@import url("https://fonts.googleapis.com/css2?family=DM+Mono:wght@300;400;500&family=Manrope:wght@400;500;600&display=swap");

:root {
  color-scheme: dark;
  --ink: #0d1412;
  --ink-deep: #080d0c;
  --ink-raised: #121d19;
  --paper: #e2e5da;
  --paper-strong: #f4f3e9;
  --muted: #9da9a0;
  --line: rgba(226, 229, 218, 0.17);
  --line-strong: rgba(226, 229, 218, 0.3);
  --signal: #68dbc3;
  --signal-soft: rgba(104, 219, 195, 0.12);
  --bronze: #c08b54;
  --bronze-soft: rgba(192, 139, 84, 0.12);
  --mono: "DM Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --sans: Manrope, Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --content: 1240px;
  --header: 72px;
}

* { box-sizing: border-box; }
html { background: var(--ink); scroll-behavior: smooth; scroll-padding-top: var(--header); }
body {
  margin: 0;
  min-width: 320px;
  color: var(--paper);
  background:
    linear-gradient(rgba(226, 229, 218, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(226, 229, 218, 0.025) 1px, transparent 1px),
    radial-gradient(circle at 82% 8%, rgba(50, 126, 109, 0.14), transparent 34rem),
    linear-gradient(145deg, #0d1412 0%, #101916 58%, #080d0c 100%);
  background-size: 64px 64px, 64px 64px, auto, auto;
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection { color: var(--ink-deep); background: var(--signal); }
a { color: inherit; text-underline-offset: .23em; }
a:focus-visible, [tabindex="-1"]:focus-visible { outline: 2px solid var(--signal); outline-offset: 5px; }

.skip-link {
  position: fixed; top: 10px; left: 10px; z-index: 100;
  padding: 11px 15px; color: var(--ink); background: var(--signal);
  font: 500 12px/1 var(--mono); transform: translateY(-160%);
}
.skip-link:focus { transform: translateY(0); }

.grain {
  position: fixed; inset: 0; z-index: 50; pointer-events: none; opacity: .13;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3' stitchTiles='stitchTiles'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.14'/%3E%3C/svg%3E");
}

.deck-header {
  position: fixed; inset: 0 0 auto; z-index: 40; min-height: var(--header);
  display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 24px;
  padding: 0 max(24px, calc((100vw - var(--content)) / 2));
  border-bottom: 1px solid var(--line); background: rgba(13,20,18,.96); backdrop-filter: blur(14px);
  font: 400 10px/1 var(--mono); letter-spacing: .09em; text-transform: uppercase;
}
.wordmark { display: inline-flex; align-items: center; gap: 12px; width: fit-content; color: var(--paper-strong); text-decoration: none; }
.mark { display: grid; place-items: center; width: 30px; height: 30px; border: 1px solid var(--bronze); }
.mark svg { width: 22px; height: 22px; overflow: visible; }
.mark path { fill: none; stroke: currentColor; stroke-width: 1.6; }
.mark circle { fill: var(--signal); }
.deck-label { color: var(--bronze); }
.deck-header nav { display: flex; justify-content: flex-end; gap: 22px; }
.deck-header nav a { color: var(--muted); text-decoration: none; }
.deck-header nav a:hover { color: var(--paper); }

.rail {
  position: fixed; z-index: 35; right: max(12px, calc((100vw - 1380px) / 2)); top: 50%;
  display: flex; flex-direction: column; gap: 6px; transform: translateY(-50%);
}
.rail a {
  width: 26px; height: 26px; display: grid; place-items: center;
  color: #68726c; border: 1px solid transparent; font: 400 8px/1 var(--mono); text-decoration: none;
  transition: color .15s ease, border-color .15s ease, background .15s ease;
}
.rail a:hover, .rail a[aria-current="true"] { color: var(--signal); border-color: var(--line-strong); background: var(--signal-soft); }

main { scroll-snap-type: y proximity; }
main:focus { outline: none; }
.slide {
  position: relative; min-height: 100svh; display: grid; align-items: center;
  padding: calc(var(--header) + 48px) 52px 48px; border-bottom: 1px solid var(--line);
  scroll-snap-align: start; overflow: hidden;
}
.slide::before {
  position: absolute; inset: 0; content: ""; pointer-events: none;
  background: radial-gradient(circle at 90% 20%, rgba(104,219,195,.04), transparent 30rem);
}
.slide-inner { position: relative; width: min(var(--content), 100%); margin-inline: auto; }

.kicker { margin: 0 0 26px; color: var(--bronze); font: 400 10px/1.4 var(--mono); letter-spacing: .13em; text-transform: uppercase; }
h1, h2, h3, p { text-wrap: pretty; }
h1, h2 { margin: 0; color: var(--paper-strong); font-weight: 500; letter-spacing: -.067em; }
h1 { font-size: clamp(64px, 8.8vw, 132px); line-height: .91; }
h1 em { color: var(--signal); font-style: normal; }
h2 { max-width: 900px; font-size: clamp(48px, 6.7vw, 90px); line-height: .95; }
.lead { max-width: 690px; margin: 34px 0 0; color: #c5cbc3; font-size: clamp(19px, 2vw, 27px); line-height: 1.5; }
.big-copy { max-width: 680px; margin: 32px 0 0; color: var(--muted); font-size: clamp(17px, 1.7vw, 22px); line-height: 1.67; }

.cover { padding-top: calc(var(--header) + 70px); }
.cover-grid { display: grid; grid-template-columns: minmax(0,1.65fr) minmax(250px,.58fr); gap: 50px; align-items: end; }
.cover-copy { align-self: center; }
.cover-index { margin: 0; border-top: 1px solid var(--line-strong); }
.cover-index p { display: grid; gap: 12px; margin: 0; padding: 20px 0; border-bottom: 1px solid var(--line); }
.cover-index span, .world-meta span, .system-focus span, .ask-card span { color: var(--bronze); font: 400 9px/1 var(--mono); letter-spacing: .1em; text-transform: uppercase; }
.cover-index strong { color: var(--paper); font: 400 12px/1.5 var(--mono); }
.cover-diagram {
  grid-column: 1 / -1; position: relative; min-height: 170px; display: grid; grid-template-columns: repeat(6,1fr); align-items: end;
  padding: 0 20px 16px; border: 1px solid var(--line); background-image: linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px); background-size: 40px 40px;
}
.cover-diagram svg { position: absolute; inset: 0; width: 100%; height: 100%; }
.diagram-line,.diagram-glow { fill: none; vector-effect: non-scaling-stroke; }
.diagram-glow { stroke: rgba(104,219,195,.18); stroke-width: 20; filter: blur(13px); }
.diagram-line { stroke: var(--signal); stroke-width: 1.3; }
.cover-diagram circle { fill: var(--ink); stroke: var(--paper); vector-effect: non-scaling-stroke; }
.cover-diagram circle.active { fill: var(--signal); stroke: var(--signal); }
.cover-diagram span { position: relative; color: var(--muted); font: 400 8px/1 var(--mono); letter-spacing: .08em; text-transform: uppercase; }
.cover-diagram span:not(:first-of-type) { text-align: center; }
.cover-diagram span:last-child { text-align: right; }

.split-slide { display: grid; grid-template-columns: minmax(0,1fr) minmax(420px,.82fr); gap: clamp(50px,7vw,110px); align-items: center; }
.operating-stack { border-top: 1px solid var(--line-strong); }
.operating-stack article { display: grid; grid-template-columns: 40px 160px 1fr; gap: 18px; padding: 22px 0; border-bottom: 1px solid var(--line); align-items: baseline; }
.operating-stack span { color: var(--bronze); font: 400 9px/1 var(--mono); }
.operating-stack strong { color: var(--paper-strong); font-size: 15px; font-weight: 500; }
.operating-stack p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.55; }

.slide-heading { display: grid; grid-template-columns: minmax(0,1.5fr) minmax(280px,.5fr); gap: 60px; align-items: end; margin-bottom: 52px; }
.slide-heading h2 { max-width: 820px; font-size: clamp(42px,5.7vw,76px); }
.slide-heading > p { margin: 0; color: var(--muted); font-size: 15px; line-height: 1.7; }
.product-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.product-card { min-height: 390px; display: flex; flex-direction: column; padding: 30px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); background: rgba(13,20,18,.54); text-decoration: none; transition: background .16s ease, border-color .16s ease; }
.product-card:hover { border-color: var(--bronze); background: var(--bronze-soft); }
.product-card.featured { border-top: 2px solid var(--bronze); }
.product-code { color: var(--bronze); font: 400 9px/1.4 var(--mono); letter-spacing: .09em; text-transform: uppercase; }
.product-card strong { margin: auto 0 16px; color: var(--paper-strong); font-size: clamp(30px,3vw,42px); font-weight: 500; letter-spacing: -.045em; }
.product-card p { margin: 0; color: var(--muted); font-size: 15px; line-height: 1.65; }
.product-card small { margin-top: 22px; color: #95a39a; font: 400 10px/1.5 var(--mono); text-transform: uppercase; }
.product-card i { margin-top: 28px; color: var(--signal); font: 400 10px/1 var(--mono); font-style: normal; text-transform: uppercase; }

.world-layout { display: grid; grid-template-columns: minmax(0,1fr) minmax(400px,.84fr); gap: 42px 70px; align-items: stretch; }
.world-copy { align-self: center; }
.world-actions, .ask-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 34px; }
.button { min-height: 46px; display: inline-flex; align-items: center; justify-content: center; padding: 12px 16px; border: 1px solid var(--line-strong); color: var(--paper); font: 400 10px/1.2 var(--mono); letter-spacing: .05em; text-decoration: none; text-transform: uppercase; }
.button:hover { color: var(--paper-strong); border-color: var(--signal); background: var(--signal-soft); }
.button-primary { color: var(--ink-deep); border-color: var(--paper); background: var(--paper); }
.button-primary:hover { color: var(--ink-deep); border-color: var(--signal); background: var(--signal); }
.world-card { position: relative; min-height: 470px; margin: 0; overflow: hidden; border: 1px solid var(--line-strong); background: #071510; }
.world-card::after { position: absolute; inset: 0; content: ""; background: linear-gradient(180deg,rgba(4,12,9,.03) 35%,rgba(4,12,9,.9) 100%); pointer-events: none; }
.world-shot { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: center; }
.shot-label { position: absolute; z-index: 2; top: 18px; left: 18px; padding: 8px 10px; color: var(--paper-strong); border: 1px solid rgba(207,216,181,.42); background: rgba(4,12,9,.78); font: 600 10px/1 var(--mono); letter-spacing: .08em; text-transform: uppercase; }
.world-meta { position: absolute; z-index: 2; inset: auto 18px 18px; display: grid; grid-template-columns: repeat(2,1fr); border-top: 1px solid rgba(226,229,218,.25); border-left: 1px solid rgba(226,229,218,.25); background: rgba(8,13,12,.88); }
.world-meta p { display: grid; gap: 9px; margin: 0; padding: 15px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.world-meta strong { color: var(--paper); font: 400 10px/1.45 var(--mono); }
.castora-strip { grid-column: 1 / -1; display: grid; grid-template-columns: 130px 170px 1fr auto; gap: 24px; align-items: center; padding: 24px; border: 1px solid var(--line); text-decoration: none; }
.castora-strip:hover { border-color: var(--signal); background: var(--signal-soft); }
.castora-strip span { color: var(--bronze); font: 400 9px/1 var(--mono); text-transform: uppercase; }
.castora-strip strong { color: var(--paper-strong); font-size: 24px; font-weight: 500; }
.castora-strip p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.55; }
.castora-strip i { color: var(--signal); font: 400 9px/1 var(--mono); font-style: normal; text-transform: uppercase; }

.compact-heading { margin-bottom: 38px; }
.range-grid { display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.range-grid a { min-height: 210px; display: flex; flex-direction: column; padding: 24px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); background: rgba(13,20,18,.4); text-decoration: none; }
.range-grid a:hover { background: var(--bronze-soft); }
.range-grid span { color: var(--bronze); font: 400 9px/1 var(--mono); letter-spacing: .08em; text-transform: uppercase; }
.range-grid strong { margin: auto 0 10px; color: var(--paper-strong); font-size: 24px; font-weight: 500; letter-spacing: -.035em; }
.range-grid p { margin: 0; color: var(--muted); font-size: 12px; line-height: 1.55; }

.proof-layout { display: grid; grid-template-columns: minmax(0,.85fr) minmax(460px,1fr); gap: 60px 80px; align-items: end; }
.metrics { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.metrics a { min-height: 190px; display: flex; flex-direction: column; justify-content: space-between; padding: 24px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); text-decoration: none; }
.metrics a:hover { background: var(--signal-soft); }
.metrics strong { color: var(--signal); font: 400 clamp(38px,5vw,68px)/1 var(--mono); letter-spacing: -.07em; }
.metrics span { max-width: 220px; color: var(--muted); font-size: 12px; line-height: 1.55; }
.proof-links { grid-column: 1 / -1; display: grid; grid-template-columns: repeat(4,1fr); border-top: 1px solid var(--line); }
.proof-links a { padding: 19px; border-bottom: 1px solid var(--line); border-right: 1px solid var(--line); color: var(--paper); font: 400 9px/1.3 var(--mono); text-transform: uppercase; }
.proof-links a:first-child { border-left: 1px solid var(--line); }
.as-of { grid-column: 1 / -1; margin: -30px 0 0; color: var(--muted); font: 400 11px/1.5 var(--mono); text-transform: uppercase; }

.system-layout { display: grid; grid-template-columns: minmax(0,.8fr) minmax(520px,1fr); gap: 50px 80px; align-items: end; }
.system-loop { display: grid; grid-template-columns: repeat(2,1fr); margin: 0; padding: 0; border-top: 1px solid var(--line); border-left: 1px solid var(--line); list-style: none; }
.system-loop li { min-height: 180px; padding: 22px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.system-loop span { color: var(--bronze); font: 400 9px/1 var(--mono); }
.system-loop strong { display: block; margin: 50px 0 10px; color: var(--paper-strong); font-size: 20px; font-weight: 500; }
.system-loop p { margin: 0; color: var(--muted); font-size: 12px; line-height: 1.55; }
.system-focus { grid-column: 1 / -1; display: grid; grid-template-columns: repeat(3,1fr); border: 1px solid var(--line-strong); }
.system-focus p { display: grid; gap: 12px; margin: 0; padding: 22px; border-right: 1px solid var(--line); }
.system-focus p:last-child { border-right: 0; }
.system-focus strong { color: var(--paper); font: 400 12px/1.5 var(--mono); }

.ask { background: radial-gradient(circle at 75% 20%,rgba(104,219,195,.1),transparent 30rem); }
.ask-layout { display: grid; grid-template-columns: minmax(0,1fr) minmax(410px,.68fr); gap: 54px 80px; align-items: end; }
.ask .lead { max-width: 780px; }
.ask-card { border-top: 2px solid var(--bronze); }
.ask-card p { display: grid; gap: 12px; margin: 0; padding: 20px 0; border-bottom: 1px solid var(--line); }
.ask-card strong { color: var(--paper); font: 400 12px/1.5 var(--mono); }
.ask-actions { grid-column: 1 / -1; margin-top: 0; }
.closing { grid-column: 1 / -1; margin: 18px 0 0; color: #526059; font: 400 10px/1 var(--mono); letter-spacing: .14em; text-transform: uppercase; }

@media (max-width: 1080px) {
  .rail { display: none; }
  .slide { padding-inline: 32px; }
  .split-slide, .world-layout, .proof-layout, .system-layout, .ask-layout { grid-template-columns: 1fr; }
  .cover-grid { grid-template-columns: minmax(0,1fr) 250px; }
  .world-card { min-height: 420px; }
  .range-grid { grid-template-columns: repeat(2,1fr); }
  .system-focus, .ask-actions, .closing { grid-column: auto; }
  .ask-actions, .closing { grid-column: 1 / -1; }
}

@media (max-width: 760px) {
  :root { --header: 64px; }
  .deck-header { grid-template-columns: 1fr auto; padding-inline: 16px; }
  .deck-label, .deck-header nav a:first-child { display: none; }
  .slide { min-height: auto; padding: calc(var(--header) + 56px) 20px 62px; overflow: visible; }
  main { scroll-snap-type: none; }
  h1 { font-size: clamp(54px,18vw,82px); }
  h2 { font-size: clamp(42px,13vw,62px); }
  .lead { font-size: 18px; }
  .cover-grid, .slide-heading { grid-template-columns: 1fr; gap: 34px; }
  .cover-index { display: grid; grid-template-columns: repeat(2,1fr); }
  .cover-index p:nth-child(odd) { border-right: 1px solid var(--line); padding-right: 16px; }
  .cover-index p:nth-child(even) { padding-left: 16px; }
  .cover-diagram { min-height: 140px; overflow: hidden; }
  .cover-diagram span { font-size: 7px; }
  .operating-stack article { grid-template-columns: 34px 1fr; }
  .operating-stack p { grid-column: 2; }
  .product-grid, .metrics, .system-loop { grid-template-columns: 1fr; }
  .product-card { min-height: 330px; }
  .world-card { min-height: 450px; }
  .castora-strip { grid-template-columns: 1fr auto; }
  .castora-strip p { grid-column: 1 / -1; }
  .range-grid { grid-template-columns: 1fr; }
  .range-grid a { min-height: 180px; }
  .proof-links { grid-template-columns: repeat(2,1fr); }
  .as-of { margin: -18px 0 0; }
  .system-focus { grid-template-columns: 1fr; }
  .system-focus p { border-right: 0; border-bottom: 1px solid var(--line); }
  .system-focus p:last-child { border-bottom: 0; }
  .ask-actions { flex-direction: column; }
  .ask-actions .button { width: 100%; }
}

@media (max-width: 420px) {
  .cover-index { grid-template-columns: 1fr; }
  .cover-index p { padding: 17px 0 !important; border-right: 0 !important; }
  .cover-diagram { display: none; }
  .world-card { min-height: 500px; }
  .world-meta { grid-template-columns: 1fr; }

  .proof-links { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition-duration: .01ms !important; animation-duration: .01ms !important; }
}

@media print {
  .deck-header, .rail, .grain, .skip-link { display: none; }
  body { background: var(--ink); }
  .slide { min-height: 100vh; break-after: page; padding: 52px; }
  .slide:last-child { break-after: auto; }
}