@font-face { font-family: 'Perfectly Nineties'; src: url('/assets/perfectly-nineties-regular.woff') format('woff'); font-style: normal; font-weight: 400; font-display: swap; }
@font-face { font-family: 'Suisse Intl'; src: url('/assets/suisse-intl-light.woff2') format('woff2'); font-style: normal; font-weight: 300; font-display: swap; }
@font-face { font-family: 'Suisse Intl'; src: url('/assets/suisse-intl-regular.woff2') format('woff2'); font-style: normal; font-weight: 400; font-display: swap; }
@font-face { font-family: 'Suisse Intl'; src: url('/assets/suisse-intl-medium.woff2') format('woff2'); font-style: normal; font-weight: 500; font-display: swap; }
@font-face { font-family: 'FK Raster Grotesk Compact Blended'; src: url('/assets/fk-raster-grotesk-compact-blended.woff2') format('woff2'); font-style: normal; font-weight: 400; font-display: swap; }
@layer reset, base, layout, components, responsive;
@layer reset {
  *, *::before, *::after { box-sizing: border-box; min-width: 0; }
  body, h1, h2, h3, p, figure { margin: 0; }
  img, svg { display: block; max-width: 100%; }
  button, input { font: inherit; }
  [hidden] { display: none !important; }
}
@layer base {
  :root { color-scheme: light; --paper: #f3f2ee; --light: #fcfbf8; --ink: #000000; --muted: #565656; --accent: #000000; --accent-dark: #303030; --line: #cececa; --soft: #e7e6e2; --panel-ink: #171717; --status-ink: #454545; --mono: 'Cascadia Mono', Consolas, monospace; --serif: 'Iowan Old Style', 'Palatino Linotype', 'Book Antiqua', Georgia, serif; --sans: Aptos, 'Segoe UI', Arial, sans-serif; }
  html { scroll-behavior: smooth; scroll-padding-top: 7rem; }
  body { background: var(--paper); color: var(--ink); font: 1.125rem/1.6 var(--sans); -webkit-font-smoothing: antialiased; overflow-wrap: anywhere; }
  a { color: inherit; text-underline-offset: .25em; }
  a:hover { color: var(--accent); }
  a:focus-visible, button:focus-visible, summary:focus-visible, [role="tabpanel"]:focus-visible { outline: 3px solid var(--accent); outline-offset: 5px; }
  ::selection { background: #d4d4d0; color: var(--ink); }
  h1, h2, h3 { font-family: var(--serif); font-weight: 400; line-height: 1.04; letter-spacing: .005em; text-wrap: balance; }
  h1 { font-size: clamp(3rem, 7.8vw, 7rem); }
  h2 { font-size: clamp(2.25rem, 4.4vw, 4rem); }
  h3 { font-size: clamp(1.875rem, 3vw, 2.625rem); }
  h1 em, h2 em { font-weight: 400; color: var(--accent); }
  p { text-wrap: pretty; }
  .wrap { width: min(100% - 3rem, 80rem); margin-inline: auto; }
  .mono, .eyebrow, .mini-label, .chapter-label { font-family: var(--mono); font-size: .8125rem; line-height: 1.6; letter-spacing: .025em; }
  .text-link { display: inline-flex; align-items: center; gap: 1rem; min-height: 3rem; font-size: .9375rem; font-weight: 600; }
  .skip-link { position: absolute; top: .5rem; left: 1rem; z-index: 10; transform: translateY(-180%); background: var(--light); border: 2px solid var(--ink); padding: .75rem 1rem; }
  .skip-link:focus { transform: translateY(0); }
  @media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } *, *::before, *::after { animation: none !important; transition: none !important; } }
}
@layer layout {
  .site-header { position: sticky; top: .5rem; z-index: 5; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: .5rem 1rem; margin-top: .5rem; padding: .5rem 0; background: var(--paper); border-bottom: 1px solid var(--ink); }
  .wordmark { display: inline-flex; align-items: center; gap: 0; min-height: 3rem; font: 400 1.6rem var(--serif); letter-spacing: .02em; text-decoration: none; }
  .wordmark img { margin-right: .6rem; }
  .wordmark-dot { color: var(--accent); margin-left: 0; }
  nav { display: flex; flex-wrap: wrap; gap: .25rem 1.75rem; }
  nav a { display: inline-flex; align-items: center; min-height: 3rem; font-size: .9375rem; text-decoration: none; }
  .desktop-nav { display: none; }
  .nav-guide { border: 1px solid var(--line); padding-inline: 1rem; gap: .6rem; }
  .hero { padding-top: 3.5rem; }
  .hero-copy { text-align: center; }
  .hero h1 { max-width: 18ch; margin: 1.2rem auto 1.5rem; }
  .hero-description { max-width: 42rem; margin-inline: auto; color: var(--muted); }
  .hero-actions { display: flex; justify-content: center; align-items: center; flex-wrap: wrap; gap: .75rem 1.75rem; margin-top: 1.75rem; }
  .build-note { max-width: 42rem; margin: 1rem auto 0; font: .8125rem/1.65 var(--mono); color: var(--muted); }
  .hero-visual { width: min(100%, 100rem); margin: 3rem auto 0; }
  .hero-visual picture { display: block; aspect-ratio: 4/5; overflow: hidden; background: #d0d0cc; }
  .hero-visual img { width: 100%; height: 100%; object-fit: cover; }
  .hero-visual figcaption { display: flex; justify-content: space-between; flex-wrap: wrap; gap: .25rem 1rem; padding: 1rem 1.5rem; color: var(--muted); font: .8125rem/1.6 var(--mono); }
  .message-scene { margin-top: 2rem; padding-block: 4.5rem; background: var(--panel-ink); color: var(--paper); }
  .scene-heading { display: grid; gap: 1.5rem; margin-bottom: 3rem; }
  .scene-heading h2 { max-width: 15ch; }
  .scene-heading h2 em { color: #deded9; }
  .scene-heading > p { max-width: 35rem; color: #cacaca; }
  .message-stage { display: grid; gap: 2.5rem; }
  .message-art { order: 1; align-self: center; }
  .message-art img { width: 100%; height: auto; aspect-ratio: 1.25; object-fit: cover; }
  .message-art figcaption { margin-top: 1rem; color: #cacaca; font: .8125rem/1.6 var(--mono); }
  .owner-scene { display: grid; gap: 2.5rem; padding-block: 4.5rem; }
  .owner-intro { max-width: 33rem; }
  .owner-intro h2 { max-width: 10ch; margin-block: 1rem 1.5rem; }
  .owner-intro > p:not(.chapter-label) { color: var(--muted); }
  .owner-intro .text-link { margin-top: 1rem; }
  .owner-rules { border-top: 1px solid var(--ink); }
  .choices-scene { padding-block: 4.5rem; background: var(--soft); border-block: 1px solid var(--line); }
  .choices-intro { max-width: 44rem; }
  .choices-intro > p { margin-top: 1.5rem; color: var(--muted); }
  .build-scene { padding-block: 4.5rem; }
  .build-intro { max-width: 48rem; }
  .build-intro h2 { margin-block: 1rem 1.5rem; }
  .build-intro > p:not(.chapter-label) { max-width: 40rem; color: var(--muted); }
  .build-intro .button { margin-top: 1.75rem; }
  .closing { padding-block: 4rem; border-top: 1px solid var(--ink); }
  .closing > h2 { max-width: 19ch; font-size: clamp(2.5rem, 5.6vw, 5.25rem); }
  .closing-bottom { display: grid; gap: 2rem; margin-top: 2.5rem; }
  .closing-bottom > div:first-child { max-width: 34rem; color: var(--muted); }
  .closing-signature { margin-top: 1.5rem; font: italic 1.5rem var(--serif); color: var(--accent); }
  .site-footer { display: flex; flex-wrap: wrap; align-items: center; gap: 1.5rem; padding-block: 2rem; border-top: 1px solid var(--line); }
  .site-footer > p { font: italic 1.2rem var(--serif); }
  .site-footer > span { color: var(--muted); font-size: .875rem; }
  .site-footer nav { flex-basis: 100%; padding-top: 1rem; border-top: 1px solid var(--line); }
}
@layer components {
  .button { display: inline-flex; align-items: center; justify-content: space-between; gap: 1.5rem; min-height: 3rem; padding: .7rem 1.1rem; border: 1px solid var(--ink); border-radius: 2px; box-shadow: 3px 3px 0 var(--ink); text-decoration: none; font-size: .9375rem; font-weight: 600; transition: transform .16s ease-out, box-shadow .16s ease-out, background-color .16s ease-out; }
  .button-accent { background: var(--accent); color: var(--light); }
  @media (hover: hover) and (pointer: fine) { .button:hover { color: var(--light); background: var(--accent-dark); transform: translate(1px, 1px); box-shadow: 2px 2px 0 var(--ink); } }
  .button:active { transform: translate(3px, 3px); box-shadow: none; background: var(--accent-dark); }
  .hero-copy > * { animation: arrive .5s cubic-bezier(.2,.65,.3,1) both; }
  .hero-copy > :nth-child(2) { animation-delay: 80ms; }
  .hero-copy > :nth-child(3) { animation-delay: 160ms; }
  .hero-copy > :nth-child(4) { animation-delay: 240ms; }
  .hero-copy > :nth-child(5) { animation-delay: 320ms; }
  .hero-visual { animation: landscape .7s ease-out both; }
  .hero.motion-paused .hero-copy > *, .hero.motion-paused .hero-visual { animation-play-state: paused; }
  @keyframes arrive { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }
  @keyframes landscape { from { opacity: .8; } to { opacity: 1; } }
  .line-tabs { display: flex; flex-wrap: wrap; gap: .75rem; margin-bottom: 2rem; }
  .line-tabs button { display: inline-flex; align-items: center; justify-content: space-between; gap: 1.5rem; min-height: 3rem; padding: .65rem 1rem; border: 1px solid #a0a0a0; border-radius: 2px; color: var(--paper); background: transparent; font-size: .9375rem; cursor: pointer; }
  .line-tabs button[aria-selected="true"] { color: var(--ink); background: var(--paper); border-color: var(--paper); box-shadow: 0 3px 0 #aaaaa5; }
  @media (hover: hover) and (pointer: fine) { .line-tabs button:hover { background: #303030; } .line-tabs button[aria-selected="true"]:hover { color: var(--ink); background: #e2e2dc; } }
  .line-tabs button:active { transform: translateY(1px); box-shadow: none; }
  .message-scene :is(button, a, [role="tabpanel"]):focus-visible { outline-color: var(--paper); }
  .line-card h3 { max-width: 19ch; margin-bottom: 1.5rem; }
  .line-card + .line-card:not([hidden]) { margin-top: 3rem; padding-top: 3rem; border-top: 1px solid #696969; }
  .line-tabs:not([hidden]) ~ .line-card { margin-top: 0; padding-top: 0; border: 0; }
  .call-path { list-style: none; margin: 0; padding: 0; }
  .call-path li { padding-block: 1rem; border-top: 1px solid #696969; }
  .call-path .mini-label { color: #deded9; }
  .call-path p { margin-top: .5rem; font-size: 1rem; max-width: 34rem; }
  .example-limit { color: #cacaca; font: .8125rem/1.65 var(--mono); margin-top: 1rem; }
  details { border-bottom: 1px solid var(--line); }
  summary { cursor: pointer; min-height: 3rem; padding: 1.2rem .75rem 1.2rem 0; font-weight: 600; font-size: 1.125rem; }
  details p { max-width: 43rem; color: var(--muted); padding-bottom: 1.25rem; font-size: 1rem; }
  .owner-rules summary { font-family: var(--serif); font-weight: 400; font-size: clamp(1.6rem, 2.6vw, 2rem); }
  .owner-rules .text-link { margin-bottom: 1rem; }
  .model-steps { display: grid; gap: 0; list-style: none; padding: 0; margin: 3.5rem 0 2.5rem; }
  .model-steps li { position: relative; padding: 0 0 2.5rem 2rem; border-left: 2px solid var(--accent); }
  .cord-node { position: absolute; width: .8rem; height: .8rem; border: 2px solid var(--accent); border-radius: 50%; background: var(--soft); left: -.45rem; top: .3rem; }
  .model-steps .mono { color: var(--accent); }
  .model-steps strong { display: block; margin-block: 1rem; font: 400 clamp(2.5rem, 4.7vw, 4.25rem)/1 var(--serif); letter-spacing: .005em; }
  .model-steps p { max-width: 23rem; color: var(--muted); font-size: 1rem; }
  .model-boundary { max-width: 54rem; padding-top: 1.5rem; border-top: 1px solid var(--line); font-size: 1rem; color: var(--muted); }
  .model-boundary .text-link { margin-top: .75rem; }
  .build-details { margin-top: 3rem; border-block: 1px solid var(--ink); }
  .build-details > summary { display: list-item; padding-block: 1.5rem; }
  .build-details > summary .mono { display: block; margin-top: .25rem; font-weight: 400; color: var(--muted); }
  .ledger-intro { padding-top: .5rem; }
  .roadmap-window { border: 1px solid var(--ink); background: var(--light); }
  .window-bar { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: .5rem 1rem; padding: .25rem 1rem; border-bottom: 1px solid var(--line); font: .8125rem/1.6 var(--mono); }
  .snapshot-link { display: inline-flex; align-items: center; gap: .5rem; min-height: 3rem; }
  .snapshot-time { padding: 1rem; color: var(--muted); border-bottom: 1px solid var(--line); font: .8125rem/1.6 var(--mono); }
  .roadmap-stage { padding: 1.5rem 1rem; border-bottom: 1px solid var(--line); }
  .roadmap-stage:last-child { border: 0; }
  .stage-top { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: .5rem 1rem; }
  .stage-top h3 { font: 600 1rem var(--sans); letter-spacing: 0; }
  .stage-state { font: .8125rem var(--mono); color: var(--muted); }
  .roadmap-tasks { display: grid; gap: .9rem; list-style: none; margin: 1.25rem 0 0; padding: 0; }
  .roadmap-tasks li { display: flex; align-items: start; justify-content: space-between; flex-wrap: wrap; gap: .35rem 1rem; font-size: .9375rem; }
  .task-state { display: flex; align-items: center; gap: .5rem; color: var(--muted); font-size: .8125rem; }
  .key-dot { display: inline-block; flex: none; width: .45rem; height: .45rem; background: var(--muted); }
  .key-dot.local { background: var(--status-ink); border-radius: 50%; }
  .key-dot.fixture { background: #696969; }
  .key-dot.external { background: var(--accent); transform: rotate(45deg); }
  .key-dot.pending { border: 1px solid var(--muted); background: transparent; border-radius: 50%; }
  .status-key { display: flex; flex-wrap: wrap; gap: .75rem 1.5rem; margin-top: 1.5rem; font-size: .8125rem; color: var(--muted); }
  .status-key > span { display: flex; align-items: center; gap: .5rem; }
  .roadmap-footnote { margin-top: 1rem; font-size: .875rem; }
  .roadmap-unavailable { padding: 2rem; }
  .roadmap-unavailable h3 { margin-bottom: 1rem; font-size: 1.75rem; }
  .guide-links { border-top: 1px solid var(--line); }
  .guide-links a { display: flex; align-items: center; justify-content: space-between; gap: 1rem; min-height: 3rem; padding-block: 1rem; border-bottom: 1px solid var(--line); text-decoration: none; }
  .guide-links a > span:last-child { color: var(--accent); }
  .faq { max-width: 44rem; margin-top: 3rem; }
  .faq summary { font-size: 1rem; }
  .mobile-menu { border: 0; }
  .mobile-menu summary { display: flex; align-items: center; justify-content: space-between; gap: 1rem; min-height: 3rem; padding: .5rem; font-size: 1rem; }
  .mobile-menu summary::marker { content: ''; }
  .mobile-menu nav { position: absolute; right: 0; top: calc(100% + .5rem); width: min(20rem, 100%); padding: .75rem 1rem; display: grid; gap: .25rem; border: 1px solid var(--ink); background: var(--paper); box-shadow: 3px 3px 0 #d3d3ce; max-height: 65vh; overflow: auto; }
  .mobile-menu nav a { font-size: 1rem; border-bottom: 1px solid var(--line); }
  .doc { max-width: 48rem; padding-block: 3rem 5rem; }
  .doc h1 { font-size: clamp(2.6rem, 6vw, 4.2rem); margin: 1rem 0 1.5rem; }
  .doc h2 { font-size: 1.8rem; margin: 2.5rem 0 1rem; }
  .doc p, .doc ul, .doc ol { margin-block: 1rem; }
  .doc li { margin-block: .5rem; }
  .doc-callout { padding: 1.25rem 1.5rem; background: var(--soft); border-left: 3px solid var(--accent); }
}
@layer responsive {
  @media (max-width: 359px) { .wrap { width: calc(100% - 2.5rem); } .hero-actions { align-items: stretch; flex-direction: column; } .hero-actions .text-link { justify-content: center; } }
  @media (min-width: 48rem) {
    .wrap { width: min(100% - 4rem, 80rem); }
    .hero { padding-top: 4.5rem; }
    .hero-visual { width: min(100% - 4rem, 100rem); margin-top: 3.5rem; }
    .hero-visual picture { aspect-ratio: 2.35; }
    .hero-visual figcaption { padding-inline: 0; }
    .message-scene, .choices-scene { padding-block: 6rem; }
    .owner-scene { grid-template-columns: 1fr 1.1fr; gap: 5rem; padding-block: 7rem; }
    .model-steps { grid-template-columns: repeat(3, 1fr); gap: 2.5rem; }
    .model-steps li { border-left: 0; border-top: 2px solid var(--accent); padding: 2rem 0 0; }
    .model-steps li:not(:last-child)::after { content: ''; position: absolute; top: -2px; right: -2.5rem; width: 2.5rem; border-top: 2px solid var(--accent); }
    .cord-node { top: -.45rem; left: 0; }
    .build-scene { padding-block: 7rem; }
    .closing { padding-block: 6rem; }
    .closing-bottom { grid-template-columns: 1fr 1fr; gap: 5rem; margin-top: 3rem; }
    .site-footer > span { margin-left: auto; }
  }
  @media (min-width: 64rem) {
    .desktop-nav { display: flex; }
    .mobile-menu { display: none; }
    .scene-heading { grid-template-columns: 1.1fr 1fr; gap: 5rem; align-items: end; margin-bottom: 4rem; }
    .message-stage { grid-template-columns: 1.15fr 1fr; gap: 5rem; align-items: center; }
    .message-art { order: 0; }
    .message-art img { aspect-ratio: 1.25; }
    .roadmap-tasks { grid-template-columns: 1fr 1fr; gap: 1rem 3rem; }
    .roadmap-stage { padding-inline: 2rem; }
  }
}

@layer responsive {
  /* Retro editorial: framed scenes and printed call notes. */
  .site-header { padding: 0; border: 1px solid var(--ink); box-shadow: 3px 3px 0 var(--ink); }
  .site-header .wordmark { padding: .5rem .8rem; }
  .desktop-nav { gap: 0; align-self: stretch; }
  .desktop-nav a { padding-inline: 1.25rem; border-left: 1px solid var(--ink); font-family: var(--mono); font-size: .8125rem; }
  .desktop-nav .nav-guide { border-block: 0; border-right: 0; background: var(--soft); }
  .mobile-menu > summary { border-left: 1px solid var(--ink); padding-inline: 1rem; font-family: var(--mono); font-size: .875rem; }
  .hero { width: min(100% - 3rem, 96rem); margin: 2rem auto 0; padding: 0; border: 1px solid var(--ink); box-shadow: 6px 6px 0 var(--ink); background: var(--light); }
  .scene-bar, .note-bar { display: flex; flex-wrap: wrap; justify-content: space-between; gap: .4rem 1rem; padding: .65rem 1rem; font: .8125rem/1.5 var(--mono); border-bottom: 1px solid var(--ink); background: var(--soft); color: var(--ink); }
  .scene-bar { background: var(--ink); color: var(--paper); }
  .hero-copy { padding-block: 3.5rem 2.5rem; }
  .hero h1 { font-weight: 400; letter-spacing: .005em; }
  .hero .eyebrow { display: inline-block; padding: .25rem .6rem; border: 1px solid var(--ink); }
  .hero-visual { width: 100%; margin-top: 0; border-top: 1px solid var(--ink); }
  .hero-visual picture { position: relative; }
  .hero-visual picture::after, .message-art::after { content: ''; position: absolute; inset: 0; pointer-events: none; background-image: radial-gradient(circle, rgb(0 0 0 / .34) .6px, transparent .85px); background-size: 3px 3px; opacity: .38; mix-blend-mode: multiply; }
  .hero-visual img, .message-art img { filter: grayscale(1) contrast(1.06); }
  .hero-visual figcaption { padding: .8rem 1rem; border-top: 1px solid var(--ink); background: var(--paper); }
  .message-scene { margin-top: 4rem; border-block: 1px solid var(--ink); }
  .message-scene h2 { font-weight: 600; }
  .message-art { position: relative; border: 1px solid var(--paper); padding: .5rem; box-shadow: 6px 6px 0 #080808; }
  .message-art::after { bottom: 3rem; }
  .message-art figcaption { position: relative; padding: .5rem .25rem 0; margin-top: .25rem; }
  .line-examples { background: var(--paper); color: var(--ink); border: 1px solid var(--ink); box-shadow: 6px 6px 0 #080808; }
  .line-tabs { gap: 0; margin: 0; border-bottom: 1px solid var(--ink); }
  .line-tabs button { flex: 1; border: 0; border-radius: 0; color: var(--ink); background: var(--soft); font: .8125rem var(--mono); box-shadow: inset 0 -3px var(--line); }
  .line-tabs button + button { border-left: 1px solid var(--ink); }
  .line-tabs button[aria-selected="true"] { color: var(--light); background: var(--accent); border-color: var(--ink); box-shadow: inset 0 -3px var(--accent-dark); }
  .line-card { padding: 1.5rem; }
  .line-tabs:not([hidden]) ~ .line-card { padding: 1.5rem; }
  .line-card h3 { font-weight: 600; }
  .call-path li { border-top-color: var(--line); }
  .call-path .mini-label { color: var(--accent); }
  .example-limit { color: var(--muted); border-top: 1px dashed var(--line); padding-top: 1rem; }
  .line-examples :is(button, a, [role="tabpanel"]):focus-visible { outline-color: var(--accent); outline-offset: 4px; }
  .line-tabs button:focus-visible { outline-offset: -6px; outline-color: var(--ink); }
  @media (hover: hover) and (pointer: fine) { .line-tabs button:hover { color: var(--ink); background: #dcdcd6; } .line-tabs button[aria-selected="true"]:hover { color: var(--light); background: var(--accent-dark); } .desktop-nav a:hover { color: var(--light); background: var(--ink); } }
  @media (max-width: 359px) { .hero { width: calc(100% - 2.5rem); } .hero-copy { width: calc(100% - 2rem); } .scene-bar { font-size: .75rem; } }
  @media (min-width: 48rem) { .hero { width: min(100% - 4rem, 96rem); } .hero-copy { padding-block: 4rem 3rem; } .hero-visual { width: 100%; } }
}

@layer responsive {
  /* A paper folio, a continuous signal strip, and a sober build ledger. */
  .owner-intro h2, .choices-intro h2, .build-intro h2, .closing > h2 { font-weight: 600; }
  .chapter-label { display: inline-block; padding-bottom: .4rem; border-bottom: 1px solid var(--ink); }
  .owner-rules { align-self: start; border: 1px solid var(--ink); background: var(--light); }
  .owner-rules details { padding-inline: 1.25rem; border-color: var(--ink); }
  .owner-rules details:last-child { border-bottom: 0; }
  .owner-rules details[open] { background: var(--paper); }
  .owner-rules summary { padding-block: 1.4rem; }
  .choices-scene { border-color: var(--ink); }
  .model-steps { border: 1px solid var(--ink); background: var(--paper); }
  .model-steps li { padding: 1.75rem 1.5rem 1.75rem 2rem; border-left: 3px solid var(--accent); }
  .model-steps li + li { border-top: 1px solid var(--ink); }
  .model-steps li:not(:last-child)::after { content: none; }
  .cord-node { width: .7rem; height: .7rem; left: -.45rem; top: 2.05rem; border-radius: 0; background: var(--paper); }
  .model-steps strong { font-weight: 600; }
  .model-boundary { border-color: var(--ink); }
  .build-details { border: 1px solid var(--ink); background: var(--light); }
  .build-details > summary { padding: 1.25rem; font-family: var(--mono); font-size: 1rem; }
  .build-details[open] > summary { border-bottom: 1px solid var(--ink); background: var(--soft); }
  .build-details > :not(summary) { margin-inline: 1.25rem; }
  .build-details .ledger-intro { padding-top: 1.25rem; }
  .build-details .roadmap-footnote { padding-bottom: 1.25rem; }
  .window-bar { border-color: var(--ink); }
  .roadmap-stage { border-color: var(--line); }
  .roadmap-tasks li { padding-bottom: .6rem; border-bottom: 1px dotted var(--line); }
  .task-state { font-family: var(--mono); }
  .guide-links { align-self: start; border: 1px solid var(--ink); }
  .guide-links a { padding-inline: 1rem; border-color: var(--ink); font: .875rem/1.6 var(--mono); }
  .guide-links a:last-child { border-bottom: 0; }
  .site-footer { margin-bottom: 2rem; padding: 1.25rem; border: 1px solid var(--ink); gap: 1rem 1.5rem; }
  .site-footer > span { font: .8125rem/1.6 var(--mono); }
  .site-footer nav { gap: 0; border-color: var(--ink); }
  .site-footer nav a { padding-inline: .9rem; font: .8125rem var(--mono); border-right: 1px solid var(--line); }
  .site-footer nav a:first-child { padding-left: 0; }
  .site-footer nav a:last-child { border-right: 0; }
  .line-tabs button[aria-selected="true"]:focus-visible { outline-color: var(--paper); }
  @media (hover: hover) and (pointer: fine) { .guide-links a:hover { color: var(--light); background: var(--ink); } .owner-rules summary:hover, .build-details > summary:hover { background: var(--soft); } }
  @media (min-width: 48rem) {
    .model-steps { gap: 0; border-top: 3px solid var(--accent); }
    .model-steps li { border: 0; padding: 2rem 1.5rem; }
    .model-steps li + li { border-top: 0; border-left: 1px solid var(--ink); }
    .cord-node { left: 1.5rem; top: -.45rem; }
  }
}

@layer responsive {
  @media (max-width: 47.99rem) {
    .site-footer nav { display: grid; grid-template-columns: 1fr 1fr; padding-top: 0; }
    .site-footer nav a { padding-inline: .75rem; border: 0; border-bottom: 1px solid var(--line); }
    .site-footer nav a:nth-child(odd) { border-right: 1px solid var(--line); }
    .site-footer nav a:first-child { padding-left: .75rem; }
    .site-footer nav a:last-child { grid-column: 1 / -1; border: 0; }
  }
}

@layer responsive {
  /* Launch pages share the existing paper and black dove identity. */
  .launch-page { min-height: 100dvh; display: flex; flex-direction: column; }
  .launch-header, .launch-main, .launch-footer { width: min(100% - 3rem, 88rem); margin-inline: auto; }
  .launch-header { display: flex; justify-content: space-between; align-items: center; min-height: 4.5rem; border-bottom: 1px solid var(--ink); }
  .launch-header .wordmark { font-size: 1.75rem; }
  .launch-state { font: .8125rem var(--mono); }
  .launch-main { flex: 1; display: grid; align-items: center; padding-block: 2.5rem; }
  .launch-cover, .signup-cover { display: grid; grid-template-columns: minmax(0, .85fr) minmax(0, 1.3fr); border: 1px solid var(--ink); box-shadow: 5px 5px 0 var(--ink); background: var(--light); }
  .launch-copy { display: flex; flex-direction: column; align-items: flex-start; justify-content: center; padding: clamp(1.5rem, 3.5vw, 3rem); }
  .launch-copy h1 { font-size: clamp(3rem, 6.5vw, 6rem); font-weight: 600; line-height: 1.1; padding-bottom: .15em; }
  .launch-copy > p { max-width: 26ch; margin-block: 1rem 1.75rem; color: var(--muted); font-size: 1.125rem; }
  .launch-page .button { border-radius: 0; white-space: nowrap; }
  .launch-art, .signup-art { border-left: 1px solid var(--ink); background: var(--soft); overflow: hidden; }
  .launch-art picture { display: flex; height: 100%; }
  .launch-art img { width: 100%; height: 100%; min-height: 31rem; object-fit: cover; }
  .launch-art img, .signup-art img { filter: grayscale(1) contrast(1.06); }
  .launch-footer { display: flex; justify-content: space-between; align-items: center; gap: 1rem 2rem; flex-wrap: wrap; padding-block: 1rem 1.5rem; border-top: 1px solid var(--ink); font: .75rem/1.6 var(--mono); color: var(--muted); }
  .launch-footer nav { gap: 1.5rem; }
  .launch-footer nav a { font: inherit; min-height: 2.75rem; text-decoration: underline; }
  .signup-cover { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
  .signup-copy { padding: clamp(1.5rem, 3vw, 3rem); }
  .back-link { display: inline-flex; align-items: center; min-height: 2.75rem; font: .8125rem var(--mono); }
  .signup-copy h1 { font-size: clamp(2.75rem, 5vw, 4.75rem); font-weight: 600; line-height: 1.1; padding-bottom: .15em; margin-top: .5rem; }
  .signup-copy > p:first-of-type { margin-block: .75rem 1.5rem; color: var(--muted); }
  .signup-art img { width: 100%; height: 100%; object-fit: cover; }
  #signup-form { max-width: 28rem; }
  .input-group label { display: block; font-size: .875rem; font-weight: 600; margin-bottom: .5rem; }
  .input-group input { display: block; width: 100%; height: 3.25rem; padding: .75rem; background: var(--paper); color: var(--ink); border: 1px solid var(--ink); border-radius: 0; }
  .input-group input::placeholder { color: var(--muted); opacity: 1; }
  .launch-page input:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; }
  .input-group input[aria-invalid="true"] { border: 2px solid var(--accent); }
  .consent-field { display: flex; align-items: center; gap: .75rem; min-height: 3rem; margin-block: .75rem; cursor: pointer; font-size: .875rem; }
  .consent-field input { flex: none; width: 1.25rem; height: 1.25rem; accent-color: var(--accent); margin: 0; }
  .honey-field { display: none; }
  .signup-notice, #signup-status, .field-error { font-size: .8125rem; line-height: 1.6; }
  .signup-notice { max-width: 28rem; color: var(--muted); margin-top: 1.25rem; }
  .field-error { color: var(--accent); margin-top: .5rem; }
  #signup-status:not(:empty) { padding: 1rem; margin-top: 1rem; border: 1px solid var(--ink); background: var(--paper); }
  #signup-status[data-state="error"] { border-color: var(--accent); color: var(--accent); }
  #signup-form[aria-busy="true"] .button { background: var(--ink); color: var(--light); cursor: wait; }
  @media (min-width: 48rem) and (max-width: 70rem) { .launch-copy { padding: 2rem; } .launch-art img { min-height: 27rem; } }
  @media (max-width: 47.99rem) {
    .launch-header, .launch-main, .launch-footer { width: calc(100% - 2rem); }
    .launch-header { min-height: 4.5rem; }
    .launch-header .wordmark { font-size: 1.5rem; }
    .launch-header .wordmark img { margin-right: .35rem; }
    .launch-main { padding-block: 1.5rem; align-items: start; }
    .launch-cover, .signup-cover { grid-template-columns: 1fr; }
    .launch-copy { padding: 1.75rem; }
    .launch-copy h1 { font-size: clamp(3rem, 13vw, 5rem); }
    .launch-copy > p { max-width: 27ch; margin-block: .5rem 1.25rem; font-size: 1rem; }
    .launch-art, .signup-art { border-left: 0; border-top: 1px solid var(--ink); }
    .launch-art picture { height: auto; }
    .launch-art img { min-height: 0; height: auto; aspect-ratio: 1.25; object-position: center 48%; }
    .signup-copy { padding: 1.5rem; }
    .signup-copy h1 { font-size: 3.5rem; }
    .signup-art { display: none; }
    #signup-form .button { width: 100%; }
    .launch-footer { gap: .25rem 1rem; }
  }
}

@layer responsive {
  .launch-footer { justify-content: center; text-align: center; }
  .launch-footer p { text-wrap: balance; }
  .launch-footer p > span[aria-hidden] { margin-inline: .5rem; }
  .launch-footer .footer-credit { display: inline-block; white-space: nowrap; }
  .launch-footer p > a { display: inline-flex; align-items: center; min-height: 2.75rem; text-decoration: underline; }
}

@layer responsive {
  .hero-page .launch-main { width: 100%; margin: 0; padding: 0; display: block; flex: none; }
  .hero-page .launch-cover { position: relative; isolation: isolate; display: grid; align-items: center; min-height: calc(100svh - 4.5rem); border: 0; box-shadow: none; background: var(--paper); overflow: hidden; }
  .hero-page .launch-copy { position: relative; z-index: 2; width: min(100% - 3rem, 88rem); margin-inline: auto; padding: 4rem clamp(1.5rem, 3.5vw, 3rem); pointer-events: none; }
  .hero-page .launch-copy a { pointer-events: auto; }
  .hero-page .launch-copy h1 { font-size: clamp(3rem, 6.5vw, 6rem); }
  .hero-page .launch-art { position: absolute; inset: 0; z-index: 0; border: 0; }
  .hero-page .launch-art picture, .hero-page .launch-art img { width: 100%; height: 100%; min-height: 0; }
  .hero-page .launch-art img { object-fit: cover; object-position: center; image-rendering: pixelated; }
  .hero-page .launch-art::after { content: ''; position: absolute; inset: 0; background: linear-gradient(90deg, #f3f2ee 0%, rgb(243 242 238 / .98) 25%, rgb(243 242 238 / .88) 40%, rgb(243 242 238 / 0) 72%); pointer-events: none; }
  .hero-pixels { position: absolute; inset: 0; width: 100%; height: 100%; image-rendering: pixelated; opacity: 0; }
  .hero-pixels[data-ready] { opacity: 1; }
  .hero-page .launch-footer { margin-top: 0; }
  @media (max-width: 47.99rem) {
    .hero-page .launch-copy { width: calc(100% - 2rem); padding: 2rem 1rem 14rem; }
    .hero-page .launch-copy h1 { font-size: clamp(3rem, 13vw, 5rem); }
    .hero-page .launch-cover { align-items: start; }
    .hero-page .launch-art::after { background: linear-gradient(180deg, #f3f2ee 0%, rgb(243 242 238 / .98) 30%, rgb(243 242 238 / .86) 49%, rgb(243 242 238 / 0) 76%); }
    .hero-page .launch-art img { aspect-ratio: auto; object-position: 60% center; }
  }
}

@layer responsive {
  @media (max-height: 32rem) and (min-width: 48rem) {
    .hero-page .launch-copy { padding-block: 1rem; }
    .hero-page .launch-copy h1 { font-size: 2.75rem; line-height: 1.05; }
    .hero-page .launch-copy > p { margin-block: .5rem 1rem; font-size: 1rem; }
  }
}

@layer responsive {
  .signup-page .signup-cover { display: grid; grid-template-columns: 1fr; justify-items: start; padding: 2.5rem max(1.5rem, calc((100% - 82rem) / 2)); }
  .signup-page .signup-copy { position: relative; z-index: 2; width: min(100%, 31rem); padding: 1.5rem 2rem 2rem; background: var(--light); border: 1px solid var(--ink); box-shadow: 5px 5px 0 var(--ink); }
  .signup-page .signup-copy h1 { font-size: clamp(2.75rem, 4vw, 4rem); }
  .signup-page .launch-art::after { background: rgb(243 242 238 / .12); }
  .hero-page { cursor: crosshair; }
  .hero-page a, .hero-page button, .hero-page label[for], .hero-page .consent-field, .hero-page .consent-field input { cursor: pointer; }
  .hero-page input[type=email] { cursor: text; }
  .hero-page .launch-art { overflow: hidden; }
  .hero-page .hero-pixels, .hero-page .launch-art picture { transform: scale(1.025); transform-origin: 65% 50%; }
  .scene-entered .hero-pixels, .scene-entered .launch-art picture { animation: scene-arrive 16s linear infinite alternate; animation-delay: var(--scene-phase, 0ms); }
  .scene-entered .launch-copy { animation: copy-arrive .45s both; }
  .scene-entered .signup-copy { animation: form-arrive .35s both; }
  .hero-page .button, .hero-page .wordmark, .hero-page .back-link { transition: transform .18s ease, box-shadow .18s ease, background-color .18s ease, color .18s ease; }
  .hero-page .input-group input { transition: box-shadow .18s ease; }
  .hero-page .input-group input:focus-visible { box-shadow: 4px 4px 0 var(--ink); }
  @keyframes scene-arrive { 0% { transform: scale(1.025); animation-timing-function: cubic-bezier(.2,.65,.35,1); } 12.5% { transform: scale(1.14); } 100% { transform: scale(1.18); } }
  @keyframes copy-arrive { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }
  @keyframes form-arrive { from { transform: translateY(6px); } to { transform: translateY(0); } }
  @media (hover: hover) and (pointer: fine) {
    .hero-page .button:hover { transform: none; background: var(--paper); color: var(--ink); box-shadow: 4px 4px 0 var(--ink); }
    .hero-page .button:active { transform: translate(2px, 2px); box-shadow: 0 0 0 var(--ink); }
    .hero-page .wordmark:hover, .hero-page .back-link:hover { transform: translateX(3px); }
  }
  @media (max-width: 47.99rem) {
    .signup-page .signup-cover { padding: 1.5rem 1rem 3rem; }
    .signup-page .signup-copy { padding: 1rem 1.5rem 1.5rem; }
  }
  @media (prefers-reduced-motion: reduce) {
    .hero-page *, .hero-page *::before, .hero-page *::after { animation: none !important; transition: none !important; }
    .hero-page .hero-pixels, .hero-page .launch-art picture { transform: none; }
  }
}

@layer responsive {
  .hero-page:not(.signup-page) .launch-cover { grid-template-columns: 1fr; }
  .hero-page:not(.signup-page) .launch-copy { width: min(100% - 3rem, 52rem); align-items: center; text-align: center; padding-inline: 1rem; padding-block: 3rem; }
  .hero-page:not(.signup-page) .launch-copy > p { max-width: 36ch; }
  .hero-page:not(.signup-page) .launch-art::after { background: radial-gradient(ellipse at center, rgb(243 242 238 / .99) 0%, rgb(243 242 238 / .91) 28%, rgb(243 242 238 / .48) 52%, rgb(243 242 238 / .08) 90%); }
  .hero-stats { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); width: min(100%, 30rem); margin: 2rem 0 0; padding: 1.25rem 0 0; border-top: 1px solid var(--ink); }
  .hero-stats > div + div { border-left: 1px solid var(--ink); }
  .hero-stats dt { font: 600 2.25rem/1.1 var(--serif); font-variant-numeric: tabular-nums; min-height: 2.5rem; }
  .hero-stats dd { margin: .5rem 0 0; font: .75rem/1.5 var(--mono); }
  .signup-page .signup-cover { justify-items: center; }
  @media (max-width: 47.99rem) {
    .hero-page:not(.signup-page) .launch-cover { align-items: center; }
    .hero-page:not(.signup-page) .launch-copy { padding-block: 2rem; }
    .hero-stats { margin-top: 1.5rem; }
    .hero-stats dt { font-size: 1.75rem; min-height: 2rem; }
    .hero-stats dd { font-size: .6875rem; }
  }
  @media (max-height: 32rem) and (min-width: 48rem) {
    .hero-page:not(.signup-page) .launch-copy { padding-block: 1rem; }
    .hero-page:not(.signup-page) .launch-copy h1 { font-size: 2.25rem; }
    .hero-page:not(.signup-page) .launch-copy > p { max-width: 60ch; margin-block: .25rem .5rem; }
    .hero-stats { margin-top: .75rem; padding-top: .5rem; }
    .hero-stats dt { font-size: 1.5rem; min-height: 1.5rem; }
    .hero-stats dd { margin-top: .15rem; }
  }
}

@layer responsive { .hero-wake { position: absolute; inset: 0; width: 100%; height: 100%; image-rendering: pixelated; pointer-events: none; z-index: 1; } }

@layer responsive {
  .stat-infinity { display: inline-block; transform-origin: center; }
  .scene-entered .stat-infinity { animation: infinity-loop 3.6s ease-in-out infinite; }
  @keyframes infinity-loop {
    0%, 100% { transform: rotate(-5deg) scale(.96); }
    50% { transform: rotate(5deg) scale(1.08); }
  }
  @media (prefers-reduced-motion: reduce) {
    .scene-entered .stat-infinity { animation: none; }
  }
}

/* Typography and proportions follow the CoderLuii display system. */
@layer responsive {
  :root {
    --serif: 'Perfectly Nineties', Georgia, serif;
    --sans: 'Suisse Intl', Arial, sans-serif;
    --mono: 'FK Raster Grotesk Compact Blended', monospace;
  }
  .hero-page:not(.signup-page) .launch-copy { width: min(100% - 3rem, 80rem); padding: 3rem 0; }
  .launch-eyebrow { font: 500 1rem/1.2 var(--sans); letter-spacing: .14em; text-transform: uppercase; margin-bottom: 21.424px; }
  .hero-page .launch-copy h1 { font: 400 70px/.98 var(--serif); letter-spacing: .005em; padding-bottom: 0; }
  .hero-page .launch-copy h1 em { font-style: normal; }
  .hero-page:not(.signup-page) .launch-copy > p { max-width: 600px; font: 400 22px/1.34 var(--sans); letter-spacing: -.018em; margin-block: 24.72px 23.072px; }
  .hero-page .button { font: 400 14.08px/1 var(--mono); letter-spacing: 1px; text-transform: uppercase; min-width: 206px; min-height: 49px; justify-content: space-between; }
  .hero-stats { width: min(100%, 66rem); margin-top: 50px; padding-top: 23px; border-top: 1px solid rgb(0 0 0 / .38); }
  .hero-stats > div + div { border-left: 0; }
  .hero-stats dt { font: 400 60px/1 var(--serif); letter-spacing: .005em; min-height: 60px; }
  .hero-stats dd { max-width: 18ch; margin: 9.6px auto 0; font: 300 13px/1.35 var(--sans); }
  .signup-copy h1 { font-weight: 400; }
  .signup-copy h1 em { font-style: normal; }
  @media (max-width: 47.99rem) {
    .hero-page:not(.signup-page) .launch-copy { width: calc(100% - 2rem); padding: 2rem 0; }
    .hero-page .launch-copy h1 { font-size: clamp(48px, 10vw, 70px); }
    .launch-eyebrow { font-size: 12px; margin-bottom: 1.25rem; }
    .hero-page:not(.signup-page) .launch-copy > p { font-size: 18px; margin-block: 1.5rem; max-width: 30ch; }
    .hero-stats { margin-top: 2rem; padding-top: 1.25rem; }
    .hero-stats dt { font-size: 42px; min-height: 42px; }
    .hero-stats dd { padding-inline: .25rem; font-size: 12px; }
  }
  @media (max-height: 32rem) and (min-width: 48rem) {
    .hero-page:not(.signup-page) .launch-copy { padding-block: 1rem; }
    .launch-eyebrow { font-size: 11px; margin-bottom: .5rem; }
    .hero-page .launch-copy h1 { font-size: 38px; }
    .hero-page:not(.signup-page) .launch-copy > p { font-size: 16px; margin-block: .5rem; }
    .hero-stats { margin-top: 1rem; padding-top: .75rem; }
    .hero-stats dt { font-size: 36px; min-height: 36px; }
    .hero-stats dd { margin-top: .25rem; }
  }
}

/* CoderLuii control geometry, using HolyLine's paper-and-ink palette. */
@layer responsive {
  .hero-page .button {
    width: 206px; max-width: 100%; min-width: 0; min-height: 49px;
    gap: 32.96px; padding: 14.42px 20.6px; border: 1px solid var(--ink);
    border-radius: 0; box-shadow: none; transform: none;
    background: var(--ink); color: var(--light);
    transition: background-color .18s cubic-bezier(.23,1,.32,1), border-color .18s cubic-bezier(.23,1,.32,1), color .18s cubic-bezier(.23,1,.32,1), transform .14s cubic-bezier(.23,1,.32,1);
  }
  .hero-page .button-arrow { flex: none; font-size: 18.128px; line-height: 1; }
  .hero-page .button:focus-visible { outline: 3px solid var(--ink); outline-offset: 5px; }
  @media (hover: hover) and (pointer: fine) {
    .hero-page .button:hover:not(:disabled) { background: var(--accent-dark); border-color: var(--accent-dark); color: var(--light); box-shadow: none; transform: translateY(-2px); }
  }
  .hero-page .button:active:not(:disabled) { background: var(--accent-dark); color: var(--light); box-shadow: none; transform: scale(.97); }
  .hero-page .button:disabled { opacity: .7; transform: none; }
  #signup-form[aria-busy="true"] .button-arrow { visibility: hidden; }
}

@layer responsive {
  .hero-page::after {
    content: ''; position: fixed; inset: 0; z-index: 10000;
    border: 6px solid #fff; pointer-events: none;
  }
  .launch-footer { font-size: 13px; line-height: 1.8; letter-spacing: .065em; word-spacing: .15em; }
  @media (max-width: 47.99rem) {
    .hero-page::after { border-width: 4px; }
  }
}

/* White editorial type over the original dithered photograph. */
@layer responsive {
  .hero-page:not(.signup-page) .launch-copy,
  .hero-page:not(.signup-page) .launch-copy > p { color: #fff; }
  .hero-page:not(.signup-page) .launch-art::after { background: rgb(0 0 0 / .64); }
  .hero-page:not(.signup-page) .hero-stats { border-top-color: rgb(255 255 255 / .5); }
  .hero-page:not(.signup-page) .button:focus-visible { outline-color: #fff; }
  .hero-page .launch-footer { color: #fff; background: #171717; border-top-color: rgb(255 255 255 / .35); width: 100%; padding-inline: 1.5rem; }
}
@layer responsive {
  .hero-page:not(.signup-page) .launch-copy h1 em { color: inherit; }
}

@layer responsive {
  .launch-state { letter-spacing: .065em; word-spacing: .15em; line-height: 1.8; }
}