:root {
  color-scheme: dark;
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --page: #100d17;
  --surface: #181321;
  --surface-raised: #21192d;
  --line: rgba(255, 255, 255, 0.11);
  --text: #f8f5fb;
  --muted: #aaa2b5;
  --core: #4f259d;
  --signal: #b48bf6;
  --success: #d7bcff;
  --cream: #f2ece1;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background:
    radial-gradient(circle at 78% 8%, rgba(101, 51, 183, 0.21), transparent 28rem),
    var(--page);
  color: var(--text);
}
a { color: inherit; text-decoration: none; }
button, a { -webkit-tap-highlight-color: transparent; }

.topbar {
  position: sticky;
  z-index: 20;
  top: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  padding: 0 5vw;
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--page) 84%, transparent);
  backdrop-filter: blur(18px);
}
.brand { display: flex; align-items: center; gap: 12px; font-weight: 700; letter-spacing: -0.02em; }
.brand-mark {
  display: grid; place-items: center; width: 34px; height: 34px; border-radius: 11px;
  background: var(--core); color: white; font-size: 15px;
}
nav { display: flex; gap: 28px; color: var(--muted); font-size: 14px; }
nav a:hover, nav a:focus-visible { color: var(--text); }

main, footer { width: min(1180px, 90vw); margin-inline: auto; }
.hero {
  min-height: 700px;
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(360px, .9fr);
  gap: clamp(48px, 8vw, 112px);
  align-items: center;
  padding: 88px 0 112px;
}
.eyebrow { margin: 0 0 14px; color: var(--signal); font-size: 12px; font-weight: 750; letter-spacing: .13em; text-transform: uppercase; }
h1, h2, h3, p { text-wrap: pretty; }
h1 { max-width: 720px; margin: 0; font-size: clamp(44px, 6vw, 78px); line-height: .98; letter-spacing: -.055em; }
.lede { max-width: 680px; margin: 30px 0 0; color: #c8c1ce; font-size: clamp(17px, 2vw, 21px); line-height: 1.55; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 36px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 50px; padding: 0 21px; border-radius: 999px; font-size: 14px; font-weight: 700; transition: transform .2s ease, background .2s ease; }
.button:hover { transform: translateY(-2px); }
.button-primary { background: var(--signal); color: #1b102a; }
.button-secondary { border: 1px solid var(--line); background: rgba(255,255,255,.055); }
.scope-note { max-width: 590px; margin: 20px 0 0; color: #847c8c; font-size: 12px; line-height: 1.6; }

.companion-stage {
  position: relative;
  min-height: 520px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 40px;
  background: linear-gradient(160deg, rgba(255,255,255,.065), rgba(255,255,255,.018));
  box-shadow: 0 30px 100px rgba(0,0,0,.28);
}
.companion-stage::before { content: ""; position: absolute; width: 320px; height: 320px; border-radius: 50%; background: rgba(180,139,246,.13); filter: blur(60px); }
.stage-copy { position: absolute; inset: 28px 30px auto; display: flex; justify-content: space-between; color: #8c8494; font: 600 11px/1 ui-monospace, SFMono-Regular, Menlo, monospace; text-transform: uppercase; letter-spacing: .12em; }
.companion { position: relative; width: min(80%, 330px); overflow: visible; filter: drop-shadow(0 26px 38px rgba(34,14,68,.58)); transition: filter .35s ease; }
.companion > circle { fill: var(--core); transition: r .35s cubic-bezier(.22,1,.36,1); }
.preview-eyes rect { fill: var(--cream); transform-box: fill-box; transform-origin: center; transition: x .35s ease, y .35s ease, width .35s ease, height .35s ease, transform .35s ease; }
.companion.is-output { filter: drop-shadow(0 0 30px rgba(180,139,246,.5)) drop-shadow(0 26px 38px rgba(34,14,68,.48)); }
.companion.is-complete { filter: drop-shadow(0 0 30px rgba(215,188,255,.62)); }
.stage-status { position: absolute; inset: auto 28px 28px; display: flex; align-items: center; gap: 13px; padding: 15px 18px; border: 1px solid var(--line); border-radius: 18px; background: rgba(16,13,23,.68); backdrop-filter: blur(12px); }
.stage-status div { display: grid; gap: 4px; }
.stage-status strong { font-size: 14px; }
.stage-status span:not(.live-dot) { color: var(--muted); font-size: 12px; }
.live-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--signal); box-shadow: 0 0 0 5px rgba(180,139,246,.12); }

.section { padding: 112px 0; border-top: 1px solid var(--line); }
.section-heading { display: grid; grid-template-columns: minmax(0,1.3fr) minmax(260px,.7fr); gap: 64px; align-items: end; margin-bottom: 48px; }
h2 { max-width: 720px; margin: 0; font-size: clamp(36px, 5vw, 60px); line-height: 1.02; letter-spacing: -.045em; }
.section-heading > p { margin: 0; color: var(--muted); line-height: 1.65; }

.state-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 12px; }
.state-card {
  appearance: none;
  width: 100%;
  min-height: 188px;
  padding: 23px;
  border: 1px solid var(--line);
  border-radius: 24px;
  display: grid;
  grid-template-columns: 54px 1fr auto;
  gap: 18px;
  align-items: start;
  text-align: left;
  color: var(--text);
  background: rgba(255,255,255,.025);
  cursor: pointer;
  transition: border-color .2s ease, background .2s ease, transform .2s ease;
}
.state-card:hover { transform: translateY(-2px); background: rgba(255,255,255,.045); }
.state-card[aria-pressed="true"] { border-color: var(--signal); background: rgba(180,139,246,.09); }
.state-mini { width: 54px; height: 54px; padding: 6px; border-radius: 17px; background: rgba(180,139,246,.09); }
.state-mini circle { fill: var(--core); }
.state-mini rect { fill: var(--cream); }
.state-card-copy { min-width: 0; }
.state-card-copy h3 { margin: 2px 0 7px; font-size: 19px; letter-spacing: -.025em; }
.state-card-copy p { margin: 0 0 18px; color: var(--muted); font-size: 13px; line-height: 1.5; }
.state-meta { display: flex; flex-wrap: wrap; gap: 7px; }
.state-meta span { padding: 6px 8px; border-radius: 8px; background: rgba(255,255,255,.055); color: #bdb5c6; font: 600 10px/1 ui-monospace, SFMono-Regular, Menlo, monospace; }
.state-index { color: #756d7e; font: 600 11px/1 ui-monospace, SFMono-Regular, Menlo, monospace; }

.contract { border-top-color: rgba(180,139,246,.25); }
.axis-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
.axis-card { position: relative; min-height: 230px; padding: 28px; overflow: hidden; border: 1px solid var(--line); border-radius: 28px; background: var(--surface); }
.axis-card h3, .flow-card h3, .rules-grid h3 { margin: 22px 0 10px; font-size: 25px; letter-spacing: -.035em; }
.axis-card p, .rules-grid p { color: var(--muted); font-size: 14px; line-height: 1.6; }
.axis-card code { position: absolute; inset: auto 28px 26px; color: var(--signal); font-size: 12px; }
.axis-number { color: #756c80; font: 600 11px/1 ui-monospace, SFMono-Regular, Menlo, monospace; }
.axis-featured { background: var(--core); }
.axis-featured p, .axis-featured .axis-number { color: rgba(255,255,255,.72); }
.axis-featured code { color: white; }
.flow-card { margin-top: 12px; padding: 30px; border: 1px solid var(--line); border-radius: 28px; background: var(--surface); }
.flow-heading { display: flex; align-items: start; justify-content: space-between; }
.flow-heading h3 { margin-top: 0; }
.flow-note { padding: 7px 10px; border-radius: 999px; background: rgba(180,139,246,.1); color: var(--signal); font-size: 11px; font-weight: 700; }
.flow { display: grid; grid-template-columns: repeat(5, 1fr); gap: 8px; margin: 28px 0 0; padding: 0; list-style: none; }
.flow li { position: relative; min-height: 108px; padding: 15px; border-radius: 17px; background: rgba(255,255,255,.045); }
.flow li::after { content: "→"; position: absolute; top: 44px; right: -10px; z-index: 1; color: var(--signal); }
.flow li:last-child::after { display: none; }
.flow li span { display: block; color: #797181; font: 600 10px/1 ui-monospace, SFMono-Regular, Menlo, monospace; }
.flow li strong, .flow li small { display: block; }
.flow li strong { margin-top: 20px; font-size: 13px; }
.flow li small { margin-top: 5px; color: var(--muted); }
.rules-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 12px; }
.rules-grid article { padding: 28px; border: 1px solid var(--line); border-radius: 28px; background: rgba(255,255,255,.025); }
.rules-grid h3 { margin-top: 0; }
.rules-grid code { color: var(--success); }

.package-download { display: grid; grid-template-columns: auto 1fr auto; gap: 18px; align-items: center; padding: 24px; border-radius: 24px; background: var(--signal); color: #190d27; transition: transform .2s ease; }
.package-download:hover { transform: translateY(-2px); }
.package-icon { display: grid; place-items: center; width: 48px; height: 48px; border-radius: 16px; background: rgba(25,13,39,.12); font-size: 24px; }
.package-download span:nth-child(2) { display: grid; gap: 5px; }
.package-download strong { font-size: 18px; }
.package-download small { opacity: .72; }
.package-arrow { font-size: 22px; }
.file-list { display: grid; grid-template-columns: repeat(2,1fr); gap: 12px; margin-top: 12px; }
.file-list a { min-height: 108px; display: grid; grid-template-columns: 52px 1fr; gap: 17px; align-items: center; padding: 20px; border: 1px solid var(--line); border-radius: 22px; background: rgba(255,255,255,.025); transition: background .2s ease, border-color .2s ease; }
.file-list a:hover { background: rgba(255,255,255,.05); border-color: rgba(180,139,246,.42); }
.file-type { display: grid; place-items: center; width: 52px; height: 52px; border-radius: 15px; background: rgba(180,139,246,.1); color: var(--signal); font: 700 10px/1 ui-monospace, SFMono-Regular, Menlo, monospace; }
.file-list a > span:last-child { display: grid; gap: 7px; }
.file-list strong { font-size: 14px; }
.file-list small { color: var(--muted); line-height: 1.45; }

footer { display: flex; justify-content: space-between; padding: 32px 0 48px; border-top: 1px solid var(--line); color: #7e7686; font-size: 12px; }
footer a { color: var(--signal); }

:focus-visible { outline: 2px solid var(--signal); outline-offset: 4px; }
@media (max-width: 800px) {
  nav { display: none; }
  .hero { grid-template-columns: 1fr; padding-top: 64px; }
  .companion-stage { min-height: 440px; }
  .section-heading { grid-template-columns: 1fr; gap: 20px; }
  .state-grid, .file-list, .rules-grid { grid-template-columns: 1fr; }
  .axis-grid { grid-template-columns: 1fr; }
  .flow { grid-template-columns: 1fr; }
  .flow li { min-height: 80px; }
  .flow li::after { top: auto; right: auto; bottom: -12px; left: 50%; transform: rotate(90deg); }
}
@media (max-width: 520px) {
  main, footer { width: min(100% - 32px, 1180px); }
  .topbar { padding-inline: 16px; }
  .brand { font-size: 14px; }
  h1 { font-size: 44px; }
  .hero-actions .button { width: 100%; }
  .companion-stage { min-height: 390px; border-radius: 30px; }
  .state-grid { grid-template-columns: 1fr; }
  .state-card { grid-template-columns: 48px 1fr; padding: 18px; }
  .state-index { display: none; }
  .package-download { grid-template-columns: auto 1fr; }
  .package-arrow { display: none; }
  footer { gap: 16px; flex-direction: column; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}