from { opacity: 0; } to { opacity: 1; } }
.hero-labels, .hero-foot, .replay { position: relative; z-index: 2; }
.hero-labels {
  position: absolute; left: 0; right: 0; top: 40%; transform: translateY(-50%);
  display: flex; flex-direction: column; justify-content: center; align-items: center; gap: 22px; text-align: center;
  padding: 0 var(--gutter);
  pointer-events: none;
}
.hero-labels .hero-kicker { opacity: 0; animation: fade-up 1.2s ease both; animation-delay: 2.1s; font-family: var(--font-serif); font-size: clamp(17px, 1.6vw, 22px); letter-spacing: 0.02em; text-transform: none; color: rgba(255, 255, 255, 0.72); text-shadow: 0 0 24px rgba(0, 0, 0, 0.8), 0 0 8px rgba(0, 0, 0, 0.6); }
.hero h1 { display: contents; font-family: var(--font-serif); font-weight: 400; font-size: clamp(44px, 5.6vw, 84px); letter-spacing: -0.015em; line-height: 1; margin: 0; }
.hl { display: inline-block; white-space: nowrap; }
.hl { white-space: normal; text-shadow: 0 0 40px rgba(0, 0, 0, 0.8), 0 0 12px rgba(0, 0, 0, 0.6); }
.hl .ch { display: inline-block; opacity: 0; animation: hl-in 1.1s var(--ease) both; animation-delay: calc(0.85s + var(--i) * 0.06s); }
.hl .ch:empty::after { content: "\00a0"; }
@keyframes hl-in {
  from { opacity: 0; transform: translateY(10px); filter: blur(6px); }
  to { opacity: 1; transform: none; filter: blur(0); }
}
.hero-foot { grid-row: 2; display: grid; justify-items: center; gap: 20px; text-align: center; padding-bottom: 8px; opacity: calc(1 - var(--hero) * 1.4); }
.hero-foot > * { opacity: 0; animation: fade-up 1.2s ease both; }
.hero-kicker { animation-delay: 2.1s; }
.hero-q { animation-delay: 2.4s; }
.toc { animation-delay: 2.9s; }
.scroll-label { animation-delay: 3.6s; }
@keyframes fade-up { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
.hero-kicker { margin: 0; font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.2em; text-transform: uppercase; color: rgba(255, 255, 255, 0.6); }
.hero-q {
  margin: 0; font-family: var(--font-serif); font-size: clamp(19px, 1.9vw, 25px); line-height: 1.35; color: #fff; max-width: 30em;
  text-wrap: balance; text-shadow: 0 0 28px #000, 0 0 10px #000;
}
.toc { list-style: none; margin: 4px 0 0; padding: 0; font-family: var(--font-serif); font-size: 16px; color: rgba(255, 255, 255, 0.82); width: min(440px, 100%); text-shadow: 0 0 12px #000; }
.toc li { display: flex; align-items: baseline; gap: 10px; padding: 3px 0; }
.toc .n { font-family: var(--font-mono); font-size: 12px; color: rgba(255, 255, 255, 0.55); }
.toc .lead { flex: 1; border-bottom: 1px dotted rgba(255, 255, 255, 0.4); transform: translateY(-5px); }
.toc a { text-decoration: none; color: #fff; }
.toc a:hover { text-decoration: underline; }
.scroll-label { margin: 0; font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.2em; text-transform: uppercase; color: rgba(255, 255, 255, 0.5); }
.replay {
  position: absolute; right: var(--gutter); bottom: 22px; width: 40px; height: 40px;
  border-radius: 50%; border: 1px solid rgba(255, 255, 255, 0.2); background: rgba(255, 255, 255, 0.06); color: #fff;
  display: grid; place-items: center; cursor: pointer; padding: 0;
  -webkit-backdrop-filter: blur(8px); backdrop-filter: blur(8px);
  transition: background 0.2s ease, border-color 0.2s ease;
}
.replay:hover { background: rgba(255, 255, 255, 0.14); border-color: rgba(255, 255, 255, 0.4); }
.replay svg { display: block; }

/* ---------------- article ---------------- */
.longform { max-width: var(--max); margin: 0 auto; padding: 0 var(--gutter); }
.sec { padding: clamp(64px, 8vw, 112px) 0 clamp(24px, 3vw, 48px); scroll-margin-top: 64px; }
.col { width: min(var(--col), 100%); margin: 0 auto; }
.kicker, .eyebrow {
  font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--text-3); margin: 0 0 18px;
}
.sec h2 { font-family: var(--font-serif); font-weight: 400; font-size: clamp(28px, 2.8vw, 36px); line-height: 1.2; letter-spacing: -0.01em; margin: 0 0 20px; color: var(--text); text-wrap: balance; }
.sec .sec-title { display: block; max-width: 22ch; margin: 0 auto clamp(28px, 3.5vw, 48px); text-align: center; font-weight: 500; font-size: clamp(34px, 3.6vw, 46px); line-height: 1.12; letter-spacing: -0.01em; }
.sec .sec-title-with-note { margin-bottom: 14px; }
.sec .sample-preview-note { max-width: 80ch; margin: 0 auto clamp(28px, 3.5vw, 48px); font-family: var(--font-sans); font-size: 14.4px; line-height: 1.55; color: var(--text-3); text-align: center; text-wrap: balance; }
.sec.lead h2 { font-size: clamp(34px, 3.6vw, 48px); line-height: 1.12; letter-spacing: -0.015em; margin-bottom: 26px; }
.sec .sec-title.sec-title-name { max-width: none; font-weight: 400; font-size: clamp(52px, 6.4vw, 92px); line-height: 1.0; letter-spacing: -0.02em; margin-bottom: clamp(30px, 3.6vw, 52px); }
.sec h3 { font-family: var(--font-serif); font-weight: 500; font-size: 22px; line-height: 1.3; margin: 40px 0 12px; color: var(--text); }
.col p { margin: 0 0 18px; font-family: var(--font-serif); font-size: 17.5px; line-height: 1.55; color: var(--text); }
.col p b, .col li b { font-weight: 600; }
.col p.big { font-size: clamp(21px, 2vw, 26px); line-height: 1.35; letter-spacing: 0; }
.col p.note { font-family: var(--font-sans); font-size: 14.4px; color: var(--text-3); }
.col p:last-child { margin-bottom: 0; }
.col .kicker { font-family: var(--font-mono); font-size: 12px; line-height: 1.5; color: var(--text-3); }

.points { list-style: none; margin: 8px 0 26px; padding: 0; }
.points li { border-top: 1px solid rgba(59, 124, 240, 0.28); padding: 16px 0 18px; display: grid; grid-template-columns: 44px 1fr; gap: 4px 12px; }
.points li:last-child { border-bottom: 1px solid rgba(59, 124, 240, 0.28); }
.points span { font-family: var(--font-mono); font-size: 12.5px; font-weight: 500; letter-spacing: 0.1em; color: var(--blue); padding-top: 5px; }
.points b { font-family: var(--font-sans); font-size: 18px; font-weight: 700; line-height: 1.3; letter-spacing: -0.005em; color: var(--text); }
.points p { grid-column: 2; margin: 0; font-family: var(--font-serif); font-size: 16.5px; line-height: 1.5; color: var(--text-2); }
/* the thesis: a title-sized heading with its argument beside it (main's layout) */
.sec .thesis-grid { width: min(var(--wide), 100%); margin: clamp(40px, 5vw, 72px) auto 0; display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.55fr); gap: 24px clamp(32px, 5vw, 80px); align-items: start; }
.sec .thesis-head { position: sticky; top: 92px; }
.sec .thesis-title { font-family: var(--font-serif); font-weight: 500; font-size: clamp(28px, 2.9vw, 38px); line-height: 1.15; letter-spacing: -0.01em; margin: 0; color: var(--text); text-wrap: balance; max-width: none; }
.sec .thesis-body { display: block; padding-top: 6px; }
.sec .thesis-body > p { margin: 0 0 20px; font-family: var(--font-serif); font-size: 17.5px; line-height: 1.6; color: var(--text-2); max-width: none; }
.sec .thesis-body > p:first-child { font-size: clamp(19px, 1.6vw, 21px); line-height: 1.45; color: var(--text); margin-bottom: 26px; }
.sec .thesis-body .points { margin-top: 4px; }
.sec .thesis-body > p:last-child { margin-bottom: 0; }
.sec .thesis-body b { font-family: var(--font-sans); font-weight: 700; font-size: 0.97em; letter-spacing: -0.005em; color: var(--text); }

/* the chain: three plain stations and two arrows, the last one inked */
.chain-row { width: min(var(--wide), 100%); margin: clamp(36px, 4vw, 56px) auto 0; display: grid; grid-template-columns: 1fr auto 1fr auto 1fr; align-items: stretch; gap: 0 12px; }
.chain-step { display: flex; flex-direction: column; justify-content: center; gap: 8px; padding: clamp(20px, 2.4vw, 30px) clamp(18px, 2.4vw, 30px); border: 1px solid var(--text); border-radius: 0; background: var(--bg); text-align: center; }
.chain-step .k { font-family: var(--font-mono); font-size: 11.5px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--text-3); }
.chain-step .v { font-family: var(--font-serif); font-size: clamp(20px, 2vw, 26px); line-height: 1.2; letter-spacing: -0.01em; color: var(--text); text-wrap: balance; }
.chain-step.last { background: #d7e3fa; border: 3px solid var(--text); }
.chain-step.last .k { color: var(--text-2); }
.chain-step.last .v { color: var(--text); font-weight: 600; }
.chain-arrow { display: grid; place-items: center; font-family: var(--font-serif); font-size: clamp(26px, 2.6vw, 34px); color: var(--text-2); }

.col .partners { display: flex; flex-wrap: wrap; align-items: baseline; gap: 8px 22px; margin: 4px 0 20px; font-family: var(--font-serif); font-size: clamp(24px, 2.6vw, 32px); font-weight: 400; letter-spacing: -0.01em; }
.partners i { font-style: normal; color: var(--text-3); }
.col .contacts { display: flex; flex-wrap: wrap; gap: 8px 20px; font-family: var(--font-mono); font-size: 13px; color: var(--text-2); }
.contacts a { text-decoration: none; color: var(--text); border-bottom: 1px solid rgba(25, 25, 23, 0.3); padding-bottom: 1px; }
.contacts a:hover { border-color: currentColor; }
.qs { list-style: none; margin: 0 0 22px; padding: 0; border-top: 1px solid var(--line); }
.qs li { padding: 14px 0; border-bottom: 1px solid var(--line); font-family: var(--font-serif); font-size: 21px; line-height: 1.35; text-wrap: pretty; }
.actions { margin: 24px 0; }
.col .btn, a.btn {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--text); color: #fff; border: 0; border-radius: 6px; padding: 12px 18px;
  font-family: var(--font-sans); font-size: 15px; font-weight: 500; letter-spacing: 0; text-decoration: none; transition: background 0.2s ease; transform: none; box-shadow: none;
}
.col .btn:hover, a.btn:hover { background: #000; text-decoration: none; transform: none; }

/* the two calls keep their original markup; the card chrome is stripped further down */
.longform section.block#contribute, .longform section.block#compute { background: none; }
.longform #contribute { margin-top: 0; }
.longform #contribute .cfc-shell, .longform #compute .pcard { border-radius: 0 !important; }
.longform section.block + section.block { border-top: 0; }
footer.site { background: transparent; color: var(--text); }
footer.site .footer-brand .wm, footer.site .footer-brand .dex { color: var(--text); }
footer.site .footer-brand .dex { color: var(--text-2); }
footer.site .footer-line, footer.site .footer-base { color: var(--text-3); }
footer.site h4 { color: var(--text-3); }
footer.site a { color: var(--text-2); }
footer.site a:hover { color: var(--text); }

/* the partners: the two campus cards, the logo row, the acknowledgement; no band */
.partners-wide { width: min(var(--wide), 100%); margin: 8px auto 0; }
.partners-wide .li-row { margin: 0 auto 28px; justify-content: center; }
.partners-wide .logo-marquee { margin: 0 0 22px; }
.partners-wide .partners-ack { max-width: 62ch; margin: 0 auto; text-align: center; font-family: var(--font-sans); font-size: 14.4px; line-height: 1.5; color: var(--text-3); }
.partners-wide .li-card { border-radius: 0; }

/* the two calls: soft panels, no border */
.call {
  width: min(var(--wide), 100%); margin: 22px auto 0;
  display: grid; grid-template-columns: 1.05fr 1fr; gap: clamp(24px, 4vw, 64px); align-items: start;
  padding: clamp(28px, 3.5vw, 48px); border-radius: 20px; background: var(--bg-2);
}
.call h2 { font-family: var(--font-serif); font-weight: 400; font-size: clamp(28px, 2.8vw, 36px); line-height: 1.2; letter-spacing: -0.01em; margin: 0 0 18px; }
.call p { margin: 0 0 16px; font-family: var(--font-serif); font-size: 18px; line-height: 1.55; color: var(--text); }
.call p b { font-weight: 600; }
.call .qs { margin: 0 0 20px; }
.call .qs li { font-size: 20px; }
.call .actions { margin: 22px 0 18px; }
.call .kicker, .call .contacts { font-family: var(--font-mono); font-size: 13px; line-height: 1.6; color: var(--text-2); }
.call .kicker { font-size: 12px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--text-3); margin: 6px 0 14px; }
.call .contacts { display: flex; flex-wrap: wrap; gap: 8px 20px; }
.call .contacts.stack { flex-direction: column; gap: 10px; }
.call .contacts a { text-decoration: none; color: var(--text); border-bottom: 1px solid rgba(25, 25, 23, 0.3); padding-bottom: 1px; }
.call .contacts a:hover { border-color: currentColor; }
.call .note, .call .note b { font-family: var(--font-sans); font-size: 14px; line-height: 1.5; color: var(--text-3); margin: 0; }
.call .note { margin-top: 14px; }
.call-figure { margin: 0; min-width: 0; }
.call-figure figcaption { margin: 0 0 14px; }
.call-slogan { font-family: var(--font-serif) !important; font-size: 19px !important; line-height: 1.4 !important; margin: 0 0 6px !important; }
.call-desc { font-family: var(--font-sans) !important; font-size: 14.5px !important; line-height: 1.5 !important; color: var(--text-2) !important; margin: 0 !important; }
.call-figure svg.cfc-flow-svg { display: block; width: 100%; max-width: 372px; height: auto; margin: 4px auto 0; overflow: visible; }
.call .fl-link { fill: none; stroke: #8a7430; stroke-width: 1.4; marker-end: url(#cfc-arrow); }
.call .fl-loop { fill: none; stroke: #8a7430; stroke-width: 1.2; stroke-dasharray: 4 4; marker-end: url(#cfc-arrow); }
.call .fl-tag { font-family: var(--font-mono); font-size: 9.5px; letter-spacing: 0.12em; text-transform: uppercase; fill: #8a7430; }
.call .fl-node rect { fill: #fff; stroke: var(--line); stroke-width: 1; }
.call .fl-node circle { fill: #f6efd8; stroke: #cfae52; stroke-width: 1; }
.call .fl-n { font-family: var(--font-mono); font-size: 11.5px; font-weight: 700; fill: #8a6a12; }
.call .fl-h { font-family: var(--font-sans); font-size: 15px; font-weight: 500; letter-spacing: -0.01em; fill: var(--text); }
.call .fl-s { font-family: var(--font-sans); font-size: 11.5px; fill: var(--text-3); }
.call .fl-key rect { stroke: #cfae52; stroke-width: 1.4; }
.call .fl-pill rect { fill: var(--text); }
.call .fl-pill text { font-family: var(--font-sans); font-size: 12.5px; font-weight: 500; fill: #f2cc70; }
.call .fl-who rect { stroke-width: 1; }
.call .fl-who text { font-family: var(--font-mono); font-size: 8.5px; letter-spacing: 0.1em; text-transform: uppercase; }
.call .fl-who .fl-ico { fill: none; stroke-width: 1.1; stroke-linecap: round; }
.call .fl-who .fl-ico .fl-eye { stroke: none; }
.call .fl-joint rect { fill: #f6efd8; stroke: #cfae52; }
.call .fl-joint text { fill: #8a6a12; }
.call .fl-joint .fl-ico { stroke: #8a6a12; }
.call .fl-joint .fl-ico .fl-eye { fill: #8a6a12; }
.call .fl-agent rect { fill: #ecebe4; stroke: #d3d0c6; }
.call .fl-agent text { fill: #5f6470; }
.call .fl-agent .fl-ico { stroke: #5f6470; }
.call .fl-agent .fl-ico .fl-eye { fill: #5f6470; }
@media (max-width: 860px) { .call { grid-template-columns: 1fr; } }

/* the partner band, as before, on the ivory ground */
.longform .band-block { padding: 8px 0 0; }
.longform .center-head { margin-bottom: clamp(20px, 2.6vw, 32px); }
.longform .center-head .h-lg { font-family: var(--font-serif); font-weight: 400; font-size: clamp(36px, 4vw, 52px); line-height: 1.1; letter-spacing: -0.015em; margin: 0; }
.longform .partners-ack { font-family: var(--font-serif); font-size: 16px; line-height: 1.5; color: var(--text-2); }

/* ---------------- the question and the tree (dark, continues the hero) ---------------- */
.tree-band { background: #06090f; color: #fff; padding: clamp(28px, 4vw, 56px) 0 clamp(36px, 5vw, 72px); }
.tree-band .wrap-wide { max-width: 1380px; }
.tree-title { margin: 0 auto clamp(20px, 3vw, 40px); max-width: 30em; text-align: center; font-family: var(--font-serif); font-weight: 400; font-size: clamp(24px, 3vw, 40px); line-height: 1.25; letter-spacing: -0.01em; color: #fff; text-wrap: balance; }
.tree-note { margin: clamp(18px, 2.4vw, 32px) auto 0; max-width: 40em; text-align: center; font-family: var(--font-serif); font-size: clamp(16px, 1.5vw, 20px); line-height: 1.45; color: rgba(244, 245, 248, 0.86); text-wrap: balance; }
.tree-band .rtree-wrap { margin: 0; }
.tree-band .rtree { display: block; width: 100%; height: auto; }
.rtree-wrap:not(.in) .rtree * { animation-play-state: paused !important; }
html.static .rtree-wrap .rtree * { animation-play-state: running !important; }

/* ---------------- tabs + task panels ---------------- */
.task-frame { width: min(var(--wide), 100%); margin: 18px auto 0; border: 0; background: none; border-radius: 0; padding: 0; box-shadow: none; }
.task-tabs {
  display: flex; flex-wrap: wrap; justify-content: center; gap: 6px 28px;
  width: max-content; max-width: 100%; margin: 0 auto 22px; padding: 0;
  border: 0; border-radius: 0; background: none;
}
.task-frame .tt { font-family: var(--font-sans); font-size: 15px; font-weight: 600; letter-spacing: 0; color: var(--muted-2); background: none; border: 0; border-radius: 0; padding: 6px 0; cursor: pointer; white-space: nowrap; transition: color 0.2s ease; }
.task-frame .tt:hover { color: var(--text); border: 0; background: none; }
.task-frame .tt.on { color: var(--text); background: none; border: 0; }
.task-panel { display: none; }
.task-panel.on { display: block; }
.task-meta { display: flex; flex-wrap: wrap; justify-content: center; gap: 6px 18px; margin: 0 0 18px; font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--text-3); }
.task-meta span + span::before { content: "·"; margin-right: 18px; }
/* Keep compute labels aligned and outside the mobile body-copy font rule. */
#signature-frame .task-meta, #one-node-frame .task-meta { align-items: center; font-size: 12px; }
#signature-frame .task-meta span:last-child, #one-node-frame .task-meta > .task-resource { background: var(--text); color: #fff; padding: 5px 10px; white-space: nowrap; }
#signature-frame .task-meta span:last-child::before { content: none; }
.task-tags { display: flex; justify-content: center; gap: 8px; margin: 0 0 18px; }
.tag { font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--text-3); }
.tag + .tag::before { content: "·"; margin-right: 8px; }
.task-frame .task-media { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin: 0 0 18px; }
.task-frame .task-tags .tag { width: auto; height: auto; border: 0; background: none; padding: 0; }
.task-media.one { grid-template-columns: 1fr; max-width: 680px; margin-left: auto; margin-right: auto; }
.task-frame .task-fig {
  margin: 0; min-width: 0; position: static; overflow: visible;
  border: 1px solid var(--line); border-radius: 0; background: var(--bg);
  padding: 24px 24px 20px; display: flex; flex-direction: column; justify-content: center; gap: 14px;
}
.task-fig.wide { grid-column: 1 / -1; }
.task-frame .fig-body { min-width: 0; display: flex; flex-direction: column; align-items: center; justify-content: center; aspect-ratio: auto; padding: 0; }
.task-frame .fig-body > * { width: 100%; }
.task-frame .fig-body svg { display: block; width: 100%; height: auto; max-height: none; }
.task-frame .fig-body img { display: block; width: 100%; max-width: 100%; height: auto; border-radius: 0; }
.task-frame .fig-body.fig-table { overflow-x: auto; padding: 0; }
.task-frame .task-fig .fig-cap { display: block; padding: 0; border: 0; background: none; font-family: var(--font-sans); font-size: 14px; line-height: 1.5; letter-spacing: 0; text-transform: none; color: var(--text-3); text-align: center; text-wrap: pretty; }
.task-frame .task-fig .fig-cap b { font-weight: 500; color: var(--text); }
.task-frame .task-fig .fig-cap a { color: var(--text); text-decoration: underline; }
.chart-legend { display: inline-flex; flex-wrap: wrap; gap: 6px 12px; margin-left: 6px; }
.legend-item { display: inline-flex; align-items: center; gap: 6px; white-space: nowrap; }
.legend-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--text-3); }
.legend-solid { width: 16px; height: 2px; background: var(--blue); }
.chart-axis-note { display: block; margin-top: 6px; font-size: 12px; color: var(--text-3); }
.climb-switch { display: flex; flex-wrap: wrap; align-items: center; justify-content: flex-end; gap: 6px; margin: 16px 0 10px; font-family: var(--font-sans); font-size: 13px; }
.climb-switch > span { margin-right: 6px; color: var(--text-3); }
.climb-switch button { border: 1px solid var(--line); background: transparent; color: var(--text); padding: 7px 12px; font: inherit; cursor: pointer; }
.climb-switch button[aria-pressed="true"] { background: var(--text); border-color: var(--text); color: #fff; }
.climb-switch button:focus-visible { outline: 2px solid var(--blue); outline-offset: 3px; }
.climb-switch[hidden], .climb-view[hidden] { display: none; }
.climb-view .task-fig { margin-top: 0; }
.legend-baseline { width: 16px; height: 0; border-top: 1px dashed var(--text-2); }
.baseline-note { color: var(--text-3); }
.task-frame .task-soon { margin: clamp(48px, 6vw, 96px) auto; text-align: center; font-family: var(--font-serif); font-size: clamp(22px, 2.2vw, 28px); color: var(--text-3); }
.task-frame .task-card { width: min(var(--col), 100%); margin: 26px auto 0; border-top: 0; padding-top: 0; }
.task-frame .tc-label { font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--text-3); margin: 0 0 10px; }
.task-frame .task-card h3, .task-frame .task-card .h-md { font-family: var(--font-serif); font-size: 24px; font-weight: 500; line-height: 1.25; margin: 0 0 12px; }
.task-frame .tc-body, .task-frame .tc-target { margin: 0 0 14px; font-family: var(--font-serif); font-size: 17.5px; line-height: 1.55; color: var(--text); }
.task-frame .tc-body b, .task-frame .tc-target b { font-family: inherit; font-size: inherit; letter-spacing: 0; text-transform: none; margin: 0; font-weight: 600; }
.task-frame .tc-link { display: inline-block; margin: 8px 20px 0 0; font-family: var(--font-sans); font-size: 15px; font-weight: 600; letter-spacing: 0; color: var(--text); text-decoration: none; border-bottom: 1px solid rgba(20, 20, 19, 0.4); padding-bottom: 2px; }
.task-frame .tc-link:hover { border-color: currentColor; }
.task-frame .tc-runs { list-style: none; margin: 16px 0 6px; padding: 0; border-top: 1px solid var(--text); }
.task-frame .tc-runs li { display: grid; grid-template-columns: 22px 1fr auto; gap: 2px 12px; align-items: baseline; padding: 10px 0; border-bottom: 1px solid var(--line-2); }
.task-frame .tc-runs .rr-mk { font-size: 14px; text-align: left; }
.task-frame .tc-runs .rr-model { font-family: var(--font-sans); font-size: 15px; font-weight: 400; color: var(--text); }
.task-frame .tc-runs .rr-model i { display: block; font-style: normal; color: var(--text-3); font-size: 12.5px; font-family: var(--font-mono); margin-top: 2px; }
.task-frame .tc-runs .rr-best { font-family: var(--font-mono); font-size: 18px; font-weight: 500; color: var(--text); text-align: right; }
.task-frame .tc-runs .rr-meta { grid-column: 2 / -1; font-family: var(--font-mono); font-size: 12px; letter-spacing: 0; color: var(--text-3); }
.run-readout { display: flex; flex-direction: column; justify-content: center; gap: 10px; padding: 4px 6px; }
.run-readout .rr-k { margin: 0; font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--text-3); }
.rr-row { display: flex; justify-content: space-between; gap: 12px; padding: 8px 0; border-bottom: 1px solid var(--line); font-size: 14px; }
.rr-row b { font-family: var(--font-mono); font-weight: 500; }
.rr-none { color: var(--text-3); font-weight: 400; }
.rr-note { margin: 0; font-size: 13px; color: var(--text-3); }

/* tables */
table.ladder, table.tbl, table.data, table.runs, table.subs {
  width: 100%; border-collapse: collapse; font-family: var(--font-sans); font-size: 14px; color: var(--text);
}
table.ladder th, table.tbl th, table.data th, table.runs th, table.subs th {
  font-weight: 600; text-align: left; color: var(--text); letter-spacing: 0; text-transform: none; font-size: 14px;
  padding: 10px 12px; border-bottom: 1px solid var(--text); box-shadow: inset 0 2px 0 var(--sage-ink); white-space: nowrap;
}
table.ladder td, table.tbl td, table.data td, table.runs td, table.subs td { padding: 10px 12px; border-bottom: 1px solid var(--text); vertical-align: top; }
table.ladder { font-size: 13.5px; }
table.ladder th, table.ladder td { padding: 8px 8px; white-space: nowrap; }
table.ladder th:first-child, table.ladder td:first-child { padding-left: 0; }
table.ladder th:last-child, table.ladder td:last-child { padding-right: 0; }
table .r, table th.r, table td.r { text-align: right; font-variant-numeric: tabular-nums; }
table.ladder td.rung { font-weight: 600; color: var(--text) !important; }
table td.rung { color: var(--text); }
.table-scroll, .scroll { overflow-x: auto; }

/* ---------------- the trajectory figures ---------------- */
.traj { display: block; width: 100%; height: auto; font-family: var(--font-mono); }
.traj .gl { stroke: var(--line-2); stroke-width: 1; }
.traj .ax { stroke: #cfcbc1; stroke-width: 1; }
.traj .tk { fill: var(--text-3); font-size: 10px; letter-spacing: 0.08em; }
.traj .axlbl { fill: var(--text-3); font-size: 10px; letter-spacing: 0.14em; text-transform: uppercase; }
.traj .run { fill: var(--text-2); font-size: 10.5px; letter-spacing: 0.12em; text-transform: uppercase; }
.traj .base { stroke: var(--text); stroke-width: 1.2; stroke-dasharray: 5 4; opacity: 0; }
.traj .best-line { fill: none; stroke: var(--blue); stroke-width: 2; stroke-linejoin: round; stroke-linecap: round; }
.traj .stem { stroke: #c9c5ba; stroke-width: 1.4; transform-origin: center bottom; }
.traj .stem.dead { stroke: #e6e3da; }
.traj .dot { fill: var(--text-2); }
.traj .peak { fill: var(--blue); }
.traj .halo { fill: var(--blue); opacity: 0.14; }
.traj .zero line { stroke: #c9c5ba; stroke-width: 1.3; stroke-linecap: round; }
.traj .baselbl { fill: var(--text); font-size: 10px; letter-spacing: 0.1em; opacity: 0; paint-order: stroke; stroke: var(--panel); stroke-width: 3.2px; stroke-linejoin: round; }
.traj .axis-break { fill: none; stroke: #8b877c; stroke-width: 1.4; stroke-linecap: round; }
.traj .peaklbl { fill: var(--accent-deep); font-size: 11.5px; font-weight: 700; letter-spacing: 0.02em; paint-order: stroke; stroke: var(--panel); stroke-width: 3.6px; stroke-linejoin: round; }
.traj[data-x-axis="time"] .peaklbl { opacity: 0; }
.traj.sig .tk, .traj.sig .peaklbl { font-size: 10.5px; }
.traj.multi .base { stroke: #8b877c; stroke-dasharray: 5 4; }
.traj.evo .lbl { font-size: 10.5px; letter-spacing: 0.04em; }
.traj.evo .note { font-size: 9.5px; letter-spacing: 0.02em; fill: var(--text-3); }
.traj.evo .glyph { font-weight: 700; }
.traj.evo .bar { transform-box: fill-box; transform-origin: left center; }
.traj.evo .head { stroke: var(--blue); stroke-width: 1.2; opacity: 0; }
.traj.best .note { font-size: 9.5px; fill: var(--text-3); }
.traj.best .glyph { font-weight: 700; }
.traj.ref, .traj.ref text { font-family: var(--font-sans); }
.traj.ref .ttl { font-size: 18px; font-weight: 600; fill: var(--text); letter-spacing: -0.01em; }
.traj.ref .sub { font-size: 11.5px; fill: var(--text-3); }
.traj.ref .tk { font-size: 11px; fill: var(--text-3); letter-spacing: 0; }
.traj.ref .axl { font-size: 12px; fill: var(--text-2); }
.traj.ref .gl { stroke: var(--line-2); }
.traj.ref .ax { stroke: #cfcbc1; }
.traj.ref .ann { font-size: 11.5px; fill: var(--text); letter-spacing: 0; }
.traj.ref .lead { stroke: var(--text-2); stroke-width: 0.9; }
.traj.ref .lg { font-size: 12px; fill: var(--text); }
.traj.ref .lgbox { fill: var(--panel); stroke: var(--line); stroke-width: 1; }
.traj .mk, .traj .peak, .traj .halo, .traj .dot { transform-box: fill-box; transform-origin: center; }
.task-panel.on .traj .base,
.task-panel.on .traj .baselbl { animation: tr-fade 0.7s ease-out 0.15s forwards; }
.task-panel.on .traj .stem { animation: tr-grow 0.5s var(--ease) var(--d) both; }
.task-panel.on .traj .mk { animation: tr-pop 0.45s var(--ease) var(--d) both; }
.task-panel.on .traj .peaklbl { animation: tr-fade 0.5s ease-out calc(var(--d) + 0.18s) both; }
.task-panel.on .traj .best-line { stroke-dasharray: 1600; stroke-dashoffset: 1600; animation: tr-draw 2.9s cubic-bezier(0.4, 0, 0.2, 1) 0.55s forwards; }
.task-panel.on .traj.evo .lbl,
.task-panel.on .traj.evo .note { opacity: 0; animation: tr-fade 0.4s ease-out var(--d) forwards; }
.task-panel.on .traj.evo .bar { animation: tr-growx 0.6s var(--ease) var(--d) both; }
.task-panel.on .traj.evo .head { animation: tr-sweep 5.7s linear 0.3s forwards; }
.task-panel.on .traj.ref .lead { opacity: 0; animation: tr-fade 0.4s ease-out var(--d) forwards; }
@keyframes tr-fade { to { opacity: 1; } }
@keyframes tr-grow { from { transform: scaleY(0); opacity: 0; } to { transform: scaleY(1); opacity: 1; } }
@keyframes tr-pop { from { opacity: 0; transform: scale(0.4); } to { opacity: 1; transform: scale(1); } }
@keyframes tr-draw { to { stroke-dashoffset: 0; } }
@keyframes tr-growx { from { transform: scaleX(0); } to { transform: scaleX(1); } }
@keyframes tr-sweep { 0% { opacity: 0.9; transform: translateX(0); } 98% { opacity: 0.9; } 100% { opacity: 0; transform: translateX(var(--sweep, 880px)); } }
html.static .traj *, html.shot .traj * { animation: none !important; opacity: 1 !important; stroke-dashoffset: 0 !important; }
html.static .traj .stem, html.static .traj .mk, html.static .traj .dot, html.static .traj .peak, html.static .traj .halo, html.static .traj .bar,
html.shot .traj .stem, html.shot .traj .mk, html.shot .traj .dot, html.shot .traj .peak, html.shot .traj .halo, html.shot .traj .bar { transform: none !important; }

/* ---------------- footer ---------------- */
footer.site { margin-top: 72px; border-top: 1px solid var(--line); padding: 48px var(--gutter) 32px; }
.footer-inner { max-width: var(--max); margin: 0 auto; display: grid; grid-template-columns: 1.6fr 1fr 1fr; gap: 32px; }
.footer-cols { display: contents; }
.footer-brand .wm { font-family: var(--font-serif); font-size: 20px; }
.footer-brand .dex { color: var(--text-2); }
.footer-line { margin: 10px 0 0; font-size: 14px; color: var(--text-3); max-width: 34em; }
footer.site h4 { margin: 0 0 10px; font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase; font-weight: 500; color: var(--text-3); }
footer.site ul { list-style: none; margin: 0; padding: 0; }
footer.site li { margin: 6px 0; font-size: 14px; }
footer.site a { color: var(--text-2); text-decoration: none; }
footer.site a:hover { color: var(--text); }
.footer-base { max-width: var(--max); margin: 32px auto 0; padding-top: 16px; border-top: 1px solid var(--line-2); display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px 24px; font-family: var(--font-mono); font-size: 12px; color: var(--text-3); }

/* ---------------- inner pages: the legacy sheet, re-tinted ---------------- */
body:not(.home) { padding-top: 64px; }
.nav { border-bottom: 0; background: transparent; }
.nav.scrolled { background: rgba(250, 249, 245, 0.85); }
.nav.over-dark.scrolled { background: rgba(0, 0, 0, 0.35); }
.pagehead h1, .pagehead .h-lg, .pagehead .vibe-tag, .pagehead .lede { text-shadow: none !important; filter: none !important; }
section.block h2 em, .h-lg em, .h-md em, section.block h1 em { color: inherit !important; -webkit-text-fill-color: inherit !important; background: none !important; }
.nav-inner { height: 64px; justify-content: flex-start; }
.brand { font-family: var(--font-sans); }
.nav .nav-links { font-family: var(--font-sans); font-size: 14px; letter-spacing: 0; text-transform: none; gap: 4px; }
.nav .nav-links a { background: none; padding: 8px 12px; color: inherit; }
.nav .nav-links a.ext::after { content: none; }
.ph-frame, .field-scrim, .benchmark-wash, .ground-rise, .hero-field::after, .pagehead::after, .vibe-rule { display: none !important; }
.eyebrow::before, .section-head .eyebrow::before { display: none; }
.eyebrow { padding-left: 0; }
section.block, section.block.tinted, section.block::before, section.block + section.block::before, .lb, .pagehead, .hero-field { background: transparent !important; box-shadow: none; }
section.block + section.block::before { display: none; }
section.block + section.block { border-top: 1px solid var(--line-2); }
.pagehead { position: relative; padding: clamp(48px, 7vw, 96px) 0 clamp(24px, 3vw, 48px); }
.pagehead h1, .pagehead .h-lg { font-family: var(--font-serif); font-weight: 400; font-size: clamp(36px, 4.2vw, 56px); line-height: 1.1; letter-spacing: -0.015em; margin: 0 0 18px; color: var(--text) !important; text-wrap: balance; max-width: 18ch; }
.pagehead h1.vibe-h1 em { color: var(--text); }
.pagehead .lede, .pagehead p { font-family: var(--font-serif); font-size: clamp(18px, 1.5vw, 21px); line-height: 1.45; color: var(--text-2) !important; max-width: 36em; margin: 0; }
.pagehead .eyebrow, .pagehead p.eyebrow { font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.14em; color: var(--text-3) !important; max-width: none; }
.pagehead .eyebrow a { color: var(--text-3); }
.vibe-tag, .joy-line { background: none !important; -webkit-text-fill-color: inherit !important; color: var(--text-2) !important; font-weight: 400; font-family: var(--font-serif); }
.joy-chips { display: flex; flex-wrap: wrap; gap: 6px 20px; margin: 10px 0 22px; font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--text-3); }
.joy-chips .jc { background: none; border: 0; padding: 0; border-radius: 0; color: inherit; box-shadow: none; }
.filterbar, .lb-filter { display: inline-flex; flex-wrap: wrap; gap: 4px; padding: 4px; margin-bottom: 26px; border: 1px solid var(--line); border-radius: 999px; background: var(--panel); }
.filterbar .chip, .lb-filter .chip { font-family: var(--font-sans); font-size: 14px; padding: 8px 16px; border: 0; border-radius: 999px; background: none; color: var(--text-2); cursor: pointer; }
.filterbar .chip:hover, .lb-filter .chip:hover { color: var(--text); border: 0; }
.filterbar .chip.active, .lb-filter .chip.active { background: var(--text); color: #fff; border: 0; }
.tcard { background: var(--panel); border-radius: 16px; }
.tcard:hover { transform: none; border-color: var(--text-3); }
.tcard.sig, .tcard.sig:hover { border-top: 1px solid var(--line); }
.tcard .sigtag { color: var(--text-2); font-weight: 500; }
section.block h2, .h-lg, .h-md { font-family: var(--font-serif); font-weight: 400; letter-spacing: -0.01em; }
section.block h2 em, .h-lg em { color: var(--text); font-style: italic; }
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 var(--gutter); }

/* boxes on the inner pages: square, ruled in ink, on the page ground */
.tcard, .scorebox, .article .fig-frame, .article .task-fig, .task-fig, .agent-note, .run-figs figure, .lb .tcard, .post-card, .post-list article {
  border-radius: 0 !important; border-color: var(--text) !important; background: var(--bg) !important; box-shadow: none !important;
}
.tcard:hover { transform: none; border-color: var(--text); }
.article .fig-frame.fig-dark { background: var(--field) !important; }
.filterbar, .lb-filter { border: 0 !important; padding: 0; gap: 6px 28px; background: none !important; border-radius: 0; }
.filterbar .chip, .lb-filter .chip { font-family: var(--font-sans); font-size: 15px; font-weight: 600; padding: 6px 0; border: 0; border-radius: 0; background: none; color: var(--muted-2); }
.filterbar .chip:hover, .lb-filter .chip:hover { color: var(--text); border: 0; }
.filterbar .chip.active, .lb-filter .chip.active { background: none; color: var(--text); border: 0; }
.tag, .chip, .pill, .article .tag { border-radius: 0; }

/* the announcement post and task pages read like the home column */
article.article { max-width: 760px; margin-left: auto; margin-right: auto; }
.article h1 { font-family: var(--font-serif); font-weight: 400; font-size: clamp(36px, 4.2vw, 52px); line-height: 1.1; letter-spacing: -0.015em; }
.article h2 { font-family: var(--font-serif); font-weight: 400; font-size: clamp(26px, 2.6vw, 32px); line-height: 1.2; letter-spacing: -0.01em; }
.article h3 { font-family: var(--font-serif); font-weight: 500; }
.article > p, .article .lede, .article > ul > li, .article > ol > li, .article section > p, .article section > ul > li { font-family: var(--font-serif); font-size: 17.5px; line-height: 1.55; color: var(--text); }
.article .lede { border-left: 3px solid var(--text); font-size: clamp(20px, 2vw, 24px); line-height: 1.35; }
.article .tag, .article .chip, .article .pill { background: none; border: 1px solid var(--line); color: var(--text-3); }
.step-item::before { background: var(--text) !important; color: #fff !important; border-radius: 0 !important; box-shadow: none !important; }
.step-item::after { background: var(--line) !important; }
.step-item h3 { font-family: var(--font-serif); font-weight: 500; font-size: 21px; }
.step-item h3::before { display: none !important; }

/* ---------------- responsive ---------------- */
@media (max-width: 960px) {
  .task-frame .task-media { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
}
@media (max-width: 720px) {
  body { font-size: 16px; }
  .nav-toggle { display: inline-flex; margin-left: auto; background: none; border: 1px solid currentColor; border-radius: 999px; padding: 6px 12px; font-size: 13px; color: inherit; cursor: pointer; opacity: 0.8; }
  .nav-links { display: none; position: fixed; top: 64px; left: 0; right: 0; flex-direction: column; gap: 2px; padding: 10px 16px 18px; background: rgba(243, 241, 234, 0.96); color: var(--text); border-bottom: 1px solid var(--line); }
  .nav.over-dark .nav-links { background: rgba(6, 9, 15, 0.94); color: #fff; }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 12px 8px; font-size: 16px; }
  .hero { padding-top: 64px; }
  .hero-labels { top: 38%; }
  .hero h1 { font-size: clamp(40px, 11vw, 56px); line-height: 1.05; }
  .hero-foot { gap: 16px; }
  .toc { font-size: 15px; }
  .replay { bottom: 14px; right: 14px; }
  .sec { padding-top: 56px; }
  .sec.lead h2 { font-size: 32px; }
  .sec p { font-size: 17.5px; }
  .task-tabs { width: 100%; justify-content: flex-start; flex-wrap: nowrap; overflow-x: auto; scrollbar-width: none; border-radius: 16px; }
  .task-tabs::-webkit-scrollbar { display: none; }
  .task-fig { padding: 16px 14px 14px; border-radius: 14px; }
  .qs li { font-size: 18px; }
  .sec .thesis-grid { grid-template-columns: 1fr; }
  .sec .thesis-head { position: static; }
  .chain-row { grid-template-columns: 1fr; gap: 6px; }
  .chain-arrow { transform: rotate(90deg); }
  /* the research tree is drawn at a legible size and scrolls sideways */
  body.home.skypage .tree-band .rtree-wrap {
    overflow-x: auto; -webkit-overflow-scrolling: touch; scrollbar-width: thin;
    -webkit-mask-image: linear-gradient(90deg, #000 88%, rgba(0, 0, 0, 0.25) 100%);
            mask-image: linear-gradient(90deg, #000 88%, rgba(0, 0, 0, 0.25) 100%);
  }
  body.home.skypage .tree-band .rtree { width: 1020px; max-width: none; }
  body.home.skypage .tree-band { padding-bottom: clamp(24px, 4vw, 40px); }
}

/* ---------------- motion preferences ---------------- */
@media (prefers-reduced-motion: reduce) {
  .hl .ch, .hero-foot > *, .hero-labels .hero-kicker, .hero .sky { animation: none !important; opacity: 1 !important; transform: none !important; filter: none !important; }
  .traj * { animation: none !important; opacity: 1 !important; stroke-dashoffset: 0 !important; }
  .traj .stem, .traj .mk, .traj .dot, .traj .peak, .traj .halo, .traj .bar { transform: none !important; }
}
html.static .hl .ch, html.static .hero-foot > *, html.static .hero-labels .hero-kicker, html.static .hero .sky { animation: none !important; opacity: 1 !important; transform: none !important; filter: none !important; }

/* =====================================================================
   the two calls, the way the task cards went: no card, no border, no
   shadow. The title sits large and centred, the copy is set in the
   article's serif on the ivory ground, and the flow figure keeps a
   soft panel like any other figure on the page.
   ===================================================================== */
#contribute.block, #compute.block {
  margin-left: calc(50% - 50vw); margin-right: calc(50% - 50vw);
  padding: clamp(64px, 8vw, 112px) calc(50vw - 50%) clamp(56px, 7vw, 96px);
}
#contribute.block { background: linear-gradient(180deg, #f4f1ea 0%, #ece8dd 100%) !important; }
#compute.block { background: linear-gradient(180deg, #e6eaf1 0%, #dde3ec 100%) !important; }
.longform #contribute.block + #compute.block::before { display: none; }
#contribute .wrap.wrap-wide, #compute .wrap.wrap-wide { max-width: none; width: min(var(--wide), 100%); padding: 0; }

/* the thesis (introduction + design principle) on the same parchment band as the contributors;
   the task samples and the partnership stay on the page ground between them */
#intro.sec, #principles.sec {
  margin-left: calc(50% - 50vw); margin-right: calc(50% - 50vw);
  padding-left: calc(50vw - 50%); padding-right: calc(50vw - 50%);
}
#intro.sec { background: linear-gradient(180deg, #f4f1ea 0%, #f0ece3 100%); padding-bottom: clamp(16px, 2vw, 28px); }
#principles.sec { background: linear-gradient(180deg, #f0ece3 0%, #ece8dd 100%); padding-top: clamp(40px, 5vw, 72px); padding-bottom: clamp(64px, 8vw, 112px); }
/* the lightweight samples on the same band, between the signature samples and the partnership on the page ground */
#lightweight.sec {
  margin-left: calc(50% - 50vw); margin-right: calc(50% - 50vw);
  padding-left: calc(50vw - 50%); padding-right: calc(50vw - 50%);
  padding-bottom: clamp(64px, 8vw, 112px);
  background: linear-gradient(180deg, #f4f1ea 0%, #ece8dd 100%);
}

/* ---- Call for Contributors ---- */
#contribute .cfc-title {
  display: block; max-width: 22ch; margin: 0 auto clamp(28px, 3.5vw, 48px); text-align: center;
  font-family: var(--font-serif); font-weight: 400; font-size: clamp(36px, 4vw, 52px); line-height: 1.1; letter-spacing: -0.015em;
  color: var(--text); text-wrap: balance;
}
#contribute .cfc-shell {
  --bg: #faf9f5; --text: #191917; --muted: #4a4a45; --line: #dcd8ce; --panel: #faf9f5; --gold: #8a6a12; --gold-light: #8a6a12; --gold-border: transparent; --blue: #3b7cf0;
  min-height: 0; width: min(var(--wide), 100%); margin: 0 auto; padding: 0;
  grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr); gap: clamp(28px, 4vw, 64px); align-items: center;
  border: 0; border-radius: 0; background: none; box-shadow: none; color: var(--text);
}
#contribute .cfc-left { justify-content: flex-start; }
#contribute .cfc-questions { margin-top: 0; border-top: 1px solid var(--text); }
#contribute .cfc-question { min-height: 0; grid-template-columns: minmax(0, 1fr) 16px; gap: 16px; padding: 18px 0; border-bottom: 1px solid var(--line); }
#contribute .cfc-question-icon { display: none; }
#contribute .cfc-question-icon { width: 36px; height: 36px; color: var(--text-2); border: 1px solid var(--line); background: var(--panel); }
#contribute .cfc-question-icon svg { width: 18px !important; height: 18px !important; max-width: 18px !important; max-height: 18px !important; }
#contribute .cfc-question p { font-family: var(--font-serif); font-size: 21px; line-height: 1.35; letter-spacing: 0; color: var(--text); text-wrap: pretty; }
#contribute .cfc-question strong { color: var(--text); font-weight: 600; }
#contribute .cfc-chevron { color: var(--text-3); font-size: 22px; font-weight: 300; }
#contribute .cfc-hour { margin-top: 26px; min-height: 0; }
#contribute .cfc-hour-number { gap: 8px; }
#contribute .cfc-hour-number .num { font-family: var(--font-serif); font-weight: 400; font-size: clamp(26px, 2.4vw, 32px); line-height: 1; letter-spacing: -0.01em; color: var(--text); }
#contribute .cfc-hour-number .unit { font-family: var(--font-serif); font-style: normal; font-size: clamp(26px, 2.4vw, 32px); line-height: 1; color: var(--text-2); }
#contribute .cfc-hour-divider { height: 36px; margin: 0 22px; background: var(--line); }
#contribute .cfc-hour-copy { font-family: var(--font-serif); font-size: 21px; line-height: 1.4; font-weight: 400; color: var(--text); }
#contribute .cfc-hour-copy .cfc-brand-word { font-style: normal; color: var(--text); }
#contribute .cfc-buttons { margin-top: 28px; }
#contribute .cfc-btn { min-height: 0; padding: 12px 18px; gap: 8px; border-radius: 8px; font-family: var(--font-sans); font-size: 15px; font-weight: 500; transition: background 0.2s ease; }
#contribute .cfc-btn:hover { transform: none; }
#contribute .cfc-btn-primary { color: #fff; border: 0; background: var(--text); box-shadow: none; }
#contribute .cfc-btn-primary:hover { background: #000; }
#contribute .cfc-contact { margin: 18px 0 0; font-family: var(--font-sans); font-size: 14px; line-height: 1.7; color: var(--text-3); }
#contribute .cfc-contact a { font-family: var(--font-mono); font-size: 13px; color: var(--text); border-bottom: 1px solid rgba(25, 25, 23, 0.3); }
#contribute .cfc-contact a:hover { color: var(--text); border-bottom-color: currentColor; }

/* the flow figure: a tinted plate, one ink spine, four numbered stations, one sage highlight */
#contribute .cfc-flow {
  --hl: #d7e3fa; --hl-2: #e8eefb;
  padding: 30px 26px 22px; border: 1px solid var(--text); border-radius: 0; background: var(--panel); box-shadow: none;
}
#contribute .cfc-flow-head { margin: 0 0 26px; }
#contribute .cfc-flow-slogan { font-family: var(--font-serif); font-size: clamp(22px, 2vw, 26px); font-weight: 400; line-height: 1.3; letter-spacing: -0.01em; color: var(--text); text-wrap: pretty; max-width: 26ch; }
#contribute .cfc-flow-slogan .cfc-brand-word { font-style: normal; color: var(--text); }
#contribute .cfc-flow-desc { margin: 12px 0 0; font-family: var(--font-serif); font-size: 17px; line-height: 1.55; color: var(--text-2); max-width: 52ch; }
#contribute .cfc-flow-svg { max-width: 470px; margin: 0 auto; font-family: var(--font-sans); overflow: visible; }
#contribute .fl-spine { stroke: var(--text); stroke-width: 1; stroke-opacity: 0.55; stroke-dasharray: 440; stroke-dashoffset: 440; }
#contribute .fl-step-arrow { fill: none; stroke: none; marker-end: url(#cfc-arrow); }
#contribute .fl-loop { fill: none; stroke: var(--text-3); stroke-width: 1; stroke-dasharray: 3 3; marker-end: url(#cfc-arrow-soft); }
#contribute .fl-tag { font-family: var(--font-mono); font-size: 9.5px; letter-spacing: 0.14em; text-transform: uppercase; fill: var(--text-3); }
#contribute .fl-node circle { fill: #fff; stroke: var(--text); stroke-width: 1; }
#contribute .fl-n { font-family: var(--font-serif); font-size: 18px; font-weight: 500; fill: var(--text); }
#contribute .fl-h { font-family: var(--font-sans); font-size: 15px; font-weight: 500; letter-spacing: -0.01em; fill: var(--text); }
#contribute .fl-s { font-family: var(--font-sans); font-size: 11.5px; fill: var(--text-3); }
#contribute .fl-key circle { fill: var(--hl); }
#contribute .fl-who rect { stroke-width: 1; }
#contribute .fl-who text { font-family: var(--font-mono); font-size: 8.5px; letter-spacing: 0.12em; text-transform: uppercase; }
#contribute .fl-joint rect { fill: var(--hl-2); stroke: rgba(25, 25, 23, 0.45); }
#contribute .fl-joint text { fill: var(--text); }
#contribute .fl-agent rect { fill: #fff; stroke: rgba(25, 25, 23, 0.25); }
#contribute .fl-agent text { fill: var(--text-2); }
#contribute .fl-pill rect { fill: var(--hl); stroke: var(--text); stroke-width: 1; }
#contribute .fl-pill text { font-family: var(--font-serif); font-size: 16.5px; font-weight: 500; fill: var(--text); }
#contribute .cfc-flow-note { margin: 18px 0 0; padding-top: 14px; border-top: 1px solid var(--line); font-family: var(--font-sans); font-size: 13px; line-height: 1.55; color: var(--text-3); text-align: center; text-wrap: pretty; }
/* the figure draws itself the first time it is seen: the spine first, then the stations in order */
#contribute .cfc-flow .fl-node, #contribute .cfc-flow .fl-pill { opacity: 0; transform: translateY(6px); }
#contribute .cfc-flow .fl-loop, #contribute .cfc-flow .fl-tag, #contribute .cfc-flow .fl-step-arrow { opacity: 0; }
#contribute .cfc-flow.in .fl-spine { animation: fl-draw 1.1s var(--ease) forwards; }
#contribute .cfc-flow.in .fl-node, #contribute .cfc-flow.in .fl-pill { animation: fade-up 0.6s var(--ease) forwards; animation-delay: calc(0.25s + 0.18s * var(--i, 0)); }
#contribute .cfc-flow.in .fl-loop, #contribute .cfc-flow.in .fl-tag, #contribute .cfc-flow.in .fl-step-arrow { animation: fl-fade 0.5s ease forwards 1.1s; }
@keyframes fl-draw { to { stroke-dashoffset: 0; } }
@keyframes fl-fade { to { opacity: 1; } }
@media (prefers-reduced-motion: reduce) {
  #contribute .cfc-flow .fl-node, #contribute .cfc-flow .fl-pill, #contribute .cfc-flow .fl-loop, #contribute .cfc-flow .fl-tag, #contribute .cfc-flow .fl-step-arrow { opacity: 1; transform: none; animation: none; }
  #contribute .cfc-flow .fl-spine { stroke-dashoffset: 0; animation: none; }
}
html.static #contribute .cfc-flow .fl-node, html.static #contribute .cfc-flow .fl-pill, html.static #contribute .cfc-flow .fl-loop, html.static #contribute .cfc-flow .fl-tag, html.static #contribute .cfc-flow .fl-step-arrow { opacity: 1; transform: none; animation: none; }
html.static #contribute .cfc-flow .fl-spine { stroke-dashoffset: 0; animation: none; }

/* ---- Call for compute ---- */
#compute .center-head { margin-bottom: clamp(24px, 3vw, 40px); }
#compute .center-head .h-lg { max-width: 22ch; margin: 0 auto; text-align: center; color: var(--text); }
#compute .pcard.light.solo { width: min(760px, 100%); margin: 0 auto; padding: clamp(32px, 4vw, 52px) clamp(24px, 4vw, 56px); border: 1px solid var(--text); border-radius: 0 !important; background: var(--panel); box-shadow: none; }
#compute .pcard.solo .solo-main { gap: 12px; }
#compute .pcard .pc-wordmark { font-family: var(--font-serif); font-weight: 400; font-size: clamp(30px, 3vw, 38px); line-height: 1.15; letter-spacing: -0.01em; color: var(--text); margin: 0 0 4px; }
#compute .pcard.light.solo .pc-wordmark em { font-style: italic; color: var(--text); background: none; -webkit-text-fill-color: inherit; }
#compute .pcard.solo p { max-width: none; margin: 0; font-family: var(--font-serif); font-size: 18px; line-height: 1.55; color: var(--text); text-wrap: pretty; }
#compute .solo-contact { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px 20px; margin-top: 14px; }
#compute .solo-contact a { padding: 0 0 1px; border: 0; border-bottom: 1px solid rgba(25, 25, 23, 0.3); border-radius: 0; background: none; font-family: var(--font-mono); font-size: 13px; color: var(--text); text-decoration: none; }
#compute .solo-contact a:hover { border-bottom-color: currentColor; background: none; }

/* Phones: style.css gives a non-wide chart a fixed 480px width so its labels stay
   readable and the figure swipes sideways. This column flexbox centres its child, so
   the overflow lands on BOTH edges and the left half can never be scrolled to. Start
   the chart at the left edge instead, and let the caption keep the full width. */
@media (max-width: 560px) {
  .task-frame .task-fig:not(.wide) .fig-body:has(> svg) { align-items: flex-start; }
}

@media (max-width: 860px) {
  #contribute .cfc-shell { grid-template-columns: 1fr; gap: 32px; padding: 0; }
  #contribute .cfc-question { grid-template-columns: minmax(0, 1fr) 14px; gap: 12px; padding: 14px 0; }
  #contribute .cfc-question p { font-size: 18px; }
  #contribute .cfc-hour { align-items: center; }
  #contribute .cfc-hour-number .num, #contribute .cfc-hour-number .unit { font-size: 24px; }
  #contribute .cfc-hour-divider { height: 30px; margin: 0 16px; }
  #contribute .cfc-hour-copy { font-size: 18px; }
  #contribute .cfc-flow { padding: 18px 16px 16px; border-radius: 0; }
}

/* ---------------- the home below the hero and the tree: the sky pages' column ----------------
   The hero keeps its own inline sky; the fixed field (assets/sky-pages.js) runs behind the
   rest, and everything after the tree sits in the same dim-paper column the other pages use. */
body.home.skypage { --wide: var(--max); }
body.home.skypage .sky-rest { position: relative; z-index: 1; }
body.home.skypage .sky-rest .sky-ground { top: 0; }
body.home.skypage .sky-rest > :not(.sky-ground) { position: relative; z-index: 1; }
body.home.skypage .longform { padding-top: var(--fade); }
body.home.skypage .tree-band { position: relative; z-index: 1; }
body.home.skypage footer.site { background: transparent; }
body.home.skypage .longform, body.home.skypage .sec, body.home.skypage section.block,
body.home.skypage #contribute, body.home.skypage #compute, body.home.skypage .band-block { background: transparent !important; }
/* the compute call: black card, white type */
body.home.skypage #compute .pcard.light.solo { background: #06090f !important; border-color: #06090f !important; color: #fff; }
body.home.skypage #compute .pcard .pc-wordmark, body.home.skypage #compute .pcard.light.solo .pc-wordmark em { color: #fff; }
body.home.skypage #compute .pcard.solo p { color: rgba(255, 255, 255, 0.85); }
body.home.skypage #compute .solo-contact a { color: #fff; border-bottom-color: rgba(255, 255, 255, 0.4); }
body.home.skypage #compute .solo-contact a:hover { border-bottom-color: #fff; }
body.home.skypage .sec::before, body.home.skypage .sec::after, body.home.skypage section.block::before, body.home.skypage section.block::after { display: none; }

/* the research tree floats on the sky itself: no slab under it, a shadow from the hero's
   hills fading upward into the field, the branches lit a little like the trails */
body.home.skypage .tree-band { background: transparent; padding: clamp(24px, 3vw, 44px) 0 clamp(40px, 5vw, 72px); }
body.home.skypage .tree-band::before { content: ""; position: absolute; left: 0; right: 0; top: 0; height: 42%; z-index: 0; pointer-events: none; background: linear-gradient(180deg, #020306 0%, rgba(2, 3, 6, 0.6) 40%, rgba(2, 3, 6, 0) 100%); }
body.home.skypage .tree-band > .wrap { position: relative; z-index: 1; }
body.home.skypage .tree-band .wrap-wide { max-width: 1240px; }
body.home.skypage .tree-title { text-shadow: 0 0 28px rgba(0, 0, 0, 0.9), 0 0 10px rgba(0, 0, 0, 0.7); }
body.home.skypage .tree-note { text-shadow: 0 0 20px rgba(0, 0, 0, 0.9), 0 0 8px rgba(0, 0, 0, 0.7); }
.tree-title em.gold { font-style: normal; color: #f2cc70; }
body.home.skypage .tree-band .rtree-wrap { margin: 0 auto; }
body.home.skypage .tree-band .rt-edge { filter: drop-shadow(0 0 5px rgba(255, 255, 255, 0.22)); }
body.home.skypage .tree-band .rt-edge.more, body.home.skypage .tree-band .rt-more { opacity: 0.6; }
body.home.skypage .tree-band .rt-node, body.home.skypage .tree-band .rt-leaf, body.home.skypage .tree-band .rt-ring { filter: drop-shadow(0 0 6px rgba(255, 255, 255, 0.22)); }
body.home.skypage .tree-band .rt-name, body.home.skypage .tree-band .rt-leafname, body.home.skypage .tree-band .rt-root { text-shadow: 0 0 10px rgba(0, 0, 0, 0.8); }
body.home.skypage .tree-band .rtree text { font-family: var(--font-sans); }
body.home.skypage .tree-band .rt-root { font-family: var(--font-serif); font-size: 31px; font-weight: 500; letter-spacing: -0.01em; fill: #fff; }
body.home.skypage .tree-band .rt-name { font-size: 26px; font-weight: 500; fill: #fff; }
body.home.skypage .tree-band .rt-leafname { font-size: 22px; font-weight: 500; fill: #fff; }
body.home.skypage .tree-band .rt-sub { font-family: var(--font-mono); font-size: 13.5px; letter-spacing: 0.03em; fill: rgba(244, 245, 248, 0.9); }
body.home.skypage .tree-band .rt-budget { font-family: var(--font-mono); font-size: 14px; letter-spacing: 0.06em; font-weight: 500; fill: #fff; }
body.home.skypage .tree-band .rt-budget.big { font-size: 17px; letter-spacing: 0.05em; font-weight: 600; }
body.home.skypage .tree-band .rt-col { font-family: var(--font-mono); font-size: 13px; fill: rgba(244, 245, 248, 0.85); }
body.home.skypage .tree-band .rt-edge { stroke-width: 1.4; stroke-opacity: 0.95; filter: drop-shadow(0 0 4px rgba(255, 255, 255, 0.2)); }
body.home.skypage .tree-band .rt-edge.stem { stroke: #b9c9e6; stroke-opacity: 0.6; }
body.home.skypage .tree-band .rt-edge.more { stroke: #b9c9e6; stroke-opacity: 0.45; stroke-width: 1.2; }
body.home.skypage .tree-band .rt-more circle { fill: #b9c9e6; fill-opacity: 0.7; }
body.home.skypage .tree-band .rt-node, body.home.skypage .tree-band .rt-leaf { fill: #06090f; stroke-width: 1.4; filter: none; }
body.home.skypage .tree-band .rt-ring { fill: rgba(6, 9, 15, 0.8); stroke: #b9c9e6; stroke-width: 1.2; filter: none; }
body.home.skypage .tree-band .rt-tr-node { fill: #b9c9e6; fill-opacity: 0.5; }
body.home.skypage .tree-band .rt-tr-edge { stroke: #b9c9e6; stroke-opacity: 0.25; }
body.home.skypage .tree-band .rt-lp-base { stroke: rgba(255, 255, 255, 0.25); }

/* the sections sit flush with the column and alternate two shades of the paper */
body.home.skypage .longform { max-width: none; padding: var(--fade) 0 0; }
body.home.skypage .sec, body.home.skypage section.block { width: 100%; margin-left: auto !important; margin-right: auto !important; padding-left: calc(max(0px, (100% - var(--band)) / 2) + clamp(20px, 3.4vw, 52px)) !important; padding-right: calc(max(0px, (100% - var(--band)) / 2) + clamp(20px, 3.4vw, 52px)) !important; }
body.home.skypage .task-frame .task-tabs { margin-left: auto !important; margin-right: auto !important; }
/* the paper alternates light / deep down the page, and two sections carry a pale wash instead:
   intro (paper) · mission (sage) · principles (paper) · partners (deep) · advisors (blue-grey)
   · signature (paper) · lightweight (deep) · contribute (paper) · compute (deep) */
body.home.skypage #partners.sec, body.home.skypage #lightweight.sec, body.home.skypage #compute.block {
  background: rgba(20, 20, 19, 0.045) !important;
}
body.home.skypage #mission.sec { background: #e3e7d4 !important; }
body.home.skypage #advisors.sec { background: #e2eaf1 !important; }
body.home.skypage #intro.sec { padding-bottom: clamp(48px, 6vw, 88px); }
body.home.skypage #principles.sec { padding-top: clamp(48px, 6vw, 88px); }

/* ---------------- advisors: six portraits a row, names and affiliations beneath ---------------- */
.advisors { list-style: none; margin: 0 auto; padding: 0; max-width: var(--wide); display: flex; flex-wrap: wrap; justify-content: center; gap: 40px 28px; }
.advisors li { margin: 0; width: calc((100% - 5 * 28px) / 6); }
.advisors a { display: block; text-decoration: none; color: var(--text); }
.advisors img { display: block; width: 100%; height: auto; aspect-ratio: 1; object-fit: cover; border: 1px solid var(--line); border-radius: 0; background: var(--bg-2); filter: none; }
.advisors span { display: block; margin-top: 12px; font-family: var(--font-serif); font-size: 17px; line-height: 1.3; text-align: center; text-wrap: balance; }
.advisors small { display: block; margin-top: 4px; font-family: var(--font-sans); font-size: 12.5px; line-height: 1.35; text-align: center; color: var(--text-3); text-wrap: balance; }
.advisors a:hover span { text-decoration: underline; text-underline-offset: 3px; }
@media (max-width: 960px) { .advisors { gap: 32px 20px; } .advisors li { width: calc((100% - 3 * 20px) / 4); } }
@media (max-width: 520px) { .advisors { gap: 26px 16px; } .advisors li { width: calc((100% - 16px) / 2); } .advisors span { font-size: 16px; } }
.sec-title .paren { font-size: 0.42em; font-family: var(--font-sans); font-weight: 400; color: var(--text-3); letter-spacing: 0; margin-left: 0.4em; vertical-align: middle; }
/* the advisors section is kept in the page but hidden for now */
#advisors[hidden] { display: none !important; }