/* swarm landing page
   Theme: locked light, on warm parchment — never pure white.
   Type is the whole identity: an editorial serif at weight 400 announces, and a
   monospace instructs. Every functional string — nav, buttons, body, labels,
   chips, code — is mono. Headings never go bold; tracking does that work.
   One saturated fill in the page (Lake Blue) marks the single primary action.
   The pastels are decorative only: they live in the hero wash and the diagrams.
   Radius: buttons and tags = pill · cards, panels and code = 40px.
   No shadows anywhere — elevation is a 1px ash hairline and a surface change.
   Motion: Lenis smooth scroll, a scroll-driven 3D corridor of stations, a canvas
   swarm field, pointer tilt on cards. All of it collapses under prefers-reduced-motion. */

@font-face {
  font-family: "Geist";
  src: url("fonts/geist-latin.woff2") format("woff2");
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}
/* the body voice, not an afterthought for code */
@font-face {
  font-family: "Geist Mono";
  src: url("fonts/geist-mono-latin.woff2") format("woff2");
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}
/* every heading in the page, always at 400. Emphasis inside a headline uses
   this same family's italic, never a second family and never a heavier cut. */
@font-face {
  font-family: "Playfair Display";
  src: url("fonts/playfair-latin.woff2") format("woff2");
  font-weight: 400 900;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Playfair Display";
  src: url("fonts/playfair-italic-latin.woff2") format("woff2");
  font-weight: 400 900;
  font-style: italic;
  font-display: swap;
}

:root {
  --paper: #F6F3F1;      /* parchment: the signature surface */
  --paper-2: #EFEAE7;
  --surface: #FBF9F8;    /* a hair above the canvas, so a card reads without a shadow */

  --ink: #242424;
  --body: #4E4D4D;
  --muted: #797776;

  --line: #CECAC8;       /* ash: every border and divider in the page is this */
  --line-2: #CECAC8;

  /* the single saturated fill, spent on one action per screen */
  --accent: #2B59D1;
  --accent-deep: #2247AC;

  /* decorative only — hero wash and diagram illustration, never a UI fill */
  --periwinkle: #CFDAF5;
  --sky: #A0B5EB;
  --mint: #A7FCCD;
  --coral: #FF9473;
  --gold: #ECDA98;

  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --wrap: 1432px;
  --mono: "Geist Mono", ui-monospace, SFMono-Regular, "SF Mono", Menlo, Monaco, Consolas, monospace;
  --sans: "Geist", ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  --display-font: "Playfair Display", "Iowan Old Style", Georgia, Cambria, "Times New Roman", serif;

  --span: 820px; /* z distance between stations, mirrored in main.js */
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; color-scheme: light; }

/* Lenis drives scroll position, so native smoothing stands down. */
html.lenis, html.lenis body { height: auto; }
.lenis.lenis-smooth { scroll-behavior: auto !important; }
.lenis.lenis-stopped { overflow: hidden; }

/* the mono is the default voice. Headings opt into the serif, nothing else does. */
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--mono);
  font-size: 16px;
  line-height: 1.35;
  letter-spacing: -0.025em;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
::selection { background: rgba(43, 89, 209, 0.16); }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }

.skip {
  position: absolute; left: -9999px; top: 12px; z-index: 100;
  padding: 12px 24px; background: var(--accent); color: #fff;
  border-radius: 100px; font-size: 14px; text-transform: uppercase;
}
.skip:focus { left: 16px; }

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: clamp(24px, 5vw, 64px);
}

/* the meta voice: mono, small, uppercase, tightly tracked */
.eyebrow, .station-n, .hud-step, .code-head, .footer-inner, .figure dt, .proof-link span {
  font-size: 12px; line-height: 1.2; letter-spacing: -0.033em;
  text-transform: uppercase;
}

/* ── nav ─────────────────────────────────────────────────── */

.nav {
  position: fixed; inset: 0 0 auto 0; height: 80px; z-index: 50;
  border-bottom: 1px solid transparent;
  transition: background 0.4s var(--ease), border-color 0.4s var(--ease);
}
.nav.is-stuck {
  background: rgba(246, 243, 241, 0.86);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom-color: var(--line);
}
.nav-inner {
  height: 100%; max-width: var(--wrap); margin-inline: auto;
  padding-inline: clamp(24px, 5vw, 64px);
  display: flex; align-items: center; gap: 32px;
}
/* wordmark plus the circular dot mark */
.brand {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 20px; letter-spacing: -0.02em;
}
.brand-mark { width: 20px; height: 20px; color: var(--ink); }
.nav-links {
  display: flex; gap: 32px; margin-left: auto;
  font-size: 14px; letter-spacing: -0.02em; text-transform: uppercase;
  color: var(--ink);
}
.nav-links a { white-space: nowrap; transition: color 0.25s var(--ease); }
.nav-links a:hover { color: var(--muted); }

/* ── buttons ─────────────────────────────────────────────── */

/* Pills, always. No shadow, no gradient — a fill or a hairline and nothing else. */
.btn {
  display: inline-flex; align-items: center; gap: 10px; white-space: nowrap;
  border-radius: 100px; padding: 16px 32px;
  font-family: var(--mono);
  font-size: 14px; line-height: 1; letter-spacing: -0.02em; text-transform: uppercase;
  border: 1px solid transparent;
  transition: background 0.3s var(--ease), border-color 0.3s var(--ease), color 0.3s var(--ease);
}

/* Lake Blue is spent here and nowhere else on the page: one primary action. */
.btn-primary {
  background: var(--accent);
  color: #FFFFFF;
  border-color: var(--accent);
}
.btn-primary:hover { background: var(--accent-deep); border-color: var(--accent-deep); }

.btn-ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--ink);
}
.btn-ghost:hover { background: var(--ink); color: var(--paper); }

/* the nav action is the off-black pill, so the blue stays singular */
.nav-cta {
  padding: 12px 24px;
  background: var(--ink); color: var(--paper); border-color: var(--ink);
}
.nav-cta:hover { background: #000000; border-color: #000000; }

/* the arrow leads the eye out on hover */
.btn span[aria-hidden] {
  display: inline-block;
  transition: transform 0.28s var(--ease);
}
.btn:hover span[aria-hidden] { transform: translateX(3px); }

/* ── type ────────────────────────────────────────────────── */

/* every heading below stays at 400. The serif's stroke contrast and the
   -0.02em tracking carry the weight; a bold cut would break the voice. */
.display {
  margin: 0;
  font-family: var(--display-font);
  font-size: clamp(3rem, 6.2vw, 5rem);
  line-height: 1.2; letter-spacing: -0.02em; font-weight: 400;
}
.display em { font-style: italic; font-weight: 400; }
.h2 {
  margin: 0 0 clamp(40px, 5vw, 64px);
  font-family: var(--display-font);
  font-size: clamp(2rem, 3.6vw, 3rem);
  line-height: 1.2; letter-spacing: -0.02em; font-weight: 400;
}
.lede {
  margin: 32px 0 0; max-width: 56ch;
  font-size: 20px; line-height: 1.35; letter-spacing: -0.02em;
  color: var(--body);
}
.eyebrow { margin: 0 0 24px; color: var(--muted); }
.section { padding-block: clamp(96px, 12vw, 200px); position: relative; z-index: 1; }

/* ══ the page as one continuous space ══════════════════════════
   A fixed tunnel behind everything, and each section flown to rather than
   stacked: it arrives from the right, squares up to be read, then banks away
   to the left as the next one comes in. */

.world {
  position: fixed; inset: 0; z-index: 0;
  perspective: 900px; perspective-origin: 50% 44%;
  pointer-events: none; overflow: hidden;
  transform-style: preserve-3d;
  opacity: 0.85;
}

/* JS writes the transform. The section is flat and untransformed while it is
   in the reading band, so settled text composites crisply. Perspective is
   applied per element rather than on a shared ancestor, because a transformed
   ancestor would become the containing block for the corridor's sticky stage
   and for the fixed nav. */
[data-waypoint] {
  transform-origin: 50% 50%;
  backface-visibility: hidden;
}

/* ── hero ────────────────────────────────────────────────── */

.hero {
  position: relative;
  min-height: 100dvh;
  display: flex; align-items: center;
  padding-top: 112px; padding-bottom: clamp(48px, 8vh, 88px);
  overflow: hidden;
  /* the atmospheric wash: coral into sky into mint, at low opacity and softly
     diffused. This is where the pastels are allowed to live. */
  background:
    radial-gradient(48% 42% at 10% 6%, rgba(255, 148, 115, 0.30), transparent 70%),
    radial-gradient(40% 36% at 58% 6%, rgba(236, 218, 152, 0.28), transparent 72%),
    radial-gradient(54% 46% at 84% 66%, rgba(160, 181, 235, 0.34), transparent 72%),
    radial-gradient(40% 38% at 34% 92%, rgba(167, 252, 205, 0.26), transparent 72%),
    var(--paper);
}
.swarm-canvas { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }
/* keeps the headline legible over the canvas without ending on a hard edge:
   masked off below the copy so the world grid comes up to meet the corridor
   instead of a seam running across the page */
.hero-veil {
  position: absolute; inset: 0;
  background: linear-gradient(100deg, rgba(246, 243, 241, 0.96) 38%, rgba(246, 243, 241, 0.6) 58%, rgba(246, 243, 241, 0) 82%);
  -webkit-mask-image: linear-gradient(to bottom, #000 0%, #000 56%, transparent 96%);
  mask-image: linear-gradient(to bottom, #000 0%, #000 56%, transparent 96%);
}
.hero-inner { position: relative; z-index: 2; }
.cta-row { display: flex; flex-wrap: wrap; gap: 16px; margin-top: 40px; }

/* entrance: one cascade on load, nothing loops */
@media (prefers-reduced-motion: no-preference) {
  .hero-inner > * {
    opacity: 0;
    animation: rise 1s var(--ease) forwards;
  }
  .hero-inner > .display { animation-delay: 0.1s; }
  .hero-inner > .lede { animation-delay: 0.26s; }
  .hero-inner > .cta-row { animation-delay: 0.4s; }
}
@keyframes rise {
  from { opacity: 0; transform: translateY(18px); }
  to { opacity: 1; transform: none; }
}

/* ══ the run: a 3D corridor of stations ═══════════════════════
   The lane translates in Z toward the viewer. Stations, gate rings and
   agent motes all sit at fixed Z inside it, so one transform moves the
   whole world and everything parallaxes for free. */

.journey { --steps: 8; height: calc(var(--steps) * 78svh + 62svh); position: relative; }
/* No background of its own. Two adjacent full-bleed backgrounds can never be
   made to meet cleanly and the seam showed on every boundary, so the stage is
   transparent and the page-wide world shows straight through it. The corridor
   is then the same room as the rest of the page, not a panel dropped into it. */
.journey-stage {
  position: sticky; top: 0; height: 100dvh; overflow: hidden;
}

/* The stage clips at its own edges, which sliced the rings and motes off in a
   dead straight line across the page. This fades them out instead. The mask is
   safe here because it groups the perspective container, not the 3D-positioned
   children inside it, so the corridor's depth sorting is untouched. */
.corridor {
  position: absolute; inset: 0;
  perspective: 900px;
  perspective-origin: 50% 44%;
  -webkit-mask-image: linear-gradient(to bottom, transparent 0%, #000 15%, #000 85%, transparent 100%);
  mask-image: linear-gradient(to bottom, transparent 0%, #000 15%, #000 85%, transparent 100%);
}

.grid-plane {
  position: absolute; left: 50%;
  width: 3600px; margin-left: -1800px; height: 4600px;
  background-image:
    linear-gradient(to right, var(--line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--line) 1px, transparent 1px);
  background-size: 130px 130px;
  background-position: 0 calc(var(--floor, 0) * 1px);
}
.grid-floor {
  top: 62%;
  transform-origin: 50% 0%;
  transform: rotateX(90deg);
  -webkit-mask-image: linear-gradient(to bottom, #000 0%, rgba(0, 0, 0, 0.34) 22%, transparent 54%);
  mask-image: linear-gradient(to bottom, #000 0%, rgba(0, 0, 0, 0.34) 22%, transparent 54%);
}
/* mirrored: pivots on its own bottom edge so the plane lays back overhead,
   and the mask fades toward its far end, which is now its local top */
.grid-ceil {
  bottom: 66%;
  transform-origin: 50% 100%;
  transform: rotateX(-90deg);
  opacity: 0.55;
  -webkit-mask-image: linear-gradient(to top, #000 0%, rgba(0, 0, 0, 0.3) 22%, transparent 52%);
  mask-image: linear-gradient(to top, #000 0%, rgba(0, 0, 0, 0.3) 22%, transparent 52%);
}
/* the walls close in as ash, so the tunnel feels enclosed without a vignette */
.rail {
  position: absolute; top: 0; bottom: 0; width: 24vw; pointer-events: none;
}
.rail-l { left: 0; background: linear-gradient(90deg, rgba(206, 202, 200, 0.4), transparent); }
.rail-r { right: 0; background: linear-gradient(270deg, rgba(206, 202, 200, 0.4), transparent); }

.lane {
  position: absolute; inset: 0;
  transform-style: preserve-3d;
  transform: translateZ(calc(var(--cam, 0) * 1px)) rotateZ(calc(var(--roll, 0) * 1deg));
  will-change: transform;
}

/* gate rings: you pass through one per station, which is the single strongest
   cue that the camera is travelling rather than the cards sliding */
.ring {
  position: absolute; left: 50%; top: 44%;
  width: 1240px; height: 760px; margin: -380px 0 0 -620px;
  border: 1px solid var(--line);
  border-radius: 40px;
  /* half a span nearer than its station, so you pass through the gate first
     and the station arrives immediately behind it */
  transform: translateZ(calc(var(--i) * var(--span) * -1 + 410px));
  opacity: 0;
}
.ring::before {
  content: ""; position: absolute; inset: 16px;
  border: 1px solid rgba(206, 202, 200, 0.5);
  border-radius: 40px;
}

/* agent motes: volume between the stations. JS writes the positions once and
   only toggles visibility as they pass the camera. */
.motes { position: absolute; inset: 0; transform-style: preserve-3d; }
.motes i {
  position: absolute; left: 50%; top: 44%;
  width: 7px; height: 7px; margin: -3.5px 0 0 -3.5px;
  border-radius: 9999px; background: var(--sky);
  transform: translate3d(var(--mx), var(--my), var(--mz));
}

/* .station only positions in 3D; .station-inner does the painting and the
   fading. Splitting them keeps the transform off the element that composites. */
.station {
  position: absolute; left: 50%; top: 44%;
  width: min(880px, 86vw);
  transform: translate(-50%, -50%) translate3d(var(--x), var(--y), calc(var(--i) * var(--span) * -1));
}
/* Opaque on purpose: a part-faded card is a translucent card, and two of them
   overlapping means the far one reads straight through the near one's surface.
   The fill sits a hair above the canvas so the card still separates from the
   page without a shadow, which this system does not use. */
.station-inner {
  display: grid; grid-template-columns: minmax(0, 1fr) 300px;
  align-items: center; gap: clamp(24px, 2.6vw, 40px);
  padding: 40px;
  border: 1px solid var(--line);
  border-radius: 40px;
  background: var(--surface);
  opacity: 0;
}
/* stations alternate side and swap which column carries the diagram, so the
   corridor never settles into a repeating slide */
.station:nth-of-type(odd) { --x: -76px; --y: -28px; }
.station:nth-of-type(even) { --x: 76px; --y: 28px; }
.station:nth-of-type(even) .station-inner { grid-template-columns: 300px minmax(0, 1fr); }
.station:nth-of-type(even) .station-card { order: 2; }
.station:nth-of-type(even) .station-art { order: 1; }

.station-n {
  display: inline-flex; align-items: center; gap: 10px;
  margin-bottom: 20px;
  color: var(--muted);
}
.station-n::before {
  content: ""; width: 16px; height: 1px; background: var(--line);
}
.station h3 {
  margin: 0 0 16px;
  font-family: var(--display-font);
  font-size: clamp(1.5rem, 2.3vw, 2rem);
  line-height: 1.2; letter-spacing: -0.02em; font-weight: 400;
}
.station p { margin: 0; color: var(--body); font-size: 16px; line-height: 1.35; max-width: 46ch; }

/* ── station diagrams ────────────────────────────────────────
   Each one shows how its phase actually works. They draw themselves when the
   station takes the frame and reset once it leaves, so re-scrolling replays.
   These are illustration, which is the one place the pastels belong. */

.station-art { width: 100%; }
.sa { width: 100%; height: auto; display: block; font-family: var(--mono); }

.sa-wire path { fill: none; stroke: var(--sky); stroke-width: 1.7; }
.sa-wire-faint path { stroke: var(--line); stroke-width: 1.4; }
.sa-box rect { fill: var(--paper); stroke: var(--line); stroke-width: 1; }
.sa-label, .sa-ask { font-size: 10.5px; letter-spacing: -0.033em; text-transform: uppercase; }
.sa-label text, text.sa-label { fill: var(--muted); }
.sa-ask text { fill: var(--body); }
.sa-label-mid { text-anchor: middle; }
.sa-label-end { text-anchor: end; }
.sa-label-soft { fill: var(--muted); opacity: 0.7; }
.sa-core { fill: var(--paper); stroke: var(--ink); stroke-width: 1.6; }
.sa-dot { fill: var(--ink); }
.sa-node circle { fill: var(--paper); stroke: var(--sky); stroke-width: 1.8; }
.sa-node .sa-node-off { stroke: var(--line); }
/* coral is the one place a fault is allowed to shout, and only inside a diagram */
.sa-fault { fill: rgba(255, 148, 115, 0.35); stroke: var(--coral); stroke-width: 2; }
.sa-claim { fill: var(--periwinkle); stroke: var(--sky); stroke-width: 1; }
.sa-trunk { stroke: var(--line); stroke-width: 1.6; }
.sa-sheet { fill: var(--paper); stroke: var(--line); stroke-width: 1; }
.sa-bar rect { fill: #DED9D6; }
.sa-bar .sa-bar-hit { fill: var(--sky); }
.sa-scan { fill: var(--coral); opacity: 0; }
.sa-check rect { fill: var(--paper); stroke: var(--line); stroke-width: 1; }
.sa-tick path { fill: none; stroke: var(--ink); stroke-width: 2.2; stroke-linecap: round; stroke-linejoin: round; }
.sa-arrow { fill: none; stroke: var(--ink); stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }

@media (prefers-reduced-motion: no-preference) {
  /* pathLength="1" lets one dash rule drive every path regardless of length */
  .sa-wire path, .sa-tick path {
    stroke-dasharray: 1; stroke-dashoffset: 1;
  }
  .sa-box rect, .sa-check rect, .sa-node circle, .sa-claim, .sa-fault,
  .sa-label text, text.sa-label, .sa-ask text, .sa-arrow, .sa-bar rect {
    opacity: 0;
  }

  .station.is-live .sa-wire path,
  .station.is-live .sa-tick path { animation: draw 0.9s var(--ease) forwards; }
  .station.is-live .sa-wire path:nth-child(2),
  .station.is-live .sa-tick path:nth-child(2) { animation-delay: 0.09s; }
  .station.is-live .sa-wire path:nth-child(3),
  .station.is-live .sa-tick path:nth-child(3) { animation-delay: 0.18s; }
  .station.is-live .sa-wire path:nth-child(4),
  .station.is-live .sa-tick path:nth-child(4) { animation-delay: 0.27s; }
  .station.is-live .sa-wire path:nth-child(5) { animation-delay: 0.36s; }

  .station.is-live .sa-box rect,
  .station.is-live .sa-check rect,
  .station.is-live .sa-node circle,
  .station.is-live .sa-claim,
  .station.is-live .sa-fault,
  .station.is-live .sa-label text,
  .station.is-live text.sa-label,
  .station.is-live .sa-ask text,
  .station.is-live .sa-arrow,
  .station.is-live .sa-bar rect { animation: fadeIn 0.5s var(--ease) 0.2s forwards; }
  .station.is-live .sa-ask text { animation-delay: 0.7s; }
  .station.is-live .sa-fault { animation: fadeIn 0.5s var(--ease) 0.5s forwards; }

  .station.is-live .sa-scan { animation: scan 2.4s var(--ease) 0.4s infinite; }
}

@keyframes draw { to { stroke-dashoffset: 0; } }
@keyframes fadeIn { to { opacity: 1; } }
@keyframes scan {
  0% { opacity: 0; transform: translateY(0); }
  12% { opacity: 0.7; }
  88% { opacity: 0.7; }
  100% { opacity: 0; transform: translateY(178px); }
}

/* ── the run: heads-up display ───────────────────────────── */

.journey-hud {
  position: absolute; left: 0; right: 0; bottom: clamp(32px, 5vh, 56px);
  max-width: var(--wrap); margin-inline: auto;
  padding-inline: clamp(24px, 5vw, 64px);
  z-index: 3; pointer-events: none;
}
.hud-note { margin: 0 0 20px; max-width: 44ch; color: var(--body); font-size: 14px; line-height: 1.35; }
.hud-rail { display: flex; gap: 6px; width: min(420px, 60vw); }
.hud-rail i {
  flex: 1; height: 1px; background: var(--line);
  transition: background 0.4s var(--ease);
}
.hud-rail i.on { background: var(--ink); }
.hud-step { margin: 16px 0 0; color: var(--ink); }

/* ── reveal ──────────────────────────────────────────────── */

.reveal {
  opacity: 0; transform: translateY(20px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
  transition-delay: calc(var(--i, 0) * 80ms);
}
.reveal.is-in { opacity: 1; transform: none; }

/* ── the thesis ──────────────────────────────────────────── */

.statement { padding-block: clamp(120px, 15vw, 216px); }
.statement-line {
  margin: 0; max-width: 22ch;
  font-family: var(--display-font);
  font-size: clamp(2.4rem, 5vw, 4rem);
  line-height: 1.2; letter-spacing: -0.02em; font-weight: 400;
}
.statement-line em { font-style: italic; font-weight: 400; }
.statement-tail {
  margin: 40px 0 0;
  font-size: 20px; line-height: 1.35; letter-spacing: -0.02em;
  color: var(--body);
}

/* ── cards ───────────────────────────────────────────────── */

/* stretch, so the two cards match height and their figure blocks share a baseline */
.pair { display: grid; grid-template-columns: 1fr 1fr; align-items: stretch; gap: 24px; }

/* A hairline and a surface change carry every card in this page. No shadow. */
.card, .tile {
  border: 1px solid var(--line);
  border-radius: 40px;
  background: transparent;
  transition: border-color 0.4s var(--ease), background 0.4s var(--ease);
}
.card { display: flex; flex-direction: column; overflow: hidden; }
.card:hover, .tile:hover { background: var(--surface); border-color: #BDB8B5; }

/* pointer tilt: JS writes --rx / --ry, nothing else moves */
.tilt {
  transform: perspective(1000px) rotateX(var(--rx, 0deg)) rotateY(var(--ry, 0deg));
  transform-style: preserve-3d;
  transition: transform 0.5s var(--ease), border-color 0.4s var(--ease), background 0.4s var(--ease);
}
.tilt.is-tilting { transition: transform 0.12s linear, border-color 0.4s var(--ease), background 0.4s var(--ease); }
.reveal.tilt { transform: perspective(1000px) translateY(20px); }
.reveal.tilt.is-in { transform: perspective(1000px) rotateX(var(--rx, 0deg)) rotateY(var(--ry, 0deg)); }

/* the body sets the divider height for both cards, so the two hairlines in the
   pair land on the same line however much sits below them */
.card-body { padding: 40px 40px 32px; }
/* card titles are headings, so they are the serif at 400 — not the mono */
.card-body h3 {
  margin: 0 0 16px;
  font-family: var(--display-font);
  font-size: 24px; line-height: 1.2; letter-spacing: -0.02em; font-weight: 400;
}
.card-body p { margin: 0; color: var(--body); font-size: 16px; line-height: 1.35; max-width: 46ch; }

/* The numbers are the whole argument, so they are set as figures. Filled
   progress tracks read as dashboard chrome on a landing page, and they were
   also a second set of boxes inside an already-bordered card. */
.figures {
  margin: 0; padding: 0;
  display: grid; grid-template-columns: 1fr 1fr;
  border-top: 1px solid var(--line);
}
.figure { padding: 32px 40px; }
.figure + .figure { border-left: 1px solid var(--line); }
.figure dt { margin: 0 0 16px; color: var(--muted); }
.figure dd { margin: 0; display: flex; align-items: baseline; gap: 8px; }
.figure-n {
  font-family: var(--display-font);
  font-size: 40px; line-height: 1.2; letter-spacing: -0.02em; font-weight: 400;
  font-variant-numeric: tabular-nums;
}
.figure dd i { font-style: normal; font-size: 12px; color: var(--muted); text-transform: uppercase; }
.card-foot {
  margin: 0; padding: 0 40px 40px;
  font-size: 14px; line-height: 1.35; color: var(--muted);
}

/* claim, handoff, verdict. Hairlines and type instead of nested boxes. */
.proof {
  margin: 0;
  padding: 40px;
  border-top: 1px solid var(--line);
}
.proof-claim {
  margin: 0;
  font-family: var(--display-font); font-style: italic; font-weight: 400;
  font-size: 24px; line-height: 1.2; letter-spacing: -0.02em; color: var(--ink);
}
.proof-link {
  position: relative; display: flex; align-items: center;
  min-height: 48px; margin: 12px 0 8px; padding-left: 24px;
}
.proof-link::before {
  content: ""; position: absolute; left: 4px; top: 0; bottom: 0;
  width: 1px; background: var(--line);
}
.proof-link i {
  position: absolute; left: 1.5px; top: 9px;
  width: 6px; height: 6px; border-radius: 9999px; background: var(--sky);
  opacity: 0;
}
.is-in .proof-link i { animation: travel 2.2s var(--ease) 0.6s infinite; }
@keyframes travel {
  0% { opacity: 0; transform: translateY(0) }
  18% { opacity: 1 }
  76% { opacity: 1; transform: translateY(22px) }
  100% { opacity: 0; transform: translateY(28px) }
}
.proof-link span { color: var(--muted); }
.proof-verdict { margin: 0; display: flex; align-items: baseline; gap: 20px; font-size: 16px; }
.proof-verdict b { font-weight: 500; color: var(--ink); }
.proof-verdict s { color: var(--muted); opacity: 0.7; text-decoration-thickness: 1px; }

/* ── bento ───────────────────────────────────────────────── */

.bento { display: grid; grid-template-columns: repeat(12, 1fr); gap: 24px; }
.tile { padding: 40px; }
.tile h3 {
  margin: 0 0 16px;
  font-family: var(--display-font);
  font-size: 24px; line-height: 1.2; letter-spacing: -0.02em; font-weight: 400;
}
.tile p { margin: 0; color: var(--body); font-size: 16px; line-height: 1.35; max-width: 52ch; }

/* copy and diagram sit side by side, so the branch art is not stretched to the
   full tile width, which blows its type up past the body text around it */
.tile-wide {
  grid-column: span 12;
  display: grid; grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
  align-items: center; gap: clamp(32px, 3vw, 64px);
}
.branch-art { width: 100%; height: auto; }

/* the one card that takes a coloured surface, so the eye lands somewhere */
.tile-tinted {
  grid-column: span 5;
  background: var(--periwinkle); border-color: var(--periwinkle);
}
.tile-tinted:hover { background: #C4D2F2; border-color: #C4D2F2; }
.tile-chips { grid-column: span 7; }
.tile-last { grid-column: span 12; }

.ticks { list-style: none; margin: 0; padding: 0; display: grid; gap: 16px; }
.ticks li { position: relative; padding-left: 28px; color: var(--body); font-size: 16px; line-height: 1.35; }
.ticks li::before {
  content: ""; position: absolute; left: 3px; top: 7px;
  width: 9px; height: 5px;
  border-left: 1.4px solid var(--ink); border-bottom: 1.4px solid var(--ink);
  transform: rotate(-45deg);
}

/* pipeline-style tags: parchment fill, ash hairline, full pill */
.chips { list-style: none; margin: 24px 0 0; padding: 0; display: flex; flex-wrap: wrap; gap: 8px; }
.chips li {
  font-size: 14px; letter-spacing: -0.02em; text-transform: uppercase; color: var(--ink);
  padding: 12px 20px; border: 1px solid var(--line); border-radius: 9999px;
  background: var(--paper);
}

.tiers { margin: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 24px 32px; }
.tiers div { display: grid; gap: 8px; }
.tiers dt { font-size: 16px; font-weight: 500; letter-spacing: -0.025em; }
.tiers dd { margin: 0; font-size: 12px; letter-spacing: -0.033em; text-transform: uppercase; color: var(--muted); }

/* ── install ─────────────────────────────────────────────── */

.section-install { padding-bottom: clamp(96px, 10vw, 144px); }
.install-wrap { max-width: 900px; }
.install-wrap .h2 { margin-bottom: 40px; }

.code {
  border: 1px solid var(--line); border-radius: 40px;
  background: var(--surface); overflow: hidden;
}
.code-head {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 20px 24px 20px 40px; border-bottom: 1px solid var(--line);
  color: var(--muted);
}
/* the ghost pill, at tag scale */
.copy {
  font: inherit; font-size: 12px; letter-spacing: -0.033em; text-transform: uppercase;
  color: var(--ink); background: transparent; border: 1px solid var(--ink);
  border-radius: 100px; padding: 10px 20px; cursor: pointer;
  transition: background 0.3s var(--ease), color 0.3s var(--ease);
}
.copy:hover { background: var(--ink); color: var(--paper); }
.copy.is-done { background: var(--ink); color: var(--paper); }

.code pre {
  margin: 0; padding: 32px 40px 36px; overflow-x: auto;
  font-family: var(--mono); font-size: 14px; line-height: 1.9;
  letter-spacing: -0.02em; color: var(--ink);
}
.code .c { color: var(--muted); }

.install-note { margin: 56px 0 20px; color: var(--body); font-size: 16px; }
.prompts { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; }
.prompts li {
  font-size: 14px; line-height: 1.5; letter-spacing: -0.02em; color: var(--body);
  padding: 20px 32px; border: 1px solid var(--line);
  border-radius: 9999px; background: transparent;
}

/* ── footer ──────────────────────────────────────────────── */

.footer { border-top: 1px solid var(--line); padding-block: 40px; position: relative; z-index: 1; }
.footer-inner {
  display: flex; flex-wrap: wrap; gap: 12px 32px; align-items: center;
  color: var(--muted);
}
.footer-inner a { margin-left: auto; transition: color 0.25s var(--ease); }
.footer-inner a:hover { color: var(--ink); }

/* ── responsive ──────────────────────────────────────────── */

@media (max-width: 1180px) {
  .station-inner { grid-template-columns: minmax(0, 1fr) 250px; }
  .station:nth-of-type(even) .station-inner { grid-template-columns: 250px minmax(0, 1fr); }
}

@media (max-width: 1000px) {
  .pair { grid-template-columns: 1fr; }
  .br-lg { display: none; }
  .hero-veil {
    background: linear-gradient(180deg,
      rgba(246, 243, 241, 0) 0%, rgba(246, 243, 241, 0.7) 32%, rgba(246, 243, 241, 0.96) 60%);
  }
}

@media (max-width: 900px) {
  .tile-tinted, .tile-chips { grid-column: span 12; }
  .tile-wide { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  .nav-links { display: none; }
  .nav-cta { margin-left: auto; }
  .hero { padding-top: 104px; }
  .cta-row .btn { flex: 1 1 auto; justify-content: center; }
  .tiers { grid-template-columns: 1fr; }
  .card-body, .figure, .proof, .tile { padding: 28px; }
  .card-foot { padding: 0 28px 28px; }
  .code-head { padding: 20px 20px 20px 28px; }
  .code pre { padding: 28px; }
  .prompts li { border-radius: 32px; }
}

/* The corridor needs viewport height and a real pointer. Below that, and for
   anyone who asked for less motion, the same stations stack into an ordinary
   list. They are the same elements, not a second copy of the copy, so the
   diagrams come along and there is only one place to edit a phase. */
@media (max-width: 860px), (prefers-reduced-motion: reduce) {
  .journey { height: auto; padding-block: clamp(96px, 12vw, 200px); }
  .journey-stage { position: static; height: auto; background: none; overflow: visible; }
  .world, .motes, .ring, .fog, .journey-hud { display: none; }

  .corridor { position: static; perspective: none; mask-image: none; -webkit-mask-image: none; }
  .lane {
    position: static; transform: none; will-change: auto;
    display: grid; gap: 24px;
    max-width: var(--wrap); margin-inline: auto;
    padding-inline: clamp(24px, 5vw, 64px);
  }
  .station { position: static; width: auto; transform: none; }
  .station-inner {
    opacity: 1;
    grid-template-columns: 1fr;
    gap: 32px;
    padding: clamp(28px, 6vw, 40px);
    background: transparent;
  }
  .station:nth-of-type(even) .station-inner { grid-template-columns: 1fr; }
  .station:nth-of-type(even) .station-card,
  .station:nth-of-type(even) .station-art { order: 0; }
  .station-art { max-width: 340px; }
  .station p { max-width: 60ch; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  .reveal { opacity: 1; transform: none; }
  .reveal.tilt, .reveal.tilt.is-in { transform: none; }
  .hero-inner > * { opacity: 1; animation: none; }
  .swarm-canvas { display: none; }
}