:root {
  --bg: #04050a;
  --fg: #eceae4;
  --mute: rgba(236, 234, 228, 0.64);
  --dim: rgba(236, 234, 228, 0.4);
  --line: rgba(236, 234, 228, 0.14);
  --cool: #9db9ff;
  --warm: #ffb677;
  --sans: "Inter", "Helvetica Neue", Arial, sans-serif;
  --serif: "Instrument Serif", Georgia, serif;
  --mono: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, monospace;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { background: var(--bg); }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  font-weight: 300;
  line-height: 1.6;
  overflow-x: clip;
  -webkit-font-smoothing: antialiased;
}
img, svg { display: block; max-width: 100%; }
button, input, select { font: inherit; color: inherit; }
button { cursor: pointer; }
a { color: inherit; }
::selection { background: var(--fg); color: var(--bg); }
:focus-visible { outline: 1px solid var(--fg); outline-offset: 4px; }

.defs { position: absolute; width: 0; height: 0; overflow: hidden; }
.skip {
  position: absolute;
  left: 12px;
  top: -48px;
  background: var(--fg);
  color: var(--bg);
  padding: 8px 12px;
  z-index: 80;
  font-family: var(--mono);
  font-size: 0.75rem;
}
.skip:focus { top: 12px; }
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

.mono, .evo-strip span, .footer-label {
  font-family: var(--mono);
  font-weight: 400;
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--mute);
}
p.mono { margin: 0; }

h1, h2, h3 { margin: 0; font-weight: 400; }
h1 {
  font-family: var(--sans);
  font-weight: 300;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  padding-left: 0.22em;
  font-size: clamp(2.6rem, 9vw, 7.5rem);
  line-height: 1;
  background: linear-gradient(180deg, #ffffff 10%, #aeb4c2 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
h2 {
  font-family: var(--serif);
  font-size: clamp(2rem, 4.2vw, 3.8rem);
  line-height: 1.05;
  letter-spacing: -0.01em;
}
h3 { font-size: 1.1rem; font-weight: 400; letter-spacing: 0.01em; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 22px;
  border: 1px solid rgba(236, 234, 228, 0.5);
  border-radius: 999px;
  background: transparent;
  color: var(--fg);
  text-decoration: none;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  transition: background 0.25s ease, color 0.25s ease, border-color 0.25s ease;
}
.btn:hover { background: var(--fg); color: var(--bg); border-color: var(--fg); }
.btn.solid { background: var(--fg); color: var(--bg); border-color: var(--fg); }
.btn.solid:hover { background: transparent; color: var(--fg); }

.top-progress {
  position: fixed;
  inset: 0 0 auto 0;
  height: 2px;
  z-index: 40;
  background: rgba(255, 255, 255, 0.05);
}
.top-progress span {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, rgba(255, 255, 255, 0.2), #fff);
  transform: scaleX(0);
  transform-origin: 0 50%;
}

.rail {
  position: fixed;
  left: 28px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 30;
  width: 96px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s ease;
}
body.in-story .rail { opacity: 1; pointer-events: auto; }
.rail-num {
  margin: 4px 0 0;
  font-family: var(--sans);
  font-weight: 200;
  font-size: 2.6rem;
  line-height: 1;
  letter-spacing: -0.02em;
}
.rail-name {
  margin: 6px 0 14px;
  font-family: var(--mono);
  font-size: 0.64rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mute);
}
.rail-track {
  position: relative;
  display: block;
  width: 2px;
  height: 140px;
  padding: 0;
  border: 0;
  background: rgba(255, 255, 255, 0.14);
}
.rail-track::before { content: ""; position: absolute; inset: 0 -8px; }
.rail-track span {
  position: absolute;
  inset: 0;
  background: #fff;
  transform: scaleY(0);
  transform-origin: top;
}
.rail-progress { margin: 12px 0 0; font-size: 0.6rem; font-variant-numeric: tabular-nums; }

.story { height: 920vh; position: relative; }
.story-sticky {
  position: sticky;
  top: 0;
  height: 100vh;
  height: 100dvh;
  overflow: hidden;
  background: var(--bg);
}
#sky { position: absolute; inset: 0; width: 100%; height: 100%; }
.vignette, .flash { position: absolute; inset: 0; pointer-events: none; }
.vignette {
  background:
    radial-gradient(ellipse at 50% 48%, transparent 40%, rgba(0, 0, 0, 0.6) 100%),
    linear-gradient(180deg, rgba(4, 5, 10, 0.5), transparent 16%, transparent 80%, rgba(4, 5, 10, 0.7));
}
.flash.go { animation: flash 1.1s ease-out; }
@keyframes flash {
  0% { background: radial-gradient(circle at 50% 48%, rgba(255, 244, 225, 0.75), rgba(255, 200, 140, 0.25) 55%, transparent 80%); }
  100% { background: radial-gradient(circle at 50% 48%, rgba(255, 244, 225, 0), transparent 80%); }
}

.hud {
  position: absolute;
  top: 26px;
  z-index: 6;
  margin: 0;
  font-size: 0.64rem;
  pointer-events: none;
}
.hud-tl { left: 28px; }
.hud-tr { right: 28px; text-align: right; }

.intro, .chapter-block, .caption, .evo-wrap, .forge-stage, .scroll-hint, .page-no {
  position: absolute;
  z-index: 5;
}
.intro {
  left: 50%;
  top: 46%;
  width: min(1000px, calc(100% - 160px));
  text-align: center;
  transform: translate(-50%, -54%);
}
.intro-kicker { margin-bottom: 22px !important; }
.tagline {
  margin: 26px auto 0;
  max-width: 34rem;
  font-size: clamp(0.95rem, 1.5vw, 1.1rem);
  color: var(--mute);
}

.chapter-block {
  left: max(136px, 9vw);
  top: 12vh;
  width: min(620px, calc(100% - 180px));
  opacity: 0;
  transform: translateY(10px);
}
[data-scene="bang"] .chapter-block,
[data-scene="cosmos"] .chapter-block,
[data-scene="earth"] .chapter-block,
[data-scene="evo"] .chapter-block {
  opacity: 1;
  transform: none;
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.chapter-block h2 { margin: 14px 0 12px; text-shadow: 0 2px 30px rgba(0, 0, 0, 0.6); }
.chapter-block p:last-child { margin: 0; max-width: 30rem; color: var(--mute); }

.caption {
  left: max(136px, 9vw);
  bottom: 54px;
  width: min(380px, calc(100% - 180px));
  padding-top: 14px;
  border-top: 1px solid var(--line);
  transition: opacity 0.4s ease;
}
.caption p:last-child { margin: 8px 0 0; font-size: 0.98rem; color: var(--fg); }
[data-scene="intro"] .caption { left: 50%; transform: translateX(-50%); text-align: center; bottom: 118px; }
[data-scene="forge"] .caption { opacity: 0; pointer-events: none; }

.page-no {
  right: 28px;
  bottom: 26px;
  margin: 0;
  font-size: 0.68rem;
}

.scroll-hint {
  left: 50%;
  bottom: 30px;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  background: none;
  border: 0;
  transition: opacity 0.4s ease;
}
.scroll-hint i {
  display: block;
  width: 1px;
  height: 34px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.7), transparent);
  transform-origin: top;
  animation: drip 2s ease-in-out infinite;
}
@keyframes drip {
  0% { transform: scaleY(0); opacity: 1; }
  60% { transform: scaleY(1); opacity: 1; }
  100% { transform: scaleY(1); opacity: 0; }
}

.evo-wrap {
  left: 50%;
  top: 56%;
  width: min(1060px, calc(100% - 180px));
  opacity: var(--show, 0);
  transform: translate(-50%, calc(-46% + (1 - var(--show, 0)) * 24px));
  pointer-events: none;
}
.evo-kicker { margin-bottom: 14px !important; text-align: center; }
.evo-strip {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 12px;
}
.evo-strip li {
  position: relative;
  padding: 14px 14px 16px;
  min-height: 180px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: linear-gradient(180deg, rgba(14, 18, 30, 0.6), rgba(6, 8, 14, 0.7));
  backdrop-filter: blur(10px);
  opacity: var(--step, 0);
  transform: translateY(calc((1 - var(--step, 0)) * 18px));
  transition: border-color 0.4s ease;
}
.evo-strip li.on { border-color: rgba(190, 210, 255, 0.45); }
.evo-art { height: 82px; display: grid; place-items: center; margin-bottom: 14px; }
.evo-art svg { width: 118px; height: 78px; filter: drop-shadow(0 0 8px rgba(150, 185, 255, 0.28)); }
.evo-strip strong { display: block; font-weight: 400; font-size: 0.98rem; }
.evo-strip span { display: block; margin-top: 2px; font-size: 0.62rem; }
.evo-strip li.on .fish svg { animation: swim 3s ease-in-out infinite; }
.evo-strip li.on .dino svg { animation: stomp 3.2s ease-in-out infinite; }
.evo-strip li.on .walker svg, .evo-strip li.on .maker svg { animation: bob 2.4s ease-in-out infinite; }
@keyframes swim { 50% { transform: translateX(5px); } }
@keyframes stomp { 50% { transform: translateY(2px); } }
@keyframes bob { 50% { transform: translateY(-3px); } }

.forge-stage {
  inset: 96px 40px 40px max(136px, 9vw);
  display: grid;
  grid-template-columns: minmax(260px, 0.85fr) minmax(320px, 1.15fr);
  gap: 32px;
  align-items: center;
  opacity: var(--show, 0);
  transform: translateY(calc((1 - var(--show, 0)) * 28px));
  pointer-events: none;
}
.forge-stage.on { pointer-events: auto; }
.forge-copy h2 { margin: 14px 0 18px; font-size: clamp(1.9rem, 3.2vw, 3rem); }
.forge-copy > p:not(.mono) { color: var(--mute); max-width: 36rem; }
.forge-points { margin: 0 0 24px; padding: 0; list-style: none; }
.forge-points li {
  padding: 10px 0;
  border-top: 1px solid var(--line);
  font-size: 0.95rem;
}
.forge-points li:last-child { border-bottom: 1px solid var(--line); }
.forge-visual { position: relative; height: min(560px, 72dvh); }

@property --spin { syntax: "<angle>"; inherits: true; initial-value: 0deg; }
.orbit {
  position: absolute;
  left: 50%;
  top: 52%;
  width: 0;
  height: 0;
  animation: orbit-spin 90s linear infinite;
}
.orbit::before {
  content: "";
  position: absolute;
  width: 480px;
  height: 480px;
  left: -240px;
  top: -240px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 50%;
}
@keyframes orbit-spin { to { --spin: 360deg; } }
.arm { position: absolute; left: 0; top: 0; transform: rotate(calc(var(--a) + var(--spin))) translateY(-240px); }
.arm span {
  display: block;
  transform: translate(-50%, -50%) rotate(calc(-1 * (var(--a) + var(--spin))));
  font-family: var(--mono);
  font-size: 0.6rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--dim);
  white-space: nowrap;
}
.arm span::before {
  content: "";
  display: block;
  width: 5px;
  height: 5px;
  margin: 0 auto 6px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.55);
  box-shadow: 0 0 10px rgba(157, 185, 255, 0.7);
}

.window {
  position: absolute;
  left: 50%;
  top: 52%;
  width: min(500px, 88%);
  transform: translate(-50%, -50%);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 12px;
  background: linear-gradient(180deg, rgba(18, 22, 34, 0.78), rgba(8, 10, 16, 0.84));
  backdrop-filter: blur(20px);
  box-shadow: 0 40px 90px rgba(0, 0, 0, 0.65), inset 0 1px 0 rgba(255, 255, 255, 0.08);
  overflow: hidden;
}
.window-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--line);
  font-size: 0.72rem;
  color: var(--mute);
}
.dots { display: flex; gap: 6px; }
.dots i { width: 8px; height: 8px; border-radius: 50%; background: rgba(255, 255, 255, 0.2); }
.window-bar em { font-style: normal; }
.window-bar b { font-weight: 400; color: var(--fg); }
.live { margin-left: auto; font-size: 0.58rem; color: #9fe3b4; }
.window-body { display: grid; grid-template-columns: 86px 1fr 142px; min-height: 252px; }
.window-nav { list-style: none; margin: 0; padding: 12px 8px 12px 14px; border-right: 1px solid var(--line); }
.window-nav li { padding: 7px 0; font-size: 0.76rem; color: var(--dim); }
.window-nav .on { color: var(--fg); }
.window-main { padding: 14px; display: flex; flex-direction: column; gap: 12px; }
.metrics { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.metric { padding: 8px 10px; border: 1px solid var(--line); border-radius: 6px; }
.metric small { display: block; font-size: 0.54rem; }
.metric b { display: block; font-weight: 300; font-size: 1.4rem; line-height: 1.2; font-variant-numeric: tabular-nums; }
.spark { width: 100%; height: 54px; }
.node-row { display: flex; flex-wrap: wrap; gap: 8px; }
.node {
  padding: 7px 10px;
  border: 1px solid var(--line);
  border-radius: 6px;
  font-size: 0.74rem;
}
.node small { display: block; color: var(--dim); font-size: 0.66rem; }
.node.agent { border-color: rgba(157, 185, 255, 0.55); background: rgba(157, 185, 255, 0.08); }
.feed { padding: 12px 14px 12px 12px; border-left: 1px solid var(--line); }
.feed-title { margin-bottom: 8px !important; font-size: 0.56rem; }
.feed ul { list-style: none; margin: 0; padding: 0; }
.feed li { padding: 7px 0; border-bottom: 1px solid var(--line); font-size: 0.7rem; color: var(--mute); }

.ticker {
  border-block: 1px solid var(--line);
  overflow: hidden;
  background: var(--bg);
}
.ticker-track { display: flex; gap: 40px; width: max-content; padding: 14px 0; animation: ticker 40s linear infinite; }
.ticker span::before { content: "+"; margin-right: 40px; color: var(--dim); }
@keyframes ticker { to { transform: translateX(-50%); } }

.block { padding: 130px 8vw; }
.manifesto h2, .section-head h2 { margin: 18px 0 20px; max-width: 18ch; }
.section-head { max-width: 760px; margin-bottom: 56px; }
.section-head p:last-child, .lede { color: var(--mute); font-size: 1.05rem; max-width: 44rem; }

.pillars, .cap-grid, .industry-grid, .gen-grid, .steps {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}
.pillars { grid-template-columns: repeat(3, 1fr); margin-top: 56px; }
.cap-grid { grid-template-columns: repeat(3, 1fr); }
.industry-grid { grid-template-columns: repeat(4, 1fr); }
.steps { grid-template-columns: repeat(5, 1fr); list-style: none; margin: 0; padding: 0; }
.gen-grid { grid-template-columns: repeat(3, 1fr); }
.pillars article, .cap-grid article, .industry-grid article, .steps li, .gen-grid article {
  padding: 34px 28px 38px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.pillars p, .cap-grid p, .industry-grid p, .steps p { color: var(--mute); margin: 12px 0 0; font-size: 0.95rem; }
.pillars .mono, .cap-grid .mono, .steps .mono, .industry-grid .mono { display: block; margin-bottom: 26px; }
.gen-grid ul { margin: 20px 0 0; padding: 0; list-style: none; }
.gen-grid li { padding: 10px 0; border-top: 1px solid var(--line); color: var(--mute); font-size: 0.95rem; }
.gen-grid h3 { margin-top: 10px; font-family: var(--serif); font-size: 2rem; }
.gen-now { background: linear-gradient(180deg, rgba(157, 185, 255, 0.1), transparent 70%); }
.gen-now .mono { color: var(--cool); }
.gen-now li { color: var(--fg); }

.access {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 64px;
  align-items: start;
  background:
    radial-gradient(60% 70% at 85% 10%, rgba(255, 182, 119, 0.1), transparent 70%),
    radial-gradient(50% 60% at 10% 100%, rgba(157, 185, 255, 0.08), transparent 70%);
}
.access-copy h2 { max-width: 14ch; }
.access-copy p:not(.mono) { color: var(--mute); max-width: 30rem; }
.access-copy .btn { margin-top: 18px; }
.access-card {
  display: grid;
  gap: 22px;
  padding: 36px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(10, 12, 20, 0.6);
  backdrop-filter: blur(14px);
}
.access-card h3 { font-family: var(--serif); font-size: 1.9rem; }
.access-card label { display: grid; gap: 8px; }
.access-card input, .access-card select {
  padding: 8px 0 12px;
  border: 0;
  border-bottom: 1px solid var(--line);
  border-radius: 0;
  background: transparent;
  color: var(--fg);
  font-size: 1rem;
}
.access-card select option { background: #0b0d14; }
.access-card input:focus, .access-card select:focus { outline: none; border-color: var(--fg); }
.access-card input::placeholder { color: var(--dim); }
.form-note { min-height: 1.4em; margin: 0; color: var(--cool); font-size: 0.88rem; }

.footer {
  display: grid;
  grid-template-columns: 1.4fr 0.7fr 0.7fr;
  gap: 32px;
  padding: 56px 8vw 32px;
  border-top: 1px solid var(--line);
}
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; margin-bottom: 14px; }
.brand svg { width: 26px; height: 26px; color: var(--fg); }
.brand span { font-weight: 300; letter-spacing: 0.22em; }
.footer p { color: var(--mute); max-width: 26rem; }
.footer a, .footer button {
  display: block;
  padding: 5px 0;
  border: 0;
  background: none;
  color: var(--mute);
  text-align: left;
  text-decoration: none;
  font-size: 0.92rem;
}
.footer a:hover, .footer button:hover { color: var(--fg); }
.footer-label { margin: 0 0 10px !important; }
.legal { grid-column: 1 / -1; margin: 24px 0 0 !important; font-size: 0.64rem; }
.noscript { padding: 16px; background: var(--fg); color: var(--bg); }

.js .reveal { opacity: 0; transform: translateY(26px); }
.js .reveal.in { opacity: 1; transform: none; transition: opacity 0.9s ease, transform 0.9s cubic-bezier(0.2, 0.7, 0.2, 1); }

@media (max-width: 1100px) {
  .cap-grid { grid-template-columns: repeat(2, 1fr); }
  .industry-grid { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 980px) {
  .rail { display: none; }
  .hud-tl { left: 20px; }
  .hud-tr { right: 20px; }
  .intro { width: calc(100% - 48px); }
  .chapter-block { left: 24px; width: calc(100% - 48px); top: 11vh; }
  .caption { left: 24px; width: calc(100% - 48px); bottom: 40px; }
  [data-scene="intro"] .caption { bottom: 108px; width: min(380px, calc(100% - 48px)); }
  .page-no { right: 24px; bottom: 16px; }
  .forge-stage {
    inset: 70px 20px 24px;
    grid-template-columns: 1fr;
    grid-template-rows: auto minmax(240px, 1fr);
    align-content: center;
    gap: 14px;
    overflow: hidden;
  }
  .forge-points, .feed, .orbit { display: none; }
  .forge-copy h2 { font-size: 1.7rem; margin: 10px 0; }
  .forge-copy > p:not(.mono) {
    margin: 0 0 10px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }
  .forge-visual { height: 100%; min-height: 240px; }
  .window { width: min(100%, 560px); }
  .window-body { grid-template-columns: 1fr; min-height: 0; }
  .window-nav { display: flex; gap: 16px; border-right: 0; border-bottom: 1px solid var(--line); padding: 8px 14px; }
  .evo-wrap { width: calc(100% - 36px); top: 60%; }
  .pillars, .gen-grid, .access, .footer { grid-template-columns: 1fr; }
  .access { gap: 40px; }
  .block { padding: 90px 7vw; }
}
@media (max-width: 680px) {
  .cap-grid, .industry-grid, .steps { grid-template-columns: 1fr; }
  .evo-strip { grid-template-columns: repeat(5, minmax(112px, 1fr)); overflow-x: auto; }
  .story { height: 760vh; }
  .hud-tl { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}