:root {
  color-scheme: dark;
  --ink: oklch(0.15 0.018 288);
  --ink-raised: oklch(0.205 0.024 288);
  --paper: oklch(0.94 0.018 76);
  --muted: oklch(0.72 0.025 286);
  --thread: oklch(0.69 0.205 31);
  --thread-hot: oklch(0.78 0.17 52);
  --line: oklch(0.34 0.035 287);
  --success: oklch(0.77 0.14 151);
  --focus: oklch(0.86 0.13 79);
  --display: "Avenir Next Condensed", "Arial Narrow", "Roboto Condensed", sans-serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono: ui-monospace, "SFMono-Regular", Consolas, monospace;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background:
    radial-gradient(circle at 72% 12%, oklch(0.24 0.06 293 / 0.33), transparent 36rem),
    var(--ink);
  color: var(--paper);
  font-family: var(--sans);
  font-size: 1rem;
  line-height: 1.6;
  letter-spacing: 0.01em;
}
a { color: inherit; text-underline-offset: 0.23em; }
button, input { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 4px; }
.skip-link { position: fixed; top: 0.75rem; left: 0.75rem; z-index: 20; padding: 0.7rem 1rem; background: var(--paper); color: var(--ink); transform: translateY(-150%); transition: transform 180ms var(--ease-out); }
.skip-link:focus { transform: translateY(0); }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }

.site-header, footer { max-width: 92rem; margin: 0 auto; padding: 1.4rem clamp(1.25rem, 4vw, 4.5rem); display: flex; align-items: center; justify-content: space-between; gap: 2rem; }
.site-header { border-bottom: 1px solid oklch(0.34 0.035 287 / 0.7); }
.brand { display: inline-flex; align-items: center; gap: 0.7rem; font-family: var(--display); font-weight: 800; letter-spacing: 0.16em; text-transform: uppercase; text-decoration: none; }
.brand svg { width: 1.8rem; fill: var(--paper); }
.site-header nav, footer nav { display: flex; align-items: center; gap: clamp(1rem, 3vw, 2.5rem); }
.site-header nav a, footer nav a { color: var(--muted); text-decoration: none; font-size: 0.875rem; }
.site-header nav a:hover, footer nav a:hover { color: var(--paper); }

main { overflow: clip; }
.hero { max-width: 92rem; min-height: 50rem; margin: 0 auto; padding: clamp(4rem, 8vw, 8rem) clamp(1.25rem, 4vw, 4.5rem) 4.5rem; display: grid; grid-template-columns: repeat(12, 1fr); gap: 1.5rem; align-items: center; }
.hero-copy { grid-column: 1 / span 4; grid-row: 1; align-self: start; z-index: 2; }
.eyebrow { margin: 0 0 1rem; color: var(--thread-hot); font-size: 0.75rem; font-weight: 800; letter-spacing: 0.13em; text-transform: uppercase; }
h1, h2, h3, p { text-wrap: pretty; }
h1 { margin: 0; font-family: var(--display); font-size: clamp(4rem, 8.5vw, 8rem); font-stretch: condensed; font-weight: 900; letter-spacing: -0.045em; line-height: 0.82; text-transform: uppercase; text-wrap: balance; }
h1 strong { color: var(--thread); font-weight: inherit; }
.lede { max-width: 38rem; margin: 2rem 0; color: var(--muted); font-size: clamp(1.05rem, 1.8vw, 1.35rem); line-height: 1.55; }
.primary-link { display: inline-flex; min-height: 3.25rem; align-items: center; gap: 1rem; padding: 0.7rem 1.15rem; background: var(--thread); color: var(--ink); font-weight: 800; text-decoration: none; transition: transform 220ms var(--ease-out), background 220ms var(--ease-out); }
.primary-link:hover { transform: translateY(-2px); background: var(--thread-hot); }

.convergence { position: relative; grid-column: 5 / -1; grid-row: 1; min-height: 31rem; align-self: start; margin-top: 0.5rem; }
.fragments { position: absolute; inset: 0 auto 0 0; width: 32%; display: flex; flex-direction: column; justify-content: space-around; z-index: 2; }
.fragments span { width: fit-content; max-width: 100%; padding: 0.45rem 0.65rem; border: 1px solid var(--line); background: var(--ink-raised); color: var(--muted); font-family: var(--mono); font-size: clamp(0.6rem, 0.8vw, 0.75rem); animation: fragment-drift 5s calc(var(--i) * -0.6s) ease-in-out infinite alternate; }
.fragments span:nth-child(1) { --i: 0; }.fragments span:nth-child(2) { --i: 1; }.fragments span:nth-child(3) { --i: 2; }.fragments span:nth-child(4) { --i: 3; }.fragments span:nth-child(5) { --i: 4; }.fragments span:nth-child(6) { --i: 5; }
.threads { position: absolute; inset: 0 11% 0 7%; width: 77%; height: 100%; overflow: visible; }
.threads path { fill: none; stroke: var(--thread); stroke-width: 1.8; vector-effect: non-scaling-stroke; stroke-dasharray: 800; stroke-dashoffset: 800; animation: draw-thread 2.2s calc(0.15s * var(--i, 1)) var(--ease-out) forwards; filter: drop-shadow(0 0 5px oklch(0.69 0.205 31 / 0.5)); }
.threads path:nth-child(2) { --i: 2; }.threads path:nth-child(3) { --i: 3; }.threads path:nth-child(4) { --i: 4; }.threads path:nth-child(5) { --i: 5; }.threads path:nth-child(6) { --i: 6; }
.threads .spine { stroke-width: 4; --i: 5; }
.throat { position: absolute; left: 66%; top: 43%; z-index: 3; width: 2.3rem; height: 4.7rem; display: flex; justify-content: space-between; transform: translate(-50%, -50%); }
.throat i { display: block; width: 0.35rem; border: 1px solid oklch(0.52 0.04 290); background: var(--ink); box-shadow: 0 0 0 2px oklch(0.1 0.01 290); }
.package { position: absolute; right: 0; top: 17%; z-index: 4; width: clamp(10.5rem, 18vw, 15rem); aspect-ratio: 0.8; padding: 1.5rem; display: flex; flex-direction: column; background: var(--paper); color: var(--ink); box-shadow: 1rem 1.25rem 3rem oklch(0.06 0.02 288 / 0.7); transform: rotate(1.5deg); transition: transform 600ms var(--ease-out); }
.convergence[data-ready="true"] .package { transform: rotate(0deg) translateX(-0.5rem); }
.package::before { content: ""; position: absolute; inset: 0; opacity: 0.32; background: repeating-linear-gradient(76deg, transparent 0 11px, oklch(0.71 0.04 78) 12px, transparent 13px 22px); mix-blend-mode: multiply; pointer-events: none; }
.package-kicker, .package-file { position: relative; font-size: 0.65rem; font-weight: 800; letter-spacing: 0.1em; text-transform: uppercase; }
.package strong { position: relative; margin-top: 1.25rem; font-family: var(--display); font-size: clamp(2rem, 3vw, 3.1rem); line-height: 0.85; text-transform: uppercase; }
.package-file { margin-top: 0.8rem; font-family: var(--mono); }
.seal { position: relative; margin: auto 0 0 auto; padding: 0.5rem; border: 2px solid var(--thread); color: oklch(0.49 0.19 31); font-family: var(--display); font-weight: 900; letter-spacing: 0.06em; line-height: 1; text-align: center; text-transform: uppercase; transform: rotate(-5deg); }
.principles { grid-column: 1 / -1; grid-row: 2; align-self: end; margin: 2rem 0 0; padding: 2rem 0 0; border-top: 1px solid var(--line); display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem; list-style: none; }
.principles li { display: grid; grid-template-columns: auto 1fr; gap: 0 0.8rem; }
.principles span { grid-row: span 2; color: var(--thread-hot); font-family: var(--mono); font-size: 0.75rem; }
.principles strong { line-height: 1.25; }.principles small { color: var(--muted); line-height: 1.45; }

.generator-section { padding: clamp(4rem, 8vw, 8rem) max(clamp(1.25rem, 4vw, 4.5rem), calc((100vw - 92rem) / 2)); background: oklch(0.19 0.025 288); border-block: 1px solid var(--line); }
.section-heading { display: grid; grid-template-columns: 1fr auto; align-items: end; gap: 0.5rem 2rem; margin-bottom: 2.5rem; }
.section-heading .eyebrow { grid-column: 1 / -1; }
h2 { max-width: 17ch; margin: 0; font-family: var(--display); font-size: clamp(2.7rem, 5vw, 5rem); font-weight: 900; letter-spacing: -0.035em; line-height: 0.95; text-transform: uppercase; }
.example-button { min-height: 2.75rem; padding: 0.55rem 0; border: 0; border-bottom: 1px solid var(--thread); background: transparent; color: var(--paper); cursor: pointer; text-align: left; }
#generator-form { display: grid; grid-template-columns: minmax(18rem, 0.8fr) minmax(30rem, 1.2fr); gap: clamp(2rem, 5vw, 5rem); padding-top: 2.5rem; border-top: 1px solid var(--line); }
.fields { display: grid; align-content: start; gap: 0.65rem; }
label, .output-block h3 { font-size: 0.75rem; letter-spacing: 0.08em; text-transform: uppercase; }
label span, .output-block h3 span { margin-right: 0.7rem; color: var(--thread-hot); font-family: var(--mono); }
input { width: 100%; min-height: 3.8rem; padding: 0.75rem 1rem; border: 1px solid var(--line); border-radius: 0; background: var(--ink); color: var(--paper); font-family: var(--mono); }
input:focus { border-color: var(--focus); }
input[aria-invalid="true"] { border-color: var(--thread); }
.field-message { min-height: 1.5rem; margin: 0 0 1.4rem; color: var(--muted); font-size: 0.8rem; }
input[aria-invalid="true"] + .field-message { color: oklch(0.79 0.14 35); }
.scope-picker { margin: 0; padding: 0; border: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 0.65rem; }
.scope-picker legend { width: 100%; margin-bottom: 0.65rem; padding: 0; font-size: 0.75rem; letter-spacing: 0.08em; text-transform: uppercase; }
.scope-picker legend span { margin-right: 0.7rem; color: var(--thread-hot); font-family: var(--mono); }
.scope-option { position: relative; min-height: 5.5rem; padding: 0.85rem; border: 1px solid var(--line); display: flex; align-items: flex-start; gap: 0.65rem; cursor: pointer; letter-spacing: normal; text-transform: none; }
.scope-option:has(input:checked) { border-color: var(--thread-hot); background: oklch(0.24 0.04 289); }
.scope-option input { flex: 0 0 auto; width: 1.1rem; min-height: 1.1rem; margin: 0.15rem 0 0; padding: 0; accent-color: var(--thread); }
.scope-option span { display: grid; gap: 0.25rem; }.scope-option strong { color: var(--paper); }.scope-option small { color: var(--muted); line-height: 1.35; }
.outputs { display: grid; gap: 1.5rem; }
.output-block { border-top: 1px solid var(--line); }
.output-block header { display: flex; align-items: center; justify-content: space-between; gap: 1rem; min-height: 3.8rem; }
.output-block h3 { margin: 0; font-weight: 700; }
.output-block button { min-height: 2.75rem; padding: 0.55rem 0.85rem; border: 1px solid var(--line); border-radius: 0; background: transparent; color: var(--paper); cursor: pointer; }
.output-block button:not(:disabled):hover { border-color: var(--thread-hot); color: var(--thread-hot); }
.output-block button:disabled { opacity: 0.42; cursor: not-allowed; }
pre { max-width: 100%; margin: 0; padding: 1.1rem; overflow: auto; border: 1px solid var(--line); background: var(--ink); color: oklch(0.84 0.025 285); font-family: var(--mono); font-size: 0.82rem; line-height: 1.7; white-space: pre-wrap; overflow-wrap: anywhere; }
.prompt-block pre { min-height: 12rem; max-height: 22rem; }
.dependency-note { margin: 0; color: var(--muted); font-size: 0.8rem; }

.provenance { max-width: 92rem; margin: 0 auto; padding: clamp(5rem, 10vw, 10rem) clamp(1.25rem, 4vw, 4.5rem); display: grid; grid-template-columns: 0.8fr 1.2fr; gap: clamp(3rem, 10vw, 10rem); align-items: start; }
.provenance ol { margin: 0; padding: 0; border-top: 1px solid var(--line); list-style: none; }
.provenance li { min-height: 4.8rem; padding: 1rem 0; border-bottom: 1px solid var(--line); display: grid; grid-template-columns: 1fr 1.4fr; align-items: center; gap: 1rem; }
.provenance li span { color: var(--muted); }.provenance code { color: var(--paper); overflow-wrap: anywhere; }
footer { padding-block: 3rem; border-top: 1px solid var(--line); flex-wrap: wrap; }
footer p { color: var(--muted); font-size: 0.85rem; }

@keyframes draw-thread { to { stroke-dashoffset: 0; } }
@keyframes fragment-drift { to { transform: translate3d(5px, -3px, 0); } }

@media (max-width: 900px) {
  .site-header nav a:not(:last-child) { display: none; }
  .hero { display: block; min-height: auto; }
  .hero-copy { max-width: 44rem; }
  .convergence { min-height: 30rem; margin-top: 3rem; }
  .principles { margin-top: 1rem; }
  #generator-form { grid-template-columns: 1fr; }
  .provenance { grid-template-columns: 1fr; }
}

@media (max-width: 620px) {
  .site-header { padding-block: 1rem; }.site-header .brand { font-size: 0.82rem; }.site-header nav { gap: 0; }
  h1 { font-size: clamp(3.8rem, 19vw, 6rem); }
  .hero { padding-top: 3.5rem; }
  .convergence { min-height: 38rem; display: flex; flex-direction: column; justify-content: space-between; }
  .fragments { position: relative; width: 100%; height: 12rem; display: grid; grid-template-columns: repeat(2, 1fr); gap: 0.65rem; }
  .fragments span { align-self: center; }
  .threads { inset: 8rem 5% 8rem; width: 90%; height: 21rem; transform: rotate(90deg) scale(0.7, 1.2); }
  .throat { left: 50%; top: 52%; transform: translate(-50%, -50%) rotate(90deg); }
  .package { position: relative; top: auto; right: auto; width: 11rem; margin: 11rem auto 0; }
  .principles { grid-template-columns: 1fr; gap: 1.2rem; }
  .section-heading { grid-template-columns: 1fr; }.section-heading .eyebrow { grid-column: 1; }.example-button { margin-top: 1rem; }
  .output-block header { align-items: flex-end; }.output-block button { flex: 0 0 auto; }
  .scope-picker { grid-template-columns: 1fr; }
  .provenance li { grid-template-columns: 1fr; gap: 0.25rem; }
  footer { align-items: flex-start; flex-direction: column; } footer nav { flex-wrap: wrap; gap: 1rem 1.5rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
  .threads path { stroke-dashoffset: 0; }
}

@media (forced-colors: active) {
  .package, .primary-link { border: 2px solid ButtonText; }
  .threads path { stroke: CanvasText; filter: none; }
}